Method of metals pressing and device for its implementation

FIELD: technological processes.

SUBSTANCE: for one technological operation two types of pressing are carried out. As one type direct pressing of metal is used from container to its exit via calibrating zone. The second type is equal-channel angular pressing with provision of shift deformations in metal. Direct pressing is carried out prior to angular pressing. Shift deformations at angular pressing are provided immediately after metal exit from calibrating zone of direct pressing. Pressing is performed in the device that contains puncheon, matrix with two crossing channels and container. Container is installed above the matrix. Container cavity forms inlet part of vertically installed matrix channel. Area of inlet part cross section exceeds cross section area of vertically installed channel. The latter is arranged in the form of calibrating belt for direct pressing of metal from container. Height of belt makes 4-10 mm, and its diameter is equal to diameter of matrix second channel.

EFFECT: production of long-length items with high mechanical properties from different structural materials with simultaneous reduction of power intensity.

6 cl, 4 dwg, 3 ex

 

The invention relates to the processing of materials, mainly metal, pressure, and in particular to methods of pressing, providing long rods of different cross-sections (circle, square, rectangle, hexagon, pipe etc) with homogeneous microcrystalline, including submicro - and nanocrystalline structure. Processing can also be in powder, pellet and composite materials.

Known methods of pressing of metals, providing fine grained, including submicrocrystalline structure due to intensive shear plastic deformation. Metals with this structure, compared to coarse-grained, have better mechanical properties

There is a method of equal-channel angular pressing (CGS) by pushing the workpiece through a die placed in it two intersecting channels of equal cross-section (patent RF №2128055, MKI VS 25/00, publ. 27.03.99 year).

The disadvantage of this method is the inability to obtain long rods with a fine crystalline structure. When equal-channel angular pressing the channel which contains the workpiece has a length equal to the length of the workpiece. The length of the billet during the extrusion does not change. Modern metallurgical PR the industry delivers engineering plants, according to the present gauge, extruded rods ranging in length from 3 to 8 meters. To handle these rods with the aim of getting them in the crystalline structure in a known manner CMR-pressing need to produce a matrix of the same length and have a press for pressing stroke of the movable beam 3-8 meters. This technology, first, unreal, and secondly, economically impractical, as in a matrix such length of the friction force will be very large, and all the power of the press will be spent on overcoming them. In addition, the structure of the press with such a stroke of the movable beam is simply impossible.

Famous classical (conventional) way of direct pressing (pressing direct-expiry) (Perlin, I., Reitberg LH Theory extrusion of metals. M.: metallurgy, 1975, 448 S., see figure 1.1 on page 17), in which the billet is extruded from a container of large diameter punch (press stamp) with the press washer through the hole in the matrix of small diameter. As the workpiece during pressing are used even ingots with a diameter up to 600 mm and height up to 1200 mm thus receive the rods of various cross sections, including hollow, with a diameter of from 3 to 250 mm and length up to 8 meters and more from a variety of structural materials (steel, non-ferrous metals and alloys). For pressing the emptiness of what's profile including pipes, apply workpiece with a through hole and a needle. Conventional pressing for many years is one of the main technological processes of rolled metal and is widely used in modern steel mills.

The advantage of this method is the possibility of obtaining long-length rods, of which at machine-building enterprises produce various machine parts and metal structures.

Conventional direct extrusion has three stages (see p.40-41 and is in the above mentioned book "theory of the pressing of metals" authors pearl I. and Reitberg LH): first, the initial stage, the second main stage of the process, the third - final.

In the first stage is repressive billet in the container and the filling of the compression of the metal of the channel matrix. The channel matrix has a conical (crimp) plot and calibrating belt height from 4 to 10 mm End of the first stage and the second starts with the release of metal from calibrating the belt out of the calibrating zone.

The disadvantage of this method is the inability to obtain rods with fine grained, submicrocrystalline and nanostructure due to the absence of the scheme pressing of intense shear strain.

Closest to the proposed method is combined the intensive plastic deformation of workpieces (patent RU 2240197 C1, MCI B21J 5/00, C22F 1/18, VS 25/00, publ. 20.11.2004,), comprising sequentially processes - extrusion in the screw channel and equal channel angular pressing.

The advantage of this method is the possibility of obtaining a semi-finished with a fine crystalline structure, since the circuit of this compaction method is intense shear strain. The disadvantage is the inability to obtain long (up to 8 m length) bars of equal or slight differences of the squares of the cross-sections of the final product and the original piece. Therefore, to manufacture this way long rods, as in the case of the method described above CMR-pressing, it is necessary to produce a matrix with the length of the channels is equal to the length of the resulting rod and have the appropriate press. Therefore, this method and similar are used only in the laboratory to study their influence on the structure and properties of metals.

It is also known device (patent RF №2128095, MKI VS 25/00, publ. 27.03.99,) CMR-pressing, containing a matrix placed in it two intersecting channels and a punch.

A disadvantage of this device is the inability to obtain long (up to 8 meters) products with crystalline structure. To obtain this the devices, as noted above, would require the matrix a height of 8 meters and a special press. This is due to the fact that the reception and output of intersecting channels in the matrix are equal to (or slightly different) cross-sectional area. It says the name of this compaction method - equal-channel angular pressing, i.e. the channels are equal. In addition, a large part of the power of the press would be spent on overcoming the frictional forces due to the large surface friction.

A device for conventional direct extrusion materials containing container which contains the original procurement, the matrix, punch and press washer (Perlin I.A., Reitberg LH Theory extrusion of metals. M.: metallurgy, 1975, 448 S. Cm. figure 1.1 on page 17).

When pressing the metal (the original form) is extruded from the container punch and press washer through the hole in the matrix, whose diameter corresponds to the cross section of the compression of the product and is much less than the cross-section of the container and the source of the workpiece. To obtain hollow articles, such as pipes, the device is supplied with a needle. The device provides for producing a length of 8 meters and more, because the diameter of the container is many times larger than the diameter of the channel matrix. This allows you to use the original preparation as well of large diameter and, hence, a large volume at otnositelno small length (up to 1.2 meters) and existing presses for pressing.

A disadvantage of this device is the inability to obtain products with a microcrystalline structure due to the lack of intense shear strain.

Closest to the present invention is a device for material processing pressure (patent of the Russian Federation 2188091, MKI VS 25/00, publ. 27.08.2002,) containing the punch, the matrix with vertical and horizontal channels and vertical channel is made with the lead-in part having the cross-sectional area several times greater than the cross-sectional area of the output side of the channel, the length of the output of the channel is greater than the length of workpiece, and the input portion of the horizontal channel has a cross sectional area equal to the cross-sectional area of the output of the vertical channel, the diameter of the output end of the horizontal channel is (0,6-0,95) the diameter of its front part.

The disadvantage of this device is the inability to obtain long items (length of 3-8 meters) with a crystalline structure. This is due to the fact that the diameter of the output end of the horizontal channel is slightly different from the diameter of the inlet part of the channel, the cross-sectional area which is equal to the sectional area of the workpiece. Therefore, to obtain products with a length of several meters would require the top matrix with the length of the output part of the ver is kalinago channel in a few meters. Such a matrix, first, would not have been able to install any of the known presses for pressing, and secondly, all the power of the press would be spent on overcoming the frictional forces at the output of the vertical channel due to the large surface friction. Therefore, this device is known and is similar to him, which is implemented CMR-extrusion, are used only in laboratory conditions when processing small (length : 10÷20 cm) blanks for research purposes.

The objective of the invention is a method of pressing with the use of intense shear deformation and device for its implementation, provide products by the length of 3-8 meters or more from a variety of structural materials with crystalline, including submicrocrystalline and nanostructure and, consequently, with high mechanical properties. In addition, the invention is directed to reducing the energy intensity of the process.

This problem is solved by the method of extrusion of metals, including the implementation of one technological operation of two types of pressing, as one of them using equal-channel angular pressing, providing metal shear deformation, which unlike the prototype as a second pressing use direct pressing of the container the EPA, with him through the calibrating zone, which is carried out before ranonline angular pressing, deformation of the shear equal channel angular pressing immediately provide at the output of the metal of the calibrating zone direct compression.

Suitable in the process are technological methods, which are as follows:

- when processing high-ductility metals equal channel angular pressing is carried out in three overlapping channels;

- to obtain a hollow profiles used the workpiece with a through hole.

The task is also solved by a device for the extrusion of metals, containing a punch, a matrix with two intersecting channels, one of which is vertical and is made with the lead-in part having a cross sectional area exceeding the cross-sectional area of a vertically positioned channel, which unlike the prototype device has placed over the matrix of the container, the cavity of which forms a lead-in portion of a vertically positioned channel matrix, which is made in the form of gage is used for direct extrusion of metal from a container having a height, component 4-10 mm, and a diameter equal to the diameter of the second channel matrix.

In addition, the implementation of this method is a whole is consistent with the use of the following design solutions:

in the case of extrusion of highly ductile metal matrix provided with a third channel for angular pressing in three overlapping channels;

- during the extrusion of metals to produce hollow profiles, such as pipes, the device is provided with a locking pin and needle, made with a broken axle and rigidly connected to the upper end of the strut, whereby the needle is installed with the software matches its broken axis with the axes of the container and intersecting channels of the matrix, the punch is made with a Central hole for the needle and cut for the cross member and is mounted for movement relative to them, the mandrel is located in the output channel matrix and mounted on the lower end of the needle with the possibility of slippage with the needle under the action of the compression of the metal, and the matrix is made in the form of two volumetric, bonded through the bandage.

Inventive step of the proposed method and device follows from the next.

It is known that conventional direct extrusion, in which the use of the workpiece of large diameter (several times larger than the diameter of the obtained rod), allows to obtain rods of great length (up to 8 meters and more). The combination of conventional direct extrusion and equal channel angular pressing so that the shear strain is exposed to the metal when the output is of the calibrating zone of direct pressing, enables formed by direct extrusion of the rod immediately be subjected to equal-channel angular pressing, which does not change the cross section of the rod is formed with a conventional direct extrusion, but carries the rod intense shear deformation, which is known to form in him a fine crystalline structure. With this combination of species pressing, there is no need to apply the matrix to equal channel angular pressing with a height equal to the length of one of the intersecting channels and the length of the resulting rod. This is because in the zone of intense shear strain equal channel angular pressing continuously fed metal coming out of the container direct pressing. The length of this section is equal to the height gage is used, i.e. 4-10 mm, This leads to a drastic reduction in friction compared to conventional channel by pressing, and reducing energy intensity of the process. Eventually rod is made with fine crystalline structure and length, which provides regular direct pressing with minimum energy costs.

If the processed metals have high plasticity, for example, pure copper, aluminum and low-alloy alloys, i.e. metals capable of very large deformations without fracture, the effect of izmelchenie the grain shear strain can be enhanced by increasing the latter. For this equal-channel angular pressing is carried out not in two but in three overlapping channels. The intensity of shear information is doubled. Get long rods with higher mechanical properties.

The problem is solved and in the case of manufacturing a long hollow rods, such as pipes and profiles with different cross-section geometry. It is known that the use of the workpiece with a through hole and the needle (the unit) when conventional direct extrusion allows to obtain hollow bars and rods of various cross-section and great length (3-8 meters or more). The combination of conventional direct extrusion and equal channel angular pressing of the workpiece with a through hole and the use of needles provides obtaining long hollow rods with a fine crystalline structure.

Running in the device for implementing the method, unlike the prototype, the lead-in portion of a vertically positioned channel matrix in the form of a container for a conventional direct extrusion, in which is laid down procurement, allows the use of the workpiece of large diameter and volume, and, consequently, to get the long rods. The combination of the output part of a vertically positioned channel matrix with the lead part of the second channel matrix can dramatically from what ratite the length of this lead-in portion and to expose the metal shear strain when the output from the output part of a vertically positioned channel matrix (calibrating zone direct compression) and thereby not only reduce power friction during pressing, but also to perform both matrices in the form of one, whose incorporation into the container makes the possibility of implementation of the proposed method.

Performing a matrix with three intersecting channels increases the intensity of shear strain that is known to be conducive to a more fine-grained structure.

Supply device, curved needle with a broken axle, the geometry of which coincides with the geometry axis intersecting channels of the container and matrix, as well as the mandrel allows you to obtain the proposed method long hollow rods. When this pot keeps the needle from the tilt axis at the initial stage of pressing, when the metal arrives at the output, i.e. the second channel matrix. After the metal will completely fill the output channel matrix, its pressure pot slips from the end of the needle, and the alignment of the axes of the needle and the channel and, therefore, ravnoudalennostj walls of the compression of the hollow rod is provided by the metal.

The implementation matrix in the form of two volumetric allows the Assembly of the device before pressing, i.e. insert the needle with a broken axis in intersecting channels of the matrix, and the integrity of the matrix in the process of pressing is achieved by fastening volumetric bandage.

In addition, the implementation matrix VI is e two volumetric simplifies the manufacturing technology of the intersecting channels in it.

Rigid fastening of the upper end of the needle with the cross member allows you to set the needle in the intersecting channels of the container and the matrix so that the axis of the needle and the channels were the same, and the cross member holding the needle from moving in the pressing process.

The invention is illustrated by the following illustrations:

figure 1 shows the diagram of a device for pressing the solid bars;

figure 2 - diagram of the device for pressing the solid rods of high-ductility metals in three overlapping channels;

figure 3 - diagram of the device for pressing the hollow rods (the initial stage of the process);

figure 4 - diagram of the device for pressing the hollow rods (steady-state stage of the process).

The device in figure 1 consists of a container 1 with the attached matrix 2, which is the matrix for direct extrusion and equal channel angular pressing, i.e. in which the channels for direct and equal channel angular pressing. The diameter of the container is much greater than the diameter of the channel in the matrix (D, d), a calibrating area direct extrusion combined with one of the intersecting channels of equal-channel angular pressing. The device also contains the punch 3 and the press-washer 4.

In the container fits the workpiece 5. For processing hard metal is low, require to deform elevated temperatures, the device can be equipped with heating elements 6.

The method is carried out in this device, which works as follows. After you install the device at a press container 1 fits the workpiece 5 and press the washer 4. Punch 3, which moves the working body of the press is pressing the workpiece, i.e. the metal is extruded from the cavity of the container 1 power P through the hole in the matrix 2, as shown in figure 1. When the workpiece while the output of the calibrating zone direct extrusion is subjected to equal channel angular pressing with shear deformations.

To increase the intensity of shear information, in the case of treatment of highly ductile metals, equal channel angular pressing is carried out in three overlapping channels for this device is installed in the corresponding matrix 2 (figure 2).

For the manufacture of hollow rods of the device is provided with a needle 7 and the frame 8 (Fig 3). The upper end of the needle is rigidly connected with the cross member 9, for example by means of wedge 10. The cross member rests on the wall of the container 1. The needle 6 is made with a broken axle, the geometry of which coincides with the geometry of the axis of the container and intersecting channels in the matrix. The axis of the needle and container combined by centering on aracini 9 using the ledge on the diameter of the inner hole in the container, as shown in figure 3.

The plug 3 is made of a Central hole through which passes the needle 6, and the slot 11, through which passes the cross member 9. The diameter of the Central hole in the plug slightly larger than the diameter of the needle 6, and the width of the slot 11 is slightly greater than the width of the cross bar, allowing the plug to move relative to them and to carry out the pressing of the workpiece 5. Matrix 2 consists of two identical (mirrored) halves that are bonded monolithic ferrule 12 and attached to the container 1, for example, using screws (not shown).

The mandrel 8 is inserted into the output channel of the matrix 2 and mounted on the lower end of the needle 6, as shown in figure 3.

During the extrusion of hollow rods, the device operates as follows (figure 3). Initially meets the matrix with the needle. For this purpose the lower end of the needle 6 (3) fits into the channel (half channel) one of polymetric 2. This volumetric overlaps the second polimetrica and they are pressed into the ferrule 12 (landing interference). Then, the matrix, seated needle 6, together with the yoke attached to the container 1, for example, using screws, and the Assembly is installed on the press. To the working body of the press (the slider or movable traverse) is attached to the punch 3.

Further, in the container 1 fits the workpiece 5, the upper end of the needle 6 passes through squoze the hole in the workpiece. The workpiece is placed, a press washer 4, which also has a through hole, through which the upper end of the needle 6. In the container is lowered, the punch 3 to contact the lower end surface of the press plate 4, the upper end of the needle passes through the Central hole in the plug. The slot punch is inserted into the cross member 8, the upper end of the needle passes through the hole, and the cross member is aligned with the lower ledge on the inner surface of the container. Thus combines the axis of the needle, the container and intersecting channels of the matrix.

The needle is rigidly fixed to the cross member, for example, by means of the wedge 10. The mandrel 8 is inserted into the output channel matrix and is worn on the lower end of the needle, as shown in figure 3.

When moving the punch 3 and the workpiece 5 is exposed to direct pressing, i.e. is extruded from the cavity of the container 1 into the gap between the working surface of the matrix and needles. This metal is initially deformed (compressed) in the conical zone of the matrix and enters the calibrating zone, whose height h is 4-10 mm (figure 1). Calibrating the direct extrusion combined with one of the intersecting channels of equal-channel angular pressing. Therefore, after the passage of the calibrating zone metal immediately subjected to shear deformation (equal channel angular PR is savanyu). In the second intersecting channel matrix metal is uneven (first in the upper part of the channel, and then at the bottom, and this specificity equal channel angular pressing), which may lead to withdrawal of the needle tip with the axis of the channel and lead either to failure or to unequal wall thicknesses obtained by the press articles, i.e. to marriage. The mandrel 8 keeps the needle from withdrawal. After filling the metal part of the second intersecting channel matrix (figure 3) under the action of its pressure pot slips from the end of the needle and pressing process continues (figure 4). While the needle is held on the axis of the channels within the metal.

After pressing in the container is laid next the workpiece and the process repeats.

An example implementation of a method and device for its implementation.

Example 1. Billet aluminum AD1 diameter D=80 mm and height HC=120 mm was covered with grease ROSOL-SHOCK and fit to the container for pressing diameter D=82 mm and height H=150 mm (figure 1). The conical section of the matrix 2 was performed with an angle γ=110°. The diameters of calibrating belt and intersecting channel for CMR-pressing was set to d=10 mm, the Angle of intersection of the channel matrix for CMR-pressing ϕ=30°. While calibrating the belt channel direct extrusion combined with one of the intersecting channels of the CMR-pressing, and the honeycomb h calibrating the belt is equal to 6 mm, i.e. the friction surface, and hence the friction force during pressing is reduced to the possible minimum value. On the blank fit press-washer 4 of plastic material (copper MO) with a thickness of 15 mm, the Device was mounted on a hydraulic press with a nominal power of 2.5 MN and was pressing. Received a rod with a diameter of 10 mm and a length of 7.5 meters. Microstructural studies showed that the average grain size in the rod equal to 1.2 μm.

Example 2. In this device, the matrix 2 was replaced by a matrix with three intersecting channels, as shown in figure 2. The channel diameter d=10 mm

The original billet of copper M1 with dimensions as in example 1 was covered with grease ROSOL-SHOCK (the same grease smeared and the inner surface of the container and the channel matrix) and extruded on the hydraulic press. The resulting rod with a diameter of 10 mm and a length of 7.5 meters with an average grain size of 1.0 μm.

Example 3. Used the same container, but the matrix was replaced by a matrix that is made in the form of two volumetric 2 with a diameter intersecting channels d=20 mm (Fig 3). In channel one volumetric fit curved needle with a diameter of dand=12 mm For the first volumetric superimposed second polimetrica and this Assembly was zapressovyvat in the holder 12. The matrix was attached to the container by screws (not shown) and the device, the mouth of which was aliwalas on the table hydraulic press. The punch, which were made the Central hole with a diameter of 13 mm and a slot width 45 mm, were fixed on the walking beam of the press.

In the container fit the billet of copper M1 with an outer diameter of 80 mm and a height of 120 mm, which was done through hole with a diameter of 12.5 mm At packing container blank is worn on the needle. On top of the workpiece was placed press washer 4 of plastic material (aluminum AD1), which was attached to the needle. Down the punch 3, which consisted in the opening of the container to contact with the press plate 4, and the needle passed through the Central hole made in the end face of the punch.

The slot punch is inserted cross-bar 9, which was attached to the needle and centered the lower ledge on the inner surface of the hole in the container. The needle 6 was fixed relative to the cross member 9 of the wedge 10. In the output channel of the matrix 2 was inserted into the mandrel 8 and was put on the end of the needle with a slight interference fit.

When pressing the resulting tube with an outer diameter of 20 mm, the inner 12 mm and a length of 3 meters. We used lubrication recoil-SHOCK, which is deposited on the workpiece, the needle, the inner surface of the container and on the channels of the matrix.

Microstructural studies revealed that the average grain size equal to 0.8 microns.

Thus, proposed the s of the invention can be obtained by pressing of long products with crystalline and nanostructure, with high mechanical properties.

1. The method of extrusion of metals, including the implementation of one technological operation of two types of pressing, as one of them using equal-channel angular pressing, providing metal shear deformation, characterized in that as the second pressing use direct pressing of metal from the container to exit through the calibrating zone, which is carried out before the equal channel angular pressing, deformation of the shear equal channel angular pressing immediately provide at the output of the metal of the calibrating zone direct compression.

2. The method according to claim 1, wherein during the extrusion of highly ductile metals equal channel angular pressing is carried out in three overlapping channels.

3. The method according to claim 1 or 2, characterized in that it is used to produce hollow profiles of the workpiece with a through hole.

4. Device for pressing of metals containing a punch and die with the two intersecting channels, one of which is vertical and is made with the lead-in part having a cross sectional area exceeding the cross-sectional area of a vertically positioned channel, characterized in that it has placed on the matrix pin is inera, the cavity which forms a lead-in portion of a vertically positioned channel matrix, which is made in the form of gage is used for direct extrusion of metal from the container, these calibrating the belt has a height, component 4-10 mm, and a diameter equal to the diameter of the second channel matrix.

5. The device according to claim 4, wherein during the extrusion of highly ductile metal matrix provided with a third channel for angular pressing in three overlapping channels.

6. The device according to claim 4 or 5, characterized in that during the extrusion of metals to produce hollow profiles, such as a pipe, it is equipped with a locking pin and needle, made with a broken axle and rigidly connected to the upper end of the strut, whereby the needle is installed with the software matches its broken axis with the axes of the container and intersecting channels of the matrix, the punch is made with a Central hole for the needle and cut for the cross member and is mounted for movement relative to them, the mandrel is located in the output channel matrix and mounted on the lower end of the needle with the possibility of slippage with the needle under the action of the compression of the metal matrix made in the form of two volumetric fastened by means of the bandage.



 

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20 cl, 12 dwg

FIELD: metallurgy.

SUBSTANCE: invention refers to metal treatment under pressure and can be used at forging of blanks fabricated out of nickel base alloys, super alloys including. A forging press with stamping alloy forging dies is used for this purpose. The blank made out of a super alloy is heated to a temperature within range of approximately 1850°F up to approximately 1950°F. Forging dies made out of a nickel base alloy are heated to a temperature within range of approximately 1500°F up to approximately 1750°F. The blank is then placed between dies and forged. As a result a forged item is produced. A blank out of a packed powdered alloy on nickel base and dies out of a super alloy on nickel base are used for production of a half finished component of a gas turbine engine. The blank and the dies are heated to the above mentioned temperatures. Forging is carried out at an open air at a nominal deformation rate exceeding approximately 0.02/sec.

EFFECT: increased efficiency.

15 cl, 3 dwg

FIELD: metallurgy.

SUBSTANCE: forging is performed in several passes by means of an upper flat and a lower cut out strikers. The lower striker has an impression in a shape of a scalene triangle. During the first pass a blank by compression is shaped into a scalene triangle with an obtuse angle 100-105° and a lesser acute angle 29-34°. During the following passes the blank is placed in the same strikers with support of a lesser side of the triangle of its cross section on a bigger side of a scalene triangle of cross section of the impression of the lower striker.

EFFECT: risk of defect formation is excluded.

12 dwg, 6 ex

FIELD: plastic working of metals, possibly local strengthening of hollow and solid blanks of axially symmetrical parts of iron-base mean- and high-alloy steels and alloys.

SUBSTANCE: method comprises steps of plastically deforming blank rigidly fastened between clamps and heated till temperature no less than phase conversion ending temperature and no more than recrystallization starting temperature due to rotating at least of one clamp. Deformation is realized at rate and deformation degree sufficient for providing dynamic recrystallization processes but not causing stability loss at plastic deformation related to energy dislocation. Deformation is performed near peripheral layer of blank. Due to dynamic crystallization maximally possible grain size disintegration in near-surface region is achieved and gradient structure is created along cross section and length of blank.

EFFECT: improved physical and mechanical properties in near-surface of blank, lowered cost of strengthening process.

7 cl, 1 dwg, 1 ex

FIELD: metallurgy, possibly production of homogenous fine-grain titanium material.

SUBSTANCE: according to first variant of invention method comprises steps of first heat treatment of blank of titanium material due to heating it till β-region; quickly cooling blank till (α + β)-region and forging it while creating at deforming process super-plasticity condition; then performing second heat treatment due to realizing recrystallization annealing for producing grain size in range approximately from 5 micrometers till 20 micrometers. According to second variant of method blank of double-phase titanium material is subjected to first heat treatment due to heating it till β-region. Heating temperature is in range approximately from 600°C till approximately temperature of polymorphous phase conversion of titanium material. Blank is quickly cooled till (α + β)-region and it is subjected to forging while creating super-plasticity condition. Then second heat treatment is realized due to performing recrystallization annealing. In the result double-phase material with grain size 15 - 20 micrometers is produced.

EFFECT: possibility for producing material that may be subjected to ultrasound flaw detection at high accuracy.

14 cl, 8 dwg, 3 tbl, 5 ex

FIELD: metallurgical industry branch, possibly different operations of plastic working of metals.

SUBSTANCE: method comprises steps of applying to blank pulses of electric current during plastic working. Pulses of electric current of predetermined intensity, duration and repetition frequency are supplied to blank at rolling by means of rolls rotating mutually opposite, at drawing by means of draw plates, at forming by means of deforming tool, at flattening between deforming cylinders rotating mutually opposite or at flattening in standing-wave mode between blocks driven to rocking motion due to ultrasound action. At rolling, drawing or forming, pulse repetition frequency is determined according to given formula; at flattening frequency corresponds to or it is multiple to frequency of ultrasonic oscillations set by ultrasound generator in predetermined frequency range.

EFFECT: improved efficiency, physical and mechanical properties of metal.

19 cl, 10 dwg

FIELD: plastic working of metals, possibly forging blanks of nickel base super-alloy.

SUBSTANCE: method is realized with use of forging press with forging die sets of nickel base super-alloy having yield limit no less than stress of plastic yielding of super-alloy at forging for making forged pieces at temperature range approximately from 926.67°C till approximately 1010.00°C at nominal deformation rate. Blank for forging and die sets are heated till said forging temperature. Forging is realized at such temperature and at nominal deformation rate. Nickel base super-alloy selected from group of alloys may be used as material of forged blank. According to one variant of invention blank of compacted powder of nickel base super-alloy is used for forging. In such case die sets are made of nickel-base super-alloy containing, mass%: aluminum, approximately 5 - 7%; molybdenum, approximately 8 - 15%; tungsten, approximately 5 - 15%; magnesium, near 140 ppm; nickel and impurities, the balance.

EFFECT: lowered costs for producing forged pieces of super-alloy with desired properties.

15 cl, 3 dwg, 2 tbl

FIELD: plastic working of metal, possibly forming on inner surface of tubular blanks with bottom multi-stat helical riffles of mutually opposite directions at manufacturing fragmentation type envelope of ammunition.

SUBSTANCE: riffles form grid of rhombic protrusions. In order to form such riffles, tubular blank is reduced by two successive operations. At each operation tubular blank and punch with helical protrusions are together pulled through sizing die. Each operation is realized at least during two transitions while punches whose length is multiply less that length of blank are used. Common pulling through of blank and punch during first transition of each reduction operation is realized while punch rests upon bottom of blank. Between transitions at each reduction operation punch is unscrewed from blank with formed helical riffles for forming between punch and blank band of engagement of helical protrusions of punch and helical riffles of blank. Said band is used at next reduction transition for resting punch and for providing desired direction of formed helical riffles.

EFFECT: enlarged functional and manufacturing possibilities of method.

5 dwg

FIELD: plastic working of metals, possibly manufacture of blanks designed for producing hollow thin-wall articles such as aluminum tubes, bottles.

SUBSTANCE: method comprises steps of feeding initial predetermined-size material to pressing machine having working units. In said working units initial material is subjected to successive parametric pressing by transitions. Pressing is realized at speed directly proportional to specific pressure of pressing process according to relation: Vt = KPt where Vt -parametric pressing speed at time moment t; Pt - specific pressure of pressing process at time moment t; K = (Pend - Pst)tk - proportionality coefficient; Pend - specific pressure at pressing process termination; Pst - specific pressure at pressing process starting; tk - time period of pressing process.

EFFECT: improved quality of blanks, enhanced efficiency of production of ready articles.

2 cl, 1 dwg

FIELD: pressure shaping; manufacture of blanks from materials at preset structure including submicro-crystalline structure and nano-crystalline structure at respective level of physico-mechanical properties.

SUBSTANCE: proposed method consists in successive deformation cycles of initial blank by compression in height, thus obtaining blank with lateral faces. Proposed method ensures smooth plastic flow of material of blank in opposite directions along axis perpendicular to direction of application of deformation force. Each deformation cycle includes placing the blank in device, subjecting it to deformation, withdrawing the blank from device and re-setting for next cycle. Device proposed for realization of this method has working part with cavity and upper and lower punches. Working cavity consists of two parts: upper and lower. Lower part is widened along one of its horizontal axes.

EFFECT: enhanced homogeneity of ultrafine-grained structure at improved mechanical properties.

9 cl, 4 dwg, 1 tbl, 1 ex

FIELD: construction equipment.

SUBSTANCE: rod ends are made with thickenings which have screw. For rods joining joiner is used with inner screw. Thickenings on rod ends are received on forging press fitted with equipment for cold heading of reinforcing rod ends. As stated device for disembarkation forging die is used, having longitudinal channel along the length for operation security with long reinforced rods.

EFFECT: provision of process capability widening of used equipment with serviceability and economic feasibility preservation.

20 cl, 12 dwg

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