Production of bars and thin wires from titanium-nickel system alloy with shape memory effect

FIELD: process engineering.

SUBSTANCE: set of invention relates to production of thin bars and wires with shape memory effect and superplasticity from alloys of nickel-titanium system to be used in aircraft engineering, radio electronics, medicine, etc. Proposed method consists on production of the alloy with shape memory effect. Bar-like blank is made from said alloy by compaction or helical rolling and heated to make the bar by rotary swaging in several steps to required size with intermediate heating between swaging steps. Blank is heated before rotary swaging to 300-500°C. Method of alloy production for further making of the bar consists in facing the high-strength graphite crucible walls and bottom by nickel plates. The rest mix is placed inside the crucible to fuse in vacuum induction furnace. The melt is held, teemed in vacuum into chill mould and cooled down to get the ingots. Thereafter, electrode is made from obtained ingots or from bard produced from said ingots. Electrode material is subjected to electron beam smelting in vacuum of at least 5x10-3 Hg mm to form the ingot in copper casting mould.

EFFECT: wire production from bar by hot or cold drawing.

9 cl, 2 tbl

 

The group of inventions relates to techniques for the production of thin rods and wire, with the effect of "memory" shape and sverkhuprugost from alloys of the Nickel-titanium with "memory effect" forms used in aviation, electronics, medicine, aerospace engineering, mechanical engineering and other engineering fields.

The alloys of the Nickel-titanium, the relevant area is the existence of intermetallic Ni-Ti stoichiometric composition (from 46 to 58 weight percent Nickel, the remainder mainly titanium), as well as ternary alloys described by formulas TiNixCo1-x, TiNixFe1-x, TiNixCu1-x, TiNixV1-xand TiNixCr1-xwhere x is a coefficient varying from 0 to 1, have, in addition to the effect of "memory" shape, a unique complex of physical and mechanical properties and are widely used in various fields of technology and medicine.

A method of obtaining a wire made of alloys with shape memory Nickel-based and titanium, providing, in particular, processing of the alloy with the "memory" shape with the stages of cold working and low-temperature annealing without re-compression (EP 0143580 A1, 22F 1/00, 05.06.1985).

Although the known method and eliminates the deformation of the product in the perpendicular direction, as the wire remains low.

The closest to the invention is the way I get bars of the alloys of the Nickel-titanium with shape memory effect, under which create an alloy with shape memory effect, made of alloy by extrusion or produced by cross-helical rolling semi-finished products in the form of rods, heat them to a temperature of 450 to 950°C and is made from semi-finished bars and rods, rotary forging; and a method of obtaining a wire from the alloys of the Nickel-titanium with shape memory effect, according to which the rods are made by the above method and used for production of wire warm or cold drawn bars (EN 2162900 C1, published. 10.02.2001).

The amount of the carburizing metal smelting is 0.02 to 0.05%. The nitrogen content in the alloy does not exceed 0.01%. The hydrogen content in the alloy does not exceed 0,008%. The oxygen content in the alloy does not exceed 0.15%. The minimum diameter of the obtained wire of 0.1 mm Under cyclic loading obtained rods and wire the number of cycles to failure is 5000-7000.

The objective of the invention is obtaining industrially fabricated alloys with shape memory based on titanium nickelide, in particular thin rods and thin wire with improved mechanical properties and improved functional properties, such as cyclic durability under high loads, a high degree of recovery after the application of high load (low residual deformation after Mgr who supply the increased load), increased flexibility.

The technical result, provides solution to this problem is to increase the cyclic durability of rods and a wire from the specified alloy, reduction of residual deformation after the application of high loads and providing the possibility of finer wire.

The technical result is achieved by a method of producing rod of the alloy system Nickel-titanium with shape memory effect, characterized by the fact that made from alloy system Nickel-titanium with shape memory effect by pressing or produced by cross-helical rolling the workpiece in the form of a rod, which is then heated and subjected to a rotary forging in several stages to the desired size with the degree of deformation of 5-25% at each stage with intermediate heating of the workpiece between stages of forging, the heating of the workpiece before rotary forging and intermediate heating is carried out until the temperature of 300-500°C for 30-180 minutes, and after reaching the total deformation 40-90% between stages of forging carry out additional annealing the workpiece at a temperature of 300-500°C for 30-180 minutes.

The achievement of the technical result contribute to special cases of the method:

- when receiving a rod with a diameter of 20-40 mm heating billets before rotary forging and intermediate heat undertake Aut in electric chamber furnace for 30-180 minutes;

- upon receipt of rods with a diameter of 1.6-20 mm heating billets before rotary forging and intermediate heating is carried out in an electric chamber furnace for 30-120 minutes, and the flow of heated workpieces on a rotary forging is carried out through a tubular furnace with the temperature of the workpieces 300-500°C.

The technical result is also achieved by a method of obtaining a wire of an alloy system Nickel-titanium with shape memory effect, according to which receive the rod of the alloy system Nickel-titanium with shape memory effect of the above method and put his warm or cold drawing.

The achievement of the technical result contribute to special cases of the method:

- upon receipt of the wire is cold drawn bars carry out intermediate annealing at a temperature of 200-500°C for 0.05 to 30 minutes;

- when receiving wire warm lug wire heating before Molokai spend up to 200-500°C;

- for drawing a wire diameter of 0.4-4.0 mm use fibrous carbide with angle 2α, equal 6-12 degrees, and the length of the calibration zone portages 40-70% of the diameter of the portages;

- for drawing wire diameter of 0.02 to 4.0 mm use rummaging of monocrystalline diamond with angle 2α, equal 6-12 degrees, and the length of the calibration zone portages 30-80% of the diameter of the drawing dies.

The set task is solved by the fact that that rotary forging (RK) at low temperatures of 300-500 degrees, with a low temperature anneal (300-500°C for 30-120 min) between the accumulated deformation up to 90% and in the final stage allows to obtain a homogeneous ultrafine-grained uniform in cross section the structure of thin rods. This provides a complex high mechanical characteristics and functional properties of semi-finished products, in size and volume suitable for the manufacture of semi-finished products of smaller sizes, or finished products for medicine, robotics, oil and gas industry and the aerospace industry. Further drawing at low temperatures of 200-500°C With a low temperature anneal (200-500°C for 0.05 to 30 min) between the accumulated deformation up to 90% ensures the preservation and improvement of the resulting structure and properties. The application tool (fiber) with a specific geometry allows to obtain the thinnest wire diameter to 0.020 mm, possessing all of these properties. Wire of such size and properties are indispensable in the mini-structures and devices. The use of the alloy obtained using the improved scheme double vacuum melting, vacuum induction (VIP) and electron beam (ERF), significantly reduces the content of impurities in the alloy and has a positive impact on the CEC is practical durability.

Obtaining alloy system Nickel-titanium with the effect of "memory" was performed as follows.

As a source of raw materials (batch) for the production of ingots in vacuum induction furnaces used:

- titanium sponge stamps TG-100, TG-110 according to GOST 17746-79;

the leaves of titanium VT1-00; VT1-0 according to GOST 22178-76 (or scraps of sheet, cut describe not gas-induced welding);

- todeny titanium;

Nickel primary brand H0; No; H1 GOST 849-70.

The weight of the charge produced on the electronic precision balances with readability weighing 0.1 gram, which allowed precisely to ensure that the calculated chemical composition of the remaining process parameters.

When laying the charge in the crucible used the original plates of the walls and bottom of the crucible Nickel plates (for example, Nickel cathodes, chopped a squaring shear) and bookmark the rest of the charge inside this Nickel basket. Melting begins at a vacuum of 10-2-10-3mm RT.article After melting of the entire mixture, the melt was passed prior to the casting of 1-30 minutes. Casting was carried out in vacuum at a temperature of 1250-1580°C in a steel or cast iron, or graphite molds (can be used as a detachable and permanent mold).

Next, as a feedstock for ingot production in electron-beam multi-chamber furnace used is ovali:

the ingots obtained in vacuum induction furnaces (machined), welded to the electrodes;

- bars and rods obtained from ingots vacuum-induction melting rolling on PVP mills or pressing (machined), welded to the electrodes.

For the electrode selected ingots vacuum induction melting (VIM) from the same series heats (specified chemical composition) or rods obtained from ingots vacuum-induction melting of a series of heats. Products (ingots, bars) were subjected to mechanical treatment in order to remove oxides and surface toxins and impurities to clean the surface. The diameter billets were chosen depending on the mould (is 50-170 mm), the length of the electrode was chosen sufficient to obtain full ingot suitable for subsequent processing (1000-2200 mm). To obtain an electrode of the desired length of the workpiece was welded between the welding in argon.

Melting started at a vacuum of 2×10-5mm RT.article Casting time depends on the length of the electrode and the feeding speed of the electrode. The feed rate of the electrode was chosen optimal for the formation of a good bath melt and the formation of the ingot and varied in the range from 1.5 mm/min 150 mm/min Average time for melting of the electrode with a diameter of 60-70 mm and a length of 1500-2200 mm 1.5-3.5 hours. Working vacuum depending on the speed of melting and gases in the remelted metal was not less than 5×10 -3mm RT.article The ingot formed in the copper water-cooled crucible diameter 65-200 mm

Electron-beam remelting (ERF) is the fusion of the original billet (ingot, rod) in vacuum and subsequent crystallization. The main mechanism of refining metals in vacuum is the evaporation of volatile metallic impurities and removal of volatile oxides of CO and CO2or volatile oxides of metals having a higher vapor pressure than that of molten metal.

All this allows to fully and quickly cleaned from impurities and to obtain a good homogeneity of the ingot, metal high quality from the point of view of the microstructure of the ingots and gas. Deviations of the obtained Nickel content from the estimated range of ±0.1%. The carbon content of the alloy does not exceed 0.01%. The hydrogen content in the alloy does not exceed 0.003 per cent. The oxygen content and total nitrogen in the alloy does not exceed to 0.032%.

These characteristics ingots provide alloys with temperature phase transformations, satisfying certain properties of the final product or semi-finished products with improved functional properties compared with those obtained by traditional methods. Reducing the level of impurities in comparison with the closest analogue: carbon from 0.05% to 0.01%, water is kind of from 0.008% to 0.003%, oxygen from 0.15% to 0.03% and nitrogen from 0.008 to 0.002% - improves functional properties obtained from ingots semi-finished products (bars, rods, wire) in 1,5-2 times (during cyclic loading of the wire element (strain 5%) - number of cycles to failure increases with 5000-7000 up to 10000-15000).

The way to get rod of the alloy system Nickel-titanium was carried out as follows.

1. Receiving rods by extrusion method.

Rods with a diameter of 20-50 mm was obtained by extrusion of a pre-deformed preform diameter 85-200 mm Workpiece received from an ingot by pieces of sprue on the cutting machine and grinding the surface of the ingot on a lathe to remove all surface defects such as gas porosity, surface cracks, etc). The billet was heated in furnaces or induction furnaces to a temperature 800-1020°C. Before heating the workpiece daubed with grease (stilografica, talc and so on). The pressing was carried out in 2-4 transition depending on the initial diameter of the workpiece. On the first transition, the hood does not exceed 3, and the latter could reach 30. Pressing speed does not exceed 35 mm/sec.

2. Getting the bars method PVP (produced by cross-helical rolling).

Produced by cross-helical rolling allows you to get the rods in diameter 8-160 mm directly from an ingot. The ingot was cut off the sprue, and the ingot was ground on what to remove surface defects. Rolling is as follows:

- heating the ingot in a furnace to a temperature of 750 to 1000°C;

- rolling the ingot in several steps (passes) with the degree of deformation at each iteration 5-25%, with intermediate heating between the passages to the desired size.

Extruded or rolled billets in the form of rods with a diameter of 8 to 40 mm after machining were subjected to deformation at three to six rotary forging machines of different capacity for receiving the wire workpiece or thin rod.

Rods with a diameter of 20-39 mm were obtained from extruded or rolled blanks on a rotary forging machine of great power. The billet was heated in an electric furnace to a temperature of 300-500°C for 30-180 min, followed by forging, deformation 5-25% on each transition (stage) to the desired size. Between transitions produced intermediate heating of the workpiece to the same temperature. If the total strain reached 40-90%, between transitions produced annealing in an electric furnace at a temperature of 300-500°C for 30-180 minutes

Rods with a diameter of 1.6 to 19 mm received on a rotary forging machines (RCM) medium and low power. The billet was heated to a temperature of 300-500°C for 30-120 min in an electric furnace, after which it was carried out by forging in several steps (transitions) "passthrough" heat directly is when feeding the workpiece in a rotary forging machine in a tubular furnace or in a tubular electric furnace, installed in front of a rotary forging machine, to a temperature of 300-500°C. with a deformation 5-25% on each transition to the desired size. If the total strain reached 40-90%, between transitions produced annealing in an electric furnace at a temperature of 300-500°C for 60-180 minutes

The resulting rods are not only intermediate preform for drawing, but the finished product is a thin rod. Surface quality provide the use of a special tool (finishing jaunty - have longer working surface in contrast to working Boykov and grinding rods for centerless grinding machine. The resulting rods have compared with bars and rods obtained in a known manner (EN 2162900) enhanced functional properties - in particular, the tensile strength increases from 800 MPa to 1300 MPa, and the elongation increases from 5% to 25%. The residual strain after loading 5 cycles (with warp 6%) decreases from 1% to 0.3%.

The method of obtaining a thin wire made of an alloy system Nickel-titanium was carried out as follows.

The wire from the alloys of the Nickel-titanium diameter of 0.40-4.0 mm was obtained from intermediate pieces - rod, obtained as described above, the method of warm-drawn or cold-drawn line drawing of two single-mills. The wire is emetrol 0,020-0.40 mm was obtained by the method of warm or cold-drawn line drawing of two Chestertown mills. When using the method of cold drawing used intermediate annealing at temperatures of 200-500°C for 0.05 to 30 minutes

As lubrication during cold drawing used graphite brand CLS with the addition of 1.0 to 3% of soap powder or synthetic grease. When the warmth of the drawing used "aquadag" (colloidal solution of graphite in water).

When the warmth of the drawing, the heating wire before Molokai carried in slotted dual-zone electric furnace with a length of 1.5-2.0 m up to temperatures of 200-500°C. the Temperature in the zones regulated independently, allowing input to set a higher temperature to ensure uniform heating wire according to the technological regime. Drawing with a diameter of 4.0 to 2.5 mm led with a step of 0.3 to 0.15 mm, with a diameter of 2.5 to 1.5 mm - 0.25-0.10 mm; diameter of 1.5 to 0.4 mm in increments of 0.20-0.05 mm; diameter of 0.4 to 0.1 mm in increments of 0.15-0.01 mm, with a diameter of 0.1 to 0.020 mm increments 0,009 is 0.001. Speed drawing depending on the diameter and chemical composition of the wire is regulated in the range from 0.01 to 1.3 m/sec.

For drawing wire diameter 4-0,4 mm used drawing dies made of hard alloys (VK, VK) with angle 2α, equal 6-12 degrees, and the length of the calibration zone portages equal to 40-70% of the diameter d of the drawing dies (GOST 9453-75).

For drawing a wire diameter of 0.4-0,020 mm use portages from monocrystal tolerance on dia is true from -0,0020 mm to -0,0004 with angle 2α, equal 6-12 degrees, and the length of the calibration zone portages equal to 30-80% of the diameter d of the drawing dies.

This technology allows to obtain thin wire made of alloys with shape memory based on Nickel-titanium diameters to 0.020 mm, This wire is widely used as an Executive member in the actuators and mini devices. One of the main requirements for these devices is high cyclic fatigue. The wire obtained by the proposed method, resists deflection 8% - more than 10×6 times before destruction, which is more than an order of magnitude higher in comparison with wire obtained in a known manner (EN 2162900).

Compliance with the requirements on the technology of wire from the alloys of the Nickel-titanium provides a high level of service properties - degree of recovery (100% deformation up to 15%), corrosion resistance, wear resistance, biocompatibility, damping and mechanical properties. The choice of the chemical composition of the ingot and the subsequent compliance with certain technological operations procedure, alternating warm and cold rolling to the final stage allows you to get the wire as close in properties to the end product, and in some cases being as such.

Below is an example embodiment of the invention.

The source material for receiving the rods is vialis three hot-deformed steel bar with a diameter of 20 mm NiTi alloy (Ni=55,0% weight), received:

1. From an ingot of a single vacuum-induction melting rolling mills PVP at a temperature of 1000°C (in a known way).

2. From an ingot by vacuum-induction melting and subsequent electron-beam remelting rolling mills PVP at a temperature of 1000°C (the proposed method).

3. From an ingot by vacuum-induction melting and subsequent electron-beam remelting rolling mills PVP at a temperature of 1000°C (proposed method.

The rods 1 and 2 on the following stages in such hot temperatures to +750°C on a rotary forging machines up to a diameter of 2.8 mm and then by hot drawing at temperatures to +650°C receive a wire diameter of 0.4 mm (Temperature, as in the known method is higher than that in the proposed method.)

The rod 3 in the following steps, in accordance with the proposed method are forged at a temperature of +400°C on a rotary forging machines up to a diameter of 2.8 mm with intermediate anneals at a temperature of +400°C for 2 h Anneals were done after accumulation of deformation between the passages 60%. Next was pulling at a temperature of +400°C up to a diameter of 0.4 MM with intermediate anneals at a temperature of +400°C for 2 h Anneals were done after accumulation of deformation between the passages 70%.

Samples of the wire diameter of 0.4 mm was obtained from all three rods were subjected to annealing before ispytaniyami a temperature of 450°C for 30 minutes

The wire obtained from rod 3, with a diameter of 0.4 mm was further pulling on the six mills drawing on the portages of the single-crystal diamond with angle 2α, equal to 6 degrees, and the length of the calibration zone portages, equal to 50% of the diameter d of the drawing dies (GOST 9453-75) at a temperature of +300°C up to a diameter 0,020 mm with intermediate annealing: at a temperature of +350°C for 30 minutes after the accumulation of deformation between the passages 80% (up to a diameter of 0.18 mm), next at a temperature of +300°C for 20 min after accumulation of deformation between the passages 90% (up to a diameter 0,057 mm), the next at a temperature of +250°C for 10 min after the accumulation of deformation between the passages 88% (up to a diameter 0,020 mm). The wire sample was subjected to annealing +300°C for 0,05 min

Comparative data on percentage of impurities in bars, obtained by various methods of smelting, are given in table 1.

Comparative data on mechanical and functional properties are shown in table 2.

Thus, the proposed method of producing semi-finished products can significantly improve the mechanical and functional properties of thin rods and wires of alloys with shape memory based on titanium nickelide and use them for production work items and parts in devices that are structurally limited in size and weight, but requires elevated service is the features. This is especially true for ministrators and products used in medicine.

1. The way to get rod of the alloy system Nickel-titanium with shape memory effect, characterized by the fact that made from alloy system Nickel-titanium with shape memory effect by pressing or produced by cross-helical rolling the workpiece in the form of a rod, which is then heated and subjected to a rotary forging in several stages to the desired size with the degree of deformation of 5-25% at each stage with intermediate heating of the workpiece between stages of forging, the heating of the workpiece before rotary forging and intermediate heating is carried out until the temperature of 300-500°C for 30-180 minutes, and after reaching the total deformation 40-90% between stages of forging carry out additional annealing the workpiece at a temperature of 300-500°C for 30-180 minutes.

2. The method according to p. 1, characterized in that when receiving a rod with a diameter of 20-40 mm heating billets before rotary forging and intermediate heating is carried out in an electric chamber furnace for 30-180 minutes.

3. The method according to p. 1, characterized in that when receiving rods with a diameter of 1.6-20 mm heating billets before rotary forging and intermediate heating is carried out in an electric chamber furnace for 30-120 minutes, and the hearth is the heated workpiece on the rotary forging is carried out through a tubular furnace with the temperature of the workpieces 300-500°C.

4. The method according to p. 1, characterized in that use alloy system Nickel-titanium with shape memory effect obtained by vacuum-induction melting and subsequent electron-beam melting.

5. The way to obtain a wire of an alloy system Nickel-titanium with shape memory effect, characterized in that the alloy system Nickel-titanium with shape memory effect the method according to any of paragraphs.1-4 receive the rod, which is subjected to warm or cold drawing.

6. The method according to p. 5, characterized in that in the manufacture of wire cold drawn bars carry out intermediate annealing at a temperature of 200-500°C for 0.05 to 30 minutes.

7. The method according to p. 5, characterized in that when receiving wire warm lug wire heating before Molokai spend up to 200-500°C.

8. The method according to p. 5, characterized in that for drawing a wire diameter of 0.4-4.0 mm use fibrous carbide with angle 2α, equal 6-12 degrees, and the length of the calibration zone portages equal to 40-70% of the diameter of the drawing dies.

9. The method according to p. 5, characterized in that for drawing wire diameter of 0.02 to 4.0 mm use rummaging of monocrystalline diamond with angle 2α, equal 6-12 degrees, and the length of the calibration zone portages equal to 30-80% of the diameter of the drawing dies.



 

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1 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: superalloy has the following composition, wt %: 1,3%≤Al≤2.8%, trace amounts ≤Co≤11%, 14%≤Cr≤17%, trace amounts ≤Fe≤12%, 2%≤Mo≤5%, 0.5%≤Nb+Ta≤2.5%, 2.5%≤Ti≤4.5%, 1%≤W≤4%, 0.0030%≤B≤0.030%, trace amounts ≤C≤0.1%, 0.01%≤Zr≤0.06%, nickel and inevitable impurities are the rest; with that, content of the components is expressed in at %: 8≤Al at %+Ti at %+Nb at %+Ta at %<11, 0.7<(Ti at %+Nb at %+Ta at %)/Al at % ≤1.3. A part made from superalloy, which represents the part of an aviation or ground gas turbine is described.

EFFECT: alloy has high mechanical properties at high temperature, as well as high forgeability.

14 cl, 1 dwg, 2 tbl, 10 ex

FIELD: metallurgy.

SUBSTANCE: method of producing nanocomposite with double shape memory based on monocrystal of ferromagnetic alloy Co35Ni35AI30 comprises primary annealing of monocrystal at 1330-1340°C for 8.5 h in inert gas. Then, tempering is carried out in water. Secondary annealing is carried in two steps. Note here that monocrystal is placed at test machine clamps; vacuum of 10-2-10-3 Pa is created to heat it to intermediate temperature of 200°C. Then, compressive strength of 100-120 MPa is applied in direction [011] in monocrystal to be heated to 400°C at the rate of 10-20°C/min and held thereat for 0.5 h and cooled to 200°C, thereafter load being removed. Now cooling is performed to room temperature at the rate of 10-20°C/min.

EFFECT: higher mechanical and functional properties, material with double shape memory and high-temperature superelasticity.

1 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: liquid alloy is quenched, its composition being as follows in wt %: boron - 2.1-3.5, silicon - 2.0-4.5, nickel - 5.0-10.0, cobalt - 15.0-30.0, chromium - 12.0-20.0, iron and unavoidable impurities making the rest, provided the following terms are satisfied: sum of boron and silicon makes 4.5-7.0, while that of boron and nickel equals 7.5-13.0. Then, intensive plastic deformation by twisting is performed by quasihydrostatic pressure and temperature and ultrasound processing at 18.0-22.0 kHz are performed.

EFFECT: high hardness and saturation magnetisation at low coercive force.

1 tbl, 1 ex

FIELD: metallurgy.

SUBSTANCE: after homogenisation and two-stage ageing the proposed material is subject to additional treatment by heating to the temperature of 1100+10°C≤Tto≤(Tid y' - 10°C), where Tid y' - intensive dilution temperature of γ'-phase in the alloy, exposure at this temperature and cooling at the rate of not less than 50 deg/min.

EFFECT: improving mechanical properties of casting products from carbon-free heat-resistant nickel alloys with monocrystalline structure.

3 dwg, 1 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing composite material from titanium nickelide-based alloys. The disclosed method involves process connection of a basic semi-finished product and porous components via self-propagating high-temperature synthesis, wherein titanium nickelide is additionally introduced into the structure of the composite material on selected areas of the semi-finished product. Titanium nickelide is a powder with the following grain-size distribution: 50-100 mcm - 60 wt %, 100-150 mcm - 40 wt %, and is introduced into said structure by sintering at 1260-1280°C for 1-5 minutes.

EFFECT: widening the pore size interval towards small values.

4 dwg, 1 ex

FIELD: metallurgy.

SUBSTANCE: method for obtaining plate articles from nickel heat-resistant alloys is proposed. Method involves casting of an ingot, deformation treatment of ingot, hot pre-rolling and final rolling, and forming of plate articles. Hot pre-rolling is carried out with deformation degree of not less than 70% and deformation speed of 1-5 sec-1 at Trollγ'+30÷100°C, final rolling is performed in cold state with deformation degree of 5-20% per pass, with total deformation degree of 20-80%; after hot pre-rolling and final cold rolling there carried out is heat treatment at Trollγ'+30÷80°C and exposure during 15-60 minutes with next quick cooling, and formation of plate articles is performed by cold forming.

EFFECT: forming of optimum structural condition with high technological ductility at hot and cold rolling operations of plates, high forming coefficients, high level of plate articles performance and reduction of labour intensity of their production.

2 tbl, 4 ex

FIELD: metallurgy.

SUBSTANCE: antifriction material contains the following, wt %: molybdenum disulphide not more than 10, ceramic compounds of monocrystal molybdenum - the rest. Its porousness is 5-35%.

EFFECT: possibility of use under radiation emission and high temperatures in places of hard access for repair without replacement and maintenance due to better wear-resistance, heat resistance, hardness and low plasticity.

1 dwg, 1 tbl, 2 ex

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