Material for components of disk brake
SUBSTANCE: invention relates to structural powder metallurgy, particularly to powder frictional material. It can be used for manufacturing of components of disk brakes, particularly, lining of disk brakes. Material contains, wt %: tin 1.8-3, iron 7-20, graphite 7-20, fused alumina 1.5-2, ferromolybdenum 0.5-2 and copper-the rest.
EFFECT: material provides high frictional thermal stability and strength of components of disk brakes, and also high wear resistance of lining of disk brakes.
The invention relates to construction materials made by powder metallurgy of metallic and non-metallic powders and intended for the manufacture of disc brake parts, namely, pads disc brakes.
Pad disc brake has a steel base with pressed and pripojenym metal-ceramic friction layer. These pads are used for brake systems of machines, plants, including for installation on rolling stock of Railways and ensure the operation of disc brakes at maximum pressure up to 0.7 MPa (7.0 kg/cm), the sliding speed of not more than 50 m/s in conditions of dry friction with the brake disk.
Known friction plate, in which the friction material is used, a metal composition comprising (in weight%): the 40-50 copper, tin 3-9, iron 9-15, graphite 10-20, lead 3-10 and oxide 4-15. ("The friction pad with a metal layer of copper-based" - THAT 1479-002-49123292-2005).
When using the known pads on the surface of the disk brakes are marked local Navara of the friction material pads (navrachana"), having in its composition of solid constituents. Material transfer plates on the disk contributes significantly to the high temperature close to the temperature of the reservoir is economic strain, and the presence in the structure of the low-melting components.
Known material has a structure that consists of a mechanical mixture of metals (Cu, Fe, Sn) and graphite in a free state, and compounds based on them. The Brinell hardness of the cermet layer lining 40-60 HB.
The technical result that can be obtained from the use of the invention is to increase frictional heat resistance and strength of the disc brake parts, as well as increasing the wear pads of the disk brake.
Material based on copper, according to the invention provides high frictional resistance and strength of the disc brake parts, contains (in weight%): tin 1,8-3, iron 7-20, graphite 7-20%, the oxide of 1.5-2, ferromolybdenum 0.5 to 2 and the copper - rest.
The proposed structure is different from the known material that further comprises ferromolybdenum.
Example of receipt.
Material intended for the manufacture of linings disc brakes, made by powder metallurgy of metallic and non-metallic powders, such as: copper, tin, iron, graphite, abrasive powder of oxide and ferromolybdenum. The plate is a steel base with pressed and pripojenym metal-ceramic friction layer (wt.%):
Cu - 77,5; Sn - 2,5; Fe - 6,0; - 11,0; Al2O
The resulting material provides high frictional resistance and strength of the disc brake parts:
|- Brinell hardness cermet|
|ply lining||15-50 NV|
|- the maximum permissible specific pressure|
|on the cermet layer||up to 6 MPa (60 kg/cm2)|
|- maximum allowable sliding speed||up to 50 m/s|
|- coefficient of friction depending on speed||0,28-0,45|
|- working area of the two plates is not less than||342 cm2|
The data presented show that the proposed composition of the material provides a high frictional resistance, durability disc brake parts, as well as increased wear and strength characteristics of overlays.
Material for disc brake parts containing copper, tin, iron, graphite, aluminium oxide, characterized in that it additionally contains what it ferromolybdenum in the following ratio of components,
FIELD: automotive industry.
SUBSTANCE: invention relates to automotive industry, particularly to automotive friction disk or drum brake shoe linings. Proposed lining comprises polymer composite friction element of porous structure. Polymer composite features a discrete-structure polymer matrix.
EFFECT: higher stability of friction properties in high-torque friction contact and reduced noise.
FIELD: automotive industry.
SUBSTANCE: invention relates to automotive industry, particularly to automotive friction disk or drum brake shoe linings. Proposed lining comprises polymer composite friction element of porous structure and communicating cavities. Aforesaid friction element comprises particles made from material in high-elasticity state at normal operating conditions. Particles sizes correspond to pore sizes or exceed them at least 15 times.
EFFECT: longer life.
FIELD: railway transport.
SUBSTANCE: invention relates to railway transport, particularly to railway vehicle block brakes. Block brake comprises at least one-layer composite friction element, wire carcass and two solid inserts. Aforesaid wire carcass is pressed in the composite friction material on the block brake rear side. Solid inserts are jointed with the wire carcass. Each of two solid inserts has at least one ledge on the brake rear part, on every side along the insert length. One of the said ledges is arranged in central boss, on both sides from the block center.
EFFECT: higher-efficiency braking, increased durability and longer life.
4 cl, 4 dwg
FIELD: machine building.
SUBSTANCE: invention relates to friction products, particularly, to blocks and linings of the vehicle disk and drum brakes. The proposed friction product includes a polymer composite friction element with ferromagnetic particles from magnetically soft material. Additionally, it comprises the particles of magnetically hard material with the ratio of magnetically soft-to-magnetically hard particles making from 1:1 to 1.5:1, respectively. As a result, friction properties are improved due to accelerated stabilisation of friction characteristics during initial operation in, primarily, out-of-town conditions. This has been achieved because of constant heating of proposed product during reversal magnetisation under temperatures that cause no fast destruction of friction composite polymer matrix.
EFFECT: improved friction properties.
SUBSTANCE: invention refers to the method for oxidation defence of the article made from composite carbon-containing material and having the residual open inner pores. The said method includes at least one stage of composite material impregnating to depth with the impregnating composition containing at least one metal phosphate in the solution and titanium diboride in the form of the powder with particle size in the range from 0.1 mcm to 200 mcm. The invention refers also to the article obtained by the aforementioned method. Invention is developed in related items of invention formula.
EFFECT: invention provides the article oxidation defence at temperatures more than 1000°C, particularly in the presence of carbon oxidation catalyst and in wet conditions.
10 cl, 12 dwg, 9 ex, 3 tbl
SUBSTANCE: invention relates to friction elements containing a polymer composite layer to be operated in various friction assemblies in contact with a metal counter body. The proposed friction product comprises a friction element made in a polymer binder, dispersed fillers, fibrous reinforcing and metal-containing fillers. The friction element comprises additionally not over 2.5 % of a material made from powder high-molecular polyethylene as filler.
EFFECT: higher friction-wear properties due to higher friction and mechanical-effect.
FIELD: engineering industry.
SUBSTANCE: invention refers to engineering industry, and namely to manufacturing methods of friction items with firm inserts, which are meant for various transport types. Method is realised by hot moulding of shoe from polymer compound in a moulding tool under pressure at simultaneous alignment thereof with metal frame and firm inserts. Hot moulding is carried out in moulding tool with grooves located in a punch that forms the shoe working surface in firm insert location areas. Process projections are formed from polymer friction material on shoe working surface in those zones; then, shoe working surface is machined and process projections are removed, thus providing arrangement of working surfaces of firm inserts and polymer friction material in one plane. Moulding tool used for shoe manufacturing consists of a matrix and upper and lower punches. Punch forming the shoe working surface is equipped with grooves meant for each of the inserts arranged in location areas of firm insert working surfaces. Each groove is bigger than the appropriate insert.
EFFECT: providing the possibility of manufacturing railroad transport means brake shoe and locating working surfaces of firm inserts and working surface of friction material of shoe friction element in one and the same plane, providing efficient operation from the very beginning of brake shoe operation, and minimising the number of expensive friction material waste appearing during machining of shoe working surface.
2 cl, 3 dwg, 4 ex
SUBSTANCE: braking block comprises metal carcass, composite material friction element and two solid inserts arranged symmetrically relative to the block horizontal axis and overlapping its friction part over the width. The said metal carcass represents a wire carcass representing two closed frames press-fitted into the block rear part friction material and perforated tin press-fitted into the block rear part composite friction material. Inner parts of the said frames are partially interoverlapped and bent outwards from the block rear part to form an ear designed to pass the cotter. Rear nonoperating part of every cotter has consoles arranged on each side of the aforesaid inserts all along their length. One of the said consoles is bent towards the block rear surface and arranged in the central boss, the other one being located between the central and auxiliary bosses. Each of the inserts is fitted into one of the wire carcass frames and jammed therein. The inserts, along with the carcass, are pressed in the composite friction material so that the insert console rear surfaces are located in one plate with the perforated tin of the block rear side.
EFFECT: higher durability and safety, longer service life, sable braking capacity and wheel surface recovery in braking.
3 cl, 3 dwg
FIELD: machine building.
SUBSTANCE: invention relates to machine building, particularly, to components used for separation of stacked porous plates in production process. Proposed circular gasket has opposed first and second surfaces with multiple holes. The said gasket is made of metal wire screen and partially form multiple radial gas-passages, each passing between the gasket inner and outer radial sides to inter-joint them. Method of preparing circular carbon fiber blanks for chemical filtration in vapor phase consists in stacking the aforesaid carbon fiber blanks. Between every two circular blanks, a circular metal screen cushion is laid so as to make stacked circular blanks and circular gaskets form interfaces of internal space inside a stack. Every circular gasket has first and second opposed surfaces and is made so as to form multiple radial gas passages communicating the stack inner space with outside space.
EFFECT: updating production process.
20 cl, 11 dwg
FIELD: machine building.
SUBSTANCE: invention relates to machine building, particularly, to components used for separation of stacked porous plates in production process. Circular gasket is made of carbon material whereon an adhesive coat layer is applied and incorporates opposed first and second surfaces. Note that at least one of the said surfaces has multiple radial channels each passing between the gasket inner and outer radial sides to inter-joint them. Method of preparing circular carbon fiber blanks for chemical filtration in vapor phase consists in stacking the aforesaid carbon fiber blanks. Between every two circular blanks, a circular metal screen cushion is laid so as to make stacked circular blanks and circular gaskets form interfaces of internal space inside a stack. Every aforesaid circular gasket comprises adhesive coat layer applied thereon to prevent sticking of circular carbon blanks. Method of producing one-piece circular carbon-material gasket consists in forming one-piece circular carbon-material gasket with opposed first and second surfaces and radial channel and applying adhesive coat layer on the said circular gasket.
EFFECT: updating production process.
22 cl, 11 dwg
SUBSTANCE: invention relates to powder metallurgy, particularly to sintered copper-base alloys. It can be used to manufacture simple parts in terms of their configuration that can be working under friction conditions. The alloy contains, wt %: tin 4.0-6.0; zinc 4.0-6.0; lead 4.0-6.0; nickel 8.0-10.0; iron 0.04-0.06; titanium 0.12-0.16; tungsten 0.22-0.26; the rest is copper.
EFFECT: production of the alloy with high hardness.
SUBSTANCE: invention relates to powder metallurgy, particularly to sintered copper-base alloys. It can be used to manufacture simple parts in terms of their configuration that can be working under friction conditions. The alloy contains, wt %: tin 4.0-6.0; zinc 4.0-6.0; lead 4.0-6.0; nickel 4.0-6.0; iron 0.02-0.03; hafnium 0.12-0.18; calcium 0.04-0.08; the rest is copper.
EFFECT: production of the alloy with high hardness.
SUBSTANCE: invention relates to non-ferrous metallurgy and can be used for manufacturing of fine mechanics details, telephone apparatus, products of decorative purpose. For increasing of alloy durability it contains, wt %: nickel 36.0-38.0; zinc 26.0-30.0; boron 0.003-0.007; zirconium 0.1-0.2; vanadium 0.1-0.2; aluminium 0.5-0.9; manganese 0.5-0.9; silicon 0.1-0.2; antimony 0.001-0.002; copper - the rest. Ultimate stress limit of alloy at tension is approximately 75 kg/mm2.
EFFECT: alloy hardening.
SUBSTANCE: invention relates to metallurgy field, for increasing of brass corrosion stability, it contains, wt %: copper 70.0-75.0; aluminium 4.0-5.0; nickel 0.5-1.0; zirconium 0.1-0.3; iron 0.03-0.05; manganese 0.8-1.2; selenium 0.03-0.05; silver 0.1-0.3; zinc - the rest. Mass losses at contact with salt water are approximately 0.02 g/m2 h.
EFFECT: it can be used for manufacturing of condensers tube of sea-going craft, of different heat engineering equipment.
SUBSTANCE: invention relates to non-ferrous metallurgy and can be used for manufacturing of screw propellers, tooth gears, pump casings. For increasing of flexibility bronze allows following composition, wt %: aluminium 10.0-15.0; iron 0.6-0.8; silicon 2.0-3.0; nickel 3.5-4.5; titanium 0.01-0.02; zirconium 0.01-0.02; manganese 2.5-4.0; silver 0.8-1.0; copper - the rest. Specific elongation is 9 - 12 %.
EFFECT: flexibility increasing.
SUBSTANCE: invention relates to metallurgy, particularly to compound of alloys on the basis of copper for manufacturing of watchcases, coins, flatware, jewelry. For increasing of free-flowing alloy allows following content, wt %: beryllium 0.01-0.03; silver 3.0-5.0; zinc 6.0-10.0; gold 2.0-3.0; nickel 0.2-0.3; boron 0.01-0.03; copper - the rest. Free-flowing of alloy by spiral test is 430 - 450 mm.
EFFECT: increasing of alloy free-flowing.
SUBSTANCE: invention relates to metallurgy, particularly to composition of alloys on the basis of copper for manufacturing of watchcases, coins, flatwares, jewelries. For increasing of alloy free-flowing it allows following compound, wt %: beryllium 0.01-0.03; silver 5.5-6.5; zinc 14.0-15.0; gold 0.5-1.0; cerium 0.2-0.3; tungsten 0.2-0.3; copper - the rest. Alloy free-flowing by spiral test is 450 - 470 mm.
EFFECT: increasing of alloy free-flowing .
SUBSTANCE: invention relates to metallurgy and relates to compound of brass, which can be used for manufacturing of massive heavy duty details - worm wheel row, adjusting screw nuts of rolling mills. Brass contains, wt %: zinc 35.0-45.0; nickel 12.0-15.0; silicon 0.5-1.0; titanium 0.02-0.04; tungsten 0.25-0.3; copper - the rest. It is increased brass ultimate stress limit, constituting 55 - 60 kilogram-force/mm2.
EFFECT: increasing of brass ultimate stress limit.
SUBSTANCE: invention relates to powder metallurgy, particularly it relates dispersion-rein-forced composite on the basis of copper. It can be used for manufacturing of contact welding electrodes and sliding contacts, operating with high loadings. Composite contains, wt %: aluminium 0.15-0.60; oxygen 0.14-0.55; carbon 0.04-0.14; copper - the rest.
EFFECT: high-conductivity and plasticity with keeping of durability, solidity and heat resistance.
3 tbl, 2 ex
SUBSTANCE: alloy contains, wt %: tin 4.0-6.0, zinc 6.0-8.0, nickel 8.0-10.0, iron 0.01-0.03, manganese 0.2-0.3, copper - the rest.
EFFECT: alloy allows high strength.
SUBSTANCE: invention relates to powder metallurgy, particularly to receiving of alloys on the basis of strengthen by oxides alloyed intermetallic semiconductor NiAl. It can be used in aviation and automobile industry, shipbuilding for manufacturing of high-beat parts of gas turbine engine. Composite material consists of 2-2.8 vol. % of strengthening phase Y2O3 and matrix, containing, wt %: aluminium 26.8-29.2; cobalt 8.5-12.2; niobium 2.2-3.6; chrome 2.0-3.9; nickel 53.5-58.2. Powder of matrix alloy and strengthening phase are mixed with simultaneous grinding of alloy powder up to size less than 10 micrometres. Mixture is extruded in capsule at temperature 1100-1200°C with elongation ratio more than 15, and annealed at temperature higher 0.8 Tf of matrix alloy with temperature gradient by length of extruded blank.
EFFECT: obtaining material, which allows high durability at 1100 °C and durability at 1200-1400 °C at satisfactory fracture toughness at low temperatures.
9 cl, 3 tbl, 1 ex