CN106424708A - High-heat-resistance powder metallurgy material for train brake lining - Google Patents
High-heat-resistance powder metallurgy material for train brake lining Download PDFInfo
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- CN106424708A CN106424708A CN201610919280.5A CN201610919280A CN106424708A CN 106424708 A CN106424708 A CN 106424708A CN 201610919280 A CN201610919280 A CN 201610919280A CN 106424708 A CN106424708 A CN 106424708A
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- brake pad
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
Abstract
The invention discloses a high-heat-resistance powder metallurgy material for a train brake lining. The material comprises the following raw materials: copper powder, tungsten powder, ferromanganese ore powder, iron powder, lead powder, molybdenum disulfide powder, yttrium powder, titanium carbide powder, tantalum carbide powder, tin powder, silicon dioxide, boron nitride powder, graphite powder, glycerol, stearic acid, boron fibers, carbon fibers, PET resins, carboxymethylcellulose, polyacrylamide, a degassing agent, a leveling agent, a coupling agent, adhesive, a reinforcing agent, a cutting agent, a lubricating agent, amide wax, silicon nitride, epoxy propyl trimethoxy silane, manganous sulfide, silicon carbide, high chlorinated polyethylene resins, a dispersing agent, a conditioning agent, an inhibiting agent, a chain extending agent, an intercalation agent, a compatilizer, a thinner, a stabilizing agent, a bridging agent, a toughening agent, a stabilizing agent and a terminator. Through specific component ratios, the high-heat-resistance powder metallurgy material for the train brake lining is uniform in overall density, high in compactness, excellent in wear resistance, strength and hardness and high in material utilization rate.
Description
【Technical field】
The invention belongs to powder metallurgical technology, and in particular to a kind of powder metallurgy material for train brake pad of high-fire resistance.
【Background technology】
At present, railway is important infrastructure, the large artery trunks of national economy and the popular vehicles of country.In order to ensure height
Fast EMUs high-speed secure operation, it is necessary to possess stably and good brakes, wherein brake pad are high-speed train brakings
The critical component of system and consumable accessory.With the continuous improvement of the EMU speed of service, the brake load of train is also significantly
Increase, during braking, huge kinetic energy is converted into heat energy by friction by brake lining, it requires that brake lining brake material should have higher
Mechanical strength, good thermostability and heat conductivity, stable frictional behaviour, relatively low abrasion and reduce mill to wheel
Consumption.
The brake lining material for commonly using in prior art has powder metallurgy and two class of high molecular synthetic material, wherein macromolecule
Synthetic material is declined seriously because of low intensity, poor heat resistance, heat, it is impossible to which the braking suitable for more than 300 kilometers bullet trains of speed per hour will
Ask；And powder metallurgy is by optimization of C/C composites and technique, can reach that intensity is high, heat conductivity is good, the advantages of stable friction performance, because
This is ideal brake lining brake material, is usually added into metallic tin and forms Cu-Sn conjunction in current powdered metallurgical material system
Gold strengthening matrix, but as stannum is low-melting-point metal (231.86 DEG C), the powdered metallurgical material for therefore being prepared by the matrix
Brake lining using temperature below 500 DEG C, and more than 500 DEG C after the intensity of material and frictional behaviour drastically will fail, it is impossible to have
Effect braking.
But, existing powder metallurgy material for train brake pad, as formula is not perfect enough, batch mixing is uneven, cause material
Material utilization rate is low, uneven, the consistency uneven by the global density of the part of heat treatment gained of the green compact being pressed into
Low, friction heat stability, thermostability, wearability, intensity and hardness are poor.
【Content of the invention】
The present invention provides a kind of powder metallurgy material for train brake pad of high-fire resistance, to solve existing train brake pad powder smelting
Golden material global density is uneven, and consistency is low, and friction heat stability, thermostability, wearability, intensity and hardness are poor, material
Utilization rate is low, the problems such as preparation cost is high.The powder metallurgy material for train brake pad of the high-fire resistance of the present invention, by specific
Composition proportion so that the powder metallurgy material for train brake pad global density of high-fire resistance is uniform, consistency height, rubs thermally-stabilised
Property and thermostability is excellent, comprcssive strength and hardness are preferable, stock utilization height.
For solving above technical problem, the present invention is employed the following technical solutions：
A kind of powder metallurgy material for train brake pad of high-fire resistance, in units of weight, including following raw material：Copper powder 753-
1498 parts, tungsten powder 36-58 part, ferromanganese breeze 14-27 part, iron powder 15-24 part, Hydrocerussitum (Ceruse) 25-34 part, molybdenum disulphide powder 18-26 part,
Yttrium powder 13-26 part, carbonized titanium powder 18-29 part, carbonization tantalum powder 14-18 part, glass putty 13-19 part, silicon dioxide 5-12 part, boron nitride
Powder 12-18 part, graphite powder 7-13 part, glycerol 23-32 part, stearic acid 9-18 part, boron fibre 14-23 part, carbon fiber 6-13 part,
PET resin 7-12 part, carboxymethyl cellulose 14-17 part, polyacrylamide 8-15 part, amide waxe 13-25 part, silicon nitride 6-9 part,
Glycidoxy-propyltrimethoxy silane 5-12 part, the sub- manganese 10-14 part of sulfuration, carborundum 6-9 part, HCPE 4-
6 parts, degasser 0.6-0.9 part, levelling agent 0.5-0.8 part, coupling agent 0.6-1.2 part, binding agent 1.4-3.2 part, reinforcing agent
0.9-1.5 part, cutting agent 0.8-1.2 part, lubricant 0.9-1.6 part, dispersant 0.7-0.9 part, regulator 0.6-0.8 part, suppression
Preparation 1-1.4 part, chain extender 0.7-1.3 part, intercalator 0.6-0.9 part, compatilizer 1.2-1.6 part, diluent 0.5-0.8 part,
Tranquilizer 0.9-1.5 part, bridging agent 0.6-1.1 part, toughener 0.5-0.7 part, stabilizer 0.3-0.6 part, terminator 0.4-0.6
Part；
The degasser is stearic acid；
The levelling agent is polyether polyester azo polyether polyeste；
The coupling agent is epoxy silane class coupling agent；
Described adhesive, in units of weight portion, including following raw material：Nickel aluminide 19-24 part, Titanium Trialuminum 12-17 part, nitridation
Aluminum 10-15 part, vanadium 4-6 part, yttrium 3-5 part；
The reinforcing agent is 701 powder reinforcing agents；
The cutting agent in units of weight, including following raw material：Silicone oil 24-28 part, phthalic acid dibutyl ester 12-17 part, two
Nonyl sodium naphthalene sulfonate 9-16 part, 2,6- di-t-butyl are to diethylstilbestrol 12-15 part, ethanedioic acid polyester 11-13 part, acrylamide 9-12
Part, oleamide 8-10 part, amino carboxylic acid quasi-chelate compound 3-5 part；
The lubricant, in units of weight, including following raw material：Polyvinyl isobutyl ether 23-48 part, amide waxe 9-14 part,
Lead stearate 15-23 part, carboxylic acid amide 7-14 part, acrylate 13-16 part, N-Methyl pyrrolidone 8-12 part；
The dispersant in units of weight, including following raw material：Polyethylene Glycol 25-32 part, Bi2O33-5 part, aminopropyl three
Ethoxysilane 6-9 part, aluminium carbide 10-15 part, Nb2O54-6 part, sulphuric acid tungsten 10-13 part, glycerol monostearate 20-30
Part；
The regulator is esters of acrylic acid regulator；
The inhibitor, in units of weight portion, including following raw material：Tungsten carbide 20-27 part, niobium carbide 14-19 part, tungsten nitride
12-16 part, molybdenum sulfide 10-12 part, cerium fluoride 13-16 part, carbon fiber 9-12 part；
The tranquilizer constituent is ardealite 0.5-0.9 part, ferrum oxide 0.4-0.6 part；
The stabilizer is fat acids stabilizer；
The terminator is styrene；
The preparation method of the powder metallurgy material for train brake pad of the high-fire resistance, comprises the following steps：
S1：By copper powder, tungsten powder, ferromanganese breeze, iron powder, Hydrocerussitum (Ceruse), molybdenum disulphide powder, yttrium powder, carbonized titanium powder, carbonization tantalum powder, glass putty,
Silicon dioxide, boron nitride powder, graphite powder, glycerol, stearic acid, boron fibre, carbon fiber are added in blender, are 128- in rotating speed
9-14min, prepared mixture A is stirred under 351r/min；
S2：By PET resin, carboxymethyl cellulose, polyacrylamide, degasser, levelling agent, coupling agent, binding agent, reinforcing agent,
Cutting agent, lubricant are added in blender and stir 14-23min, prepared mixture B under rotating speed is for 219-422r/min；
S3：By mixture B, amide waxe, silicon nitride, epoxypropoxy three obtained in mixture A, step S2 obtained in step S1
Methoxy silane, the sub- manganese of sulfuration, carborundum, HCPE, dispersant, regulator, inhibitor, chain extender, intercalation
Agent, compatilizer, diluent, tranquilizer, bridging agent, toughener, stabilizer, terminator are added in blender, in temperature are
262-307 DEG C, rotating speed is to stir 1.5-3.5h, prepared mixture C under 300-500r/min；
S4：Mixture C obtained in step S3 is put into press, the mixture C is sent in default product mold by press,
And green part is pressed under pressure is for 612-635MPa；
S5：Green part obtained in step S4 is placed in sintering furnace, in the protective atmosphere of hydrogen and nitrogen mixed gas, is first existed
At 702-718 DEG C, presintering 40-46min, wherein hydrogen are 1.16-2.25 with the volume ratio of nitrogen:90.6-95.8, then presses
Hereinafter rise mild temperature to be sintered：
1）With 14-21 DEG C/min of heating rate, 918-952 DEG C being warming up to from 702-718 DEG C, and is incubated 7-10 min；
2）With 19-24 DEG C/min of heating rate, 1020-1115 DEG C is warming up to from 918-952 DEG C, and is incubated 12-16min；
3）With 10-12 DEG C/min of heating rate, 1230-1280 DEG C is warming up to from 1020-1115 DEG C, and sinters at this temperature
138-145min, prepared workpiece；
S6：Workpiece obtained in step S5 is quenched, it is 35-47min 822-838 DEG C, cool time that hardening heat is, then
939-947 DEG C is warming up to 8-15 DEG C/min of heating rate, 60-71min is incubated, then is tempered, temperature is 232-
243 DEG C, tempering insulation time is 69-74min, prepared materials A；
S7：By materials A obtained in step S6 in carburizer, 863-885 DEG C is heated in gaseous carburizing medium, insulation
4.4-5.1h, is then cooled to 122-135 DEG C, is incubated 5.2-6.4h, followed by being cooled to room temperature, prepared material B；
S8：Material B obtained in step S7 is sent in steam oven, steam treatment is carried out, vapor (steam) temperature is 693-748 DEG C, to be incubated
2.2-3.1h, is then incubated 3.2-3.5h at 184-196 DEG C, is finally cooled to room temperature, the train brake pad of prepared high-fire resistance
Use powdered metallurgical material.
Further, the chain extender is methyl diphenylene diisocyanate.
Further, the intercalator is diethanolamine.
Further, the compatilizer is grafted compatilizer for maleic anhydride.
Further, the diluent is 515- diluent.
Further, the bridging agent is acrylic type bridging agent.
Further, the toughener is chlorinated polyethylene.
The invention has the advantages that：
The powder metallurgy material for train brake pad of the high-fire resistance of the present invention, by specific composition proportion so that high-fire resistance
Powder metallurgy material for train brake pad global density uniform, consistency height, friction heat stability and thermostability is excellent, comprcssive strength
Preferable with hardness, stock utilization height, it is suitable to the train brake pad powder metallurgy of the quick production high-performance high-heat-resistance of high-volume
Material.
【Specific embodiment】
For ease of more fully understanding the present invention, it is illustrated by following examples, these embodiments belong to the protection of the present invention
Scope, but do not limit the scope of the invention.
In an embodiment, the powder metallurgy material for train brake pad of the high-fire resistance, in units of weight, including following
Raw material：Copper powder 753-1498 part, tungsten powder 36-58 part, ferromanganese breeze 14-27 part, iron powder 15-24 part, Hydrocerussitum (Ceruse) 25-34 part, two sulfur
Change molybdenum powder 18-26 part, yttrium powder 13-26 part, carbonized titanium powder 18-29 part, carbonization tantalum powder 14-18 part, glass putty 13-19 part, titanium dioxide
Silicon 5-12 part, boron nitride powder 12-18 part, graphite powder 7-13 part, glycerol 23-32 part, stearic acid 9-18 part, boron fibre 14-23 part,
Carbon fiber 6-13 part, PET resin 7-12 part, carboxymethyl cellulose 14-17 part, polyacrylamide 8-15 part, amide waxe 13-25
Part, silicon nitride 6-9 part, glycidoxy-propyltrimethoxy silane 5-12 part, the sub- manganese 10-14 part of sulfuration, carborundum 6-9 part, height
Chlorinated polyethylene resin 4-6 part, degasser 0.6-0.9 part, levelling agent 0.5-0.8 part, coupling agent 0.6-1.2 part, binding agent
1.4-3.2 part, reinforcing agent 0.9-1.5 part, cutting agent 0.8-1.2 part, lubricant 0.9-1.6 part, dispersant 0.7-0.9 part, tune
Section agent 0.6-0.8 part, inhibitor 1-1.4 part, chain extender 0.7-1.3 part, intercalator 0.6-0.9 part, compatilizer 1.2-1.6 part,
Diluent 0.5-0.8 part, tranquilizer 0.9-1.5 part, bridging agent 0.6-1.1 part, toughener 0.5-0.7 part, stabilizer 0.3-0.6
Part, terminator 0.4-0.6 part；
The degasser is stearic acid；
The levelling agent is polyether polyester azo polyether polyeste；
The coupling agent is epoxy silane class coupling agent；
Described adhesive, in units of weight portion, including following raw material：Nickel aluminide 19-24 part, Titanium Trialuminum 12-17 part, nitridation
Aluminum 10-15 part, vanadium 4-6 part, yttrium 3-5 part；
The reinforcing agent is 701 powder reinforcing agents；
The cutting agent in units of weight, including following raw material：Silicone oil 24-28 part, phthalic acid dibutyl ester 12-17 part, two
Nonyl sodium naphthalene sulfonate 9-16 part, 2,6- di-t-butyl are to diethylstilbestrol 12-15 part, ethanedioic acid polyester 11-13 part, acrylamide 9-12
Part, oleamide 8-10 part, amino carboxylic acid quasi-chelate compound 3-5 part；
The lubricant, in units of weight, including following raw material：Polyvinyl isobutyl ether 23-48 part, amide waxe 9-14 part,
Lead stearate 15-23 part, carboxylic acid amide 7-14 part, acrylate 13-16 part, N-Methyl pyrrolidone 8-12 part；
The dispersant in units of weight, including following raw material：Polyethylene Glycol 25-32 part, Bi2O33-5 part, aminopropyl three
Ethoxysilane 6-9 part, aluminium carbide 10-15 part, Nb2O54-6 part, sulphuric acid tungsten 10-13 part, glycerol monostearate 20-30
Part；
The regulator is esters of acrylic acid regulator；
The inhibitor, in units of weight portion, including following raw material：Tungsten carbide 20-27 part, niobium carbide 14-19 part, tungsten nitride
12-16 part, molybdenum sulfide 10-12 part, cerium fluoride 13-16 part, carbon fiber 9-12 part；
The chain extender is methyl diphenylene diisocyanate；
The intercalator is diethanolamine；
The compatilizer is grafted compatilizer for maleic anhydride；
The diluent is 515- diluent；
The tranquilizer constituent is ardealite 0.5-0.9 part, ferrum oxide 0.4-0.6 part；
The bridging agent is acrylic type bridging agent；
The toughener is chlorinated polyethylene；
The stabilizer is fat acids stabilizer；
The terminator is styrene；
The preparation method of the powder metallurgy material for train brake pad of the high-fire resistance, comprises the following steps：
S1：By copper powder, tungsten powder, ferromanganese breeze, iron powder, Hydrocerussitum (Ceruse), molybdenum disulphide powder, yttrium powder, carbonized titanium powder, carbonization tantalum powder, glass putty,
Silicon dioxide, boron nitride powder, graphite powder, glycerol, stearic acid, boron fibre, carbon fiber are added in blender, are 128- in rotating speed
9-14min, prepared mixture A is stirred under 351r/min；
S2：By PET resin, carboxymethyl cellulose, polyacrylamide, degasser, levelling agent, coupling agent, binding agent, reinforcing agent,
Cutting agent, lubricant are added in blender and stir 14-23min, prepared mixture B under rotating speed is for 219-422r/min；
S3：By mixture B, amide waxe, silicon nitride, epoxypropoxy three obtained in mixture A, step S2 obtained in step S1
Methoxy silane, the sub- manganese of sulfuration, carborundum, HCPE, dispersant, regulator, inhibitor, chain extender, intercalation
Agent, compatilizer, diluent, tranquilizer, bridging agent, toughener, stabilizer, terminator are added in blender, in temperature are
262-307 DEG C, rotating speed is to stir 1.5-3.5h, prepared mixture C under 300-500r/min；
S4：Mixture C obtained in step S3 is put into press, the mixture C is sent in default product mold by press,
And green part is pressed under pressure is for 612-635MPa；
S5：Green part obtained in step S4 is placed in sintering furnace, in the protective atmosphere of hydrogen and nitrogen mixed gas, is first existed
At 702-718 DEG C, presintering 40-46min, wherein hydrogen are 1.16-2.25 with the volume ratio of nitrogen:90.6-95.8, then presses
Hereinafter rise mild temperature to be sintered：
1）With 14-21 DEG C/min of heating rate, 918-952 DEG C being warming up to from 702-718 DEG C, and is incubated 7-10 min；
2）With 19-24 DEG C/min of heating rate, 1020-1115 DEG C is warming up to from 918-952 DEG C, and is incubated 12-16min；
3）With 10-12 DEG C/min of heating rate, 1230-1280 DEG C is warming up to from 1020-1115 DEG C, and sinters at this temperature
138-145min, prepared workpiece；
S6：Workpiece obtained in step S5 is quenched, it is 35-47min 822-838 DEG C, cool time that hardening heat is, then
939-947 DEG C is warming up to 8-15 DEG C/min of heating rate, 60-71min is incubated, then is tempered, temperature is 232-
243 DEG C, tempering insulation time is 69-74min, prepared materials A；
S7：By materials A obtained in step S6 in carburizer, 863-885 DEG C is heated in gaseous carburizing medium, insulation
4.4-5.1h, is then cooled to 122-135 DEG C, is incubated 5.2-6.4h, followed by being cooled to room temperature, prepared material B；
S8：Material B obtained in step S7 is sent in steam oven, steam treatment is carried out, vapor (steam) temperature is 693-748 DEG C, to be incubated
2.2-3.1h, is then incubated 3.2-3.5h at 184-196 DEG C, is finally cooled to room temperature, the train brake pad of prepared high-fire resistance
Use powdered metallurgical material.
Embodiment 1
A kind of powder metallurgy material for train brake pad of high-fire resistance, in units of weight, including following raw material：Copper powder 1200
Part, 45 parts of tungsten powder, 22 parts of ferromanganese breeze, 20 parts of iron powder, 28 parts of Hydrocerussitum (Ceruse), 23 parts of molybdenum disulphide powder, 20 parts of yttrium powder, carbonized titanium powder 24
Part, 16 parts of carbonization tantalum powder, 16 parts of glass putty, 8 parts of silicon dioxide, 15 parts of boron nitride powder, 10 parts of graphite powder, 26 parts of glycerol, stearic acid
14 parts, 20 parts of boron fibre, 9 parts of carbon fiber, 8 parts of PET resin, 16 parts of carboxymethyl cellulose, 13 parts of polyacrylamide, amide waxe 23
Part, 8 parts of silicon nitride, 9 parts of glycidoxy-propyltrimethoxy silane, sub- 12 parts of the manganese of sulfuration, 7 parts of carborundum, highly-chlorinated polyethylene
5 parts of resin, 0.8 part of degasser, 0.7 part of levelling agent, 0.9 part of coupling agent, 2.4 parts of binding agent, 1.2 parts of reinforcing agent, cutting agent 1
Part, 1.2 parts of lubricant, 0.8 part of dispersant, 0.7 part of regulator, 1.2 parts of inhibitor, 1 part of chain extender, 0.8 part of intercalator, compatible
1.4 parts of agent, 0.7 part of diluent, 1.2 parts of tranquilizer, 0.8 part of bridging agent, 0.6 part of toughener, 0.5 part of stabilizer, terminator 0.5
Part；
The degasser is stearic acid；
The levelling agent is polyether polyester azo polyether polyeste；
The coupling agent is epoxy silane class coupling agent；
Described adhesive, in units of weight portion, including following raw material：23 parts of nickel aluminide, 15 parts of Titanium Trialuminum, aluminium nitride 13
Part, 5 parts of vanadium, 4 parts of yttrium；
The reinforcing agent is 701 powder reinforcing agents；
The cutting agent in units of weight, including following raw material：26 parts of silicone oil, 15 parts of phthalic acid dibutyl ester, dinonyl naphthalene
13 parts of sodium sulfonate, 2,6- di-t-butyl are to 14 parts of diethylstilbestrol, 12 parts of ethanedioic acid polyester, 10 parts of acrylamide, 9 parts of oleamide, ammonia
4 parts of yl carboxylic acid quasi-chelate compound；
The lubricant, in units of weight, including following raw material：36 parts of polyvinyl isobutyl ether, 12 parts of amide waxe, stearic acid
19 parts of lead, 12 parts of carboxylic acid amide, 15 parts of acrylate, 10 parts of N-Methyl pyrrolidone；
The dispersant in units of weight, including following raw material：28 parts of Polyethylene Glycol, Bi2O34 parts, aminopropyl-triethoxy
7 parts of silane, 14 parts of aluminium carbide, Nb2O55 parts, 12 parts of sulphuric acid tungsten, 25 parts of glycerol monostearate；
The regulator is esters of acrylic acid regulator；
The inhibitor, in units of weight portion, including following raw material：26 parts of tungsten carbide, 15 parts of niobium carbide, 14 parts of tungsten nitride,
11 parts of molybdenum sulfide, 15 parts of cerium fluoride, 11 parts of carbon fiber；
The chain extender is methyl diphenylene diisocyanate；
The intercalator is diethanolamine；
The compatilizer is grafted compatilizer for maleic anhydride；
The diluent is 515- diluent；
The tranquilizer constituent is 0.7 part of ardealite, 0.5 part of ferrum oxide；
The bridging agent is acrylic type bridging agent；
The toughener is chlorinated polyethylene；
The stabilizer is fat acids stabilizer；
The terminator is styrene；
The preparation method of the powder metallurgy material for train brake pad of the high-fire resistance, comprises the following steps：
S1：By copper powder, tungsten powder, ferromanganese breeze, iron powder, Hydrocerussitum (Ceruse), molybdenum disulphide powder, yttrium powder, carbonized titanium powder, carbonization tantalum powder, glass putty,
Silicon dioxide, boron nitride powder, graphite powder, glycerol, stearic acid, boron fibre, carbon fiber are added in blender, in rotating speed are
13min, prepared mixture A is stirred under 200r/min；
S2：By PET resin, carboxymethyl cellulose, polyacrylamide, degasser, levelling agent, coupling agent, binding agent, reinforcing agent,
Cutting agent, lubricant are added in blender and stir 18min, prepared mixture B under rotating speed is for 300r/min；
S3：By mixture B, amide waxe, silicon nitride, epoxypropoxy three obtained in mixture A, step S2 obtained in step S1
Methoxy silane, the sub- manganese of sulfuration, carborundum, HCPE, dispersant, regulator, inhibitor, chain extender, intercalation
Agent, compatilizer, diluent, tranquilizer, bridging agent, toughener, stabilizer, terminator are added in blender, are 268 in temperature
DEG C, rotating speed is to stir 2.5h, prepared mixture C under 400r/min；
S4：Mixture C obtained in step S3 is put into press, the mixture C is sent in default product mold by press,
And green part is pressed under pressure is for 623MPa；
S5：Green part obtained in step S4 is placed in sintering furnace, in the protective atmosphere of hydrogen and nitrogen mixed gas, is first existed
At 720 DEG C, presintering 44min, wherein hydrogen are 1.86 with the volume ratio of nitrogen:94.2, then enter by following liter of mild temperature
Row sintering：
1）With 17 DEG C/min of heating rate, 935 DEG C are warming up to from 710 DEG C, and are incubated 9 min；
2）With 22 DEG C/min of heating rate, 1090 DEG C are warming up to from 935 DEG C, and are incubated 15min；
3）With 11 DEG C/min of heating rate, 1260 DEG C being warming up to from 1090 DEG C, and sinters 142min, prepared work at this temperature
Part；
S6：Workpiece obtained in step S5 is quenched, it is 42min 832 DEG C, cool time that hardening heat is, then to heat up
12 DEG C/min of speed is warming up to 943 DEG C, is incubated 67min, then is tempered, and temperature is that 239 DEG C, tempering insulation time is
72min, prepared materials A；
S7：By materials A obtained in step S6 in carburizer, 878 DEG C being heated in gaseous carburizing medium, is incubated 4.7h,
128 DEG C are then cooled to, are incubated 5.8h, followed by room temperature is cooled to, prepared material B；
S8：Material B obtained in step S7 is sent in steam oven, steam treatment is carried out, vapor (steam) temperature is 723 DEG C, 2.8h is incubated,
Then 3.4h being incubated at 188 DEG C, is finally cooled to room temperature, the powder metallurgy material for train brake pad of prepared high-fire resistance.
Embodiment 2
A kind of powder metallurgy material for train brake pad of high-fire resistance, in units of weight, including following raw material：753 parts of copper powder,
36 parts of tungsten powder, 14 parts of ferromanganese breeze, 15 parts of iron powder, 25 parts of Hydrocerussitum (Ceruse), 18 parts of molybdenum disulphide powder, 13 parts of yttrium powder, 18 parts of carbonized titanium powder,
14 parts of carbonization tantalum powder, 13 parts of glass putty, 5 parts of silicon dioxide, 12 parts of boron nitride powder, 7 parts of graphite powder, 23 parts of glycerol, 9 parts of stearic acid,
14 parts of boron fibre, 6 parts of carbon fiber, 7 parts of PET resin, 14 parts of carboxymethyl cellulose, 8 parts of polyacrylamide, 13 parts of amide waxe, nitrogen
6 parts of SiClx, 5 parts of glycidoxy-propyltrimethoxy silane, sub- 10 parts of the manganese of sulfuration, 6 parts of carborundum, HCPE 4
Part, 0.6 part of degasser, 0.5 part of levelling agent, 0.6 part of coupling agent, 1.4 parts of binding agent, 0.9 part of reinforcing agent, 0.8 part of cutting agent, profit
0.9 part of lubrication prescription, 0.7 part of dispersant, 0.6 part of regulator, 1 part of inhibitor, 0.7 part of chain extender, 0.6 part of intercalator, compatilizer 1.2
Part, 0.5 part of diluent, 0.9 part of tranquilizer, 0.6 part of bridging agent, 0.5 part of toughener, 0.3 part of stabilizer, 0.4 part of terminator；
The degasser is stearic acid；
The levelling agent is polyether polyester azo polyether polyeste；
The coupling agent is epoxy silane class coupling agent；
Described adhesive, in units of weight portion, including following raw material：19 parts of nickel aluminide, 12 parts of Titanium Trialuminum, aluminium nitride 10
Part, 4 parts of vanadium, 3 parts of yttrium；
The reinforcing agent is 701 powder reinforcing agents；
The cutting agent in units of weight, including following raw material：24 parts of silicone oil, 12 parts of phthalic acid dibutyl ester, dinonyl naphthalene
9 parts of sodium sulfonate, 2,6- di-t-butyl are to 12 parts of diethylstilbestrol, 11 parts of ethanedioic acid polyester, 9 parts of acrylamide, 8 parts of oleamide, amino
3 parts of carboxylic acid quasi-chelate compound；
The lubricant, in units of weight, including following raw material：23 parts of polyvinyl isobutyl ether, 9 parts of amide waxe, stearic acid
15 parts of lead, 7 parts of carboxylic acid amide, 13 parts of acrylate, 8 parts of N-Methyl pyrrolidone；
The dispersant in units of weight, including following raw material：25 parts of Polyethylene Glycol, Bi2O33 parts, aminopropyl-triethoxy
6 parts of silane, 10 parts of aluminium carbide, Nb2O54 parts, 10 parts of sulphuric acid tungsten, 20 parts of glycerol monostearate；
The regulator is esters of acrylic acid regulator；
The inhibitor, in units of weight portion, including following raw material：20 parts of tungsten carbide, 14 parts of niobium carbide, 12 parts of tungsten nitride,
10 parts of molybdenum sulfide, 13 parts of cerium fluoride, 9 parts of carbon fiber；
The chain extender is methyl diphenylene diisocyanate；
The intercalator is diethanolamine；
The compatilizer is grafted compatilizer for maleic anhydride；
The diluent is 515- diluent；
The tranquilizer constituent is 0.5 part of ardealite, 0.4 part of ferrum oxide；
The bridging agent is acrylic type bridging agent；
The toughener is chlorinated polyethylene；
The stabilizer is fat acids stabilizer；
The terminator is styrene；
The preparation method of the powder metallurgy material for train brake pad of the high-fire resistance, comprises the following steps：
S1：By copper powder, tungsten powder, ferromanganese breeze, iron powder, Hydrocerussitum (Ceruse), molybdenum disulphide powder, yttrium powder, carbonized titanium powder, carbonization tantalum powder, glass putty,
Silicon dioxide, boron nitride powder, graphite powder, glycerol, stearic acid, boron fibre, carbon fiber are added in blender, in rotating speed are
14min, prepared mixture A is stirred under 128r/min；
S2：By PET resin, carboxymethyl cellulose, polyacrylamide, degasser, levelling agent, coupling agent, binding agent, reinforcing agent,
Cutting agent, lubricant are added in blender and stir 23min, prepared mixture B under rotating speed is for 219r/min；
S3：By mixture B, amide waxe, silicon nitride, epoxypropoxy three obtained in mixture A, step S2 obtained in step S1
Methoxy silane, the sub- manganese of sulfuration, carborundum, HCPE, dispersant, regulator, inhibitor, chain extender, intercalation
Agent, compatilizer, diluent, tranquilizer, bridging agent, toughener, stabilizer, terminator are added in blender, are 262 in temperature
DEG C, rotating speed is to stir 3.5h, prepared mixture C under 300r/min；
S4：Mixture C obtained in step S3 is put into press, the mixture C is sent in default product mold by press,
And green part is pressed under pressure is for 612MPa；
S5：Green part obtained in step S4 is placed in sintering furnace, in the protective atmosphere of hydrogen and nitrogen mixed gas, is first existed
At 702 DEG C, presintering 46min, wherein hydrogen are 1.16 with the volume ratio of nitrogen:90.6, then enter by following liter of mild temperature
Row sintering：
1）With 14 DEG C/min of heating rate, 918 DEG C are warming up to from 702 DEG C, and are incubated 10 min；
2）With 19 DEG C/min of heating rate, 1020 DEG C are warming up to from 918 DEG C, and are incubated 16min；
3）With 10 DEG C/min of heating rate, 1230 DEG C being warming up to from 1020 DEG C, and sinters 145min, prepared work at this temperature
Part；
S6：Workpiece obtained in step S5 is quenched, it is 47min 822 DEG C, cool time that hardening heat is, then to heat up
8 DEG C/min of speed is warming up to 939 DEG C, is incubated 71min, then is tempered, and temperature is that 232 DEG C, tempering insulation time is
74min, prepared materials A；
S7：By materials A obtained in step S6 in carburizer, 863 DEG C being heated in gaseous carburizing medium, is incubated 4.4h,
122 DEG C are then cooled to, are incubated 6.4h, followed by room temperature is cooled to, prepared material B；
S8：Material B obtained in step S7 is sent in steam oven, steam treatment is carried out, vapor (steam) temperature is 693 DEG C, 3.1h is incubated,
Then 3.5h being incubated at 184 DEG C, is finally cooled to room temperature, the powder metallurgy material for train brake pad of prepared high-fire resistance.
Embodiment 3
A kind of powder metallurgy material for train brake pad of high-fire resistance, in units of weight, including following raw material：Copper powder 1498
Part, 58 parts of tungsten powder, 27 parts of ferromanganese breeze, ferrum 15-24 part, 34 parts of Hydrocerussitum (Ceruse), 26 parts of molybdenum disulphide powder, 26 parts of yttrium powder, carbonized titanium powder
29 parts, 18 parts of carbonization tantalum powder, 19 parts of glass putty, 2 parts of silica 1,18 parts of boron nitride powder, 13 parts of graphite powder, 32 parts of glycerol, hard ester
18 parts of acid, 23 parts of boron fibre, 13 parts of carbon fiber, 12 parts of PET resin, 17 parts of carboxymethyl cellulose, 15 parts of polyacrylamide, amide
25 parts of wax, 9 parts of silicon nitride, 12 parts of glycidoxy-propyltrimethoxy silane, sub- 14 parts of the manganese of sulfuration, 9 parts of carborundum, high chlorination gather
6 parts of vinyl, 0.9 part of degasser, 0.8 part of levelling agent, 1.2 parts of coupling agent, 3.2 parts of binding agent, 1.5 parts of reinforcing agent, cutting
1.2 parts of agent, 1.6 parts of lubricant, 0.9 part of dispersant, 0.8 part of regulator, 1.4 parts of inhibitor, 1.3 parts of chain extender, intercalator 0.9
Part, 1.6 parts of compatilizer, 0.8 part of diluent, 1.5 parts of tranquilizer, 1.1 parts of bridging agent, 0.7 part of toughener, 0.6 part of stabilizer, end
Only 0.6 part of agent；
The degasser is stearic acid；
The levelling agent is polyether polyester azo polyether polyeste；
The coupling agent is epoxy silane class coupling agent；
Described adhesive, in units of weight portion, including following raw material：24 parts of nickel aluminide, 17 parts of Titanium Trialuminum, aluminium nitride 15
Part, 6 parts of vanadium, 5 parts of yttrium；
The reinforcing agent is 701 powder reinforcing agents；
The cutting agent in units of weight, including following raw material：28 parts of silicone oil, 17 parts of phthalic acid dibutyl ester, dinonyl naphthalene
16 parts of sodium sulfonate, 2,6- di-t-butyl are to 15 parts of diethylstilbestrol, 13 parts of ethanedioic acid polyester, 12 parts of acrylamide, 10 parts of oleamide, ammonia
5 parts of yl carboxylic acid quasi-chelate compound；
The lubricant, in units of weight, including following raw material：48 parts of polyvinyl isobutyl ether, 14 parts of amide waxe, stearic acid
23 parts of lead, 14 parts of carboxylic acid amide, 16 parts of acrylate, 12 parts of N-Methyl pyrrolidone；
The dispersant in units of weight, including following raw material：32 parts of Polyethylene Glycol, Bi2O35 parts, aminopropyl-triethoxy
9 parts of silane, 15 parts of aluminium carbide, Nb2O56 parts, 13 parts of sulphuric acid tungsten, 30 parts of glycerol monostearate；
The regulator is esters of acrylic acid regulator；
The inhibitor, in units of weight portion, including following raw material：27 parts of tungsten carbide, 19 parts of niobium carbide, 16 parts of tungsten nitride,
12 parts of molybdenum sulfide, 16 parts of cerium fluoride, 12 parts of carbon fiber；
The chain extender is methyl diphenylene diisocyanate；
The intercalator is diethanolamine；
The compatilizer is grafted compatilizer for maleic anhydride；
The diluent is 515- diluent；
The tranquilizer constituent is 0.9 part of ardealite, 0.6 part of ferrum oxide；
The bridging agent is acrylic type bridging agent；
The toughener is chlorinated polyethylene；
The stabilizer is fat acids stabilizer；
The terminator is styrene；
The preparation method of the powder metallurgy material for train brake pad of the high-fire resistance, comprises the following steps：
S1：By copper powder, tungsten powder, ferromanganese breeze, iron powder, Hydrocerussitum (Ceruse), molybdenum disulphide powder, yttrium powder, carbonized titanium powder, carbonization tantalum powder, glass putty,
Silicon dioxide, boron nitride powder, graphite powder, glycerol, stearic acid, boron fibre, carbon fiber are added in blender, in rotating speed are
9min, prepared mixture A is stirred under 351r/min；
S2：By PET resin, carboxymethyl cellulose, polyacrylamide, degasser, levelling agent, coupling agent, binding agent, reinforcing agent,
Cutting agent, lubricant are added in blender and stir 14min, prepared mixture B under rotating speed is for 422r/min；
S3：By mixture B, amide waxe, silicon nitride, epoxypropoxy three obtained in mixture A, step S2 obtained in step S1
Methoxy silane, the sub- manganese of sulfuration, carborundum, HCPE, dispersant, regulator, inhibitor, chain extender, intercalation
Agent, compatilizer, diluent, tranquilizer, bridging agent, toughener, stabilizer, terminator are added in blender, are 307 in temperature
DEG C, rotating speed is to stir 1.5h, prepared mixture C under 500r/min；
S4：Mixture C obtained in step S3 is put into press, the mixture C is sent in default product mold by press,
And green part is pressed under pressure is for 635MPa；
S5：Green part obtained in step S4 is placed in sintering furnace, in the protective atmosphere of hydrogen and nitrogen mixed gas, is first existed
At 718 DEG C, presintering 40min, wherein hydrogen are 2.25 with the volume ratio of nitrogen:95.8, then enter by following liter of mild temperature
Row sintering：
1）With 21 DEG C/min of heating rate, 952 DEG C are warming up to from 718 DEG C, and are incubated 7 min；
2）With 24 DEG C/min of heating rate, 1115 DEG C are warming up to from 952 DEG C, and are incubated 12min；
3）With 12 DEG C/min of heating rate, 1280 DEG C being warming up to from 1115 DEG C, and sinters 138min, prepared work at this temperature
Part；
S6：Workpiece obtained in step S5 is quenched, it is 47min 838 DEG C, cool time that hardening heat is, then to heat up
15 DEG C/min of speed is warming up to 947 DEG C, is incubated 60min, then is tempered, and temperature is that 243 DEG C, tempering insulation time is
69min, prepared materials A；
S7：By materials A obtained in step S6 in carburizer, 885 DEG C being heated in gaseous carburizing medium, is incubated 4.4h,
135 DEG C are then cooled to, are incubated 5.2h, followed by room temperature is cooled to, prepared material B；
S8：Material B obtained in step S7 is sent in steam oven, steam treatment is carried out, vapor (steam) temperature is 748 DEG C, 2.2h is incubated,
Then 3.2h being incubated at 196 DEG C, is finally cooled to room temperature, the powder metallurgy material for train brake pad of prepared high-fire resistance.
The powder metallurgy material for train brake pad for high-fire resistance being obtained to embodiment 1-3 carries out performance test, as a result as follows
Shown in table.
| Embodiment | Friction heat stability | Thermostability | Tensile strength（MPa） | Comprcssive strength（MPa） | Hardness（HB） | Stock utilization（%） | Consistency（%） |
| 1 | Excellent | Excellent | 1317.54 | 208.43 | 76.28 | 94.36 | 94.27 |
| 2 | Excellent | Excellent | 1285.17 | 201.23 | 70.57 | 93.82 | 92.43 |
| 3 | Excellent | Excellent | 1326.57 | 218.45 | 75.19 | 96.14 | 94.78 |
It can be seen that the powder metallurgy material for train brake pad global density of high-fire resistance obtained in the present invention is uniform, consistency
Height, friction heat stability and thermostability are excellent, comprcssive strength and hardness are preferable, stock utilization height.
Above content it cannot be assumed that the present invention be embodied as be confined to these explanations, for the present invention affiliated technology neck
For the those of ordinary skill in domain, without departing from the inventive concept of the premise, some simple deduction or replace can also be made,
The scope of patent protection that the present invention is determined should be all considered as belonging to by the claims that is submitted to.
Claims (7)
1. a kind of powder metallurgy material for train brake pad of high-fire resistance, it is characterised in that in units of weight, including following original
Material：Copper powder 753-1498 part, tungsten powder 36-58 part, ferromanganese breeze 14-27 part, iron powder 15-24 part, Hydrocerussitum (Ceruse) 25-34 part, curing
Molybdenum powder 18-26 part, yttrium powder 13-26 part, carbonized titanium powder 18-29 part, carbonization tantalum powder 14-18 part, glass putty 13-19 part, silicon dioxide
5-12 part, boron nitride powder 12-18 part, graphite powder 7-13 part, glycerol 23-32 part, stearic acid 9-18 part, boron fibre 14-23 part, carbon
Fiber 6-13 part, PET resin 7-12 part, carboxymethyl cellulose 14-17 part, polyacrylamide 8-15 part, amide waxe 13-25 part,
Silicon nitride 6-9 part, glycidoxy-propyltrimethoxy silane 5-12 part, the sub- manganese 10-14 part of sulfuration, carborundum 6-9 part, high chlorination
Polyvinyl resin 4-6 part, degasser 0.6-0.9 part, levelling agent 0.5-0.8 part, coupling agent 0.6-1.2 part, binding agent 1.4-3.2
Part, reinforcing agent 0.9-1.5 part, cutting agent 0.8-1.2 part, lubricant 0.9-1.6 part, dispersant 0.7-0.9 part, regulator 0.6-
0.8 part, inhibitor 1-1.4 part, chain extender 0.7-1.3 part, intercalator 0.6-0.9 part, compatilizer 1.2-1.6 part, diluent
0.5-0.8 part, tranquilizer 0.9-1.5 part, bridging agent 0.6-1.1 part, toughener 0.5-0.7 part, stabilizer 0.3-0.6 part, end
Only agent 0.4-0.6 part；
The degasser is stearic acid；
The levelling agent is polyether polyester azo polyether polyeste；
The coupling agent is epoxy silane class coupling agent；
Described adhesive, in units of weight portion, including following raw material：Nickel aluminide 19-24 part, Titanium Trialuminum 12-17 part, nitridation
Aluminum 10-15 part, vanadium 4-6 part, yttrium 3-5 part；
The reinforcing agent is 701 powder reinforcing agents；
The cutting agent in units of weight, including following raw material：Silicone oil 24-28 part, phthalic acid dibutyl ester 12-17 part, two
Nonyl sodium naphthalene sulfonate 9-16 part, 2,6- di-t-butyl are to diethylstilbestrol 12-15 part, ethanedioic acid polyester 11-13 part, acrylamide 9-12
Part, oleamide 8-10 part, amino carboxylic acid quasi-chelate compound 3-5 part；
The lubricant, in units of weight, including following raw material：Polyvinyl isobutyl ether 23-48 part, amide waxe 9-14 part,
Lead stearate 15-23 part, carboxylic acid amide 7-14 part, acrylate 13-16 part, N-Methyl pyrrolidone 8-12 part；
The dispersant in units of weight, including following raw material：Polyethylene Glycol 25-32 part, Bi2O33-5 part, three second of aminopropyl
TMOS 6-9 part, aluminium carbide 10-15 part, Nb2O54-6 part, sulphuric acid tungsten 10-13 part, glycerol monostearate 20-30 part；
The regulator is esters of acrylic acid regulator；
The inhibitor, in units of weight portion, including following raw material：Tungsten carbide 20-27 part, niobium carbide 14-19 part, tungsten nitride
12-16 part, molybdenum sulfide 10-12 part, cerium fluoride 13-16 part, carbon fiber 9-12 part；
The tranquilizer constituent is ardealite 0.5-0.9 part, ferrum oxide 0.4-0.6 part；
The stabilizer is fat acids stabilizer；
The terminator is styrene；
The preparation method of the powder metallurgy material for train brake pad of the high-fire resistance, comprises the following steps：
S1：By copper powder, tungsten powder, ferromanganese breeze, iron powder, Hydrocerussitum (Ceruse), molybdenum disulphide powder, yttrium powder, carbonized titanium powder, carbonization tantalum powder, glass putty,
Silicon dioxide, boron nitride powder, graphite powder, glycerol, stearic acid, boron fibre, carbon fiber are added in blender, are 128- in rotating speed
9-14min, prepared mixture A is stirred under 351r/min；
S2：By PET resin, carboxymethyl cellulose, polyacrylamide, degasser, levelling agent, coupling agent, binding agent, reinforcing agent,
Cutting agent, lubricant are added in blender and stir 14-23min, prepared mixture B under rotating speed is for 219-422r/min；
S3：By mixture B, amide waxe, silicon nitride, epoxypropoxy three obtained in mixture A, step S2 obtained in step S1
Methoxy silane, the sub- manganese of sulfuration, carborundum, HCPE, dispersant, regulator, inhibitor, chain extender, intercalation
Agent, compatilizer, diluent, tranquilizer, bridging agent, toughener, stabilizer, terminator are added in blender, in temperature are
262-307 DEG C, rotating speed is to stir 1.5-3.5h, prepared mixture C under 300-500r/min；
S4：Mixture C obtained in step S3 is put into press, the mixture C is sent in default product mold by press,
And green part is pressed under pressure is for 612-635MPa；
S5：Green part obtained in step S4 is placed in sintering furnace, in the protective atmosphere of hydrogen and nitrogen mixed gas, is first existed
At 702-718 DEG C, presintering 40-46min, wherein hydrogen are 1.16-2.25 with the volume ratio of nitrogen:90.6-95.8, then presses
Hereinafter rise mild temperature to be sintered：
1）With 14-21 DEG C/min of heating rate, 918-952 DEG C being warming up to from 702-718 DEG C, and is incubated 7-10 min；
2）With 19-24 DEG C/min of heating rate, 1020-1115 DEG C is warming up to from 918-952 DEG C, and is incubated 12-16min；
3）With 10-12 DEG C/min of heating rate, 1230-1280 DEG C is warming up to from 1020-1115 DEG C, and sinters at this temperature
138-145min, prepared workpiece；
S6：Workpiece obtained in step S5 is quenched, it is 35-47min 822-838 DEG C, cool time that hardening heat is, then
939-947 DEG C is warming up to 8-15 DEG C/min of heating rate, 60-71min is incubated, then is tempered, temperature is 232-
243 DEG C, tempering insulation time is 69-74min, prepared materials A；
S7：By materials A obtained in step S6 in carburizer, 863-885 DEG C is heated in gaseous carburizing medium, insulation
4.4-5.1h, is then cooled to 122-135 DEG C, is incubated 5.2-6.4h, followed by being cooled to room temperature, prepared material B；
S8：Material B obtained in step S7 is sent in steam oven, steam treatment is carried out, vapor (steam) temperature is 693-748 DEG C, to be incubated
2.2-3.1h, is then incubated 3.2-3.5h at 184-196 DEG C, is finally cooled to room temperature, the train brake pad of prepared high-fire resistance
Use powdered metallurgical material.
2. the powder metallurgy material for train brake pad of high-fire resistance according to claim 1, it is characterised in that the chain extension
Agent is methyl diphenylene diisocyanate.
3. the powder metallurgy material for train brake pad of high-fire resistance according to claim 1, it is characterised in that the intercalation
Agent is diethanolamine.
4. the powder metallurgy material for train brake pad of high-fire resistance according to claim 1, it is characterised in that described compatible
Agent is grafted compatilizer for maleic anhydride.
5. the powder metallurgy material for train brake pad of high-fire resistance according to claim 1, it is characterised in that the dilution
Agent is 515- diluent.
6. the powder metallurgy material for train brake pad of high-fire resistance according to claim 1, it is characterised in that the bridge formation
Agent is acrylic type bridging agent.
7. the powder metallurgy material for train brake pad of high-fire resistance according to claim 1, it is characterised in that described toughness reinforcing
Agent is chlorinated polyethylene.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109369064A (en) * | 2018-12-09 | 2019-02-22 | 马鞍山市雷狮轨道交通装备有限公司 | A kind of sub- production technology of ultralow-porosity high densification grinding |
| CN112548090A (en) * | 2020-11-27 | 2021-03-26 | 无锡科宇模具有限公司 | Preparation method of high-temperature alloy part |
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| CN101623759A (en) * | 2009-08-17 | 2010-01-13 | 刘丽蓉 | Powder metallurgic material for brake pad of high-speed electric multiple unit |
| CN102011043A (en) * | 2010-12-30 | 2011-04-13 | 北京瑞斯福科技有限公司 | Preparation method of powder metallurgy material for train brake pad |
| CN105945276A (en) * | 2016-07-27 | 2016-09-21 | 黄宇 | Novel high-performance metallurgy powder |
| CN106011664A (en) * | 2016-07-27 | 2016-10-12 | 黄宇 | High-performance powder metallurgical transmission gear |
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2016
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3891398A (en) * | 1972-01-20 | 1975-06-24 | Ferodo Ltd | Disc brake pads formed from two sintered metallic layers |
| CN101623759A (en) * | 2009-08-17 | 2010-01-13 | 刘丽蓉 | Powder metallurgic material for brake pad of high-speed electric multiple unit |
| CN102011043A (en) * | 2010-12-30 | 2011-04-13 | 北京瑞斯福科技有限公司 | Preparation method of powder metallurgy material for train brake pad |
| CN105945276A (en) * | 2016-07-27 | 2016-09-21 | 黄宇 | Novel high-performance metallurgy powder |
| CN106011664A (en) * | 2016-07-27 | 2016-10-12 | 黄宇 | High-performance powder metallurgical transmission gear |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109369064A (en) * | 2018-12-09 | 2019-02-22 | 马鞍山市雷狮轨道交通装备有限公司 | A kind of sub- production technology of ultralow-porosity high densification grinding |
| CN109369064B (en) * | 2018-12-09 | 2022-02-11 | 马鞍山市雷狮轨道交通装备有限公司 | Production process of grinding mill with ultralow porosity and high densification degree |
| CN112548090A (en) * | 2020-11-27 | 2021-03-26 | 无锡科宇模具有限公司 | Preparation method of high-temperature alloy part |
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