Friction filler, friction material composition, friction material and application thereof

A friction material and composition technology, applied in the field of friction materials, can solve the problems of poor elimination of polygonal contours on the surface of wheels, limited cleaning and repairing effect of abrasive materials, insufficient wear resistance of abrasive sub-materials, etc., to improve cleaning ability and Reshaping ability, avoiding harmful thermal effects, eliminating micro cracks and wheel out-of-roundness effect

Active Publication Date: 2021-12-17
ZONGHENG TIANJIN SCI & TECH DEV CO LTD OF CHINA ACADEMY OF RAILWAY SCI +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing grinding sub-materials of tread cleaners have the following problems during use: 1. Metal inlays that are harmful to wheels are prone to appear in wet, rainy and snowy environments; Noise occurs during the process; 3. The abrasive sub-material is prone to thermal cracks during frequent and repeated braking, so that the cracks expand to form abrasive material pieces; 4. The abrasive material has limited cleaning and repair effects, and the effect of eliminating polygonal contours on the wheel surface is not good. Good; 5. The wear resistance of the abrasive sub-material is insufficient

Method used

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  • Friction filler, friction material composition, friction material and application thereof
  • Friction filler, friction material composition, friction material and application thereof
  • Friction filler, friction material composition, friction material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] This embodiment provides a friction material, the preparation method of which includes:

[0074] 1. Weigh 350g of nitrile rubber powder, 1150g of phenolic resin powder, 840g of barium sulfate, 430g of flake graphite, 550g of copper fiber, 183g of copper filings, 310g of reduced iron powder, 150g of zirconium dioxide, 200g of white corundum, 240g of cryolite, chlorine 22g fatty acid ester, 220g potassium feldspar, 35g zinc oxide, 35g accelerator, 35g stearic acid, 35g sulfur.

[0075] 2. Pour the weighed raw materials into the production-type double-cone high-speed mixer, and add toluene whose mass is 1% of the total mass of the above-mentioned raw materials at the same time, set the machine speed to 60 rpm, mix for 35 minutes, and mix well. The obtained mixture was hot-pressed with a 315-ton hydraulic press, with a molding pressure of 30 MPa, a hot-pressing temperature of 160° C., and a hot-pressing time of 35 minutes. After hot-press forming, according to the set curi...

Embodiment 2

[0080] This embodiment provides a friction material, the preparation method of which includes:

[0081] 1. Weigh 400g of nitrile rubber powder, 1100g of phenolic resin powder, 760g of barium sulfate, 460g of flake graphite, 600g of copper fiber, 201g of copper filings, 330g of reduced iron powder, 120g of zirconium dioxide, 220g of white corundum, 230g of cryolite, chlorine 24g fatty acid ester, 200g potassium feldspar, 40g zinc oxide, 40g accelerator, 40g stearic acid, 40g sulfur.

[0082] 2. Pour the weighed raw materials into the production-type double-cone high-speed mixer, set the machine speed to 60 rpm, and mix for 35 minutes. After mixing evenly, use the 315-ton hydraulic press to hot-press the above-mentioned mixture to form it. The pressure is 30MPa, the hot-pressing temperature is 160°C, and the hot-pressing time is 35min. After hot-press forming, according to the set curing program, use an oven to perform secondary curing on the hot-press-formed material to obtain...

Embodiment 3

[0087] The present embodiment provides a friction material, and its preparation method includes:

[0088] 1. Weigh nitrile rubber powder 450g, phenolic resin powder 1050g, barium sulfate 680g, flake graphite 490g, copper fiber 650g, copper filings 226g, reduced iron powder 360g, zirconium dioxide 140g, white corundum 180g, cryolite 210g, chlorine Fatty acid ester 29g, potassium feldspar 180g, zinc oxide 45g, accelerator 45g, stearic acid 45g, sulfur 45g.

[0089] 2. Pour the weighed raw materials into the produced double-cone high-speed mixer, and at the same time add toluene whose mass is 1% of the total mass of the above raw materials, set the machine speed to 60 rpm, and mix for 35 minutes. The formed mixture was hot-pressed with a 315-ton hydraulic press, the molding pressure was 30 MPa, the hot-pressing temperature was 160° C., and the hot-pressing time was 35 minutes. After hot-pressing molding, the material after hot-pressing molding is secondary-cured in an oven accor...

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Abstract

The invention provides a friction filler, a friction material composition, a friction material and application thereof. The friction filler is prepared from the following components in parts by weight: 14.6 to 18.1 parts of barium sulfate, 9.2 to 10.6 parts of crystalline flake graphite, 3.9 to 4.9 parts of metal filing, 6.6 to 7.8 parts of reduced iron powder, 2.5 to 3.3 parts of zirconium dioxide, 3.3 to 4.8 parts of white corundum, 4.5 to 5.2 parts of cryolite, 0.47 to 0.63 part of chlorinated fatty acid and 3.8 to 4.7 parts of potassium feldspar. The invention also provides a friction material composition comprising an adhesive, reinforcing fibers and the friction filler. The invention further provides a friction material prepared from the friction material composition and application of the friction material in wheel tread cleaning of railway vehicles. The friction material can effectively improve the wheel-rail adhesion coefficient, has a modification effect on wheels, prolongs the overall service life of the wheels and improves the dynamic state between the wheels and the rails.

Description

technical field [0001] The invention relates to the technical field of application of wheel tread cleaning friction for rail vehicles, in particular to friction fillers, friction material compositions, friction materials and their applications suitable for wheel tread cleaning. Background technique [0002] During the operation of the rail vehicle, the braking friction force and traction friction force of the vehicle depend on the adhesion coefficient between the wheel and rail. The braking and traction design of the rail vehicle are based on the corresponding wheel-rail adhesion. Avoid wheel slippage and idling, and reduce the probability of wheel and rail damage. Due to the diversification of the operating environment, there are various pollutants between the wheels and the rails. At the same time, due to the wide and complex sources of pollutants, the adhesion coefficient between the wheels and rails will decrease, which may cause the wheels to slide during the braking pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/30C08K3/04C08K3/08C08K3/22C08K3/16C08K5/095C08L61/06C08L9/02C08K7/06C08K13/04
CPCC08L61/06C08K2003/3045C08K2003/085C08K2003/0856C08K2003/2244C08K2003/2227C08L9/02C08K13/04C08K7/06C08K3/30C08K3/04C08K3/08C08K3/22C08K3/16C08K5/095
Inventor 张国文张静孙振龙陈德峰马运章赵春光吴智强
Owner ZONGHENG TIANJIN SCI & TECH DEV CO LTD OF CHINA ACADEMY OF RAILWAY SCI
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