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Powder metallurgy friction material for high-speed train braking and preparation method of powder metallurgy friction material

A technology of powder metallurgy and friction materials, which is applied in the field of powder metallurgy materials, can solve the problems that synthetic friction materials cannot meet the technical requirements and the wear performance requirements are very strict, so as to improve its own shear strength and compressive strength, excellent mechanical properties, Effect of improving high temperature friction performance

Inactive Publication Date: 2019-03-26
BEIJING TIANRENDAOHE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As the latest generation of transportation in the current society, high-speed rail has great advantages in terms of operating speed, transportation capacity, energy saving and environmental protection. Facing the rapidly growing transportation demand in the domestic and international markets, my country has developed a 200 - 250km / h, 300-350km / h high-speed trains of various types, especially the speed increase of the Chinese standard EMU, for example, the speed of the Fuxing has been increased to 350km / h, and the brake pads of the high-speed train are rubbed during the braking process The temperature generated by the material is very high, and the highest instantaneous temperature can reach 500-900°C. Therefore, the requirements for the friction and wear performance of the brake friction material are very strict. In the high-speed train with a speed level of 250-350km / h, the synthetic friction material can no longer meet the requirements. technical requirements, both at home and abroad have all used powder metallurgy friction materials for braking

Method used

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  • Powder metallurgy friction material for high-speed train braking and preparation method of powder metallurgy friction material
  • Powder metallurgy friction material for high-speed train braking and preparation method of powder metallurgy friction material
  • Powder metallurgy friction material for high-speed train braking and preparation method of powder metallurgy friction material

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Embodiment 1

[0031] This embodiment provides a powder metallurgy friction material for high-speed train braking, specifically as follows:

Embodiment 5

[0032] The present embodiment 5kg includes the following raw materials: copper powder 2750g, iron powder 500g, copper-plated flake graphite 600g, copper-plated graphite particles 450g, ferrochrome powder 500g, molybdenum disulfide powder 100g, alumina fiber 100g;

[0033] Wherein, the copper powder is electrolytic copper powder, and the particle size distribution range is 50-100 mesh;

[0034] The iron powder adopts atomized iron powder, and the particle size distribution range is 50-100 mesh;

[0035] The copper-coated flake graphite adopts artificial copper-plated flake graphite by electroless plating, the copper content is 40wt%, and the particle size distribution range is 20-80 mesh; the copper-coated graphite particle copper content is 25wt%;

[0036] The particle size distribution range of the molybdenum disulfide is 100-150 mesh;

[0037] The particle size distribution range of the ferrochromium powder is 80-150 mesh, and the chromium content is 50wt%, and the iron con...

Embodiment 2

[0042] This embodiment provides a powder metallurgy friction material for high-speed train braking, specifically as follows:

[0043] The present embodiment 5kg includes the following raw materials: copper powder 2250g, iron powder 1000g, copper-plated flake graphite 600g, copper-plated graphite particles 400g, ferrochrome powder 500g, molybdenum disulfide powder 150g, alumina fiber 100g;

[0044] Wherein, the copper powder is electrolytic copper powder, and the particle size distribution range is 50-100 mesh;

[0045] The iron powder is atomized iron powder, and the particle size distribution range is 150-200 mesh;

[0046] The copper-coated graphite flakes are copper-plated with artificial graphite flakes by electroless plating, and the copper content is 42wt%, and the particle size distribution range is 80-120 mesh; the copper-coated graphite particles have a copper content of 28wt%;

[0047] The particle size distribution range of the molybdenum disulfide is 250-300 mesh;...

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Abstract

The invention relates to the technical field of brake materials, in particular to a powder metallurgy friction material for high-speed train braking and a preparation method of the powder metallurgy friction material. The powder metallurgy friction material is prepared from the following raw materials: copper powder, iron powder, copper-plated flake graphite, copper-plated graphite granules, chromium iron powder, molybdenum disulfide powder and alumina fiber through a powder metallurgy process. The powder metallurgy friction material has good mechanical properties, and is stable in friction coefficient, small in abrasion loss and good in thermal failure resistance; through the adopted raw materials and the ratio, the friction material with excellent properties can be prepared at the relatively-low sintering pressure and temperature, energy consumption is saved, a preparing process is simple and easy to control, the performance is excellent, and good application prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy materials, in particular to a powder metallurgy friction material for high-speed train braking and a preparation method thereof. Background technique [0002] As the latest generation of transportation in the current society, high-speed rail has great advantages in terms of operating speed, transportation capacity, energy saving and environmental protection. Facing the rapidly growing transportation demand in the domestic and international markets, my country has developed a 200 - 250km / h, 300-350km / h high-speed trains of various types, especially the speed increase of the Chinese standard EMU, for example, the speed of the Fuxing has been increased to 350km / h, and the brake pads of the high-speed train are rubbed during the braking process The temperature generated by the material is very high, and the highest instantaneous temperature can reach 500-900°C. Therefore, the requirements for ...

Claims

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Application Information

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IPC IPC(8): C22C49/02C22C47/14B22F1/00B22F3/16C22C101/04
Inventor 吴佩芳释加才让魏东彬曹静武胡晨龙波
Owner BEIJING TIANRENDAOHE NEW MATERIAL CO LTD
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