Copper-based powder metallurgical friction material for brake of high-speed train

A brake friction material, powder metallurgy technology, applied in friction linings, mechanical equipment, other chemical processes, etc., to achieve the effect of reducing use and maintenance costs, low wear rate, and sufficient strength

Inactive Publication Date: 2018-11-30
JIANGYIN HENGDING SPECIAL STEEL PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Porous, semi-dense or fully dense materials and products can be directly made by using powder metallurgy technology. Powder metallurgy products have unique chemical composition and mechanical and physical properties, which cannot be obtained by traditional melting and casting methods.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the following composition: Cu: 50%, Ni: 2%, Sn: 2.5%, Fe: 16%, Cr: 4%, Mo: 4.5%, W: 3%, MgO: 1.5%, ZrO 2 : 1.5%, MoO 3 : 1%, Ti: 2.5% and C: 11.5% to prepare the mixture, the mixture adopts a V-shaped mixer, and in order to avoid segregation, add a small amount of engine oil, the mixing time is 2.5h, and mix well; the pressing adopts a special hydraulic press for powder metallurgy Forming, forming and pressing pressure is controlled at 5.2MPa; sintering adopts a bell furnace, the sintering temperature is 940°C, the sintering time is 3h, and decomposed ammonia is used as the protective atmosphere.

[0023] Using MM3000 friction and wear testing machine to test the above friction materials, at a speed equivalent to 350km / h, the friction coefficient is 0.334, and the average wear amount is 0.21cm 3 / MJ.

Embodiment 2

[0025] According to the following composition Cu: 52%, Ni: 1.5%, Sn: 1.5%, Fe: 19%, Cr: 2%, Mo: 4%, W: 2.5%, MgO: 1.2%, ZrO 2 : 1.3%, MoO 3 : 0.5%, Ti: 1.5% and C: 13% to prepare the mixture. V-shaped mixing machine is used for the mixture, and in order to avoid segregation, a small amount of engine oil is added, and the mixing time is 2 hours, and the mixture is fully mixed; the pressing is formed by a special hydraulic press for powder metallurgy, and the forming pressing pressure is controlled at 5MPa; the sintering adopts a bell furnace, and the sintering temperature is 950°C, the sintering time is 2.5h, and the decomposed ammonia is used as the protective atmosphere.

[0026] Using MM3000 friction and wear testing machine to test the above friction materials, at a speed equivalent to 350km / h, the friction coefficient is 0.346, and the average wear amount is 0.22cm 3 / MJ.

Embodiment 3

[0028] According to the following composition Cu: 53%, Ni: 1.5%, Sn: 2%, Fe: 17%, Cr: 3%, Mo: 3.5%, W: 3%, MgO: 1%, ZrO 2 : 1.5%, MoO 3 : 0.5%, Ti: 2% and C: 12% to prepare the mixture. V-shaped mixing machine was used for the mixture, a small amount of engine oil was added, and the mixing time was 2.5 hours; the forming and pressing was formed by a special hydraulic press for powder metallurgy, and the pressing pressure was controlled at 5.6MPa; the sintering was carried out in a bell furnace with a sintering temperature of 960 °C and a sintering time of 2.5h, using decomposed ammonia as the protective atmosphere.

[0029] Using MM3000 friction and wear testing machine to test the above friction materials, at a speed equivalent to 350km / h, the friction coefficient is 0.346, and the average wear amount is 0.23cm 3 / MJ.

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Abstract

The invention discloses a copper-based powder metallurgical friction material for brake. The copper-based powder metallurgical friction material mainly comprises the following components of 50 to 55%of Cu (copper), 1 to 2% of Ni (nickel), 1.5 to 2.5% of Sn (selenium), 16 to 20% of Fe (iron), 2 to 4% of Cr (chromium), 3 to 4.5% of Mo (molybdenum), 2 to 3% of W (tungsten), 1 to 1.5% of MgO (magnesium oxide), 1 to 1.5% of ZrO2 (zirconium dioxide), 0.5 to 1% of MoO3 (molybdenum trioxide), 1.5 to 2.5% of Ti (titanium), and 9 to 13% of C (carbon). The copper-based powder metallurgical friction material has the advantages that by adopting the particular design on proportional ratio of raw materials and components, the comprehensive property is excellent; the brake requirement of a high-speed train can be met, and the use and maintenance cost of the high-speed train is reduced.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a copper-based powder metallurgy braking friction material with a unique formulation that can greatly improve friction performance. Background technique [0002] Powder metallurgy friction material is based on metal powder, adding appropriate amount of lubricating components and friction components, and is manufactured by powder metallurgy technology. It has been widely used in transportation, machinery, electronics, aerospace, weapons, biology, new energy, Information and nuclear industry and other fields have become one of the most dynamic branches in new material science. Porous, semi-dense or fully dense materials and products can be directly made by using powder metallurgy technology. Powder metallurgy products have unique chemical composition and mechanical and physical properties, which cannot be obtained by traditional melting and casting methods. [0003] In t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C09K3/14C22C9/00F16D69/02
CPCB22F1/0003C09K3/149C22C9/00F16D69/027
Inventor 韩建国
Owner JIANGYIN HENGDING SPECIAL STEEL PROD CO LTD
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