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Powder metallurgic material for brake pad of high-speed electric multiple unit

A technology of high-speed EMUs and brake pads, applied in friction linings, mechanical equipment, etc., can solve the problems of poor wear resistance, low strength of synthetic materials, poor heat resistance, etc., and achieve strong wear resistance, mechanical Effects of increased strength, improved heat capacity, and wear resistance

Inactive Publication Date: 2010-01-13
丁艳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a powder metallurgy material for high-speed EMU brake pads, which can effectively solve the defects of existing synthetic materials such as low strength, poor heat resistance, and poor wear resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The powder metallurgy materials used for the brake pads of high-speed EMUs include the following components by weight: 55% copper, 7% tin, 2% zinc, 7% iron, 1% silicon dioxide, 8% molybdenum trioxide, three Aluminum oxide 7% and carbon 13%.

[0015] The mechanical properties of the powder metallurgy material obtained according to the above composition at room temperature are as follows: the hardness HB is 24.6, and the compressive strength is 35.3MPa.

Embodiment 2

[0017] The powder metallurgy materials used for brake pads of high-speed EMUs include the following components by weight percentage: 70% copper, 2% tin, 6% zinc, 1% iron, 5% silicon dioxide, 4% molybdenum trioxide, three Aluminum oxide 6% and carbon 6%.

[0018] The mechanical properties of the powder metallurgy material obtained according to the above composition at room temperature are as follows: the hardness HB is 20.9, and the compressive strength is 33.9MPa.

Embodiment 3

[0020] The powder metallurgy materials used for the brake pads of high-speed EMUs include the following components by weight: 64% copper, 5% tin, 5% zinc, 4% iron, 3% silicon dioxide, 6% molybdenum trioxide, trioxide Aluminum oxide 3% and carbon 10%.

[0021] The mechanical properties of the powder metallurgy material obtained according to the above composition at room temperature are as follows: the hardness HB is 22.6, and the compressive strength is 37.4MPa.

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PUM

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Abstract

The invention relates to a powder metallurgic material for a brake pad of high-speed electric multiple units, which comprises the following components in percentage by weight: 55-70 percent of copper, 2-7 percent of tin, 2-6 percent of zinc, 1-7 percent of iron, 1-5 percent of silicon dioxide, 4-8 percent of molybdenum trioxide, 3-7 percent of aluminium oxide, 6-13 percent of carbon, one or more of 5-9 percent of nickel, 4-7 percent of tungsten and 1-6 percent of lead. The powder metallurgic material for the brake pad of the high-speed electric multiple units has higher friction heat resistance, stable friction coefficients, stronger wearing resistance and better thermophysical stability; meanwhile, the mechanical strength is also markedly improved, and the powder metallurgic material can satisfy a braking requirement when the high-speed electric multiple units run at high speed.

Description

technical field [0001] The invention relates to a material of a brake pad, in particular to a powder metallurgy material used for a brake pad of a high-speed EMU. Background technique [0002] The introduction and localization of high-speed EMUs have made my country's railway industry develop by leaps and bounds. In actual operation, a stable and good braking system is the guarantee for the high-speed operation of high-speed EMUs. With the continuous improvement of the running speed of high-speed EMUs, the braking load of the train has also increased significantly, which puts forward higher requirements for the braking system of the train. The brake pad is one of the important parts of the braking system of the high-speed EMU. When the train brakes, the brake pad can absorb kinetic energy and convert the kinetic energy into heat energy and dissipate it into the air. Destructive wear cannot damage the brake friction pair components. [0003] The existing train brake pads i...

Claims

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Application Information

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IPC IPC(8): B22F1/00C22C9/02C22C9/00C22C9/06F16D69/02
Inventor 刘丽蓉
Owner 丁艳
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