Metallurgical friction material for high and cold area high-speed train brake pad

Abstract

A metallurgical friction material for high-speed train brake pads in alpine regions of the present invention relates to the field of powder metallurgy materials and is composed of the following components in parts by weight: 30-70 parts of copper, 10-30 parts of iron, 5-30 parts of graphite 20 parts, 1-20 parts of zirconia, 1-10 parts of molybdenum disulfide, 3-5 parts of silicon carbide, 1-5 parts of tin, 1-5 parts of manganese, 1-5 parts of nickel, 0.5-5 parts of ferrochromium, 1.5-3.5 parts of aluminosilicate ore powder. A metallurgical friction material for brake pads of high-speed trains in alpine regions according to the present invention is suitable for making brake pads for high-speed trains in high-cold regions. Compared with the existing metallurgical friction materials, silicon carbide and mullite are added. These two ingredients improve the product's ability to resist heat fading, avoiding the possible heat fading phenomenon of brake pads in alpine regions, and greatly ensuring the safety of high-speed trains in alpine regions. At the same time, they can obtain good physical and mechanical properties and stability. friction and wear performance.

Description

technical field [0001] The invention relates to the field of powder metallurgy materials, in particular to a metallurgical friction material for high-speed train brake pads in alpine regions. Background technique [0002] High-speed trains refer to railway trains whose maximum speed reaches or exceeds 200km / h. With the maturity of my country's high-speed rail technology, my country's first high-speed train line in the alpine region was officially opened in 2015. The alpine region has extremely high requirements for rails and high-speed trains, especially the train braking system; for example, the application number is CN201510137685. 9, a powder metallurgy friction material for high-speed train brake pads and its preparation method, which uses zirconia and ferrochrome as friction elements, although it can provide a stable friction coefficient and meet the braking torque required by braking, However, in the alpine region, the temperature is low, and the thermal decay ability o...

AI Technical Summary

Problems solved by technology

With the maturity of my country's high-speed rail technology, my country's first high-speed train line in the alpine region was officially opened in 2015. The alpine region has extremely high requirements for rails and high-speed trains, especially the train braking system; for example, the application number is CN201510137685. 9, a powder metallurgy friction material for high-speed train brake pads and its preparation method, which uses zirconia and ferrochrome as friction elements, although it can provide a stable friction coefficient and meet the braking torque required by braking, However, in the alpine region, the temperature is low, and the thermal decay ability of the brake pads is reduced. At the same time, the brake pads must be able to bear the huge load generated by the high-speed train and convert kinetic energy into heat energy and dissipate it. This leads to the existing The braking effect of the brake pads is not good, and there are certain safety hazards