Alloy cast steel for high speed train brake disc, heat treatment method thereof and high speed train brake disc manufactured by the alloy cast steel

Abstract

The invention discloses an alloy cast steel for a high speed train brake disc, a heat treatment method thereof and a high speed train brake disc manufactured by the alloy cast steel. The alloy cast steel is composed of the following components in percentage by weight: 0.18-0.26% of carbon, 0.16-0.50% of silicon, 0.55-1.40% of manganese, not larger than 0.03% of phosphorus, not larger than 0.03% of sulfur, 0.90-2.00% of chromium, 0.71-1.80% of nickel, 0.65-1.20% of molybdenum, 0.20-0.35% of vanadium, not larger than 0.30% of other components, smaller than 0.1% of tungsten and the balance of ferrum; and the heat treatment method comprises two steps of normalizing and tempering. The alloy cast steel disclosed by the invention has the beneficial effects that such alloy elements as manganese, nickel, chromium, molybdenum, vanadium, and the like, and such main components in the cast steel material as carbon, silicon and the like are reasonably mixed and are effectively thermally treated to refine the crystalline grain and improve the hardenability and heat resistant properties of the alloy cast steel material, and the normal temperature strength and the high temperature strength are greatly improved, so that the alloy cast steel material has excellent comprehensive mechanical properties. A brake disc manufactured by the alloy cast steel can meet the application requirements of high speed trains.

Description

technical field [0001] The invention relates to an alloy cast steel used for a high-speed train brake disc, a heat treatment method thereof and a high-speed train brake disc manufactured from the alloy cast steel, belonging to the technical field of alloy steel materials. Background technique [0002] The brake disc is an important part of the high-speed train braking system, especially for 250Km / h and higher-speed EMUs. The quality and performance of the brake disc directly affect the performance indicators of the EMU. The biggest influence on the quality and performance of the brake disc is the various mechanical performance indicators of the alloy cast steel material used in the brake disc. The cast steel brake discs of domestic high-speed trains mainly rely on imports, which are expensive. [0003] Therefore, in order to meet the needs of the development of high-speed railways in my country, it is particularly urgent to develop a high-speed train brake disc material all...

AI Technical Summary

Problems solved by technology

The existing domestic high-speed train cast steel brake discs mainly rely on imports, and the price is expensive

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