Alloy cast steel for high-speed train brake discs and high-speed train brake discs made of the alloy cast steel

Abstract

The invention discloses an alloy cast steel used for a high-speed train brake disc and a high-speed train brake disc made of the alloy cast steel, its components and the weight percentage of each component are: according to claim 1 The alloy cast steel is characterized in that its components and the weight percentage of each component are: carbon 0.18-0.26%; silicon 0.30-0.50%; manganese 0.68-1.40%; phosphorus ≤ 0.025%; sulfur ≤0.013%; chromium 1.10~1.82%; nickel 0.90~1.50%; molybdenum 0.65~1.02%; The beneficial effects of the present invention are mainly reflected in: through the reasonable proportioning and heat treatment of alloying elements such as manganese, nickel, chromium, molybdenum, vanadium and the main components such as carbon and silicon in the cast steel material, the crystal grains are refined and the alloy casting is improved. The hardenability and thermal strength of the steel material, and the normal temperature strength and high temperature strength have been greatly improved, and it has excellent comprehensive mechanical properties. The brake disc manufactured by it can fully meet the technical requirements for the use of high-speed trains under working conditions.

Description

technical field [0001] The application date is 2012.6.28, the application number is 201210217930.3, and the name of the invention is alloy cast steel for high-speed train brake discs and its heat treatment method, and a divisional application for high-speed train brake discs made of the alloy cast steel . [0002] The invention relates to an alloy cast steel used for a high-speed train brake disc and a high-speed train brake disc manufactured from the alloy cast steel. Background technique [0003] 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. When a high-speed train needs to be braked, the greatest impact on the quality and performance of the brake disc is the mechanical performance indicators and crack resistance of the alloy cast steel material used for the brake disc. [0004] Japanese patent do...

AI Technical Summary

Problems solved by technology

[0004] Japanese patent document JP 2005-36312 provides a kind of brake disc steel and disc brake device which are suitable for wear resistance and toughness when running at a high speed of 200 km / h. The composition ratio of disc steel materials is very wide, therefore, the overall performance of the obtained brake disc materials, especially in terms of crack resistance, often cannot meet the braking requirements of higher speed trains

At present, the cast steel brake discs of domestic high-speed trains mainly rely on imports, and the prices are expensive

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