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Alloy cast steel for high-speed train brake disc and its heat treatment method, and high-speed train brake disc manufactured from the alloy cast steel

A technology of alloy cast steel and high-speed trains, which is applied in the field of alloy steel materials, can solve the problems of high price, achieve the effects of small deformation and crack tendency, improve high temperature strength and plasticity, and increase tensile strength

Active Publication Date: 2016-05-25
CRRC QISHUYAN INSTITUTE CO LTD +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • Alloy cast steel for high-speed train brake disc and its heat treatment method, and high-speed train brake disc manufactured from the alloy cast steel
  • Alloy cast steel for high-speed train brake disc and its heat treatment method, and high-speed train brake disc manufactured from the alloy cast steel
  • Alloy cast steel for high-speed train brake disc and its heat treatment method, and high-speed train brake disc manufactured from the alloy cast steel

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Embodiment Construction

[0050] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of specific embodiments. However, those skilled in the art will appreciate that the detailed description herein with reference to the accompanying drawings is for illustrative purposes only, and the present invention is not limited thereto.

[0051] Table 1 The chemical composition range (weight percent content %) of alloy cast steel of the present invention

[0052]

[0053] The components of the alloy cast steel of the present invention and the weight percentage ranges of each component are shown in Table 1.

[0054] The specific technical solution is: an alloy cast steel for high-speed train brake discs, its components and the weight percentages of each component are as follows: carbon 0.18-0.26%, silicon 0.16-0.50%; manganese 0.55-1.40% %; phosphorus less than or equal to 0.03%; sulfur less than or equal t...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C38/48C22C38/44C22C38/46C21D1/28C21D1/25C21D1/18
Inventor 钱坤才金文伟郭晓晖严运涛徐建国李伟郭立宾张勋林郑剑云王阳阙红波
Owner CRRC QISHUYAN INSTITUTE CO LTD
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