Alloy forged steel and its heat treatment method and use

A heat treatment method and alloy technology, applied in brake parts and other directions, can solve the problems of reduced plasticity and toughness of materials, unreasonable matching of alloy forged steel components, and reduced braking performance, etc., and achieve the improvement of normal temperature strength and high temperature strength. The effect of hardenability and thermal strength properties, high temperature strength and plasticity improvement

Active Publication Date: 2013-03-06
CRRC QISHUYAN INSTITUTE CO LTD +1
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Problems solved by technology

[0003] (1) The composition matching of the existing alloy forged steel is not reasonable, and the composition is not easy to control during the smelting process, and the comprehensive mechanical properties are not very ideal
For example, the patent application with the publication number CN1385628A titled "A Material for High-speed Train Brake Disc" (the closest prior art) added chromium, molybdenum , vanadium and other alloy components, but chromium, molybdenum and other alloy components bring about a significant decrease in material plasticity and toughness while increasing the material strength; similarly, although vanadium can refine grains and improve strength, vanadium is easy to oxidize, As a result, its composition is not easy to control during the smelting process, and if it is added too much,

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  • Alloy forged steel and its heat treatment method and use
  • Alloy forged steel and its heat treatment method and use
  • Alloy forged steel and its heat treatment method and use

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[0055] 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.

[0056] Table 1 Chemical composition (%) of alloy forged steel of the present invention

[0057] C Si mn P S Ni Cr Mo 0.26% ～ 0.35% 0.15% ～ 0.39% 0.85% ～ 1.50% ≤0.020% ≤0.010% 0.70% ～ 2.00% 0.80% ～ 2.00% 0.35% ～ 1.00%

[0058] As shown in Table 1, the components and mass percentage ranges of the alloy forged steel of the present invention are as follows: carbon 0.26% to 0.35%; silicon 0.15% to 0.39%; manganese 0.85% to 1.50%; phosphorus less than or equal to 0.02%; Sulfur is less than or equal to 0.01%; chromium 0.80% ~ 2.00%; nickel 0.70% ~...

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Abstract

The invention provides an alloy forged steel and its heat treatment method and use. The alloy forged steel comprises: by mass, 0.26 to 0.35% of C, 0.15 to 0.39% of Si, 0.85 to 1.50% of Mn, less than or equal to 0.02% of P, less than or equal to 0.01% of S, 0.80 to 2.00% of Cr, 0.70 to 2.00% of Ni, 0.35 to 1.00% of Mo, and the balance Fe and other elements. Through reasonable proportioning of alloy elements such as Mn, Ni, Cr and Mo, and main chemical components such as C and Si in forged steel materials, through appropriate heat treatment processes, grains are refined; hardenability and heat intensity properties of the alloy forged steel are improved; normal temperature strength and high temperature strength of the alloy forged steel are greatly improved; and excellent comprehensive mechanical properties of the alloy forged steel are obtained.

Description

technical field [0001] The invention relates to an alloy forged steel and a heat treatment method thereof, and also relates to a high-speed train brake disc made of the alloy forged steel. Background technique [0002] The brake disc is an important part of the braking system of the EMU, especially the EMU with a speed of 250Km / h and higher. 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 forged steel material used in the brake disc. The deficiencies of alloy forged steel materials used for forged steel brake discs of high-speed trains in China mainly include: [0003] (1) The composition matching of the existing alloy forged steel is not reasonable, and the composition is not easy to control during the smelting process, and the comprehensive mechanical properties are not very ideal. For ex...

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Application Information

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IPC IPC(8): C22C38/44C22C38/50C22C38/48C22C38/46C21D1/28C21D1/25F16D65/02
Inventor 钱坤才金文伟郭晓晖阙红波严运涛郭立宾张勋林郑剑云
Owner CRRC QISHUYAN INSTITUTE CO LTD
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