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railway vehicle wheels

A technology for railway vehicles and wheels, which is applied in the field of steel for railway vehicle wheel blanks and its wheels and manufacturing, steel for railway vehicle wheel blanks, and can solve the problems of unsatisfactory strength and toughness, low tensile strength and yield strength, etc. , to achieve high toughness and excellent yield strength

Active Publication Date: 2019-07-02
BEIJING TEYE IND & TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] Chinese patent CN102534396 A discloses a high-speed train wheel steel, which improves the fracture toughness of medium and high carbon steel by adding 0.015-0.110% Nb and special heat treatment process, but the tensile strength and yield strength are still low
Chinese patent CN 1800427A also provides bainite steel for railway wheels containing V, but the strength and toughness are still not ideal

Method used

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Embodiment

[0058] The steel containing the composition in Table 2 was smelted in an electric arc furnace, and the smelting process included vacuum degassing treatment and subsequent electroslag remelting treatment. Then cast into wheel billets. A wheel consisting of a rim and spokes is forged according to the specification requirements of a railway vehicle wheel. In Table 2 two examples and two comparative examples are given. The comparative example 1 is the steel of the embodiment in the specification titled "Bainite steel for railway vehicle wheels" disclosed in Chinese patent CN1800427A. The second comparative example is steel R7 for traditional train wheels. Each component is calculated by weight percentage. As in Example 1, the weight percentage of C is 0.15%, and so on.

[0059] The chemical composition of each embodiment and comparative example steel of table 2

[0060] C Si mn P S Cr Cu Mo Ni V Embodiment one 0.15 0.9 2.0 ≤0.010 ≤0.010 0.4 ...

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Abstract

The invention discloses steel for a wheel blank of a railway vehicle wheel. The steel for the wheel blank of the railway vehicle wheel comprises, by mass, 0.1%-0.25% of C, 0.7%-1.2% of Si, 1.5%-2.2% of Mn, 0.5%-1% of Cr, 0.3%-0.8% of Ni, 0.2%-0.4% of Mo and the balance Fe and inevitable impurities. The steel for the wheel blank of the railway vehicle wheel is high in strength and keeps high tenacity. The invention further provides a manufacturing method of the wheel blank and the railway vehicle wheel made of the wheel blank.

Description

technical field [0001] The invention relates to a steel for a wheel blank of a railway vehicle, the wheel and a manufacturing method thereof, in particular to a steel for a wheel blank of a railway vehicle using a specific chemical composition, which has both high strength and high toughness, and a method for manufacturing the blank And a railway vehicle wheel obtained by using the wheel blank. Background technique [0002] At present, as one of the core technologies for the development of high-speed wheel-rail railways, the focus of research on steel for train wheels is how to ensure the safety and service life of wheels under operating conditions. [0003] The research results show that during the operation of the train, the dynamic conditions of the train change significantly, and the service conditions of the wheels also change significantly. Wheels play the roles of bearing, power transmission and braking during train operation. With the increase of the running speed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18C22C33/04C22B9/18
CPCC22B9/18C22C33/04C22C38/02C22C38/04C22C38/08C22C38/12C22C38/18
Inventor 张绵胜张志强张志勇白秉哲
Owner BEIJING TEYE IND & TRADE