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Bainite steel for railroad carriage wheel

A technology for bainitic steel and railway vehicles, which is applied in the direction of furnace types, furnaces, heat treatment furnaces, etc. It can solve problems such as fatigue, peeling, poor thermal crack resistance, and low yield strength, so as to reduce wheel rim cracks and service life Long-lasting and safe to use

Active Publication Date: 2008-06-18
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The wheel steels currently used for railway vehicles are mainly ordinary carbon structural steels, low-alloy steels and micro-alloyed steels. Therefore, the yield strength is not high, the toughness reserve is not much, the sensitivity to white spots is large, and the thermal cracking resistance is poor. The wheels are prone to fatigue, peeling and other failures under high-speed, heavy-load, and complex operating conditions. Destruction phenomenon; See "Railway Wheel, Tire Failure Analysis and Damage Atlas" P18 page Table 2-1 Commonly used wheels, tire chemical composition and mechanical properties (Zhang Bin et al., China Railway Press, 2002, Beijing ) of "TB / T2708-1996 Railway Express Passenger Car Rolled Steel Integral Wheel Technical Conditions"

Method used

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  • Bainite steel for railroad carriage wheel
  • Bainite steel for railroad carriage wheel
  • Bainite steel for railroad carriage wheel

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Embodiment

[0064] Through the comparative analysis of the above parameter data, the design schemes A, B, C and D all meet the design requirements. However, based on the relationship between the structure and properties of carbide-free bainitic steel, the complexity of the wheel production process, and the minimization of precious elements, after comprehensive consideration, the chemical composition and content of Scheme B have been adjusted appropriately , as an embodiment of the present invention, the chemical composition is shown in Table 5.

[0065] Table 5 Chemical composition / wt% of carbide-free bainitic steel

[0066]

[0067] According to the chemical composition in Table 5, the finished wheels were smelted, rolled, and heat treated. After inspection and analysis: the microstructure within the range of 50-70mm from the wheel tread is mainly carbide-free bainite structure, containing only a small amount of granular bainite body; the mechanical properties are shown in Table 4, a...

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Abstract

The invention provides a train wheel used bainite steel which is formed by C: 0.08-0.45%, Si: 0.60-2.10%, Mn: 0.60-2.10%, Mo: 0.08-0.60%, Ni: 0.00-2.10%, Cr: 0.00-1.20%, V: 0.00-0.20%, Cu: 0.00-1.00% and other iron and impurity elements.

Description

technical field [0001] The invention belongs to steel for railway vehicle wheels, in particular to a bainite steel used for manufacturing railway vehicle wheels. Background technique [0002] The wheel steels currently used for railway vehicles are mainly ordinary carbon structural steels, low-alloy steels and micro-alloyed steels. Therefore, the yield strength is not high, the toughness reserve is not much, the sensitivity to white spots is large, and the thermal cracking resistance is poor. The wheels are prone to fatigue, peeling and other failures under high-speed, heavy-load, and complex operating conditions. Destruction phenomenon; See "Railway Wheel, Tire Failure Analysis and Damage Atlas" P18 page Table 2-1 Commonly used wheels, tire chemical composition and mechanical properties (Zhang Bin et al., China Railway Press, 2002, Beijing ) among the "TB / T2708-1996 Railway Express Passenger Car Rolled Steel Integral Wheel Technical Conditions". Contents of the invention...

Claims

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Application Information

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IPC IPC(8): C22C38/00C22C38/02C22C38/04C22C38/08C22C38/18C22C38/20C22C38/24C22C1/02C21D9/00C21D7/13
Inventor 张明如张斌张建平陈联满江波安涛崔银会
Owner MAANSHAN IRON & STEEL CO LTD
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