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Micro-alloyed steel wheel with high contact fatigue resistance and production method thereof

A technology of contact fatigue and micro-alloyed steel, applied in the field of wheel steel, can solve difficult problems such as wheel strength and fatigue resistance improvement

Active Publication Date: 2022-02-18
MAANSHAN MAGANG JINXI RAIL TRANSPORT EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing wheel heat treatment technology is usually pre-quenching heating, water quenching, tempering, but this conventional heat treatment process is difficult to improve the hardness and fatigue resistance of the wheel

Method used

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  • Micro-alloyed steel wheel with high contact fatigue resistance and production method thereof
  • Micro-alloyed steel wheel with high contact fatigue resistance and production method thereof
  • Micro-alloyed steel wheel with high contact fatigue resistance and production method thereof

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Embodiment 1

[0034] The surface microstructure of the wheel in embodiment 1 and comparative example is respectively as follows figure 1 , 2 As shown, the surface morphology of contact fatigue samples is as follows: image 3 , 4 shown.

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Abstract

The invention discloses a micro-alloyed steel wheel with high contact fatigue resistance and a production method thereof. The wheel comprises the following chemical components in percentage by weight: 0.38-0.45% of C, 0.15-0.25% of Ni, 0.50-1.2% of Mn, 0.80-1.20% of Cr, 0.15-0.40% of Si, less than or equal to 0.040% of P, less than or equal to 0.040% of S and the balance being Fe and inevitable residual elements, wherein Mn + Cr is more than or equal to 1.5% and less than or equal to 2.0%. The wheel is produced by adopting the processes of electric furnace steelmaking, LF furnace refining, RH vacuum treatment, round billet continuous casting, ingot cutting and rolling, wheel billet forging, heat treatment, wheel machining, tread induction quenching, detection and packaging, and the produced wheel has excellent comprehensive mechanical properties, good matching of strength, hardness and toughness, and good wear resistance and contact fatigue resistance.

Description

technical field [0001] The invention belongs to the technical field of wheel steel, and in particular relates to a high-contact fatigue-resistant microalloy steel wheel and a production method thereof. Background technique [0002] The wheel bears the entire weight of the rolling stock and is one of the key components of the rolling stock. Heavy-duty and light weight are the key development directions of high-speed trains. Wheels are the heaviest key moving parts of a single body. Improving fatigue performance is the eternal theme of wheel technology research and development. [0003] The existing wheel heat treatment technology is usually heating before quenching, water quenching, and tempering, but this conventional heat treatment process is difficult to improve the hardness and fatigue resistance of the wheel. Contents of the invention [0004] In order to solve the above technical problems, the present invention provides a high contact fatigue resistance microalloy st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/40C21D1/18C21D1/42C21D1/667
CPCC22C38/40C22C38/04C22C38/02C21D1/18C21D1/42C21D1/667Y02P10/20Y02P10/25
Inventor 国新春陈刚邓荣杰陈威宁珅华磊杨晓东刘海波
Owner MAANSHAN MAGANG JINXI RAIL TRANSPORT EQUIP