Low cost lean production bainitic steel wheel for rail transit, and manufacturing method therefor

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United States of America Patent

PATENT NO 11434553
APP PUB NO 20190144979A1
SERIAL NO

16314394

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Abstract

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The present invention discloses a low cost lean production bainitic steel wheel for rail transit and a manufacturing method therefor. The steel wheel contains elements with the following weight percentages: carbon C: 0.15-0.45%, silicon Si: 1.00-2.50%, manganese Mn: 1.20-3.00%, rare earth RE: 0.001-0.040%, phosphorus P≤0.020%, and sulphur S≤0.020%, where the remaining is iron and unavoidable residual elements, and 3.00%≤Si+Mn≤5.00%. Compared with the prior art, through alloying design and a preparation process, especially a heat treatment process and technology, a rim of the wheel obtains a carbide-free bainite structure, and a web and a wheel hub obtain granular bainite, a supersaturated ferritic structure, and a small amount of pearlite. The wheel has high comprehensive mechanical properties and service performance. In addition, the heat treatment process and technology are fully used without particularly adding alloying elements such as Mo, Ni, V, Cr, and B, to greatly reduce costs of steel and realize lean production.

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Patent Owner(s)

Patent OwnerAddress
MAANSHAN IRON & STEEL CO LTDMAANSHAN ANHUI 243003
MAGANG (GROUP) HOLDING CO LTDMAANSHAN ANHUI 243003

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Deng, Rongjie Maanshan, CN 1 3
Fang, Zheng Maanshan, CN 239 963
Sun, Manli Maanshan, CN 8 18
Zhang, Feng Maanshan, CN 1002 28040
Zhang, Mingru Maanshan, CN 2 3
Zhao, Hai Maanshan, CN 26 83

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