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| Development and Quality Control of Bearing Steel for Heavy Equipment |
| LIU Ya-zheng,ZHOU Le-yu,ZHANG Chao-lei,ZHANG Dan,SUN Jing-hong |
| School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract As the construction and application of heavy equipment such as automobile, high speed railway, precision machine and wind power, high requirements including product quality, long fatigue life and reliability have been proposed for the bearing. The bearing steel is the key point to influence the bearing quality, in addition to the structure design and manufacturing precision. Requirement and property of bearing in field of high speed railway, wind power and tunnel boring machine (TBM) were analyzed. Development of bearing steel was introduced. Quality control principle of bearing steel was discussed to achieve the aim of clean, homogenized and refined microstructure. Clean steel is obtained by precise composition, low harmful element amount, carbide eliquation, segregation, solidification defects and inclusion control during melting and solidification. Homogenized and refined microstructure was obtained by controlled rolling and controlled cooling during rolling or forging process, to meeting workability of subsequent process.
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Received: 16 July 2013
Published: 19 August 2013
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2013, Vol. 48 
