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| Analysis on modification behavior of rare earth to inclusions in highly clean bearing steel |
| YANG Chao-yun1,2, ZHUANG Quan3, LIU Hang1, LUAN Yi-kun1,2, CHEN Xing-qiu1,2, LI Dian-zhong1,2 |
1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China;
2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, Liaoning, China;
3. Wafangdian Bearing Group Co. , Ltd. , Dalian 116300, Liaoning, China |
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Abstract To clarify the modification behavior of rare earth to inclusions in highly clean bearing steel for the purpose of providing references for rare earth (RE) treated bearing steel, highly pure RE alloy was added to highly clean bearing steel, and inclusions and their precipitation behaviors in bearing steel with different RE contents were characterized and analyzed with scanning electron microscopy and energy disperse spectroscopy. The results show that RE addition can modify Al2O3 and MnS inclusions into RE inclusions in highly clean bearing steel. The RE-S-As-P inclusion can act as the nucleus of RE-O-S-As-P-C inclusion to promote its precipitation. With the increase of RE content, the reaction sequence of RE elements with inclusion forming elements should be O, S, As, P and C successively, and the evolution sequence of RE inclusion type is expected to be mainly RE2O3、RE2O2S、RES、RE-O-S-As、RE-S-As、RE-S-As-P、RE-O-S-As-P-C、RE-O-As-P-C、RE-O-P-C和RE-O-C.
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Received: 08 June 2020
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2020, Vol. 30 
