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| Influence of pulse magneto-oscillation on solidification structure and carbides in bearing steel billet |
| WANG Hai-yang1，TENG Li-hong 1，ZHAO Yang1，REN Zhen-hai1，WAN Wen-hua1，ZHANG Ling-ling2，XU Zhi-shuai2 |
（1. Technical Center of Zenith Steel Group Company Limited， Changzhou 213011， Jiangsu， China
2. Center for Advanced Solidification Technology， Shanghai University， Shanghai 200444， China） |
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Abstract Pulse magneto oscillation （PMO） homogenization technique has been applied to improve the quality of bearing steel billet in Zenith Steel Group Company Limited. The solidified structure and carbides of produced bearing steel billet treated by PMO were investigated. The measured results showed that the area rate of equiaxed grain was significantly increased by a rate of 28.8%. In addition， the central shrinkage cavity and porosity were remarkably eliminated. It was found that the size and distribution of banded carbides and hydro carbides were obviously relieved. The size of carbides was reduced by a rate of 81.9% and 86.3%， respectively. The results suggested that the fatigue life of bearing steel treated by PMO could be extended.
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Received: 11 October 2018
Published: 29 January 2019
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2018, Vol. 37 
