Effect of Ce on inclusion evolution for 440C stainless bearing steel
MA Shuai1, LI Yang1, JIANG Zhou-hua1, SUN Meng1, CHEN Chang-yong2, LIU Hang3
1. School of Metallurgy, Northeastern University, Shenyang 110819, Liaoning, China; 2. School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China; 3. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China
Abstract：In order to explore the modification effect of rare earth Ce on the inclusions in 440C stainless bearing steel, a laboratory MoSi2 resistance furnace was used to treat 440C stainless bearing steel with rare earth Ce, and the effects of Ce addition on deoxidation and inclusion evolution of 440C stainless bearing steel were systematically analyzed by OM and SEM. The results show that with the increase of Ce addition, the yield gradually increases. The mass fraction of TO in steel is reduced from 0.002 5% to 0.001 2% by addition of Ce. The inclusions in steel without Ce element are mainly Al2O3, MnS and magnesium aluminum spinel, while the inclusions are modified to Ce-Al-O-based inclusions by adding 0.011 5% Ce. When the amount of Ce added reaches 0.036 4%, the inclusions are completely modified to Ce-O-S inclusions. The size and area ratio of inclusions can be reduced by a moderate amount of Ce, but the size of inclusions will be increased due to excessive addition of Ce. Under the test conditions, when the mass fraction of Ce is 0.011 5%, the fine dispersion effect of inclusions in steel is the most obvious. This study can provide a reference for the application of Ce in high-carbon chromium stainless bearing steel.
马帅, 李阳, 姜周华, 孙萌, 陈常勇, 刘航. Ce对440C不锈轴承钢夹杂物演变的影响[J]. 中国冶金, 2022, 32(6): 71-78.
MA Shuai, LI Yang, JIANG Zhou-hua, SUN Meng, CHEN Chang-yong, LIU Hang. Effect of Ce on inclusion evolution for 440C stainless bearing steel[J]. China Metallurgy, 2022, 32(6): 71-78.
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2022, Vol. 32 
