稀土La对含残余元素Sn的GCr15轴承钢夹杂物的影响  

The Influence of Rare Earth Element La on Inclusions in GCr15 Bearing Steel Containing Residual Element Sn

作　　者：周原正 蘧自立 王艳平 姜云轩 李永康 魏昀 胡绍岩 ZHOU Yuanzheng;QU Zili;WANG Yanping;JIANG Yunxian;LI Yongkang;WEI Yun;HU Shaoyan(School of Iron and Steel,Soochow University,Suzhou 215006,China)

机构地区：[1]苏州大学沙钢钢铁学院,江苏苏州215006

出　　处：《金属材料与冶金工程》2025年第2期3-11,共9页Metal Materials and Metallurgy Engineering

基　　金：苏州大学“大学生创新创业训练计划”资助(202310285051Z);国家自然科学基金(52104337);中国宝武低碳冶金创新基金(BWLCF202317);甘肃省自然科学基金在站博士后专项(24JRRB001)。

摘　　要：通过光学显微镜(OM)和扫描电镜(SEM)等表征手段与热力学计算,研究了残余元素Sn和稀土La对轴承钢夹杂物种类和数量的影响。结果表明:在未加入Sn/Sn-La时,轴承钢夹杂物主要为MnS、TiN和Al_(2)O_(3);加入0.5%Sn后夹杂物种类没有发生明显变化,数量小幅上升,MnS、TiN和Al_(2)O_(3)的尺寸均有减小;加入0.5%Sn-0.05%La后,形成各种复杂的稀土夹杂物,而原有MnS和Al_(2)O_(3)夹杂物均消失;在实验钢中,La-Sn夹杂物符合析出的热力学条件。This study investigated the effects of residual element Sn and rare earth La on the types and quantities of inclusions in GCr15 bearing steel using characterization methods such as optical microscopy(OM)and scanning electron microscopy(SEM),coupled with thermodynamic calculations.The results indicate that in the absence of Sn/Sn-La additions,the primary inclusions in the bearing steel are MnS,TiN,and Al_(2)_(3).Upon adding 0.5%Sn,no significant change was observed in the types of inclusions,although their quantity slightly increased.The equivalent diameters of MnS,TiN,and Al_(2)O_(3)decreased.After the addition of 0.5%Sn combined with 0.05%La,various complex rare earth inclusions were formed,and the original MnS and Al_(2)O_(3)inclusions vanished.In the experimental steel,the precipitation of La-Sn inclusions was thermodynamically favorable.

关 键 词：GCR15轴承钢 夹杂物 残余元素Sn 稀土元素LA 

分 类 号：TG142.1[一般工业技术—材料科学与工程]