稀土变质高洁净轴承钢中夹杂物的行为分析  

Analysis on modification behavior of rare earth to inclusions in highly clean bearing steel

作　　者：杨超云[1,2] 庄权 刘航[1] 栾义坤 陈星秋[1,2] 李殿中 YANG Chao-yun;ZHUANG Quan;LIU Hang;LUAN Yi-kun;CHEN Xing-qiu;LI Dian-zhong(Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,Liaoning,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,Liaoning,China;Wafangdian Bearing Group Co.,Ltd.,Dalian 116300,Liaoning,China)

机构地区：[1]中国科学院金属研究所,辽宁沈阳110016 [2]中国科学技术大学材料科学与工程学院,辽宁沈阳110016 [3]瓦房店轴承集团有限责任公司,辽宁大连116300

出　　处：《中国冶金》2020年第9期45-52,66,共9页China Metallurgy

基　　金：国家自然科学基金资助项目(U1708252)。

摘　　要：为了阐明稀土变质高洁净轴承钢中夹杂物的行为,进而优化轴承钢的稀土处理过程,通过向高洁净轴承钢中加入高纯稀土的方法,借助SEM和EDS等观察和分析手段,重点对不同稀土含量轴承钢中夹杂物类型和析出行为进行了表征和分析。结果表明,稀土能够变质高洁净轴承钢中的Al2O3和MnS而形成稀土夹杂物,RE-S-As-P夹杂物可以作为RE-O-S-As-P-C夹杂物的形核核心促进其析出。随稀土含量的增加,稀土元素与夹杂物的形成元素的结合序列依次为O、S、As、P和C,稀土夹杂物类型演化序列主要为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。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.

关 键 词：高洁净轴承钢 稀土金属 含量 夹杂物 演化行为 

分 类 号：TG142.1[一般工业技术—材料科学与工程]