O、S、Ce含量对U71MnG钢中Ce_(2)O_(3)和Ce_(2)O_(2)S夹杂物的影响  

Effect of O,S and Ce Contents on Ce_(2)O_(3) and Ce_(2)O_(2)S Inclusions in U71MnG Steel

作　　者：王敏 刘香军[1] 杨昌桥[1] 杨吉春[1] WANG Min;LIU Xiang-jun;YANG Chang-qiao;YANG Ji-chun(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China)

机构地区：[1]内蒙古科技大学材料与冶金学院,内蒙古包头014010

出　　处：《稀有金属与硬质合金》2024年第2期45-49,共5页Rare Metals and Cemented Carbides

基　　金：国家自然科学基金项目(52204364);内蒙古自治区直属高校基本科研业务费项目(2023QNJS011)。

摘　　要：我国稀土钢未实现大规模的生产,其主要原因是对稀土与钢中O、S等杂质元素的相互作用规律认识不足。考虑到Ce、O、S含量对钢中稀土夹杂物的影响缺少定量分析,使用FactSage 7.1软件计算U71MnG钢中不同含量O、S、Ce之间的相互作用关系及其对Ce_(2)O_(2)S、Ce_(2)O_(3)夹杂物析出量的影响。热力学计算结果表明,在U71MnG钢的成分体系下,随着Ce含量的增多,Ce_(2)O_(3)的析出量呈先增多后减少的趋势,m_(O)/m_(Ce)约为1/7.4时,Ce_(2)O_(3)的析出量最大;Ce_(2)O_(2)S的生成需要O、S、Ce共同作用,m_(O+S)/m_(Ce)约为1/3.7时,Ce_(2)O_(2)S析出量最大。试验钢夹杂物的SEM图像以及夹杂物颗粒数量统计结果显示,Ce含量为0.024%的试验钢中Ce_(2)O_(3)、Ce_(2)O_(2)S的个数大于Ce含量为0.016%的试验钢,钢中夹杂物析出规律与热力学计算结果一致。In our country,the large-scale production of rare earth steel has not been achieved mainly due to insufficient understanding of the interaction between rare earth and impurity elements such as O and S in steel.Considering the lack of quantitative analysis of the effect of Ce,O,and S contents on rare earth inclusions in steel,FactSage 7.1 software was used to investigate the interaction between different contents of O,S,and Ce in U71MnG steel,as well as their effects on the precipitation of Ce_(2)O_(2)S and Ce_(2)O_(3) inclusions.Thermodynamic calculation results show that in the composition system of U71MnG steel,the precipitation of Ce_(2)O_(3) increases at first and then decreases with the increasing Ce content,and reaches the peak at the ratio of m_(O)/m_(Ce)of approximately 1/7.4.The formation of Ce_(2)O_(2)S requires the joint action of O,S,and Ce,and the precipitation of Ce_(2)O_(2)S reaches the peak at the ratio of m_(O+S)/m_(Ce)of approximately 1/3.7.SEM images of steel inclusions and statistical results of the number of inclusion particles show that the number of Ce_(2)O_(3) and Ce_(2)O_(2)S inclusions in the test steel with a Ce content of 0.024%is higher than that in the test steel with a Ce content of 0.016%.And the laws of inclusion precipitation in steel are consistent with thermodynamically calculated results.

关 键 词：稀土夹杂物 热力学 钢 Ce_(2)O_(2)S Ce_(2)O_(3) 

分 类 号：TG142.1[一般工业技术—材料科学与工程]