文献类型：期刊文献

英文题名：Inclusion Characteristics in 95CrMo Steels with Different Calcium and Sulfur Contents

作者：Li, Xiang Long, Xiao Wang, Linzhu Tong, Shouhao Wang, Xiutao Zhang, Yin Li, Yutang

第一作者：李祥

通信作者：Long, X[1];Wang, LZ[2]

机构：[1]Guizhou Inst Technol, Coll Mat & Met Engn, Guiyang 550003, Peoples R China;[2]Guizhou Univ, Sch Mat & Met, Guiyang 550025, Peoples R China

第一机构：贵州理工学院材料与冶金工程学院

通信机构：corresponding author), Guizhou Inst Technol, Coll Mat & Met Engn, Guiyang 550003, Peoples R China;corresponding author), Guizhou Univ, Sch Mat & Met, Guiyang 550025, Peoples R China.|贵州理工学院材料与冶金工程学院;贵州理工学院;

年份：2020

卷号：13

期号：3

外文期刊名：MATERIALS

收录：;EI(收录号：20200808207767);Scopus(收录号：2-s2.0-85079682768);WOS:【SCI-EXPANDED(收录号:WOS:000515503100126)】；

基金：This project was supported by the National Science Foundation of China with grant No. 51704085 and 51804086. Furthermore, this project was supported by the National Natural Science Foundation of Guizhou Province with grant No. [2018]1060 and was supported by the research program for talented scholars of the Guizhou Institute of Technology with grant No. XJGC20190962. The Program Foundation for Talents of Education department of Guizhou Provinc with grant No. Qian Jiao He [2018]105, Program Foundation for Talents of Guizhou University with the grant No. 2017(05), the technology planning project of Guizhou Province with grant No. Qian Ke He [2017]5788, and [2018]5781 are gratefully acknowledged.

语种：英文

外文关键词：inclusion; size; sulfide; equilibrated transformation

摘要：In order to study the effect of Ca and sulfur contents on the characteristics of inclusions, industrial experiments using 95CrMo steel were conducted. SEM-EDS detections and stereological analysis were used to probe the characteristics of inclusions, including their compositions, morphologies, size, number density, and distribution. The results indicate that there were mainly three types of inclusions in 95CrMo steel billets with 6-18 ppm Ca and 30-100 ppm S: inclusions with single-phased morphology mainly composed of oxides; isolated MnS/CaS-only inclusions; inclusions with multi-phased morphology. The three-dimensional inclusion size distribution suggests that there were more Type-1 inclusions with a small size in low S containing steels. The average diameter of all types of inclusions increased with increasing Ca or S content in 95CrMo steel, indicating that the formation of MnS and CaS coarsened their size. The density distribution of inclusions indicates that the more inclusions there are, the more easily they aggregate and collide. Moreover, it is presumably concluded that the formation of sulfide in the outer layer of oxide inclusions weaken the attraction between oxide inclusions. The equilibrated transformation and formation of inclusions during the cooling process of 95CrMo steel was discussed based on thermodynamic calculation. The equilibrated transformation trajectory of inclusions in 95CrMo steel during the cooling process was Ca2SiO4 + MgO -> Ca3MgSi2O8 -> Spinel + CaS, which was corresponding to the detected results. The precipitation regular of sulfide was obtained. The formation mechanism for three types of inclusions was discussed.