Effect of manganese sulfide on the precipitation behavior of tin in steel  

作　　者：Gui-lin Sun Bo Song Ling-zhi Yang Su-fen Tao Yong Yang 

机构地区：[1]State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing [2]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing [3]Department of Metallurgical Technology

出　　处：《International Journal of Minerals,Metallurgy and Materials》2014年第7期654-659,共6页矿物冶金与材料学报（英文版）

基　　金：financial support from the National Natural Science Foundation of China(Nos. 51174019 and 51274269);the Fundamental Research Funds for the Central Universities(FRF-SD-12-010A and FRF-SD-12-002B)

摘　　要：Tramp elements such as tin are considered harmful to steel because of hot brittleness they induce at high temperatures. Because tramp elements retained in steel scrap will be enriched in new steel due to the difficultly of their removal, studies on the precipitation behavior of tin are essential. In this study, the effects of different inclusions on the precipitation behavior of tin in steel were studied. The results show that the tin-rich phase precipitates at austenite grain boundaries in an Fe-5%Sn alloy without MnS precipitates, whereas Sn precipitates at the boundaries of MnS inclusions in steel that contains MnS precipitates. MnS is more effective than silicon dioxide or aluminum oxide as a nucleation site for the precipitation of the tin phase, which is consistent with the disregistry between the lattice parameters of the tin phase and those of the inclusions.Tramp elements such as tin are considered harmful to steel because of hot brittleness they induce at high temperatures. Because tramp elements retained in steel scrap will be enriched in new steel due to the difficultly of their removal, studies on the precipitation behavior of tin are essential. In this study, the effects of different inclusions on the precipitation behavior of tin in steel were studied. The results show that the tin-rich phase precipitates at austenite grain boundaries in an Fe-5%Sn alloy without MnS precipitates, whereas Sn precipitates at the boundaries of MnS inclusions in steel that contains MnS precipitates. MnS is more effective than silicon dioxide or aluminum oxide as a nucleation site for the precipitation of the tin phase, which is consistent with the disregistry between the lattice parameters of the tin phase and those of the inclusions.

关 键 词：STEELMAKING manganese sulfide TIN PRECIPITATION heterogeneous nucleation 

分 类 号：TG142.1[一般工业技术—材料科学与工程]