加热温度对高硫车轮钢夹杂物化学冶金的影响  

Reheating temperatures on chemical metallurgy of inclusions in high sulphur wheel steels

作　　者：李丽[1] 薛东妹[1] 潘涛[1] 余音宏[1] 陈刚[1] 苏航[1] 杨才福[1] 

机构地区：[1]钢铁研究总院工程用钢研究所,北京100081

出　　处：《连铸》2017年第3期43-48,共6页Continuous Casting

摘　　要：研究了高温加热对高硫车轮钢中MnS+Al_2O_3复合夹杂物结构与形态的影响。通过采用扫描电子显微(SEM)技术对高硫车轮钢中夹杂物的类型及尺寸进行了分析统计。结果表明:加热温度为1 300℃时,MnS回溶对MnS+Al_2O_3复合相的包裹效果没有产生显著地破坏作用。而当加热温度升至1 350℃后,由于大量的硫化物回溶,使不少氧化物夹杂物直接暴露于钢基体,破坏高硫钢中MnS+Al_2O_3复合相的包裹效果。在含硫车轮钢的热加工过程中,应该尽量降低处理温度(低于1 300℃)来降低MnS回溶对全包裹Al_2O_3复合夹杂物的破坏作用。The effect of reheating temperature on the structure and morphology of MnS＋Al2O3 compound inclusions in wheel steel with high Sulphur content has been studied.Scanning electron microscopy（SEM） had been employed to investigate the microstructure and size of MnS＋Al2O3 compound inclusions.The results showed that：when reheated at 1 300 ℃,compound structure of MnS-surrounding-Al2O3 was not significantly destroyed due to slight re-dissolution of sulfide.However,when the reheating temperature was raised up to 1 350 ℃,many oxide inclusions are directly exposed to the steel matrix because of obvious sulfide re-dissolution.Therefore,the hot working temperature should not be beyond 1 300 ℃ in order to reduce the influence of Mn S re-dissolution on the surrounding effect of Mn Son Al2O3 in the sulfur containing wheel steels.

关 键 词：加热温度 复合夹杂物 MNS 回溶 

分 类 号：TG142.1[一般工业技术—材料科学与工程] TG161[金属学及工艺—金属材料]