1215MS易切削钢中硫元素及硫化物夹杂物的变化规律探讨  

Discussion on the Changes of Sulfur Elements and Sulfide Inclusions in Free Cutting Steel 1215MS

作　　者：林晏民 牟丹 李富强 LIN Yan-min;MOU Dan;LI Fu-qiang(Guangdong ZNIS Co.,Ltd.of Baowu Group Zhongnan Iron&Steel,Shaoguan,Guangdong,512123,P.R.China)

机构地区：[1]宝武集团中南钢铁中南股份,广东韶关512123

出　　处：《南方金属》2025年第2期1-5,共5页Southern Metals

摘　　要：用高温共聚焦显微镜和电子显微镜对1215MS含硫钢进行研究,研究表明,硫在加热时活动规律:随着加热温度的升高,硫总体呈现出先逐渐长大,后固溶到钢基体中。1215MS含硫钢的硫化物夹杂物加热时变化规律:夹杂物主要以三种形式存在,硫化锰、硫化锰与氧化物复合、硫化锰与氧化物和硫化亚铁复合;夹杂物随着温度升高,都有明显的长大过程,随着升温夹杂物会分解,析出硫,随着升温及保温,析出的硫又会溶入到基体中去,升温到1240℃硫已经全部溶入到基体中。通过正交试验得到钢中硫化物的转变图。依据硫及硫化物加热时变化规律,调整加热工艺,提高了轧钢生产效率。The high-temperature confocal microscope and electron microscope were used to study sulfur-containing steel 1215MS,and the mechanism of sulfur activity during reheating was clarified.As the reheating temperature increases,the sulfur overall shows a gradual growth,followed by solid solution into the steel matrix.We have clarified the mechanism of sulfide inclusions in sulfur-containing steel 1215MS during reheating,that is the inclusions mainly exist in three ways:manganese sulfide,manganese sulfide combined with oxide,manganese sulfide combined with oxide and ferrous sulfide;As the temperature increases,inclusions undergo a significant growth process.As the temperature increases,inclusions will decompose and precipitate sulfur.As the temperature increases and remains warm,the precipitated sulfur will dissolve into the matrix again.When the temperature rises to 1240℃,all sulfur has already dissolved into the matrix.The transformation diagram of sulfides in steel was obtained through orthogonal experiments.The reheating process has been adjusted to improve the efficiency of steel rolling production in response to the heating patterns of sulfur and sulfide.

关 键 词：含硫钢 硫化物 转变图 

分 类 号：TK263.5[动力工程及工程热物理—动力机械及工程] TG142[一般工业技术—材料科学与工程]