热处理工艺对含硫易切削不锈钢中硫化锰夹杂物的影响  

Effect of heat treatment process on manganese sulfide inclusions in resulfurized free-cutting stainless steel

作　　者：王英虎 Wang Yinghu(Pangang Group Research Institute Co.,Ltd.,Panzhihua Sichuan 617000,China;State Key Laboratory of Marine Equipment Made of Metal Material and Application,Anshan Liaoning 114009,China)

机构地区：[1]攀钢集团研究院有限公司,四川攀枝花617000 [2]海洋装备用金属材料及其应用国家重点实验室,辽宁鞍山114009

出　　处：《金属热处理》2020年第10期64-69,共6页Heat Treatment of Metals

摘　　要：利用光学显微镜和扫描电镜-能谱仪研究了热处理工艺对含硫易切削不锈钢中硫化锰形貌、长宽比、尺寸及数量的影响。结果表明:试验钢中硫化锰主要沿晶界呈链状或网状聚集分布;在900~1100℃范围内,随着温度升高,硫化锰发生熔断碎裂;在1200℃热处理后,硫化锰熟化长大,球形及纺锤形硫化锰增多,分布由聚集状逐渐向弥散状转变。在1100℃热处理1~3 h,随着时间增加,硫化锰发生熔断碎裂;热处理保温4 h时,硫化锰熟化长大,球形及纺锤形增多,硫化锰由聚集状逐渐向弥散状转变,分布趋于均匀。合适的热处理工艺可以改善含硫易切削不锈钢中硫化锰的形貌、长宽比、尺寸及数量。Effect of heat treatment process on the morphology,length-width ratio,size and number of manganese sulfide in resulfurized free-cutting stainless steel was studied by means of OM and SEM-EDS.The results demonstrate that the manganese sulfide in the tested steel is mainly distributed in chain or network along the grain boundary.At the temperatures ranging from 900℃to 1100℃,with the increase of temperature,the manganese sulfide is fused and broken.After 1200℃heat treatment,the manganese sulfide matures and grows up,the globular and spindle-shaped manganese sulfide increases and the distribution changes from aggregation to dispersion.During the heat treatment at 1100℃for 1-3 h,with the increase of time,the manganese sulfide is fused and breaks.After heat treatment for 4 h,the manganese sulfide matures and grows up and the globular and spindle-shaped manganese sulfide increases.The manganese sulfide gradually changs from aggregation to dispersion and the distribution tends to be uniform.The appropriate heat treatment process can improve the morphology,length-width ratio,size and number of manganese sulfide in resulfurized free-cutting stainless steel.

关 键 词：热处理 含硫易切削不锈钢 THERMO-CALC软件 硫化锰 长宽比 

分 类 号：TG156.1[金属学及工艺—热处理]