热处理对25SiMn钢晶粒尺寸和珠光体含量影响分析  

Analysis on Effect of Heat Treatment on Grain Size and Pearlite Content of 25SiMn Steel

作　　者：刘玉庆 姚东峰 董文林 党强 苑峻铭 Liu Yuqing;Yao Dongfeng;Dong Wenlin;Dang Qiang;Fan Junming

机构地区：[1]山东省特种设备检验研究院集团有限公司,山东济南250000

出　　处：《大型铸锻件》2023年第1期30-35,共6页Heavy Casting and Forging

摘　　要：针对热处理后25SiMn轴锻件法兰端表层存在粗大的珠光体团簇和魏氏组织,形成晶粒度低于0级的混晶现象,研究了正火温度和保温时间对25SiMn钢晶粒尺寸和珠光体含量的影响。试验发现:25SiMn钢在900℃以下正火时晶粒尺寸较为稳定,高于920℃会导致晶粒粗大、加剧混晶,影响综合性能。After heat treatment,there are coarse pearlite clusters and Widmanstatten structure on the surface of the flange end of 25SiMn shaft forgings,which forms a mixed crystal phenomenon with grain size lower than 0 grade.In this paper,the effects of normalizing temperature and holding time on grain size and pearlite content of 25SiMn steel have been studied.It has been found that the grain size of 25SiMn steel is relatively stable when normalized below 900°C.And coarse grains and aggravated mixed grains have been led when normalized higher than 920°C,which will affect the comprehensive performance.

关 键 词：正火温度 保温时间 正火晶粒尺寸 珠光体含量 

分 类 号：TG162.71[金属学及工艺—热处理]