EA1N车轴钢正火组织异常的原因分析  

Cause analysis of abnormal microstructure in EA1N axle steel after normalizing

作　　者：邬中华[1] 王松伟 Wu Zhonghua;Wang Songwei(Technology Center of Shanxi Taiyuan Stainless Steel Co.,Ltd.,Taiyuan Shanxi 030003,China)

机构地区：[1]山西太钢不锈钢股份有限公司技术中心,山西太原030003

出　　处：《金属热处理》2025年第3期307-311,共5页Heat Treatment of Metals

基　　金：工信部项目(2023ZY02005-02)。

摘　　要：讨论了EA1N车轴钢在常规正火处理后组织中存在的异常粗大珠光体团形貌及性能,分析了异常粗大珠光体团形貌的成因和正火温度及后续冷却速度对EA1N车轴钢显微组织的影响。结果表明,粗大珠光体团的形成与EA1N车轴中碳成分偏析、正火处理温度和后续冷却速度有关。正火温度越高,异常珠光体团就越粗大。正火处理后的冷却速度越小,越容易形成珠光体团,而且珠光体团的粗化程度越严重。The abnormal coarse pearlitic colonies observed in the microstructure of EA1N axle steel after conventional normalizing treatment was discussed and the causes of these abnormal coarse pearlitic colonies,as well as the effects of normalizing temperature and subsequent cooling rate on the microstructure of the EA1N axle steel were analyzed.The results show that the formation of coarse pearlitic colonies is related to carbon segregation in the EA1N axle steel,normalizing temperature,and subsequent cooling rate.The higher the normalizing temperature,the coarser the abnormal pearlitic colonies become.The slower the cooling rate after normalizing treatment,the easier it is to form pearlitic colonies,and the more severe the coarsening of the colonies.

关 键 词：EA1N车轴钢 异常组织 正火 珠光体团 

分 类 号：TG111.5[金属学及工艺—物理冶金]