82B生产中异常组织的产生分析及改善研究  

Analysis and Improvement Research on Abnormal Organization in 82B Production

作　　者：秦帅 夏云峰 高建峰 杨宝林 Qin Shuai;Xia Yunfeng;Gao Jianfeng;Yang Baolin(Rolling Mill,Shanxi Jianbang Group Co.,Ltd.,Linfen Shanxi 043000,China)

机构地区：[1]山西建邦集团有限公司轧材厂,山西临汾043000

出　　处：《山西冶金》2024年第12期41-44,共4页Shanxi Metallurgy

摘　　要：山西建邦集团有限公司轧材厂首次采用AB线双线共同生产工艺,对该工艺条件下SWRH82B抗拉强度偏差大的问题进行了分析,并对主要成分影响因素进行线性回归;同时对成品中出现的网状渗碳体组织和芯部马氏体组织原因进行了分析。结果发现:抗拉强度主要受C和Cr成分影响最大;芯部马氏体岛的产生主要由Mn、Cr偏析导致;网状渗碳体的产生主要由头部不冷段长度和高温回复时间决定。在实际生产实践过程中,可对成分Mn、Cr按中下线控制来降低芯部马氏体的产生,同时通过调整头部不冷段长度或者裁剪头部也可减少高级别网碳的产生。This article analyzes the large deviation in tensile strength of SWRH82B under the process conditions of our factory through the process comparison of the first joint production of AB line and double line,and conducts linear regression on the influencing factors of the main components.At the same time,an analysis was conducted on the causes of the network like cementite structure and the martensitic structure in the core of the finished product.The results showed that the tensile strength was mainly affected by the C and Cr components.The formation of martensitic islands in the core is mainly caused by Mn/Cr segregation.The formation of network like carbides is mainly determined by the length of the non cold section at the head and the high-temperature recovery time.In actual production practice,the Mn/Cr composition can be controlled according to the mid to low line to reduce the production of martensite in the core,and the production of high-grade mesh carbon can also be reduced by adjusting the length of the non cold section or cutting the head.

关 键 词：82B钢 金相组织 网状渗碳体 芯部马氏体岛 

分 类 号：TG335.63[金属学及工艺—金属压力加工]