热轧45钢加工开裂缺陷原因分析与改进  

Analysis on Causes Leading to Cracking Defects of Hot Rolled 45 Steel during Machining and Improvement

作　　者：任俊威[1] 张吉富[1] 王刚[1] 杨玉 REN Junwei;ZHANG Jifu;WANG Gang;YANG Yu(Bayuquan Branch of Angang Steel Co.,Ltd.,Yingkou 115007,Liaoning,China;Ansteel Iron&Steel Research Institutes,Anshan 114009,Liaoning,China)

机构地区：[1]鞍钢股份有限公司鲅鱼圈钢铁分公司,辽宁营口115007 [2]鞍钢集团钢铁研究院,辽宁鞍山114009

出　　处：《鞍钢技术》2023年第5期84-86,90,共4页Angang Technology

摘　　要：结合用户在加工热轧45钢过程中发生的开裂缺陷问题,采用GX51光学显微镜进行了金相检测,统计分析了产生开裂缺陷的原因主要为夹杂物、带状组织、残余应力和脱碳,并提出带钢生产工艺过程的改进方法,经现场生产评价及用户反馈,开裂比例由原来的0.5%下降到0.12%以下。Combined with the cracking defects occurred during the machining of hot-rolled 45 steels by users,metallographic examination for these defects was conducted by using GX51 optical microscope.Based on the statistical analysis,it was concluded that the main causes leading to cracking defects consisted of inclusions,banded microstructures,residual stress,and decarburization.And thus some improvement methods for producing strip steels were proposed.Depending on on-site production evaluation and information feedback from users,the cracking ratio decreased from 0.5%to below 0.12%.

关 键 词：45钢 开裂 热轧 

分 类 号：TG33[金属学及工艺—金属压力加工]