欧标H型钢冲击性能不稳定原因分析  

Analysis of Causes for Instability of Impact Property of H-Beam Meeting EN Standards

作　　者：谷凤波[1] 韩文习[1] 朱京军[1] 

机构地区：[1]莱芜钢铁集团有限公司技术中心

出　　处：《莱钢科技》2011年第1期50-52,共3页Laigang Science & Technology

摘　　要：针对莱钢中型线欧标H型钢冲击韧性不稳定的问题，通过取样从金相及扫描电镜分析得出，造成冲击性能不稳定的主要原因是由于终轧温度过高、冷却速度过快，形成了对冲击性能影响较大的魏氏组织，另外钢中的夹杂物也是造成冲击性能不稳定的原因。通过生产工艺的优化后，产品冲击性能得到了提高，并且相对较为稳定。Aiming at the instability of impact property of H-Beam meeting EN standards in the medium- sized production line of Laigang, through analyzing by OM and SEM, the key reasons for instability of impact property were that the finishing rolling temperature was high and the cooling velocity was fast to form widmanstaten mierostructure which had a big influence to the impact property, furthermore the inclusion in steel also was the reason for instability of impact property. The impact property of products was improved and kept steady through optimization of production process.

关 键 词：魏氏组织 冲击韧性 夹杂物 

分 类 号：TG335.42[金属学及工艺—金属压力加工]