欧标H型钢冲击性能不稳定原因分析  

Cause Analysis for Unstable Impact Property of the H-beam Meeting European Standard

作　　者：刘勇[1] 谷凤波[1] 蒲红兵[1] 管丙雨[1] 李海军[1] 

机构地区：[1]莱芜钢铁集团有限公司,山东莱芜271104

出　　处：《山东冶金》2012年第3期42-43,共2页Shandong Metallurgy

摘　　要：针对莱钢中型线欧标H型钢冲击韧性不稳定的问题,取样进行了金相及扫描电镜检测,分析认为,由于终轧温度高、冷却速度快,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。通过提高钢水洁净度,优化生产工艺等,稳定了产品冲击性能。For unstable impact toughness of European Standard H-beam produced in Laiwu Steel medium section line, the H-beams were sampled for metallographic examination and scanning electron microscopic detection. Analysis considered that because of high final rolling temperature and fast cooling speed, the Widmanstatten structure influenced impact toughness appeared, in addition, the inclusions in steel is also the cause resulted in the unstable impact toughness. By improving the cleanliness of molten steel, optimizing the production process and so on, the impact Dror^ertv of the oroducts kept stable.

关 键 词：H型钢 冲击韧性 不稳定 魏氏组织 夹杂物 

分 类 号：TG115.2[金属学及工艺—物理冶金]