Q345B钢板伸长率不合格的原因分析  

Reason Analysis of Unqualified Elongation for Q345B Steel Plate

作　　者：马海龙[1] 王莉[1] 裴宏江[1] 方圆[1] 

机构地区：[1]首钢京唐钢铁联合有限公司,河北唐山063200

出　　处：《热加工工艺》2015年第7期242-243,246,共3页Hot Working Technology

摘　　要：在Q345B钢板的实际生产中,出现批量厚板性能不合格的情况。利用晶相分析、SEM观察等手段对炼钢、热轧过程及不合格卷进行了分析,发现断后伸长率不合格与钢板金相组织不均和夹杂物有关。钢中存在的带状组织对断后伸长率影响较小,但改善带状组织有利于改善钢卷的塑性。In the actual production of Q345B steel plate,the unqualified properties of batch thick plate arise. The processes of steehnaking and hot rolling and unqualified plate were analyzed. It is found that the unqualified elongation is related to uneven microstructure and inclusions in the steel plate. The banding microstructure in the steel has a little effect to the elongation. But improving the banding mierostructurc is conducive to improving plastic of roll steel.

关 键 词：不合格伸长率 夹杂 金相组织 

分 类 号：TG113.25[金属学及工艺—物理冶金]