Q345E钢板低温冲击不合的原因分析与改进  

Cause Analysis and Improvement of Low Temperature Impact Disqualification for Q345E Steel Plate

作　　者：向华[1] 秦军[1] 刘奉家[1] 

机构地区：[1]宝钢集团八钢公司制造管理部

出　　处：《宽厚板》2014年第4期43-46,共4页Wide and Heavy Plate

摘　　要：针对12~18 mm厚度Q345E低合金结构钢板低温冲击性能的影响因素进行分析和研究，结果表明，钢板中心偏析、带状组织是低温冲击性能不合格的主要原因。通过成分优化以及生产工艺改进，改善了Q345E钢板的低温冲击韧性，同时产品合格率也得到显著提高。Analysis and investigation are performed on influencing factors of low temperature impact properties for 12~18 mm thickness Q345E low alloy structural steel plate. The results show that central segregation,severe banded structure are the major causes of low temperature impact property disqualification. By means of composition and production process optimization,the low temperature impact toughness and product qualification rate are improved.

关 键 词：Q345E钢板 控制轧制 低温韧性 

分 类 号：TG115[金属学及工艺—物理冶金] TG142.33[金属学及工艺—金属学]