理化检验-物理分册2026，Vol.62Issue(3)：29-34,6.DOI:10.11973/lhjy-wl250105
Q370qD桥梁结构钢断后伸长率不合格原因
Causes of unqualified elongation after fracture of Q370qD bridge structural steel
宋晓亮 1付强 1余宏伟1
作者信息
- 1. 宝武集团鄂城钢铁有限公司,鄂州 436002
- 折叠
摘要
Abstract
Aiming at the problem of unqualified elongation of Q370qD bridge structural steel after fracture,the reasons for unqualified elongation after fracture were analyzed by means of macroscopic examination,chemical composition analysis,metallographic examination and scanning electron microscope analysis.The results show that the main reason for the unqualified elongation of Q370qD bridge structural steel after fracture was that the surface of the steel plate was hardened during rolling,and there were inclusions and banded structures in the center.Finally,specific improvement measures were put forward from the perspective of process control of continuous casting,rolling and other processes,which provided a scientific basis for the stable production of the steel.关键词
中厚板/断后伸长率/加工硬化/带状组织/夹杂物Key words
medium plate/elongation after fracture/work hardening/banded structure/inclusion分类
矿业与冶金引用本文复制引用
宋晓亮,付强,余宏伟..Q370qD桥梁结构钢断后伸长率不合格原因[J].理化检验-物理分册,2026,62(3):29-34,6.
