Q345qD宽厚板冲击性能不合格原因分析
Analysis for unqualified impact properties of Q345qD wide heavy plate
杨治争 1洪霞 1易勋 2郭斌 3董中波 1YANG Zhizheng 4HONG Xia 4YI Xun 5GUO Bin 6DONG Zhongbo4
作者信息
- 1. 武钢研究院,湖北 武汉 430080
- 2. 武钢集团鄂钢公司 宽厚板事业部,湖北 鄂州 436002
- 3. 武钢研究院,湖北 武汉 430080;武钢集团鄂钢公司 宽厚板事业部,湖北 鄂州 436002
- 4. Research and Development Center of WISCO,Wuhan 430080,China
- 5. Wide Heavy Plate Plant of Esteel of WISCO,Ezhou 436002,China
- 6. Research and Development Center of WISCO,Wuhan 430080,China;Wide Heavy Plate Plant of Esteel of WISCO,Ezhou 436002,China
- 折叠
摘要
通过观察Q345qD钢板冲击性能不合格试样内部组织形貌及断口特征,并回溯该钢种的冶金过程参数,得出了造成该钢种冲击韧性不合格的直接原因是钢板内部严重的带状组织,基本原因是冶金过程质量控制不良,同时轧制过程的稳定性也存在一定影响.通过相应优化措施,使该钢种的-20 ℃冲击韧性合格率从90 ％以下提高到100 ％,且冲击吸收功均值提高了40 J以上.
Abstract
Internal structure morphology and fracture characteristic of Q345qD wide heavy plate samples with unqualified impact properties were analyzed,and metallurgical process parameters of the steel were backtracked,it was concluded that unqualified impact toughness was directly caused by serious banded structure in the steel plate,and basically caused by the poor quality control in metallurgical process,it was also affected by rolling stability.By the relevant optimized measures,-20 ℃ impact toughness qualification rate was improved from less than 90 ％ to 100 ％,and the average impact absorbing energy was increased by more than 40 J.
关键词
宽厚板/冲击吸收功/中心偏析/带状组织Key words
wide heavy plate/impact absorbing energy/central segregation/banded structure引用本文复制引用
出版年
2017
NETL
NSTL
维普
万方数据