工程科学学报2017，Vol.39Issue(5)：643-654,12.DOI:10.13374/j.issn2095-9389.2017.05.001
低合金钢焊接热影响区的微观组织和韧性研究进展
Research progress on microstructures and toughness of welding heat-affected zone in low-alloy steel
李秀程 1李学达 2王学林 1夏佃秀 3王学敏 1尚成嘉1
作者信息
- 1. 北京科技大学钢铁共性技术协同创新中心,北京100083
- 2. 中国石油大学机电工程学院,青岛266580
- 3. 济南大学机械工程学院,济南250022
- 折叠
摘要
Abstract
The welding performance of steel structures such as offshore platforms, ships, bridges, buildings, and oil and gas pipelines directly determines the service life and safety of the structure, the importance of which cannot be minimized. In welding-re-lated research, the toughness of the welding heat-affected zone is a key issue. This zone experiences temperatures as high as 1400℃, thereby causing the formation of coarse austenite grains. If the welding parameters are improperly controlled, microstructure refinement cannot be achieved by subsequent phase transformation, which results in decreased impact toughness. Multi-pass welding is even more complex, with the secondary heat input affecting the coarse-grain zone formed during the previous pass. This results in the formation of necklace-type M-A constituents, which also lead to deterioration in toughness. In this paper, the relevant research results were sum-marized with regarding the welding heat-affected zone and it was discuss that the composition of the parent material, the second phase, the welding process, and other factors effect the microstructures and properties of the heat-affected zone. This paper also offers ideas for improving the welding performance of large steel structures in low-temperature service circumstances.关键词
低合金钢/焊接/热影响区(HAZ)/显微组织/M-A/韧性Key words
low-alloy steel/welding/heat-affected zone ( HAZ)/microstructure/M-A/toughness分类
矿业与冶金引用本文复制引用
李秀程,李学达,王学林,夏佃秀,王学敏,尚成嘉..低合金钢焊接热影响区的微观组织和韧性研究进展[J].工程科学学报,2017,39(5):643-654,12.
