铸造技术2012，Vol.33Issue(9)：1099-1101,3.
国产T23钢焊缝区显微组织分析
Analysis on Microstructure in Weld Zone of Domestic T23 Steel
龙开锋 1牛锐锋 1魏荣祥1
作者信息
- 1. 西安理工大学材料科学与工程学院,陕西西安710048
- 折叠
摘要
Abstract
In the condition of tungsten insert shielded metal arc welding technology, the microscopic structure in the welding zone of T23 heat-resisant steel was researched. The results show that the microstructure of the root pass is equiaxed ferrite and granular bainite as welded, when tempered at 740 ℃. and 760 ℃, the microstructures is constituent by needle ferrite and granular bainite, and disperse paricle precipitate at the matrix. The microstructure of the covering beads is granular bainite and ferrite as welded, a minimum of granular structure appears when tempered at 690-740 ℃, and decomposes or disappears when tempered at 760 ℃; the microstructure is tempered bainite when tempered at 740~760 ℃. The microstructures of the coarse grain heat affected zone (CGHAZ) is granular bainite and lath martensite as welded, when tempered at 690~740 ℃, the grain boundaries appear obvious, the grains grow up, and a large number of particles appear at the grain boundaries; the grain boundary has discreted when tempered at 760 ℃, the microstructure is tempered bainite and tempered sorbite, there are spot precipitates of different sizes at the matrix.关键词
T23钢/回火/显微组织/焊缝区Key words
T23 steel/ temper/ microscopic structure/ weld zone
分类
矿业与冶金引用本文复制引用
龙开锋,牛锐锋,魏荣祥..国产T23钢焊缝区显微组织分析[J].铸造技术,2012,33(9):1099-1101,3.
