原子能科学技术2016，Vol.50Issue(6)：1101-1106,6.DOI:10.7538/yzk.2016.50.06.1101
P11耐热钢窄间隙焊接接头组织分布特征与性能分析
Microstructure Distribution Characteristic and Property Analysisof Narrow Gap Welded Joint of P11 Heat Resistant Steel
杨秦政 1王海东 2李晓延 1王挺 2张伟栋2
作者信息
- 1. 北京工业大学 材料科学与工程学院,北京 100124
- 2. 核工业工程研究设计有限公司,北京 101601
- 折叠
摘要
Abstract
The P11 heat resistant steel was welded by the narrow gap automatic TIG method,and the bead was filled using multi-layer single pass technology.Then the metallographic structures were observed and mechanical properties were tested,and the relationship between microstructure distribution characteristic and micro-hardness was particular searched.The results show that the filling bead consists of ferrite and troostite,and the coarse and fine grained regions are appeared alternately.When compared with base metal,the microstructure is finer and micro-hardness is higher.The cosmetic bead is mainly composed of coarse lath martensite and granular bainite while reticular troostite emerged,and the micro-hardness is higher than that of filling bead.In heat affected zone (HAZ) of filling bead,ferrite and pearlite with a banding distribution are observed,which is similar with the filling bead.In the thickness direction,the ultimate tensile strengths of top and bottom are almost the same,which is corresponding with microstructure distribution characteristic.And the impact tests show that absorption energy can meet all the requirements.关键词
窄间隙焊接/组织分布/维氏硬度/力学性能Key words
narrow gap weld/microstructure distribution/Vickers hardness/mechanical property分类
矿业与冶金引用本文复制引用
杨秦政,王海东,李晓延,王挺,张伟栋..P11耐热钢窄间隙焊接接头组织分布特征与性能分析[J].原子能科学技术,2016,50(6):1101-1106,6.
