电焊机2018，Vol.48Issue(1)：57-62,6.DOI:10.7512/j.issn.1001-2303.2018.01.14
低合金钢自动回火焊接过程中热影响区组织转变
Microstructure transformation of heat affected zone during automatic temper welding of low alloy steel
叶义海 1罗绪珍 1王建 1付荣真 2张江涛 2王理 1宋怡漾 1朱勇辉 1潘晓冬1
作者信息
- 1. 中国核动力研究设计院反应堆燃料及材料重点实验室,四川成都610041
- 2. 中核核电运行管理有限公司,浙江海盐314300
- 折叠
摘要
Abstract
The surfacing is conducted on nickel-base alloy 690 layers on the low alloy steel (SA508-3) by using the temper bead technology to prepare the specimens.The microstructures of the heat-affected zones (HAZ) corresponding to the different layers of specimen are researched.The results show that the martensitic transformation of HAZ is found after the first layer surfacing by using welding technology in this paper.The martensite temper transformation occurs in the welding thermal process of follow-up surfacing layers,and the transformation effect accumulates as the layer increases,finally the bad quenching microstructure of HAZ is corrected completely.Because of insufficient temper caused by insufficient cumulative time of high-temperature temper in the area near by the toe of weld at the both ends of the specimen,the martensite produced in HAZ by the first layer surfacing and the martensite generated by the decomposition of residual austenite in HAZ are corrected incompletely,but this problem can be resolved by the additional welding with specific technology.关键词
低合金钢SA508-3/回火焊道/热影响区/微观组织Key words
low alloy steel SA508-3/temper bead/heat-affected zone/microstructure分类
矿业与冶金引用本文复制引用
叶义海,罗绪珍,王建,付荣真,张江涛,王理,宋怡漾,朱勇辉,潘晓冬..低合金钢自动回火焊接过程中热影响区组织转变[J].电焊机,2018,48(1):57-62,6.
