摘要
利用高压试验舱模拟高压环境,在环境压力为0.5 MPa的条件下进行了V型坡口对接低碳钢熔化极气体保护电弧焊焊接试验,利用湿度监测系统监测焊接过程中周围环境的湿度变化情况,并进行了焊缝的力学性能测试及其微观组织形貌分析.结果表明:随着环境相对湿度增加,焊接接头的冲击韧性下降;焊缝热影响区(HAZ)的金属微观组织变得粗大,而且出现了少量贝氏体组织,但仍能够满足美国焊接学会提出的水下焊接规程(AWS D3.6M-2010)的要求.
A high pressure tank was utilized to simulate hyperbaric environment and a V square butt welding of gas metal arc welding （C-MAW） test was conducted at 0.5 MPa. Besides, a humidity sensor was used to record the change of humidity in the process of welding. In addition, the mechanical property tests and metallurgical structure observations of the welds were fulfilled. The results show that with the increase of humidity, the impact toughness of weld decreases, the microstructure of heat affected zone （HAZ） becomes bulky, and a small amount of bainite structures appear; however, the requirements of the AWS D3.6Mstill can be satisfied.
作者
冯静
薛龙
黄军芬
刘宏
谭谊诚
FENG J ing XUE Long HUANG Junjeeng LIU Hong TAN Yincheng(Opto-Mechatronic Equipment Technology Beijing Area Major Laboratory, Beijing Institute of Petro-Chemical Technology, Beijing 102617, China School of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029, China)
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2016年第10期1631-1634,共4页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金项目(51275051)
北京市教育委员会创新能力提升计划项目(TJSHG201510017023)资助
关键词
低碳钢
熔化极气体保护焊
湿度
高压
力学性能
low carbon stell
gas metal arc welding （GMAW）
humidity
hyperbaric
mechanical property
