电焊机2017，Vol.47Issue(4)：29-33,5.DOI:10.7512/j.issn.1001-2303.2017.04.06
镀锌钢板CMT铜钎焊焊接缺陷敏感性研究
Study on weld defects sensitivity of CMT brazing galvanized steel sheets
牟刚 1张跃龙 1华学明 1王大明 2褚卫东2
作者信息
- 1. 上海交通大学材料科学与工程学院,焊接工程研究所激光制造实验室,上海200240
- 2. 上海拖拉机内燃机有限公司,上海200433
- 折叠
摘要
Abstract
Lap welding is operated with 1.5 mm thickness galvanized steel sheets to study the weld defect sensitivity of CMT brazing galvanized steel sheets for automobile.Four evaluation criteria are carried out to judge the weld defects sensitivity of brazing,which are wettability,spatters during weld process,weld geometry and bum-off of zinc deposits.And weld process window with few defects is obtained,that lap gap range is from 0 mm to 1 mm and current range is from 125 A to 152 A.Besides,through changing different shielding gas protection times after spot welding,a fact is confirmed that the dark substance on the brazing seam surface is due to the occurrence of CuO under high temperature.关键词
CMT铜钎焊/镀锌钢板/缺陷敏感性/氧化Key words
CMT brazing/galvanized steel sheet/defect sensitivity/oxidation分类
矿业与冶金引用本文复制引用
牟刚,张跃龙,华学明,王大明,褚卫东..镀锌钢板CMT铜钎焊焊接缺陷敏感性研究[J].电焊机,2017,47(4):29-33,5.
