电焊机2017，Vol.47Issue(5)：129-132,4.DOI:10.7512/j.issn.1001-2303.2017.05.28
热水器内胆焊缝热影响区缺陷分析
Study on the defect of heat affected zone of welds on water heater tank
汤亨强 1吴浩1
作者信息
- 1. 马鞍山钢铁股份有限公司,安徽马鞍山243000
- 折叠
摘要
Abstract
When carrying out a water pressure test on a water tank,the cracks around the welds are the main factor that make it unqualified,which causes huge lost to a company.A certain water heater tank is selected as the sample of study in this paper,through the SEM,metalloscope and macroscopic observation,the reasons of cracks under water pressure are discussed and analyzed.The result shows that the plastic deformation of heat affected zone occurring before welding can easily causes stress concentration and produces Mole Distortion Energy Es,where the grains will easily recrystallize and gradually grow up within the welding heat input,and then big grains are formed,which causes the cracks even fracture during the water pressure test.关键词
热水器内胆/焊缝开裂/水压测试/热影响区Key words
water heater tank/weld crack/water pressure test/HAZ分类
矿业与冶金引用本文复制引用
汤亨强,吴浩..热水器内胆焊缝热影响区缺陷分析[J].电焊机,2017,47(5):129-132,4.
