电焊机2024，Vol.54Issue(4)：135-140,147,7.DOI:10.7512/j.issn.1001-2303.2024.04.20
不同补焊次数对X2CrNi12铁素体不锈钢焊接接头耐点蚀性能的影响研究
Impact of Various Addition Welding Times on the Corrosion Resistance of X2CrNi12 Ferritic Stainless Steel Welded Joints
宋睿 1许鸿吉 1暴兴威1
作者信息
- 1. 大连交通大学 材料科学与工程学院,辽宁 大连 116028
- 折叠
摘要
Abstract
This study investigates the effects of varying numbers of re-weldings on the microstructure and pitting resistance performance of X2CrNi12 ferritic stainless steel using MAG welding.The results reveal that the microstructure of the weld zone in both the first and second re-weld joints is largely similar,primarily consisting of a white austenite matrix inter-spersed with black plate-like and net-like δ ferrite.Notably,the grain size of the welded joint significantly increases com-pared to the parent material.Electrochemical tests indicate that the corrosion resistance of the weld zone is superior to that of the parent material,while the HAZ exhibits the lowest corrosion resistance.Scanning Electron Microscope(SEM)observa-tions reveal no pitting in the weld zone,whereas small pits are uniformly distributed in both the parent material and HAZ.Furthermore,the corrosion resistance of the weld zone post the second re-weld surpasses that of the first re-weld.Conse-quently,a second re-weld enhances the pitting resistance performance of X2CrNi12 ferritic stainless steel welded joints.These findings provide a theoretical foundation for selecting appropriate re-welding times based on the electrochemical pit-ting performance of the welded joint.关键词
X2CrNi12不锈钢/补焊次数/点蚀/耐蚀性能/焊接接头Key words
X2CrNi12 stainless steel/weld repair times/pitting/corrosion resistance/weld joint分类
矿业与冶金引用本文复制引用
宋睿,许鸿吉,暴兴威..不同补焊次数对X2CrNi12铁素体不锈钢焊接接头耐点蚀性能的影响研究[J].电焊机,2024,54(4):135-140,147,7.
