辽宁石油化工大学学报Issue(6)：42-44,48,4.DOI:10.3969/j.issn.1672-6952.2015.06.010
热焊工艺对2.25Cr1Mo 钢应力腐蚀性能的影响
The Influence of Hot Welding Process on Stress Corrosion Property of 2.25Cr1Mo Steel
摘要
Abstract
The 2.25Cr1Mo steel that was frequently used in petrochemical equipment was welded by hot welding process at 750 ℃ and 850 ℃.The welding residual stress of every welded specimen was measured by the small blind-hole method.The electrochemical workstation was used to measure the stress corrosion property of every welded specimen in alkaline,acidic and neutral medium.The microstructure of welded joint was analyzed by metallographic technique.The results showed the hot welding process could obviously reduce the welding residual stress of 2.25Cr1Mo steel welded plate and raise the stress corrosion property of it in every medium.In addition,the higher the process temperature was,the bigger the reduced degree of welding residual stress was,the more the stress corrosion property was improved.At 850 ℃,the welding residual stress was reduced by the degree of above 60% and the stress anti-corrosion property was raised by the degree of above 30%.The microstructure of welded joint was improved after high temperature welding.The mechanical property was maintained.关键词
热焊工艺/焊接残余应力/应力腐蚀/金相分析/盲孔法Key words
Hot welding process/Welding residual stress/Stress corrosion/Metallographic analysis/Blind-hole method分类
矿业与冶金引用本文复制引用
王国庆,闫萍,张智超,朱向哲..热焊工艺对2.25Cr1Mo 钢应力腐蚀性能的影响[J].辽宁石油化工大学学报,2015,(6):42-44,48,4.基金项目
国家自然科学基金面上项目(50903042)。 （50903042）
