X80管线钢焊接接头残余应力的研究  

Research on Residual Stress of X80 Pipeline Steel Welded Joint

作　　者：于福松[1] 薛屺[1] 秦曾 蓝红[1] 

机构地区：[1]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《热加工工艺》2013年第21期28-31,共4页Hot Working Technology

摘　　要：在X80管线钢调质处理的基础上,进行手工电弧焊,并测定焊接接头的残余应力和显微硬度分布;通过金相观察、扫描电镜分析、能谱分析、XRD衍射,做了进一步研究。结果表明,焊接接头在垂直于焊缝方向上的纵向应力分布总体呈下降趋势,其显微硬度呈不断升高的趋势;二者之间分布曲线整体呈现相反的趋势。On the basis of hardening and tempering method, X80 pipeline steel was welded by manual electric arc welding. The residual stress and hardness distribution of the welded joint was measured. By metallographic observation, SEM analysis, EDS energy spectrum analysis and X-ray diffraction, further study was confirmed. The results show that after multi-pass welding, the distribution of residual stress variation perpendicularing to the welding seam presents a decreasing trend, while the distribution of hardness is in a rising pattern. The overall variation of the two curves is opposite.

关 键 词：微观结构 残余应力 硬度 热影响区 

分 类 号：TG404[金属学及工艺—焊接]