摘要
在自主设计研制的摩擦叠焊系统上对X52管线钢进行了摩擦塞焊工艺试验。观察和测试了接头的微观组织和力学性能。结果表明,摩擦塞焊工艺获得的接头强度比母材高,拉伸断口全部位于远离焊缝的母材;随着离焊缝中心距离的减少,硬度值逐渐增加,在焊缝中心附近达到最大260HV;焊缝中心0℃冲击功为109J,略低于结合界面处的119J。与母材290J的冲击功实测值相比,接头韧性降低的原因是由于焊接热循环过程中在焊缝及热影响区产生了粗大的贝氏体等组织。
The friction plug welding process test of X52 steel was carried out through friction hydro pillar process system designed autonomously. Microstructure and mechanical properties of the welded joints were observed and tested respectively. The results show that tensile strength of the welded joints are higher than that of the base material and all the specimens fractured at base material outside the HAZ. Hardness increases with the distance to centerline decreasing,the maximum value of hardness is around 260 HV near the weld center. Weld center 0 ℃, impact energy is 109 J,slightly lower than the combination of interface 119 J. Compared with base material whose impact value is 290 J,the reason the joint toughness decrease is that large amounts of coarse bainite produced during welding thermal cycle.
出处
《电焊机》
2015年第2期19-22,共4页
Electric Welding Machine
基金
国家高技术研究发展计划资助项目(863计划
2011AA090302)
