氩弧重熔对管线钢接头表层组织的影响  

Effects of TIG Treatment on the Surface Structure of the Pipeline Joint

作　　者：薛小怀[1] 国旭明[2] 钱百年[2] 楼松年[1] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200030 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《热加工工艺》2002年第4期25-26,共2页Hot Working Technology

基　　金：国家 973计划资助项目 ( G19980 6 1511);辽宁省博士启动基金资助 ( 2 0 0 110 2 0 2 8)

摘　　要：采用氩弧重熔单道和多道处理管线钢接头 ,不仅使焊缝表层的柱状晶组织细化 ,而且使接头焊趾部位出现圆滑过渡 ,同时也细化了焊趾部位热影响区中的粗大晶粒。TIG treatment process eliminated the column grain structures of surface layer of welds. The size of acicular ferrite was greatly refined and grain boundary ferrite and side-plate ferrite disappeared. This process also can make the welding toe more smooth, which can eliminate the stress concentration there and refine the coarse HAZ grain structure. These are beneficial to the fatigue and corrosion properties of the pipeline joint.

关 键 词：管线钢 氩弧重熔 晶粒细化 焊趾圆滑过渡 焊接接头 

分 类 号：TG457.6[金属学及工艺—焊接] TG441.8