连续油管TIG焊接热影响区组织及性能热模拟分析  

Thermal simulation of microstructure and properties of heat-affected zone in TIG welding for coiled tubing

作　　者：张敏[1] 赵鹏康[1] 王文武[1] 李继红[1] 毕宗岳[1,2] 

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048 [2]宝鸡石油钢管有限责任公司,陕西宝鸡721008

出　　处：《兵器材料科学与工程》2011年第1期31-34,共4页Ordnance Material Science and Engineering

基　　金：陕西省教育厅自然科学基金资助项目(00k904);陕西省重点学科建设专项资金资助项目(00X901)

摘　　要：采用热模拟技术、显微分析方法和力学性能测试等手段,对连续油管用粒状贝氏体钢在TIG焊接过程中,接头热影响区不同部位的微观组织和宏观力学性能进行分析。与此同时,热影响区与母材组织及力学性能的对比表明,在接头热影响区中,过热粗晶区以长条状铁素体组织为主,冲击功相对较高。正火区和不完全正火区组织以多边形铁素体为主,晶粒之间晶界清晰,块状铁素体之间为片状和粒状珠光体组织,冲击功较低;回火区没有发生明显相变,晶粒尺寸比母材略有增加,组织发生了微小的回复再结晶,材料的冲击功有所回复。Microstructure and properties of heat-affected zone（HAZ） in TIG welding for granular bainite coiled tubing were analyzed by means of thermal simulation technique,microanalysis method and mechanical property testing.Compared with the base material,overheated coarse grain zone is composed of banded ferrite,and impact energy is relatively high.Microstructure of normalized area and not fully normalized area are mainly composed of polygonal ferrite,grain boundary is clear,at the same time,there are a lot of flake and granular pearlite between massive ferrite,impact energy is relatively low.There is not obvious phase change in tempered zone.The grain size of base metal is increased slightly,small recovery and recrystallization occur in the zone.As a result,impact energy increases slightly.

关 键 词：连续油管 粒状贝氏体钢 热模拟技术 热影响区 

分 类 号：TG407[金属学及工艺—焊接]