化工管道用超低碳微合金管线钢焊接接头的微观组织和冲击性能研究  

Study on Microstructure and Impact Properties of Welding Joint of Ultra-low Carbon Microalloy Pipeline Steel

作　　者：刘妹琴[1] 

机构地区：[1]天津科技大学,天津300222

出　　处：《铸造技术》2015年第10期2550-2552,共3页Foundry Technology

摘　　要：采用光学显微镜、扫描电子显微镜、透射电镜和冲击试验机对化工管道用超低碳微合金管线钢焊接接头的微观组织和冲击性能进行研究。结果表明,超低碳微合金管线钢焊接接头焊缝区和热影响区的显微组织明显不同,且与母材的微观组织也存在差异。在温度为-10℃时,超低碳微合金管线钢焊接接头的冲击功为177 J,断裂方式为韧性断裂。The microstructure and impact properties of welding joint of ultra-low carbon microalloy pipeline steel were studied by optical microscope,scanning electron microscope,transmission electron microscope,and impact testing machine.The results show that there is obvious difference between the microstructure of welding zone,heat affected zone and the matrix.The impact energy of ultra-low carbon microalloy pipeline steel welding joint is 177 J at-10 ℃,and the fracture mode of welding joint is ductile fracture.

关 键 词：焊接 微观组织 冲击性能 

分 类 号：TG407[金属学及工艺—焊接] TQ055.81[化学工程]