医疗器械用高氮不锈钢中厚板钨极氩弧焊接接头的组织与性能  

Microstructure and Mechanical Properties of GTAW Joint of High Nitrogen Austenitic Stainless Steel Medium Thick Plates for Medical Devices

作　　者：安瑞金[1] 赵琳[2] 田志凌[2] 彭云[2] 

机构地区：[1]北京儿童医院医疗器械科,北京100045 [2]钢铁研究总院结构材料研究所,北京100081

出　　处：《机械工程材料》2008年第12期55-58,共4页Materials For Mechanical Engineering

基　　金：国家重点基础研究规划(973)项目(2004CB619103)

摘　　要：采用钨极氩弧焊对7 mm厚的高氮不锈钢板进行了焊接,研究了焊接接头的组织和力学性能。结果表明:焊缝区和热影响区组织为奥氏体和δ-铁素体,当2%氮气加入保护气体时,焊缝强度明显提高,抗拉强度达到865 MPa,与母材(抗拉强度875 MPa)相当,且焊缝韧性也可获得提高;整个焊接接头具有良好的低温冲击韧性,-40℃时,焊缝区的冲击吸收功为70 J,熔合线附近的冲击吸收功为55 J,热影响区的冲击吸收功为60 J。Gas tungsten arc welding(GTAW) was used to weld 7 mm thick high nitrogen stainless steel.Microstructure and mechanical properties of the welded joint were studied.The results show that microstructure of weld zone and heat affected zone both was austenite and δ-ferrite.When 2% N2 was added to the shielding gas,tensile strength of the weld zone was remarkably increased to 865 MPa,close to that of the parent metal(875 MPa),and toughness was also increased.At-40 ℃,impact absorbed energy of the weld zone reached...

关 键 词：高氮奥氏体不锈钢 钨极氩弧焊 组织 力学性能 

分 类 号：TG457.11[金属学及工艺—焊接]