2205钢不同焊接方法接头CTOD断裂韧度试验及分析  

Test and Analysis on Welded Joint CTOD of 2205 Duplex Stainless Steel Welded by Two Welding Methods

作　　者：张帅谋[1] 王小平[1] 陈彪[2] 张雪峰 

机构地区：[1]安徽机电职业技术学院机械工程系,安徽芜湖124000 [2]华中科技大学数字制造装备与技术国家重点实验室,湖北武汉430074 [3]新疆采油研究院,新疆克拉玛依384000

出　　处：《热加工工艺》2013年第3期140-142,共3页Hot Working Technology

基　　金：安徽省自然科学研究项目(KJ2012Z045)

摘　　要：依据英国标准BS7448,研究了焊条电弧焊(SMAW)和钨极氩弧焊(GTAW)焊接方法对SAF2205双相不锈钢管焊接接头低温CTOD断裂韧度的影响。结果表明,GTAW接头的CTOD值较SMAW接头的高,且几乎接近母材的CTOD值。利用金相显微镜和扫描电子显微镜研究了这两种方法焊接SAF2205钢管焊接接头的断口微观组织,发现GTAW和SMAW接头均现出"Pop-in"现象,并分析了CTOD值降低的原因。According to the British standard BS7448, crack tip opening displacement （CTOD） at low temperature tests of welded joint of 2205 duplex stainless steel tube was researched by shielded metal arc welding（SMAW） and gas tungsten arc welding （GTAW）. The results show that the CTOD value of GTAW is better than the SMAW joint value, and almost closing to the base material CTOD value. By optical microscope and SEM, the metallographic microstructure of fi＇acture of SAF2205 duplex stainless steel tube welded joints was observed by GTAW and SMAW. The results show that the ＂Pop-in＂ effect occurs in GTAW welded joints and SMAW joints. And the reasons for the decrease of the CTOD value was analyzed.

关 键 词：Pop-in现象 焊接方法 2205双相不锈钢管 CTOD 微观组织 

分 类 号：TG115.51[金属学及工艺—物理冶金]