摘要
采用五种不同的E316L药芯焊丝对316L不锈钢进行了焊接。五种不同的E316L焊丝对应的熔敷金属铁素体数分别为1.5,3.3,5.3,7.8,10.5。采用光学显微镜对焊接接头的组织形貌进行了观察,对五种焊接接头进行了-196℃低温冲击试验,采用扫描电镜对冲击断口形貌进行了观察。研究结果表明,五种不同焊丝对应焊接接头中的显微组织均为奥氏体组织和少量的铁素体组织。焊接接头中铁素体数为3.3时,其-196℃低温冲击韧性最佳,其平均值达到了37 J。随着焊接头中铁素体数的增加,-196℃低温冲击吸收能量下降。
Five different E316L flux cored wires were used to weld 316 stainless steel.The ferrite number of the deposited metal corresponding to five different E316L flux cored wires were 1.5,3.3,5.3,7.8 and 10.5,respectively.The microstructure morphology of welded joints was observed with optical microscope.The low-temperature impact tests at-196℃were carried out for five kinds of welded joints.The impact fracture morphology was observed by scanning electron microscope.The results show that microstructure of the five different welded joints is austenitic and ferrite.When the ferrite number of the welded joint is 3.3,the low temperature impact toughness at-196℃is the best,and its average value reaches to 37 J.With the increase of the ferrite number in the welded joint,the low temperature impact test value at-196℃decreases.
作者
袁军
孔维
梁天勤
胡名星
李仕川
YUAN Jun;KONG Wei;LIANG Tianqin;HU Mingxing;LI Shichuan
出处
《大型铸锻件》
2025年第3期12-16,共5页
Heavy Casting and Forging
基金
四川省科技厅科技计划项目(2023YFG0363)。
关键词
铁素体数
奥氏体不锈钢
焊接接头
-196℃低温冲击韧性
ferrite number
austenitic stainless steel
welded joint
low temperature impact toughness at-196℃
