05Cr19Ni6Mn4MoCu2N奥氏体不锈钢的焊接工艺

Welding process of 05Cr19Ni6Mn4MoCu2N austenitic stainless steel

室温下,以铬-锰-镍-氮系奥氏体不锈钢材料05Cr19Ni6Mn4MoCu2N试板为研究对象,采用手工TIG填丝焊接方法、V形对接坡口形式,以ER316L低碳焊丝为焊接材料,并采用小电流、快速焊的工艺施焊;借助万能试验机、光学显微镜等测试设备进行焊接工艺评定试验。结果表明,05Cr19Ni6Mn4MoCu2N焊接接头未见气孔、裂纹、夹杂、过烧等缺陷,质量优良;焊接接头平均抗拉强度690 MPa,优于母材;焊接接头弯曲试验受拉面均未出现裂纹,焊接接头的强度、塑韧性均满足标准要求。故05Cr19Ni6Mn4MoCu2N试板的焊接工艺,为该项目的焊接生产提供技术支持和应用指导。

At room temperature,Cr-Mn-Ni-N austenitic stainless steel 05Cr19Ni6Mn4MoCu2N test plate was used as the research object.Manual TIG with wire filling and V butt groove,ER316L low-carbon welding wire as the welding material,and welding process with small current and fast welding were applied.Tests of welding procedure qualification were carried out with universal testing machine,optical microscope and other testing equipment.The results showed that 05Cr19Ni6Mn4MoCu2N welded joints had no defects such as porosity,crack,inclusion and over-burn,and had good quality.The average tensile strength of welded joints was 690 MPa,which was better than that of base metal.No crack appeared on tensile surface of welded joints in bending test.The strength,plastic and toughness of welded joints met requirements of the standard.Therefore,welding process of 05Cr19Ni6Mn4MoCu2N test plate coulded provide technical support and application guidance for welding production of the project.