MIN Xiaofeng, WU Mengxian, MO Zhilin, et al. Research on impact toughness at -196 ℃ of deposited metal of 308L type stainless steel welding material[J]. 2020,50(11):135-138.
MIN Xiaofeng, WU Mengxian, MO Zhilin, et al. Research on impact toughness at -196 ℃ of deposited metal of 308L type stainless steel welding material[J]. 2020,50(11):135-138. DOI: 10.7512/j.issn.1001-2303.2020.11.25.
Through deposited metal tests of SMAW,SAW,MIG welding on 308 L type welding materials of different brands at home and abroad,it is found that the postweld heat treatment will significantly reduce the impact toughness of the deposited metal at-196 ℃,after data analysis,the ferrite content is considered to be the most important factor affecting the low temperature toughness of deposited metal of welding materials. Through welding test of deposited metal for improved308 L electrode,submerged arc welding wire and flux,the ferrite content of welding material is about 3 FN by chemical composition analysis,after heat treatment at 570 ℃ ×1 h,the impact value is greater than 50 J at-196 ℃.