308L类不锈钢焊材熔敷金属-196℃冲击韧性研究

308L类不锈钢焊材熔敷金属-196℃冲击韧性研究 Research on impact toughness at -196 ℃ of deposited metal of 308L type stainless steel welding material 闵晓峰 MIN Xiaofeng 1 first-author 吴梦先 WU Mengxian 1 莫芝林 MO Zhilin 1 侯华东 HOU Huadong 1 蒋杰 JIANG Jie 1 邹大军 ZOU Dajun 2 武汉一冶钢结构有限责任公司 武汉一冶钢结构有限责任公司 Wuhan Yi Ye Steel Structure Co.,Ltd. Wuhan Yi Ye Steel Structure Co.,Ltd. 中国空气动力研究与发展中心 中国空气动力研究与发展中心 China Aerodynamics Research And Development Center China Aerodynamics Research And Development Center 通过对国内外不同品牌的308L类焊材进行SMAW、SAW、MIG焊熔敷金属试验,发现焊后热处理会显著降低熔敷金属-196℃冲击韧性,经过数据分析,认为铁素体含量是影响焊材熔敷金属低温韧性最重要的因素。对改良型的308L焊条及埋弧焊丝焊剂进行熔敷金属焊接试验,通过化学成分分析计算出焊材铁素体含量约为3 FN,经过570℃×1 h热处理后-196℃冲击值大于50 J。 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 ℃. 308L 焊材 焊后热处理 -196℃冲击韧性 308L welding material post weld heat treatment impact toughness at-196 ℃ TG457.11 2022-03-08 11 50