摘要
分别采用316LMn,385,317L,308L和316L的焊条和氩弧焊丝焊接SUS304L,重点研究了焊缝金属在经过570℃×1 h热处理后-196℃冲击吸收能量及焊接工艺性能。385和316LMn全奥氏体熔敷金属低温韧性优异且稳定性好,308L,317L和316L的焊条和焊丝,通过优化平衡Cr,Ni当量控制铁素体数小于3,焊缝金属-196℃冲击值稳定在50 J以上。熔敷金属为全奥氏体的焊材焊接时,需要控制线能量,防止出现热裂纹,当熔敷金属Mn含量较高时,可以有效减少热裂纹的产生。SUS304L设备焊材选用时,需要进行综合考虑,合理选用国内外熔敷金属为超低碳全奥氏体或超低碳、低铁素体含量的焊材,在保证质量的前提下,可避免焊材性能匹配过渡溢出。
SUS304L was welded using 316LMn,385,317L,308L and 316L electrodes and argon arc welding wire respectively with focus on the research on the impact energy absorption and welding process performance of the weld metal after the heat treatment of 570℃×1 h at-196℃.385 and 316LMn all-austenite deposited metals have excellent low temperature toughness and good stability,for 308L,317L and 316L electrodes and wires,the number of ferrite is controlled to be less than 3 by optimizing the balance of Cr and Ni equivalents,and the weld metal has a stable impact value at-196℃above 50 J.It is needed to control the heat input to prevent hot cracks when the deposited metal is all-austenite welding material.When the manganese content of the deposited metal is high,the occurrence of hot cracks can be effectively reduced.When selecting welding materials for SUS304L equipment,it is necessary to comprehensively consider,and reasonably select the domestic and foreign deposited metals as the all-austenite welding material with ultralow carbon content or the one with ultralow carbon content or low ferrite content,so as to avoid the excessive overflow of welding material performance matching on the premise of ensuring the quality.
作者
闵晓峰
王元兴
吴梦先
潘伍覃
侯华东
蒋杰
MIN Xiaofeng;WANG Yuanxing;WU Mengxian;PAN Wuqin;HOU Huadong;JIANG Jie(Wuhan YiYe Steel Structure Co.,Ltd.,Wuhan 430415,China;China Aerodynamics Research And Development Center,Mianyang 621000,China)
出处
《压力容器》
北大核心
2021年第6期22-27,共6页
Pressure Vessel Technology
