低温用碱性不锈钢焊条E308L-15的研制  

Development of E308L-15 stainless steel electrode for cryogenic application

作　　者：靳树强 马风辉 Jin Shuqiang;Ma Fenghui(voestalpine B hler Welding(China)Co.,Ltd.,Suzhou 215126,Jiangsu,China)

机构地区：[1]奥钢联伯乐焊接(中国)有限公司,江苏苏州215126

出　　处：《焊接》2020年第3期62-64,I0018,共4页Welding & Joining

摘　　要：文中介绍一种用于-196℃低温环境下的碱性奥氏体不锈钢焊条E308L-15。测试了熔敷金属的化学成分、铁素体数、金相组织、耐晶间腐蚀性能、室温强度和-196℃低温冲击韧性。结果表明,所开发的E308L-15焊条熔敷金属的金相组织由奥氏体和少量铁素体组成,并且随着熔敷金属氧含量的降低,-196℃夏比V形缺口冲击吸收能量增加,讨论了影响熔敷金属低温冲击韧性的因素,提出了提高熔敷金属低温冲击韧性的方法。This paper introduced the development of E308L-15 stainless steel electrode for cryogenic application(-196℃).The chemical composition,metallurgical structure,ferrite number,intergranular corrosive resistance,tensile strength and Charpy V notch impact absorbed energy at-196℃of deposited metal were investigated.The results showed that the metallurgical structure of deposited metal was composed of austenite and a small amount of ferrite.In the meantime,the impact absorbed energy of Charpy V notch impact test at-196℃increased with the oxygen content decrease of deposited metal.The factors that influenced the low-temperature impact toughness were discussed.Moreover,the method that could improve the low-temperature impact toughness was proposed.

关 键 词：E308L-15 熔敷金属 低温冲击韧性 奥氏体不锈钢 

分 类 号：TG422.1[金属学及工艺—焊接]