308L类不锈钢焊材熔敷金属-196℃冲击韧性研究

闵晓峰; 吴梦先; 莫芝林; 侯华东; 蒋杰; 邹大军

doi:10.7512/j.issn.1001-2303.2020.11.25

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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
2020年50卷第11期页码：135-138
纸质出版：2020
DOI： 10.7512/j.issn.1001-2303.2020.11.25
稿件说明：

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闵晓峰, 吴梦先, 莫芝林, 等. 308L类不锈钢焊材熔敷金属-196℃冲击韧性研究[J]. 电焊机, 2020,50(11):135-138. DOI： 10.7512/j.issn.1001-2303.2020.11.25.

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]. Eletric Welding Machine2020, 50(11): 135-138. DOI： 10.7512/j.issn.1001-2303.2020.11.25.

摘要

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。

Abstract

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 ℃.