Effect of welding curr ent on microstructure and properties of 304 stainless steel Laser-MIG hybrid welding

SONG Shida; YANG Ziwei; QIAN Meixia; WANG kehong

doi:10.7512/j.issn.1001-2303.2020.07.09

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Effect of welding curr ent on microstructure and properties of 304 stainless steel Laser-MIG hybrid welding
Vol. 50, Issue 7, Pages: 59-63(2020)
DOI： 10.7512/j.issn.1001-2303.2020.07.09

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SONG Shida, YANG Ziwei, QIAN Meixia, et al. Effect of welding curr ent on microstructure and properties of 304 stainless steel Laser-MIG hybrid welding. [J]. 50(7):59-63(2020)
DOI：

SONG Shida, YANG Ziwei, QIAN Meixia, et al. Effect of welding curr ent on microstructure and properties of 304 stainless steel Laser-MIG hybrid welding. [J]. 50(7):59-63(2020) DOI： 10.7512/j.issn.1001-2303.2020.07.09.

摘要

采用激光-MIG复合焊对厚度6 mm的SUS304不锈钢进行拼接焊,比较不同焊接电流对接头显微组织及其性能的影响。EBSD分析显示焊缝择优取向为<001>方向,焊接电流为220 A的接头织构取向强度大于焊接电流为180 A的。力学性能检测表明接头硬度变化范围为170～195 HV。焊接电流为180 A时接头的强度和塑性大于焊接电流为220 A时的接头且低于母材。

Abstract

Using Laser-MIG hybrid welding,the effect of welding current of 180 A and 220 A on the microstructure and properties of 6 mm SUS304 stainless steel was compared. EBSD analysis showed that the preferred orientation of the weld was <001 > direction,and the texture orientation intensity of the joint with welding current of 220 A was greater than that of the welding current of 180 A. The test of mechanical properties shows that the hardness of the joint varies from 170 HV to 195 HV. The strength and plasticity of the joint with welding current of 180 A are higher than that of the joint with welding current of220 A and lower than that of the base metal.