GAO Jian, SONG Xiaojiao, PAN Lihua, et al.Study on the Quality Control of Arc Crater in Laser Welding Girth Weld[J].Electric Welding Machine, 2022, 52(5): 112-116.
GAO Jian, SONG Xiaojiao, PAN Lihua, et al.Study on the Quality Control of Arc Crater in Laser Welding Girth Weld[J].Electric Welding Machine, 2022, 52(5): 112-116. DOI: 10.7512/j.issn.1001-2303.2022.05.16.
Study on the Quality Control of Arc Crater in Laser Welding Girth Weld
The arc crater is an inherent defect of laser welding. In order to reduce the influence of the arc crater on the formation and mechanical properties of the thin-walled girth weld joint, a laser welding butt test was carried out on a 2 mm thick 30CrMnSi high-strength steel cylinder, and the laser welding receiving arc crater was studied. The formation reasons and the influence of process parameters on the forming of the arc crater, the microstructure and mechanical properties of the weld joints of the arc segment are tested. The results show that the arc time and welding speed have a greater influence on the depth of the arc crater. When the time is 2 s, the welding speed can be increased from 1.2 m/min to 2.4 m/min at a constant speed to obtain a better arc closing section weld formation,the arc closing crater depth is 0.08 mm. The tensile test shows that the arc closing The pit has no obvious influence on the tensile strength of the welded joint, and the quality and mechanical properties of the weld meet the requirements of the first-level weld in QJ 20659-2016.
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