激光与光电子学进展, 2018, 55 (6): 061407, 网络出版: 2018-09-11
光丝间距对304不锈钢激光-MIG复合焊接接头影响的研究 下载: 1078次
Influence of Laser-Arc Distance on Joint of 304 Stainless Steel by Laser-MIG Hybrid Welding
激光技术 激光-MIG复合焊 光丝间距 不锈钢 显微组织 力学性能 laser technique laser-MIG hybrid welding laser-arc distance stainless steel microstructure mechanical property
摘要
第三批外专计划、广东省省级科技计划项目、激光与等离子先进制造技术创新团队资助项;
Abstract
304 stainless steel joints with 5 mm thick are welded by laser-MIG hybrid welding with 10 kW disc laser. The influence of the laser-arc distance on the forming and mechanical properties of the welding seam is investigated, and the influence mechanism of the arc on microstructure and microhardness of the welding seam is analyzed. The results show that an optimized laser-arc distance not only have a synergistic effect between the laser heat source and the arc heat source, but also increases the stability of the droplet transfer. When the laser-arc distance is 1 mm, which makes an optimized distance, the droplet transition is stable and the welding seam is formed well. The tensile strength is 631.33 MPa, which is reaching to 98.6% of the strength of base metal. The microstructure of the welding seam is composed of austenite and skeletal and lath ferrites, and the microstructure of the upper part (Ⅰpart) of the welding seam is smaller than that of the middle part (Ⅱpart) and lower part (Ⅲ part) of the welding seam. The microhardness for the upper part of the welding seam is about 175 HV, which is equivalent to that of the base metal, the microhardness for the middle part of the welding seam is about 180 HV, and the microhardness for the lower part of the welding seam is about 190 HV, which are all lower than that of the heat affected zone.
韩丽梅, 蔡得涛, 张宇鹏, 张楠楠. 光丝间距对304不锈钢激光-MIG复合焊接接头影响的研究[J]. 激光与光电子学进展, 2018, 55(6): 061407. Limei Han, Detao Cai, Yupeng Zhang, Nannan Zhang. Influence of Laser-Arc Distance on Joint of 304 Stainless Steel by Laser-MIG Hybrid Welding[J]. Laser & Optoelectronics Progress, 2018, 55(6): 061407.