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| 不锈钢与钛合金纳秒激光焊接工艺研究 |
| Technical Study on Nanosecond Laser Welding of Stainless Steel and Titanium Alloy |
| Received:February 25, 2021 |
| DOI：10.3969/j.issn.1674-6457.2021.04.022 |
| 中文关键词: 纳秒激光器 不锈钢 TC4钛合金 激光焊接 |
| 英文关键词: nanosecond laser stainless steel TC4 titanium alloy laser scanning |
| 基金项目:中山市2020年省科技专项资金(2020sdr004) |
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| 中文摘要: |
| 目的 针对不锈钢与钛合金异种金属焊接时，容易产生间化合物，导致焊点拉力低的现象，通过纳秒激光焊接工艺来提高不锈钢与钛合金异种金属焊接的焊点拉力。方法 采用纳秒光纤激光器进行304不锈钢与TC4钛合金的焊接实验，通过激光运行螺旋线组成焊点，并对工艺参数进行正交试验，得到焊点拉力最大的工艺参数。结果 当激光功率为90 W，激光频率为600 kHz，焊接速度为200 mm/s，螺旋线间距为0.04 mm，脉冲时间为10 ns时，得到焊点拉力最大，为29 N。结论 采用纳秒光纤激光器进行不锈钢与钛合金的焊接时，由于激光与材料作用的时间极短，约为10 ns，熔池的温度也相对较低，产生的间化合物来不及生长，从而极大提高了焊点的拉力。 |
| 英文摘要: |
| During stainless steel and titanium alloy dissimilar metal welds, it was easy to produce inter-compound, resulting in low solder joint tension. This paper aims to improve the tension of the welding spot. The welding experiment of 304 stainless steel and TC4 titanium alloy was carried out using nanosecond laser. The welding spot was composed of laser running helix. Through orthogonal experiment on the process parameters, the maximum welding force was obtained. When the laser power was 90 W, the laser frequency was 600 kHz, the welding speed was 200 mm/s, the helix spacing was 0.04 mm, and the pulse time was 10 ns, the maximum solder joint tension was 29 N. When stainless steel and titanium alloy were welded using nanosecond fiber laser, the time of laser and material action was very short, which was 10 ns, the temperature of the molten pool was relatively low, and the produced inter-compound was too late to grow, which can greatly improve the tension of the weld spot. |
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