Study on Welding Process and Microstructure and Properties of Titanium Alloy Narrow Gap Laser Filler Wire
FANG Naiwen1, HUANG Ruisheng1, *, WU Pengbo1, YIN Limeng2, LONG Weimin3, XU Kai1, CAO Hao1, ZOU Jipeng1
1 Harbin Welding Institute Limited Company, Harbin 150028, China 2 School of Metallurgy and Materials Engineering, Chongqing University Science & Technology, Chongqing 401331, China 3 State Key Laboratory of Advanced Brazing Filler Metals & Technology, Zhengzhou Research Institute of Mechanical Engineering Co., Ltd., Zhengzhou 450001, China
Abstract: A self-developed Ti-Al-V-Mo titanium alloy flux-cored wire was used as the filler metal in the experiment of narrow gap laser welding with filler wire for TC4 titanium alloy plate. The effects of laser power, oscillation parameter, oscillation mode, welding speed and wire feeding speed on weld formation were studied. The characteristics of plume and plasma in the welding process were investigated using high-speed camera system, and microstructures and properties of the welded joints were analyzed. The results showed that the weld formation was good with no obvious appearance defects found, with a laser power of 4.0 kW, a oscillation frequency of 100 Hz and oscillation range of 2 mm under the circular oscillation mode, a welding speed of 0.42 m/min, and a feeding speed of 0.6 m/min; when the end of the welding wire was 0 mm away from the liquid molten pool, the transfer mode was liquid bridge transfer, which helped to realize the stable and orderly transfer of the molten metal from the wel-ding wire to the molten pool; the 20 mm thick TC4 titanium alloy plate welded joint by narrow gap laser welding with filler wire using this welding technology achieved good microstructures and properties.
方乃文, 黄瑞生, 武鹏博, 尹立孟, 龙伟民, 徐锴, 曹浩, 邹吉鹏. 钛合金窄间隙激光填丝焊接工艺及接头组织性能分析[J]. 材料导报, 2023, 37(10): 22010253-1.
FANG Naiwen, HUANG Ruisheng, WU Pengbo, YIN Limeng, LONG Weimin, XU Kai, CAO Hao, ZOU Jipeng. Study on Welding Process and Microstructure and Properties of Titanium Alloy Narrow Gap Laser Filler Wire. Materials Reports, 2023, 37(10): 22010253-1.
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2023, Vol. 37 
