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| Effect of laser characteristics on the weld shape and properties of penetration laser weld of BT20 titanium alloy | |
| 作者姓名： | 陈俐 巩水利 姚伟 胡伦骥 |
| 作者单位： | [2]NationalKeyLaboratoryofHighDensityBeamProcessingTechnology,BeijingAeronauticalManufacturingTechnologyResearchInstitute,Beijing,100024 [3]DepartmentofMaterialsScienceandEngineering,HuazhongUniversityofScienceandTechnology,Wuhan,410073 |
| 基金项目： | researching project，supported by the aeronautic funds project" The comparison of microstructures and properties of joints welded by CO2 laser，YAG laser welding |
| 摘 要： | The laser beam welding of BT20 titanium alloy was conducted to investigate the weld shape, microstructures and properties. The full penetration weld characteristics produced by CO2 laser and by YAG laser were compared. The results show that the full penetration weld of YAG laser welding closes to “X” shape, and weld of CO2 laser welding is “nail-head” shape.Those result from special heating mode of laser deep penetration welding. The tension strength of CO2 laser and YAG laser joints equal to that of the base metal, but the former has better ductility. All welds consist mainly of the acicular a phase and a few β phase in microstructure. The dendritic crystal of CO2 laser weld is a littlefiner than YAG laser weld. According theresearch CO2 laser is better than YAG laser for welding of BT20 titanium alloy. |
| 关 键 词： | 钛合金 BT20合金 激光焊接 CO2激光 YAG激光 显微结构 机械性能 焊缝 |
Effect of laser characteristics on the weld shape and properties of penetration laser weld of BT20 titanium alloy |
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| Chen Li,Gong Shuili,Yao Wei and Hu LunjiNational Key Laboratory of High Density Beam Processing Technology,Beijing Aeronautical Manufacturing Technology Research Institute,Beijing.Effect of laser characteristics on the weld shape and properties of penetration laser weld of BT20 titanium alloy[J].China Welding,2004,13(1):1-6. | |
| Authors: | Chen Li Gong Shuili Yao Wei and Hu LunjiNational Key Laboratory of High Density Beam Processing Technology Beijing Aeronautical Manufacturing Technology Research Institute Beijing |
| Affiliation: | 1. National Key Laboratory of High Density Beam Processing Technology,Beijing Aeronautical Manufacturing Technology Research Institute,Beijing,100024;Department of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,410073 2. National Key Laboratory of High Density Beam Processing Technology,Beijing Aeronautical Manufacturing Technology Research Institute,Beijing,100024 3. Department of Materials Science and Engineering,Huazhong University of Science and Technology,Wuhan,410073 |
| Abstract: | The laser beam welding of BT20 titanium alloy was conducted to investigate the weld shape, microstructures and properties. The full penetration weld characteristics produced by CO2 laser and by YAG laser were compared. The results show that the full penetration weld of YAG laser welding closes to "X" shape, and weld of CO2 laser welding is "nail-head" shape. Those result from special heating mode of laser deep penetration welding. The tension strength of CO2 laser and YAG laser joints equal to that of the base metal, but the former has better ductility. All welds consist mainly of the acicular α phase and a few β phase in microstructure. The dendritic crystal of CO2 laser weld is a little finer than YAG laser weld. According the research CO2 laser is better than YAG laser for welding of BT20 titanium alloy. |
| Keywords: | titanium alloy laser welding CO_2 laser YAG laser weld shape microstructures mechanical properties |
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