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| 振荡激光扫描路径对TC11钛合金焊接组织性能的影响 |
| Effects of Beam Oscillating Path on Microstructure and Mechanical Properties of Laser Welded TC11 Titanium Alloys |
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| DOI：10.3969/j.issn.1674-6457.2023.03.002 |
| 中文关键词: TC11钛合金 气孔率 显微组织 拉伸性能 余弦振荡 圆形振荡 仿真 |
| 英文关键词: TC11 titanium alloy porosity microstructure tensile property cosine oscillation circular oscillation simulation |
| 基金项目:国家自然科学基金(52075393) |
| Author Name | Affiliation | | LUO Can | School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China | | ZHANG Chen | Institute of Technological Sciences, Wuhan 430072, China | | ZHAO Zhi-yuan | School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China | | PENG Wei-ping | School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China | | CHEN Xiao-long | Shanghai Xin Li Institute of Power Equipment, Shanghai 201100, China |
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| 中文摘要: |
| 目的 研究余弦振荡和圆形振荡激光焊接对TC11钛合金组织性能的影响。方法 通过气孔试验，得到了无振荡、余弦振荡和圆形振荡接头的气孔率;通过金相试验观察并分析了接头的微观组织;通过XRD试验得到了接头的物相构成;通过SEM试验观察并分析了接头的显微组织;通过拉伸试验，得到了接头的抗拉强度;通过仿真得到了激光焊接过程中的温度分布，并将仿真结果与试验结果进行了比对。结果 常规焊缝、余弦振荡焊缝、圆形振荡焊缝的气孔率分别为8.33%、5.67%、1.69%。3种焊缝的显微组织分布大体相同，均由焊缝熔合区、再结晶区和热影响区组成。圆形振荡激光焊接焊缝熔合区更细小。3种焊缝熔合区和再结晶区均产生α¢马氏体相，且焊缝熔合区的α¢马氏体相较多。常规激光焊接、余弦振荡激光焊接、圆形振荡激光焊接的抗拉强度分别为947.3、1 041.8、1 105.2 MPa，约为母材的85%、93.5%、99.2%。结论 采用余弦和圆形振荡扫描激光焊接方法均可以抑制焊缝的气孔率和提升焊缝强度，进而提升TC11高温钛合金焊缝的质量，其中以圆形振荡更优。 |
| 英文摘要: |
| The work aims to study the effects of cosine oscillation and circular oscillation laser welding on the microstructure and mechanical properties of TC11 titanium alloy. Through the porosity test, the porosity of the joints without oscillation, cosine oscillation and circular oscillation was obtained. The microstructure of the joints was analyzed by metallographic test and SEM test. The phase composition of the joints was obtained by XRD test. The tensile strength of the joints was obtained by tensile test. The temperature distribution in laser welding process was obtained by simulation. The simulation results were compared with the experimental results. The porosity of conventional weld, cosine oscillation weld and circular oscillation weld were 8.33%, 5.67% and 1.69% respectively. The microstructure distribution of the three kinds of welds was basically the same, and they were all composed of weld fusion zone, recrystallization zone and heat affected zone. The fusion zone of circular oscillation laser welding was smaller. The fusion zone and recrystallization zone of the three kinds of welds produced α'-phase. There were more α'-phase in the fusion zone. The tensile strength of conventional laser welding, cosine oscillation laser welding and circular oscillation laser welding were 947.3, 1 041.8 and 1 105.2 MPa respectively, which were about 85%, 93.5% and 99.2% of the base metal. Both cosine and circular oscillation scanning laser welding methods could suppress the porosity and improve the weld strength, thus improving the quality of TC11 titanium alloy weld, of which circular oscillation was better. |
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