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| 激光冲击处理钛合金 | |
| 引用本文： | 邹世坤,曹子文,刘方军.激光冲击处理钛合金[J].中国激光,2007,34(s1):4-7. |
| 作者姓名： | 邹世坤 曹子文 刘方军 |
| 作者单位： | 邹世坤:北京航空制造工程研究所高能束流加工技术国防科技重点实验室， 北京 100024 曹子文:北京航空制造工程研究所高能束流加工技术国防科技重点实验室， 北京 100024 刘方军:北京航空制造工程研究所高能束流加工技术国防科技重点实验室， 北京 100024 |
| 基金项目： | 国防科技预研项目(513180302)和航空支撑项目(61901090202)资助课题。 |
| 摘 要： | 介绍了激光冲击处理(LSP)的特点和应用情况，研究了激光冲击处理对钛合金表面轮廓、残余应力和疲劳性能的影响。结果表明，经激光冲击处理后效果十分明显，钛合金获得光斑大小的凹坑，凹陷值10～20 μm，残余应力最大可达-600 MPa以上，表面残余应力水平与高强度喷丸相当，但塑性变形程度明显大于喷丸;合适的激光参数和搭接率可以获得光滑平整的冲击区，双光束冲击处理涡轮叶片后有明显冲击痕迹和残余压应力，并且没有发现变形和裂纹。 |
| 关 键 词： | 激光技术 激光冲击处理 表面轮廓 残余应力 钛合金 涡轮叶片 |
Laser Shock Processing of Titanium Alloy |
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| Abstract: | The characteristic and application of laser shock processing (LSP) was introduced, then the surface profile, surface residual stress and fatigue properties of laser shock processed titanium alloy were studied. The results showed that laser shock processing had obvious effects on titanium alloy. There was shocked zone on the surface of the metal after laser shock processing, which with the same size as laser spot and depression of 10～20 μm, the most residual stress was about -600 MPa, which corresponded to the result with intense shot peening, but the intensity of plastic deformation was much more than that of shot peening. Suitable laser parameters and overlap rate can gain smooth and even surface, there were obvious marks, little deformation and no cracks on the surface of dual beam laser shock processed titanium turbine blade. |
| Keywords: | laser technique laser shock processing surface profile residual stress titanium alloy turbine blade |