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| 冲击工艺对铝合金激光熔覆的影响 | |
| 引用本文： | 孙福娟,刘洪军,胡芳友.冲击工艺对铝合金激光熔覆的影响[J].中国激光,2007,34(s1):27-30. |
| 作者姓名： | 孙福娟 刘洪军 胡芳友 |
| 作者单位： | 孙福娟:海军航空工程学院青岛分院， 山东 青岛 266041 刘洪军:海军航空工程学院青岛分院， 山东 青岛 266041 胡芳友:海军航空工程学院青岛分院， 山东 青岛 266041 |
| 摘 要： | 通过有效控制Nd:YAG 脉冲式激光器电流、脉冲宽度、频率、光斑直径、扫描速度、离焦量等有关工艺参数，对模拟腐蚀损伤的铝合金试样表面激光熔覆Al-Y(1.4%)合金，并对其中的一组试样进行机械冲击，充分时效后进行疲劳实验、疲劳断口分析及金相分析。研究结果表明，熔覆后机械冲击试样的疲劳寿命远远高于只熔覆不冲击试样的疲劳寿命，疲劳断口有明显的疲劳条带，熔覆层和基体结合得非常紧密，熔覆层内没有大的气孔和裂纹缺陷。 |
| 关 键 词： | 光学设计与制造 铝合金 激光熔覆 疲劳寿命 疲劳断口 金相组织 |
Effect of Shock on Laser Cladding of Aluminum Alloys |
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| Abstract: | Through control technological parameter of Nd:YAG pulse laser, current, pulse width, frequency, spot diameter, scanning velocity and defocusing, laser surface cladding Al-Y(1.4%) was used to repair corrosive damage of aluminum alloys. One group of the specimens was shocked on every cladding layer. After aging and fatigue test, crack pattern and microstructure were analyzed. The result showed that the fatigue life of the shocked specimens was much longer than the specimens’ without shock. The crack pattern of the shocked appeared fatigue strip, the microstructure showed there was no obvious pore and crack in the cladding layer which was metallurgy combination with the substrate. |
| Keywords: | optical design and fabrication aluminum alloys laser cladding fatigue life crack pattern microstructure |