| 激光冲击对电火花修复SiCp/Cu复合材料裂纹力学性能的影响 |
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| 引用本文： | 张洁,祝乐,孙爱华,顾祥.激光冲击对电火花修复SiCp/Cu复合材料裂纹力学性能的影响[J].焊接学报,2009,30(12):17-20. |
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| 作者姓名： | 张洁 祝乐 孙爱华 顾祥 |
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| 作者单位： | 江苏大学,机械工程学院,江苏,镇江,212013 |
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| 基金项目： | 江苏省高技术研究计划，国家自然科学基金 |
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| 摘 要： | 利用钕玻璃激光冲击强化设备对经电火花堆焊修复的 SiCp/Cu 复合材料裂纹进行了激光冲击强化处理,研究了激光冲击强化处理对电火花堆焊修复裂纹的影响.用 X 射线应力仪测定了沿垂直焊缝方向表面残余应力的分布状况,用微机控制电子万能试验机测量拉伸性能,用显微硬度计测试了焊缝表面的显微硬度.结果表明,当激光脉冲能量为 35J,激光光斑直径为 5mm 时,激光冲击强化处理可以减小或消除焊缝表面残余拉应力,提高经电火花堆焊修复的 SiCp/Cu 复合材料裂纹试样的抗拉强度,还可以提高堆焊焊缝表面显微硬度.Abstract：The crack of SiCp/Cu composite weld restored by electro-spark overlaying was processed by Nd: glass laser, and effects of laser shock processing on the electro-spark overlaying weld crack were analyzed. Surface welding residual stress distribution alone the transverse direction of the weld was investigated by X-ray diffraction techniques, the tensile strength of the weld was investigated by strength test, and the micro-hardness distribution of the weld surface was measured with a micro-hardness tester. The results show that when laser power is 35 J and laser spot diameter is 5 mm, the laser shock processing can reduce the welding residual stresses,which even change from the tensile stress into compressive stress,and improve the tensile strength and the hardness of SiCp/Cu composite weld restored by electro-spark overlaying.
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| 关 键 词： | 激光冲击 电火花堆焊 残余应力 |
| 收稿时间： | 2009/4/7 0:00:00 |
Influence of laser shock processing on properties of SiCp/Cu composite weld crack restored by electro-spark overlaying |
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| ZHANG Jie,ZHU Le,SUN Aihua and GU Xiang.Influence of laser shock processing on properties of SiCp/Cu composite weld crack restored by electro-spark overlaying[J].Transactions of The China Welding Institution,2009,30(12):17-20. |
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| Authors: | ZHANG Jie ZHU Le SUN Aihua and GU Xiang |
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| Affiliation: | Mechanical Engineering Department, Jiangsu University, Zhenjiang 212013, China,Mechanical Engineering Department, Jiangsu University, Zhenjiang 212013, China,Mechanical Engineering Department, Jiangsu University, Zhenjiang 212013, China and Mechanical Engineering Department, Jiangsu University, Zhenjiang 212013, China |
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| Abstract: | The crack of SiCp/Cu composite weld restored by electro-spark overlaying was processed by Nd: glass laser, and effects of laser shock processing on the electro-spark overlaying weld crack were analyzed. Surface welding residual stress distribution alone the transverse direction of the weld was investigated by X-ray diffraction techniques, the tensile strength of the weld was investigated by strength test, and the micro-hardness distribution of the weld surface was measured with a micro-hardness tester. The results show that when laser power is 35 J and laser spot diameter is 5 mm, the laser shock processing can reduce the welding residual stresses,which even change from the tensile stress into compressive stress,and improve the tensile strength and the hardness of SiCp/Cu composite weld restored by electro-spark overlaying. |
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| Keywords: | laser shock processing electro-spark overlaying residual stress |
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