| 铝基复合材料SiCW/6061Al的激光焊接 |
| |
| 引用本文： | 刘黎明,祝美丽,徐卫平,牛济泰.铝基复合材料SiCW/6061Al的激光焊接[J].焊接学报,2001,22(4):13-16. |
| |
| 作者姓名： | 刘黎明 祝美丽 徐卫平 牛济泰 |
| |
| 作者单位： | 1. 大连理工大学材料工程系,
2. 哈尔滨工业大学, |
| |
| 基金项目： | 国家自然科学基金资助项目 ( 5 9785 0 16)，华中科技大学激光技术国家重点实验室开放基金资助项目 ( 2 0 0 0
[0 0 2 ] ) |
| |
| 摘 要： | 采用脉冲激光焊接工艺研究铝基复合材料SiCw/6061Al的焊接性，着重探讨激光输出功率（P）、脉冲频率（f) 对接头性能的影响，借助X射线衍射、扫描电镜、透射电镜等手段分析接头组织。研究发现，焊缝中存在的界面反应物、气孔缺陷，是导致该种材料焊接性显著降低的主要因素。进一步研究表明，在激光焊接条件下铝基复合材料界面反应是不可避免的，反应物沿热流方向生成，具有一定的方向性，激光输出功率是影响SiC-Al界面反应的主要因素，同时提高脉冲频率将对界面反应有一定的抑制作用；焊缝中气孔随激光脉冲频率的增大而减少直至消失。在此基础上，通过制定合理的焊接工艺，获得了成形良好的铝基复合材料激光焊焊缝。
|
| 关 键 词： | 铝基复合材料 激光焊接 碳化硅 |
Laser Welding Mechanism and Parameters of Aluminum Matrix Composite SiCw/6061Al |
| |
| LIU Li,ming.Laser Welding Mechanism and Parameters of Aluminum Matrix Composite SiCw/6061Al[J].Transactions of The China Welding Institution,2001,22(4):13-16. |
| |
| Authors: | LIU Li ming |
| |
| Abstract: | The weldability of the aluminum matrix composite SiCw/6061Al by pulse laser welding technique have been studied.The effects of laser output power (P),pulse frequency(f) on the properties of the welded joint has been investigated emphatically,and the microstructure of the welded joint has been analyzed by scanning electron microscopy,X ray diffraction and transmission electron microscopy.The results show that the defects in the weld such as interface reactant and pore are the key factors to reduce the material weldability.The further investigations reveal that the interfacial reaction of reinforcement/matrix of the composite in the weld is inevitable at laser welding,the reactants are of directivity and grow in the direction of heat flow.The main welding parameter for affecting SiC Al interface reaction is laser output power,and increasing the pulse frequency can restrain the interfacial reaction to some extent,and the amount of the pore in the weld would decrease or vanish with increasing the laser pulse frequency.On the basis of this,the good weld for the aluminum matrix composite has been obtained by making proper welding processing parameters. |
| |
| Keywords: | aluminum matrix composite laser welding |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
