【摘要】 采用CO2 激光器焊接SiCP/LD2复合材料 ,分析激光焊条件下接头的性能损失影响因素。研究结果表明 ,对于该种复合材料 ,在激光焊条件下 ,引起焊接接头性能损失的因素是多方面的。比如 ,脆性的反应物Al4 C3 相的生成 ,焊缝中由于较高的粘度而产生的孔洞与未熔合 ,以及蜂窝状气孔、氧化膜的存在等。其中对接头的性能损失影响最大的同时也是最难以消除的是铝碳界面相的生成。并提出了避免缺陷产生和改善接头性能的措施更多还原

【Abstract】 In this paper,continuous wave CO 2 laser was used to join SiC P/LD2 aluminum matrix composites and the factors degrading the properties of the joint were analyzed.The results showed that for this composites,the factors influencing on properties of the joint are various,for example,formation of the brittle aluminum carbide,porosity and incomplete fusion for high viscosity of molten pool,the existence of alveolate gas pores and aluminum oxide film.Of all the factors,the most primacy factor as well as the most difficult to eliminate is formation of aluminum carbide.The measures of avoiding defects and improving the properties of joint were proposed.更多还原