采用非增强中间层电子束焊接SiC_P/Al

Electron beam welding of SiC_P/Al composite with non-reinforced insert

为解决SiCP/Al焊接成形问题,提出了采用非增强中间层的电子束焊新工艺。考察了非增强中间层对碳化硅颗粒增强铝基复合材料(SiCP/Al)电子束焊接成形、脆性相Al4C3生成及气孔的影响。研究表明,采用富Si非增强中间层后,焊接成形明显改善,脆性相的形成也受到了抑制,但气孔问题比较突出。讨论了工艺和材料因素对焊接缺陷和接头力学性能的影响,由此获得SiCP/Al电子束焊的工艺要点。

In order to solve the problem of weld formation, a new process using non-reinforced insert was put forward for elctron beam welding of SiC particle reinforced aluminum matrix composites. The influence of non-reinforced insert on weld forming characteristics, the formation of brittle compound Al4C3 and porosity was investigated. The results show that the non-reinforced insert can improve the weld formation quality obviously and suppress the formation of Al4 C3, but the porosity problem is still serious. On the basis of a discussion of the influence of process and composition on weld defects and mechanical properties of welded joints, several main technical points were obtained.