摘要
研究了颗粒增强铝基复合材料ZL101A/SiCP/20p的电子束焊接工艺。研究表明,直接采用电子束焊焊接该类材料,难以获得焊缝成形。采用富Si非增强中间层,通过熔化中间层间接熔化两侧SiCP/Al,得到了较理想的焊缝成形。为获得良好焊缝成形,应合理选取中间层厚度、焊接速度和焊接电流及聚焦方式。采用非增强中间层电子束焊接气孔问题较突出。气孔主要发生于部分熔化的热影响区,快速焊接能使气孔形成受到部分抑制。
Electron beam welding of SiC particle reinforced aluminum matrix composites ZL101A/SiCp/20p was investigated. The results showed that direct welding without an insert between parts to be welded yielded cutting instead of welding, and ideal weld was achieved by using a Si-rich non-reinforced insert that melts side parent metal indirectly by its own melting. In order to obtain good weld, insert thickness, welding speed, current and focus mode should be carefully chosen. In this process porosity was serious, and pores appeared mainly in the partially melted zone. Rapid welding suppressed porosity to some extent.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2004年第12期16-20,24,共6页
Journal of Materials Engineering
基金
航空基金资助项目(00H21013)
关键词
铝基复合材料
电子束焊接
焊缝成形
气孔
aluminum matrix composites
electron beam welding
weld forming
porosity
