SiC_p/101Al复合材料的氩气保护炉中钎焊

Argon gas atmosphere furnace brazing of SiC_p/101Al composites

对SiC颗粒增强铝基复合材料SiCp/101Al的氩气保护炉中钎焊工艺及机理进行研究。结果表明,通过优化钎焊工艺参数,获得接头的剪切强度最大值可达90MPa;进一步对钎焊接头进行金相组织观察和钎缝相结构组成分析,钎缝组织致密,未发现有气孔、夹杂和微裂纹等缺陷,钎料和母材之间合金元素存在明显的互扩散,并且母材中有部分SiC颗粒过渡到钎缝之中;接头断口扫描观察显示,接头整体呈现韧性断裂特征。对钎焊接头的强度问题进行讨论。

The furnace brazing of 101 aluminium alloy reinforced with SiC particles protected by argon gas was studied in this paper. Results show that maximum value 90 MPa of brazed joint shearing strength can be attained by optimizing brazing technology parameters. Metallographic observation and XRD phase analysis demonstrate that the structure of brazed joint is dense, and no brazing defects such as gas holes, inclusion and microcrack can be found in brazed joints. Alloy elements in filler metal and base metal are ...