摘要
采用表面金属化工艺在60%SiCp/6063Al复合材料表面制备镀铜层和镀镍层,然后对表面金属化处理前的复合材料进行真空加压钎焊,研究了镀镍和镀铜对复合材料钎焊接头剪切强度的影响。结果表明:复合材料表面镀层均与基体紧密结合;在570℃的钎焊温度下,随着保温时间延长,钎焊接头的剪切强度逐步增大;与表面镀镍及未镀金属的相比,表面镀铜复合材料接头的剪切强度更高,接头的剪切强度最高可达55.4 MPa,且其剪切断裂发生在钎料层和复合材料内部;镀镍会降低接头的剪切强度。
Using surface alloying technique, copper layer and nickel layer were deposited on the SiCp/6063 Al composites with 60% volume fraction of Si C. Then, SiCp/6063 Al composites before and after surface alloying were vacuum brazed respectively. The effects of copper layer and nickel layer on the shear strength of the brazed joints were studied. The results indicate that the two plating layers combined with base metal compactly. As prolonging the heat preservation time, the shear strength of the brazed joints rose synchronously at 570 ℃. The brazed joint of the composite with copper plating on surface had higher shear strength than that with nickel plating, and the top value hit 55.4 MPa. The shear fracture occurred on the inside of composites and in the brazing fi ller metal. Nickel plating decreased the shear strength of the joint.
出处
《机械工程材料》
CAS
CSCD
北大核心
2015年第6期1-6,共6页
Materials For Mechanical Engineering
基金
科技部中小型企业创新基金项目(11C26214105167)
焦作市工业新材料科技项目(2010
49号)
解放军总装备部预研项目(51318050119-1)
