硅酸盐通报2017，Vol.36Issue(1)：315-320,6.
温度及表面金属化对铝基复合材料与可伐合金真空钎焊的影响
Effects of Temperature and Surface Metal Plating on Vacuum Brazing between Aluminum Alloy Matrix Composites and Kovar Alloy
摘要
Abstract
Using Al63-Cu22-Ti5-Si10 as brazing alloy, vacuum brazing between 55% vol. SiC particle reinforced aluminium matrix composites (55% SiCp/Al MMCs) and kovar alloy was investigated. The effects of brazing temperature and different plating material on the surface of SiCp/Al MMCs on joint shear strength and joint microhardness was analyzed, respectively. The microstructure characteristic of joint was studied as well. The results indicate that brazing temperature and plating material have significant influence on the joint mechanical property. With the same brazing processing parameters, the shear strength of specimen SiCp/Al MMCs covered by copper is much higher than those of covered by nickel and non-cover. The maximum shear strength can reach 92. 8 MPa. With the increasing of brazing temperature from 560 ℃ to 580 ℃, the shear strength decreases gradually and then increases. For the specimens with different plating material, the maximum shear strength of joint can be achieved at the brazing temperature 560 ℃. With the same brazing temperature, specimen covered by copper has the maximum microhardness and the specimen covered by nickel has the minimum microhardness. The microstructure of joint is quite dense and free from defects such as void and non-wetting area. After brazing, the plating metal has disappeared and it was replaced by brazing alloy. By using brazing filler alloy Al63-Cu22-Ti5-Si10 , the reasonable brazing temperature is 560 ℃ and the reasonable plating material is copper on the surface of composite under the parameters of vacuum degree 6 . 5 × 10 -3 Pa and soaking time 30 min.关键词
铝基复合材料/真空钎焊/温度/镀层Key words
aluminium matrix composite/vacuum brazing/temperature/plating material分类
通用工业技术引用本文复制引用
高增,夏任岭,秦少磊,米国发,牛济泰..温度及表面金属化对铝基复合材料与可伐合金真空钎焊的影响[J].硅酸盐通报,2017,36(1):315-320,6.基金项目
国家自然科学基金(51245008) （51245008）
河南理工大学博士基金(B2014-006) （B2014-006）
