摘要
选用Pb80Sn20钎料,对体积分数20%的SiCP/A356复合材料进行真空钎焊,分析了表面镀镍和不镀镍对其真空钎焊性的影响,并通过金相显微、能谱分析等手段研究了保温时间对其钎焊接头组织的影响。研究结果表明:体积分数20%的SiCP/A356复合材料表面不镀镍进行钎焊时,焊接性很差,镀镍后焊接性显著提高;对比6、8和10 min保温时间下钎焊接头硬度,8 min保温时间最好。
Using Pb80Sn20 alloy as filler metal, SiCr/A356 composite containing 20% (volume fraction) SiC was brazed by vacuum brazing process. The influences on the brazability of the composite were analyzed after nickel chemical-plating on the surface of composite and without nickel chemical-plating process. The effects of holding time on the microstructure of the brazed joints of the composite were studied by metallographic microscope, SEM and energy spectrum analysis. The results show that the nickel plating on the surface of the composite can improve the brazability of SiCp/A356 composite, while the inferior brazability is demonstrated if the surface of the composite without nickel plating process. The hardness of the welded joints which are brazed at holding time for 6 min, 8 min and 10 min was contrasted. The hardness of the weld seam region is highest when the holding time is 8 min.
出处
《热加工工艺》
CSCD
北大核心
2013年第5期161-163,共3页
Hot Working Technology
基金
焦作市重大攻关项目(新型电子封装器件的关键加工技术)
焦作市重大攻关项目(碳化硅颗粒增强铝基复合材料生产技术研发)
郑州机械研究所新型钎焊材料与技术国家重点实验室开放课题(SKLABFMT201002)