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王星星,王 博,韩林山,龙伟民,唐明奇.化学镀锡钎料钎焊黄铜的接头组织和力学性能[J].稀有金属材料与工程(英文),2018,47(1):367~370.[WangXingxing,Wang Bo,Han Linshan,Long Weimin,Tang Mingqi.Effect of Brazing Alloys with Tin Electroless Plated on Microstructure and Mechanical Properties of Brass Brazed Joints[J].Rare Metal Materials and Engineering,2018,47(1):367~370.]
Effect of Brazing Alloys with Tin Electroless Plated on Microstructure and Mechanical Properties of Brass Brazed Joints
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Received:October 14, 2015  Revised:December 01, 2015
DOI:
Key words: silver brazing filler metal with tin coating  brazing  microstructure  tensile strength
Foundation item:国家自然科学基金项目(51301070);河南省产学研合作计划项目(150042);华北水利水电大学博士基金项目
Author NameAffiliationE-mail
WangXingxing North China University?of?Water Resources and Electric Power wangxingxing@ncwu.edu.cn 
Wang Bo 华北水利水电大学 442806528@qq.com 
Han Linshan 华北水利水电大学  
Long Weimin State Key Laboratory of Advanced Brazing Filler Metals and Technology,ZRIME  
Tang Mingqi 华北水利水电大学  
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Abstract:
      H62 brass joints were brazed successfully using BAg45CuZn brazing filler metals plated tin coatings. SEM and XRD were used to observe the surface microstructure and phase of tin coatings and H62 brass brazed joint. The tensile strength of H62 brass brazed joints were analyzed using tensile test machine. The results show that the crystallization orientation of tin coating displays (110) and (210) crystal faces. The interface brazing seam and H62 brass produce sound brazed joints after tin electroless plated on filler metal. Then Cu-rich phase in the microstructure of brazed joints decrease, but the Cu5Zn8 intermetallic compound generate. The tensile strength of brazed joints initially increase and then decrease with increasing of plating tin content. When the content of tin electroless plated coating is 6.0 %(wt.%), the maximum tensile strength of brass brazed joints is 353 MPa. The fracture morphology of brazed joints using filler metal with tin coatings display ductile fracture which the same with the joints using the BAg45CuZn brazing filler metal.