铜磷锡钎料钎焊黄铜接头组织及性能
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摘要
采用B-Cu90PSn钎料钎焊黄铜板获得对接接头,并测试其抗拉强度,利用扫描电镜及能谱仪对钎焊接头组织和断口形貌进行分析。结果表明,B-Cu90PSn钎料与母材实现良好的冶金结合,钎缝区主要由亮白色相和灰黑色相组成;其中灰黑色相呈小黑片状胞晶形貌,亮白色相由α固溶体和(α+δ)共析体组成并呈树枝状相间分布;对钎焊接头进行抗拉强度测试试验,结果表明,钎焊接头起裂源为焊缝相界面,断口由大量高密度短而弯曲的撕裂棱和浅而较大的准解理区域组成。
The brazed butt joint of brass plate was obtained with CuPSn brazing filler metal,and the tensile strength was measured.The microstructures and fracture morphology of the brazed joint were analyzed by scanning electron microscopy and energy dispersive spectrometer.The results show that the CuPSn brazing alloy and base metal achieve a good metallurgical bonding and the brazing zone is mainly composed of bright white phases and grayish black phases.In addition,the grayish black phase in the joint was in the form of a little black sheet cell crystal,and the bright white phase was consisted of solid solution and(α+δ)eutectoid with the dendritic interphase distribution.The fracture source in the brazed joint is the brazed interface and the fracture comprised of a large number of high-density short and curved tear edges and quasi-cleavage zones which are shallow and large.
The brazed butt joint of brass plate was obtained with CuPSn brazing filler metal,and the tensile strength was measured.The microstructures and fracture morphology of the brazed joint were analyzed by scanning electron microscopy and energy dispersive spectrometer.The results show that the CuPSn brazing alloy and base metal achieve a good metallurgical bonding and the brazing zone is mainly composed of bright white phases and grayish black phases.In addition,the grayish black phase in the joint was in the form of a little black sheet cell crystal,and the bright white phase was consisted of solid solution and(α+δ)eutectoid with the dendritic interphase distribution.The fracture source in the brazed joint is the brazed interface and the fracture comprised of a large number of high-density short and curved tear edges and quasi-cleavage zones which are shallow and large.
引文
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[3]龙伟民,张青科,马佳,等.浅谈硬钎料的应用现状与发展方向[J].焊接,2013(1):18-20.
[4]Long W M,Zhang G X,Zhang Q K.In situ synthesis of high strength Ag brazing filler metals during induction brazing process[J].Scripta Materialia,2015,110:41-43.
[5]张启运,庄鸿寿.钎焊手册[M].北京:机械工业出版社,2008:101-110.
[6]黄俊兰,龙伟民,张冠星.Sn元素对铜磷钎料性能和组织的影响[J].焊接,2012(3):2-6.
[7]张启运,庄鸿寿.三元合金相图手册[M].北京:机械工业出版社2011:430-438.
[8]孙茂才.金属力学性能[M].哈尔滨:哈尔滨工业大学出版社,2005.