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杨敏旋, 林铁松, 韩春, 何鹏, 魏红梅. Cu+B复合钎料配比对Al2O3/TC4合金钎焊接头界面组织的影响[J]. 焊接学报, 2012, (7): 33-36,40.
引用本文: 杨敏旋, 林铁松, 韩春, 何鹏, 魏红梅. Cu+B复合钎料配比对Al2O3/TC4合金钎焊接头界面组织的影响[J]. 焊接学报, 2012, (7): 33-36,40.
YANG Minxuan, LIN Tiesong, HAN Chun, HE Peng, WEI Hongmei. Effect of Cu+B composite fillers proportion on Al2O3/TC4 alloy joint microstructure[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (7): 33-36,40.
Citation: YANG Minxuan, LIN Tiesong, HAN Chun, HE Peng, WEI Hongmei. Effect of Cu+B composite fillers proportion on Al2O3/TC4 alloy joint microstructure[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2012, (7): 33-36,40.

Cu+B复合钎料配比对Al2O3/TC4合金钎焊接头界面组织的影响

Effect of Cu+B composite fillers proportion on Al2O3/TC4 alloy joint microstructure

  • 摘要: 分别以不同配比的铜和硼混合粉末作为钎料,在钎焊温度930℃,保温时间10 min条件下钎焊连接Al2O3与TC4合金,并结合SEM与EDS观察对钎焊接头的连接状况及组织结构进行分析.结果表明,Al2O3/TC4合金钎焊接头的界面组织为Al2O3/Ti3(Cu,Al)3O/Ti2Cu+Ti2(Cu,Al)/Ti+Ti2(Cu,Al)+Ti(Cu,Al)+AlCu2Ti+Ti2Cu/Ti2Cu+AlCu2Ti+TiB/Ti+Ti2Cu/TC4合金.钎焊过程中,复合钎料中的铜与TC4合金中的钛发生互扩散,在连接层与TC4合金界面形成不同成分的Cu-Ti化合物.硼与液相中的钛反应,在接头中原位生成TiB晶须,且主要分布在Ti2Cu和AlCu2Ti上.随TiB生成量的增加,Ti2(Cu,Al)生成量增加,并逐渐变得连续,同时向Al2O3侧移动.

     

    Abstract: The composite fillers with different proportions of Cu and B powders were used to braze Al2O3 to TC4 alloy at 930℃ for 10 min.The joining and microstructure of Al2O3/TC4 alloy joints were observed and analyzed by SEM and EDS.The results show that Al2O3/TC4 alloy joint interfacial microstructure is Al2O3/Ti3(Cu, Al)3O/Ti2Cu+Ti2(Cu, Al)/Ti+Ti2(Cu, Al)+Ti(Cu, Al)+AlCu2Ti+Ti2Cu/Ti2Cu+AlCu2Ti+TiB/Ti+Ti2Cu/TC4 alloy.Mutual diffusion of Cu atoms from composite filler and Ti atoms from TC4 alloly occurs during brazing process.Cu-Ti compounds with different components were formed in Al2O3/TC4 alloy joints.B reacts with Ti atoms in liquid, and in situ synthesizes TiB whiskers in joint, which mainly distribute into Ti2Cu and AlCu2Ti.With the increasing of TiB content, Ti2(Cu, Al) content increases, and becomes continuous gradually.At the same time, that moves to Al2O3 side.

     

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