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张满, 薛松柏, 戴玮, 娄银斌, 王水庆. 3003铝合金中温钎焊接头力学性能与显微组织[J]. 焊接学报, 2011, (3): 61-64.
引用本文: 张满, 薛松柏, 戴玮, 娄银斌, 王水庆. 3003铝合金中温钎焊接头力学性能与显微组织[J]. 焊接学报, 2011, (3): 61-64.
ZHANG Man, XUE Songbai, DAI Wei, LOU Yinbin, WANG Shuiqing. Mechanical properties and microstructure of 3003 Al-alloy brazed joint with Zn-Al filler metal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2011, (3): 61-64.
Citation: ZHANG Man, XUE Songbai, DAI Wei, LOU Yinbin, WANG Shuiqing. Mechanical properties and microstructure of 3003 Al-alloy brazed joint with Zn-Al filler metal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2011, (3): 61-64.

3003铝合金中温钎焊接头力学性能与显微组织

Mechanical properties and microstructure of 3003 Al-alloy brazed joint with Zn-Al filler metal

  • 摘要: 采用不同Al元素含量的中温Zn-Al钎料钎焊3003铝合金,研究了钎焊接头的力学性能及显微组织.结果表明,使用改进的CsF-AlF3钎剂,Zn-Al钎料在3003铝合金上具有良好的铺展性能.随着Al元素含量的增加,钎料在3003铝合金上的铺展性能明显改善,当Al元素含量为15%(质量分数)时铺展面积达到最大,且钎焊接头的抗拉强度最高,继续增加Al元素含量,铺展性能下降,同时钎焊接头的抗拉强度降低.钎缝组织分析表明3,003铝合金的Zn-Al钎料钎焊接头界面由三部分组成:母材、扩散区、界面区,扩散区宽度随Al元素含量升高而增大.钎缝主要由铝基固溶体与锌基固溶体构成.钎焊接头强度主要受钎缝内部块状组织的形态及分布影响,与扩散区宽度无关.

     

    Abstract: 3003 Al-alloy was brazed by Zn-Al filler metals with different Al contents.Mechanical properties and microstructure of the brazed joints were studied.The results indicated that the filler metal presented the best spreadability on 3003 Al-alloy substrate when the Al content was about 15%.However,the spread ability gradually deteriorated when Al content in Zn-Al filler metal exceeded 15%.The tensile strength of the brazed joint was measured and the brazed joint microstructures was observed by SEM,the results showed that by improving CsF-AlF3 flux,sound brazed joints could be obtained when Al content was lower than 15%,and three regions were found in the brazed joint interface:base metal,diffusion zone and interface zone.With the increase of Al content,the width of the diffusion zone increased.The results also showed that the tensile strength of the brazed joints was mainly affected by the shape and distribution of the massive microstructure in the brazing seam rather than the width of the diffusion zone.

     

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