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单一及复合氧化物活性剂对镁合金A-TIG焊的影响

马翔, 张兆栋, 刘黎明, 刘景和

马翔, 张兆栋, 刘黎明, 刘景和. 单一及复合氧化物活性剂对镁合金A-TIG焊的影响[J]. 焊接学报, 2007, (9): 39-42.
引用本文: 马翔, 张兆栋, 刘黎明, 刘景和. 单一及复合氧化物活性剂对镁合金A-TIG焊的影响[J]. 焊接学报, 2007, (9): 39-42.
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MA Xiang, ZHANG Zhaodong, LIU Liming, LIU Jinghe. Effects of single and composite component oxides activating flux-es on A-TIG welding of magnesium alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (9): 39-42.
Citation: MA Xiang, ZHANG Zhaodong, LIU Liming, LIU Jinghe. Effects of single and composite component oxides activating flux-es on A-TIG welding of magnesium alloy[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (9): 39-42.
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单一及复合氧化物活性剂对镁合金A-TIG焊的影响

  • 1.

    大连理工大学三束材料改性国家重点实验室及材料科学与工程学院, 辽宁大连 116024;长春理工大学材料科学与工程学院光电信息传输技术教育部重点试验室, 长春 130022

  • 2.

    大连理工大学三束材料改性国家重点实验室及材料科学与工程学院, 辽宁大连 116024

  • 3.

    长春理工大学材料科学与工程学院光电信息传输技术教育部重点试验室, 长春 130022

基金项目: 国家科技支撑计划(2006BAE04B05)

Effects of single and composite component oxides activating flux-es on A-TIG welding of magnesium alloy

  • 1.

    State Key Laboratory of Materials Modification & School of Materials Science and Engineering, Dalian University of Science and Engineering, Dalian 116024, China;The Ministry of Education Research Center of Photo-Electricity Information Transmit of Materials & School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China

  • 2.

    State Key Laboratory of Materials Modification & School of Materials Science and Engineering, Dalian University of Science and Engineering, Dalian 116024, China

  • 3.

    The Ministry of Education Research Center of Photo-Electricity Information Transmit of Materials & School of Materials Science and Engineering, Changchun University of Science and Technology, Changchun 130022, China

摘要

    摘要
  • 摘要: 以AZ31B变形镁合金为材料,采用五种单一氧化物MgO,Cr2O3,CaO,TiO2,MnO2进行混合配制得到复合配方。比较了无活性剂、涂敷单一TiO2活性剂和复合活性剂的焊缝熔深、接头金相组织、相组成及力学性能。结果表明,熔深达到最大的复合活性剂比常规TIG焊增加2.5倍左右,也比单一活性剂的熔深增加效果明显,同时其焊缝中晶粒比单一TiO2活性剂的晶粒细小,焊缝的抗拉强度比单一TiO2活性剂的高。经XRD分析复合配方中活性元素的加入改善了焊缝的相组成,避免了接头低熔点镁铝化合物脆性相的形成。
    Abstract: For AZ31B magnesium alloy materials, five kinds of single oxides MgO, Cr2O3, CaO, TiO2,MnO2 were used as the activating fluxes.The welding penetration, microstructures, phase composition and mechanical properties of welded joints without and with single oxide TiO2 and the composite oxide were compared.The results of experiments showed that welding penetration of compound fluxes is 2.5 times than conventional tungsten inert-gas welding, also deeper than that with single flux.The crystal grain of the composite fluxes is smaller than that of single TiO2 flux, and the tensile strength of the composite fluxes sample is superior to single TiO2 flux sample. The activating element was added into weld that improve the phase composition of compound fluxes, which avoid the formation of the low-melting point magnesium-aluminum phase in the welded joint.
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  • 收稿日期:  2006-02-17

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