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    郭韡, 王快社, 王文, 孙鹏, 王文礼. 镁合金表面的搅拌摩擦加工改性[J]. 机械工程材料, 2010, 34(5): 49-51.
    引用本文: 郭韡, 王快社, 王文, 孙鹏, 王文礼. 镁合金表面的搅拌摩擦加工改性[J]. 机械工程材料, 2010, 34(5): 49-51.
    shu
    GUO Wei, WANG Kuai-she, WANG Wen, SUN Peng, WANG Wen-li. Surface Modification of Magnesium Alloy Performed by Friction Stir Processing[J]. Materials and Mechanical Engineering, 2010, 34(5): 49-51.
    Citation: GUO Wei, WANG Kuai-she, WANG Wen, SUN Peng, WANG Wen-li. Surface Modification of Magnesium Alloy Performed by Friction Stir Processing[J]. Materials and Mechanical Engineering, 2010, 34(5): 49-51.
    shu

    镁合金表面的搅拌摩擦加工改性

    Surface Modification of Magnesium Alloy Performed by Friction Stir Processing

      摘要
    • 摘要: 采用搅拌摩擦加工技术通过加入Al2O3颗粒对AZ31镁合金进行表面改性,研究了表面复合层的显微组织、力学性能及加工速度对显微组织的影响规律.结果表明:采用该技术可在合金表面成功制备出Al2O3/AZ31表面复合层,当搅拌头的旋转速度为1 500 r·min-1、加工速度为23.5 mm·min-1时,Al2O3颗粒均匀地分布在镁合金基体上,且与基体结合较好;Al2O3颗粒对再结晶晶粒的晶界起到钉扎作用,可显著细化晶粒;得到的表面复合层的显微硬度为55 HV,比母材硬度提高41%,细晶强化和颗粒强化对硬度的提高起着主要作用.

       

      Abstract: Surface modification of AZ31 magnesium alloy was conducted by friction stir processing(FSP)and Al2O3 particles addition.The microstructure of surface composites,mechanical properties and the effect law of processing speed on the microstructure were studied.The results show that Al2O3/AZ31 surface composite layer could be successfully fabricated by the processing.Al2O3 particles were uniformly distributed in magnesium matrix and the surface composites had excellent bonding with the magnesium alloy substrate when the rotating rate was 1 500 r·min-1 and processing speed was 23.5 mm·min-1.The grains were refined because of the excellent pinning effect of Al2O3 particles.The microhardness of composite surface was 55 HV,which was increased by 41% compared with that of the AZ31 substrate.Both the grain refinement and the reinforcement increased the microhardness.

       

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