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首页> 外文会议>International Conference on Magnesium - Science, Technology and Applications; 20040920-24; Beijing(CN) >Research on Technology and Microstrutre Performance in Profile Extrusion of AZ31 Mg-Alloy
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Research on Technology and Microstrutre Performance in Profile Extrusion of AZ31 Mg-Alloy

机译：AZ31镁合金异型材挤压工艺及显微组织性能研究

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摘要

Aimed at characteristics of the profile such as complex shape, high dimensional accuracy and mechanical properties, the reduction zone length and devided flow taper of female die were designed by FEM and extrusion experiments were carried out for as-cast AZ31 magnesium alloy. Technological parameters were determined and microstructure and properties of the extruded profile were examined. The results show that magnesium alloy profile can be extruded if technological parameters such as deformation temperature, tool temperature and ratio of extrusion are controlled strictly. Each of the above mentioned technological parameters has its different influence on microstructure and properties of extruded profile. In comparison with as-cast alloys, microstructure is refined from 120～140 μm to about 10 μm and tensile strength is enhanced from 171～200MPa to above 260Mpa. This suggests that fine grain and high strength are attained for AZ31 magnesium alloy by extrusion deformation. The extruded profile can meet high properties demands for carrying parts. It provides a possibility for broader usage of magnesium alloy profiles.
机译：针对形状复杂，尺寸精度高和力学性能高等特点，通过有限元方法设计了凹模的缩小区长度和确定的锥度，并对铸态AZ31镁合金进行了挤压实验。确定技术参数，并检查挤压型材的微观结构和性能。结果表明，严格控制变形温度，工具温度和挤压比等工艺参数可以挤压镁合金型材。上述每个技术参数对挤压型材的组织和性能都有不同的影响。与铸态合金相比，显微组织从120〜140μm细化到约10μm，抗拉强度从171〜200MPa增强到260Mpa以上。这表明通过挤压变形可以使AZ31镁合金获得细晶粒和高强度。挤压型材可以满足承载零件的高性能要求。它为镁合金型材的更广泛使用提供了可能性。

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