锻压技术

镁合金挤压变形工艺的研究进展

英文标题：Research progress of extrusion process for magnesium alloy

作者：卢立伟盛坤伍贤鹏尹振入

单位：湖南科技大学中南大学

分类号：TG376

出版年,卷(期):页码：2019,44(1):1-9

摘要：

镁合金是目前金属结构材料中最轻的材料，挤压变形是镁合金变形最常用的方法，在提高镁合金综合性能方面具有显著的作用。综述了镁合金挤压变形的传统挤压方法和非传统挤压方法，其中传统挤压方法包括正挤压、反挤压、等通道转角挤压等，非传统挤压方法包括等通道转角膨胀挤压、复合挤压、连续变截面直接挤压等；介绍了挤压变形在制备铝/镁合金复合材料等方面取得的研究进展；分析了不同挤压变形方法在细化镁合金晶粒、提高力学性能等方面的作用和机理。提出采用创新的挤压变形方法，制备出不仅具有优异的力学性能，而且兼备较高的抗腐蚀性能的铝/镁合金复合材料，将是镁合金挤压变形技术未来发展的趋势。

Magnesium alloy is the lightest metal structure material at present, and the extrusion process is the most commonly used deformation method for magnesium alloy. Therefore, it plays an important role in improving the comprehensive properties of magnesium alloy. Then, the traditional extrusion methods and nontraditional extrusion methods of magnesium alloy were reviewed, and the traditional extrusion methods include forward extrusion, backward extrusion and equal channel angle pressing etc., and the nontraditional extrusion methods include equal channel angle expansion extrusion, compound extrusion, continuous variable crosssection direct extrusion etc. Furthermore, the research progress of extrusion process in the preparation of Al/Mg alloy composites was introduced, and the effect and mechanism on grain refinement and mechanical properties improvement of magnesium alloy were studied by different extrusion deformation methods. Finally, an innovative extrusion deformation method was proposed to prepare Al/Mg alloy composites with excellent mechanical properties and high corrosion resistance, which would be the future development trend of extrusion technology for magnesium alloy.

基金项目：

国家自然科学基金资助项目(51505143)；湖南省教育厅优秀青年基金资助项目(17B089)；中国博士后科学基金(2016T90759 & 2014M562128)

卢立伟（1983-）,男，博士，副教授，E-mail：cqulqyz@126.com

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