挤压铸造镁合金研究进展-中国材料进展

文章信息/Info

Author(s):: JIA Hailong; ZHANG Mengna; YANG Ming; ZHAO Lei; ZHA Min; WANG Huiyuan; (Key Laboratory of Automobile Materials of Ministry of Education, School of Materials Science and Engineering， Jilin University，Changchun 130025，China)

Keywords:: squeeze casting; magnesium alloys; microstructure; process parameters; mechanical properties

摘要:: 镁合金具有密度低、比强度高和阻尼性好等优点，在汽车、轨道交通及航空航天等领域应用潜力巨大。然而，传统铸造工艺，特别是常规重力铸造和低压铸造工艺所制备的镁合金材料存在着难以避免的铸造缺陷。挤压铸造作为一种近净成形技术，可制备出力学性能良好、宏观缺陷少的镁合金产品，对镁合金的发展及应用具有重要意义。介绍了挤压铸造工艺的特点，综述了挤压铸造镁合金的最新研究进展，主要包括挤压铸造镁合金微合金化和镁合金挤压铸造工艺参数优化，重点阐述了挤压铸造镁合金微观组织和力学性能调控，为挤压铸造镁合金成分设计和高强塑性镁合金制备提供借鉴。最后，从实验和理论两个方面对挤压铸造镁合金的未来研究方向和面临的挑战进行了讨论。

Abstract:: Magnesium alloys are widely used in automobile, rail transportation and aerospace industries due to their low density, high specific strength and high damping property, etc. However, it is inevitable that the traditional casting processes, especially conventional gravity casting and lowpressure casting magnesium alloys, always have casting defects. Squeeze casting, as a near-net forming process, has been demonstrated to be capable of minimizing the casting defects and improving mechanical properties, which is of great significance to the development and application of magnesium alloys. In this work, the characteristics and latest research progress in squeeze casting magnesium alloys are introduced and summarized, including alloying and process parameter optimization of squeeze casting magnesium alloys. The microstructure and mechanical properties of squeeze casting magnesium alloys are mainly described, which can be helpful for the composition design of squeeze casting magnesium alloys and the preparation of high performance magnesium alloys. At last, based on experiments and theories, the future research directions and challenges of squeeze casting magnesium alloys are discussed.