激光选区熔化镁合金研究进展

Research Progress of the Selective Laser Melted Magnesium Alloys

摘要:

镁合金是最轻的金属结构材料，以其优异的力学性能和生物相容性能在航空航天、生物医疗等领域具有极大的应用潜力。与镁合金的传统制造工艺相比，激光选区熔化（Selective Laser Melting, SLM）技术具有成形精度好、空间自由度高且加工周期短等优势，尤其是高性能复杂结构的镁合金构件的制造，因此拓宽了镁合金的应用前景。综述了激光选区熔化工艺参数对镁合金成形质量、组织、性能等方面的影响，并讨论了技术难题，最后展望了激光选区熔化成形镁合金的未来发展趋势。

Abstract:

As the lightest metal structural material， magnesium alloy， has great potential applications in the fields of aerospace， and bio-medicine for its excellent mechanical properties and biocompatibility. Compared with the traditional manufacturing methods of magnesium alloy， Selective laser melting （SLM） technology presents enormous advantages， such as high processing precision， high spatial freedom and short processing cycle， in the preparation of magnesium alloy components with complicated structures. This paper reviewed the effects of SLM processing parameters on the forming quality， densification， microstructure， mechanical properties and corrosion resistance of the magnesium alloys， and then analyzed the technical problem. The future development trends of SLM of magnesium alloy parts were at last prospected.