激光粉末床熔融增材制造耐热铝合金的研究进展

Recent Progress in Heat-resistant Aluminum Alloy Fabricated by Laser Powder Bed Fusion Additive Manufacturing

随着航空航天工业的快速发展,人们对高性能耐热铝合金的需求逐渐增加。为了实现复杂构件的一体化成型,激光粉末床熔融(Laser powder bed fusion,L-PBF)增材制造技术成为目前的研究热点。相比传统铸造成型,采用激光粉末床熔融增材制造的构件具有更优异的综合性能。目前,对L-PBF增材制造传统高强韧铝合金已开展较为深入的研究,而针对耐热铝合金的研究还处于起步阶段。本综述首先介绍了激光粉末床熔融增材制造技术的特点,随后总结了近年来针对耐热铝合金体系及相应高温性能的研究,对目前存在的问题与难点进行了概括,最后对未来的主要研究方向进行了展望。

With the rapid development of the aerospace industry,the demand for high-performance heat-resistant aluminum alloys will continue to increase in the future.In order to realize the one-step molding of complex components,laser powder bed fusion(L-PBF)additive manufacturing technology has become a hot research topic.The building parts manufactured by L-PBF additive manufacturing have a better overall performance than conventional casting manufacturing.At present,the researches on room-temperature high strength-ductility aluminum alloys are relatively comprehensive,but the researches on heat-resistant aluminum alloys are still in the initial stage.This review firstly introduces the L-PBF additive manufacturing technology,then summarizes the research on heat-resistant aluminum alloy systems and corresponding high-temperature properties in recent years,presents a brief overview of the current problems and challenges,finally looks forward to the main research interests in the future.