增材制造用金属粉末质量研究

增材制造作为21世纪新兴技术迅速发展,实现了各种材料的快速组建和个性化定制,并广泛应用于汽车、建筑、生物医疗等领域.本文针对金属增材制造粉末的研究现状,包括气雾化制备的粉末表面质量、粉末尺寸分布、粉末形状和最终粉末合金成分,对其展开论述.介绍了几种常见的金属增材制造技术的成形原理,如粉末床熔融(PBF)、定向能量沉积(...

Study on quality of metal powder for additive manufacturing

As an emerging technology in the 21st century, additive manufacturing (AM) has realized the rapid formation and personalized customization of various materials, which has been widely applied in the automotive, construction, biological medical fields. This paper discusses current research status of metal additive powder manufacturing, including the surface quality, powder size distribution, powder shape and final powder alloy composition. It begins with a introduction of forming principles of several common metal additive manufacturing technologies, e.g. powder bed fusion (PBF) and directed energy deposition (DED), and discusses the relationship between the pore defects and the powder quality during the forming process. Then it analyzes the causes of pores in the process of aerosolized powder making and presents availability of hot isostatic pressure (HIP) in eliminating pores. In general, the combination of high-throughput calculation and experiments are expected to improve the quality, accuracy and efficiency of aerosolized powders, and achieve sustainable manufacturing of advanced materials.