Analysis of Rheological Properties of Selective Laser Melting 17-4PH Powder

Abstract

In the selective laser melting process, high mechanical stability, excellent thermal performance and rheological property are required for printable materials, and due to the change of environmental conditions such as external force and temperature rise during the forming process and the using process of the forming part, The multi-phase structure of the material is changed, so that the mechanical property of the material is changed, and the change of the forming part is mainly manifested in the change of the rheological property. The rheological property of the 17-4PH powder material was studied to ensure the mechanical properties of the material after laser sintering. The results show that the viscosity of the 17-4PH powder material decreases with the increase of the shear rate, has good flow formability during the subsequent selective laser sintering process, And the forming part can meet the mechanical property requirement in the actual production and processing use. Keywords-3D Printing; Selective Laser Melting; Metal Rheology; Viscosity; Mechanical Properties