3D Heat treatment method for improving mechanical property of metal product manufactured by 3D printing

摘要

The present invention provides a method of heat treating a metal molding product comprising a step of performing a phase transformation heat treatment at least once on a metal molding product formed by molding a metal material having a phase transition temperature by a 3D printing method. In the case of using the heat treatment method of the metal forming product according to the present invention, the metal microstructure in the 3D printing lamination direction of the metal forming product produced by 3D printing is changed from a rough elongating lip to a minute equiaxed lip due to a phase transformation, , So that the mechanical properties of the metal moldings become isotropy, and the mechanical properties such as tensile strength, hardness and the like of the metal moldings are greatly improved.