公开(公告)号：US20250050410A1

公开(公告)日：2025-02-13

申请号：US18721650

申请日：2022-09-19

Applicant: EOS GMBH ELECTRO OPTICAL SYSTEMS

Inventor： Antti SEPPÄLÄ ,  Mika MALMIVIRTA

IPC: B22F1/00 ,  B22F10/28 ,  B22F10/64 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y40/20 ,  B33Y70/10 ,  B33Y80/00

Abstract: The present application is concerned with a powder mixture for additive manufacturing processes, wherein the powder mixture comprises a duplex steel powder component and an austenitic steel powder component, wherein the powder mixture comprises Cr in an amount of at least 21.3% by weight. The addition of the austenitic steel powder component increases the ductility of the duplex steel and reduces internal stresses which result in cracking in objects build with duplex steel. The present application is further concerned with methods for the preparation of such powder mixtures, methods and devices for the preparation of three-dimensional objects from the powder mixtures and three-dimensional objects, which have been prepared accordingly, as well as the use of an austenitic steel powder to suppress the formation of cracks in duplex steel three-dimensional objects.