公开(公告)号：US20180333775A1

公开(公告)日：2018-11-22

申请号：US15545995

申请日：2016-12-26

Applicant: Technology Research Association For Future Additive Manufacturing

Inventor： Motonori NISHIDA ,  Yuji SUGITANI ,  Akihiko CHIBA ,  Youhei DAINO

IPC: B22F1/02 ,  B22F1/00 ,  B33Y70/00

CPC classification number: B22F1/025 ,  B22F1/00 ,  B22F1/0011 ,  B22F1/02 ,  B22F3/105 ,  B22F3/1055 ,  B22F3/16 ,  B22F2301/15 ,  B22F2304/10 ,  B33Y70/00

Abstract: The present invention relates to a metal powder which shortens a lamination-shaping time and facilitates the removal of an unnecessary powder after lamination-shaping by decreasing a pre-sintering temperature by using a processed metal powder. This metal powder for lamination-shaping is obtained by coating the surface of a powder of a nickel-based alloy with a conductive material. When the powder is the powder of the nickel-based alloy containing nickel as a main component and chromium and iron as primary subcomponents, the powder is coated, e.g., plated with nickel as the conductive material. The particle diameter range of the powder of the nickel-based alloy is 10 to 200 μm, preferably 25 to 150 μm, and more preferably 45 to 105 μm. The thickness range of the conductive material is 0.1 to 1 μm, and preferably 0.3 μm or more.

公开(公告)号：US20210346954A1

公开(公告)日：2021-11-11

申请号：US17278121

申请日：2019-03-14

Applicant: TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING

Inventor： Akihiko CHIBA ,  Takahiro KUDO ,  Youhei DAINO ,  Kenta AOYAGI

IPC: B22F9/04 ,  B22F9/08 ,  B22F10/28 ,  B33Y80/00 ,  B33Y70/00

Abstract: This invention provides, by simple mechanical treatment, a metal powder that generates no smoke phenomenon when laminating and shaping a metal object even when decreasing a preheating temperature. In the metal powder, a solidification structure including a dendritic structure on the surface of the metal powder has been flattened. The solidification structure including the dendritic structure has been flattened by mechanical treatment including collision treatment of the metal powder. The mechanical treatment is performed by heating the metal powder to 100° C. to 300° C. The metal powder is a metal powder that is heated to a predetermined temperature and whose capacitance component of a measured impedance becomes zero. This metal powder is a powder of a metal alloy produced by an atomization process or a plasma rotation electrode process. The metal alloy includes a nickel-based alloy, a cobalt-chrome alloy, an iron-based alloy, an aluminum alloy, and a titanium alloy.