公开(公告)号：US20230143183A1

公开(公告)日：2023-05-11

申请号：US17913058

申请日：2021-03-22

Applicant: TOYO ALUMINIUM KABUSHIKI KAISHA ,  TOHOKU UNIVERSITY ,  TECHNOLOGY RESEARCH ASSOCIATION FOR FUTURE ADDITIVE MANUFACTURING

Inventor： Yoshiki HASHIZUME ,  Isao MURAKAMI ,  Kenta ISHIGAMI ,  Sotaro AKIYAMA ,  Akihiko CHIBA ,  Kenta AOYAGI

IPC: B22F1/12 ,  B33Y10/00 ,  B33Y80/00 ,  B22F10/38

CPC classification number: B22F1/12 ,  B33Y10/00 ,  B33Y80/00 ,  B22F10/38 ,  B22F2301/052 ,  B22F2302/05

Abstract: An object of the present invention is to provide an additive manufactured object which is free of solidification cracking due to, e.g., heat shrinkage during additive manufacturing of an aluminum alloy; which is free of anisotropy in strength, and has high strength and ductility. An aluminum alloy powder for additive manufacturing includes aluminum alloy particles in which not less than 0.01% by mass and not more than 1% by mass of a grain refiner is trapped. This grain refiner is at least one selected from the borides and carbides of group 4 elements.

公开(公告)号：US20180339343A1

公开(公告)日：2018-11-29

申请号：US15545989

申请日：2016-12-26

Applicant: Technology Research Association For Future Additive Manufacturing

Inventor： Yoshiki HASHIZUME ,  Isao MURAKAMI ,  Kenji MURAMATSU ,  Kenta ISHIGAMI

IPC: B22F3/12 ,  B29C64/153

Abstract: The present invention provides a robust metal lamination-shaped object containing aluminum and having no defect. A metal powder used for forming this metal lamination-shaped object is an aluminum-based powder having a volume-based 50% particle diameter larger than or equal to 10 μm and smaller than 100 μm when a particle diameter distribution is measured by a laser diffraction-scattering method, a specific surface area smaller than or equal to 0.5 m2/g, and an oxygen amount larger than or equal to 30 mg/m2 and less than or equal to 100 mg/m2 per unit surface area. A relationship between a hydrogen amount (X ml in standard state) per 100 g of the aluminum-based powder and a specific surface area (Y m2/g), and a relationship between the hydrogen amount (X ml in standard state) and an oxygen amount (Z wt %), are respectively in accordance with formulas: X/Y 0.0022. A metal lamination-shaped object, that is lamination-shaped by a three-dimensional lamination-shaping apparatus in a powder bed fusion type using the above metal powder, has a hydrogen amount less than or equal to 3 ml in standard state per 100 g, and a relative density more than or equal to 99%.