公开(公告)号：US20240335881A1

公开(公告)日：2024-10-10

申请号：US18239366

申请日：2022-05-25

Applicant: CASTHEON INC ,  Addman Intermediate Holdings, LLC

Inventor： Youping Gao

IPC: B22F10/60 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/00 ,  C22C1/04 ,  C23C24/08 ,  C23C28/02

CPC classification number: B22F10/60 ,  C22C1/045 ,  C23C24/08 ,  C23C28/021 ,  B22F2998/10 ,  B22F2999/00 ,  B33Y10/00 ,  B33Y40/20 ,  B33Y70/00

Abstract: A part made from a refractory alloy is manufactured using additive manufacturing or casting. The part is coated with a protective coating prior to the step of hot isostatic pressing the part.

公开(公告)号：US20240269745A1

公开(公告)日：2024-08-15

申请号：US18438949

申请日：2024-02-12

Applicant: Addman Intermediate Holdings, LLC

Inventor： Youping Gao

IPC: B22F10/28 ,  B22F1/14 ,  B22F10/50 ,  B33Y10/00 ,  B33Y80/00

CPC classification number: B22F10/28 ,  B22F1/14 ,  B22F10/50 ,  B22F2201/02 ,  B22F2201/03 ,  B22F2201/10 ,  B22F2301/20 ,  B22F2304/10 ,  B33Y10/00 ,  B33Y80/00

Abstract: Methods of fabricating objects using additive manufacturing are provided using pretreated powders. In a first aspect, the methods create in situ dispersoids within the object to increase the oxygen content to between 500 ppm and 3000 ppm or to increase the nitrogen content to between 250 ppm and 1500 ppm. The pretreated powders are then formed into layers in an environmentally controlled chamber of an additive manufacturing machine. The quantity of refractory alloy powder is partially pretreated by exposure to the atmosphere for a selected period of time or in an inert atmosphere having oxygen and/or nitrogen introduced thereinto. The partially pretreated quantity of powder is then further pretreated in an inert atmosphere controlled chamber to raise the oxygen and/or nitrogen level to between about 250 ppm and 1000 ppm for nitrogen and between about 500 ppm and 2000 ppm for oxygen. The layers of pretreated powder are then exposed to a transient moving energy source or stationary energy source for melting and solidifying the layers; and creating in situ dispersoids in the layers. In a second aspect, carbon dioxide is introduced into an inert atmosphere controlled chamber having hafnium powder therein for creating hafnium carbide dispersoids throughout the object.