Patent ID: 11919075
Assignee: SANGKYU LEE
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C  Y | IPC B

Claim 0:
1. A method for producing an oxide-dispersed strengthened alloy using organic-inorganic kneaded composition, the method comprising:
a feedstock preparing step of preparing the organic-inorganic kneaded composition prepared by kneading, pulverizing and granulating oxide-dispersion strengthening (ODS) mixed powders and a polymeric binder;
a molding step of forming a semi-finished product having a predetermined shape using the organic-inorganic kneaded composition, the molding step being performed using a metal injection molding unit and including:
a feedstock supply step of supplying the organic-inorganic kneaded composition to the metal injection molding unit; and
a semi-finished product molding step of injection-forming the semi-finished product using the metal injection molding unit;

a debinding step of removing the polymeric binder from the semi-finished product molded in the molding step; and
a sintering step of extracting a final product having a predetermined shape by sintering and cooling the semi-finished product in which the polymeric binder has been removed in the debinding step,
wherein the ODS mixed powders are prepared by mixing metal powders and metal oxides,
wherein the sintering step includes:
a general sintering step of performing sintering at a sintering temperature after raising the sintering temperature to a temperature range of 1250° C. to 1325° C. or less in a vacuum atmosphere; and
a hot isostatic pressure sintering step of performing sintering in a sintering temperature lower than the sintering temperature of the general sintering step in an isostatic pressure atmosphere, and

wherein the ODS mixed powders include the metal oxides which are one or more of yttria (Y2O3), thorium oxide (ThO2), lanthanum oxide (La2O3), and scandium oxide (Sc2O3).