US 12,330,215 B2
Alloy member production method and alloy member
Kousuke Kuwabara, Tokyo (JP)
Assigned to PROTERIAL, LTD., Tokyo (JP)
Appl. No. 17/639,747
Filed by Proterial, Ltd., Tokyo (JP)
PCT Filed Sep. 2, 2020, PCT No. PCT/JP2020/033200
§ 371(c)(1), (2) Date Mar. 2, 2022,
PCT Pub. No. WO2021/054119, PCT Pub. Date Mar. 25, 2021.
Claims priority of application No. 2019-171636 (JP), filed on Sep. 20, 2019.
Prior Publication US 2022/0331870 A1, Oct. 20, 2022
Int. Cl. B22F 10/28 (2021.01); B22F 1/00 (2022.01); B22F 9/08 (2006.01); B22F 10/64 (2021.01); B33Y 70/00 (2020.01); C21D 9/00 (2006.01); C22F 1/10 (2006.01); B33Y 10/00 (2015.01); B33Y 80/00 (2015.01)
CPC B22F 10/28 (2021.01) [B22F 1/00 (2013.01); B22F 9/08 (2013.01); B22F 10/64 (2021.01); B33Y 70/00 (2014.12); C21D 9/0068 (2013.01); C22F 1/10 (2013.01); B22F 2301/15 (2013.01); B33Y 10/00 (2014.12); B33Y 80/00 (2014.12)] 9 Claims
OG exemplary drawing
 
1. A method for producing an alloy member, the method comprising the steps of:
an additive manufacturing step to form products by additive manufacturing using an alloy powder including each of cobalt (Co), chromium (Cr), iron (Fe), nickel (Ni), and titanium (Ti) in a range between 5 at % and 35 at %, Mo in a range of greater than 0 at % and 8 at % or less, and unavoidable impurities for a remainder;
a heat treatment step to raise a temperature of the products through heating, and holding the products at a holding temperature between 1080° C. and 1180° C.; and
a forced cooling step to cool the products after the heat treatment in a temperature range from the holding temperature to 800° C. at a cooling rate from 110° C./min to less than 600° C./min, wherein the forced cooling step uses at least one of inert gases of nitrogen, argon, or helium, which are at atmospheric pressure or higher.