	US 12,084,752 B2
	Stainless steel powders for additive manufacturing
Abhinav Saboo, Evanston, IL (US); Ricardo Komai, Evanston, IL (US); Dana Frankel, Evanston, IL (US); Marie Thomas, Evanston, IL (US); and Greg Olson, Evanston, IL (US)
Assigned to QUESTEK INNOVATIONS LLC, Evanston, IL (US)
Filed by QUESTEK INNOVATIONS LLC, Evanston, IL (US)
Filed on Oct. 31, 2022, as Appl. No. 17/977,622.
Claims priority of provisional application 63/274,141, filed on Nov. 1, 2021.
Prior Publication US 2023/0134452 A1, May 4, 2023
Int. Cl. C22C 38/50 (2006.01); B33Y 70/00 (2020.01); C22C 38/00 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); B33Y 10/00 (2015.01)

CPC C22C 38/50 (2013.01) [B33Y 70/00 (2014.12); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/48 (2013.01); B22F 2201/11 (2013.01); B22F 2301/35 (2013.01); B33Y 10/00 (2014.12)]

12 Claims

1. An atomized alloy powder usable in additive manufacturing, the atomized alloy powder comprising:

alloy particles comprising, by weight percentage:

13.25% to 14.75% chromium;

4.5% to 5.5% nickel;

0.11% to 0.17% carbon;

0.01% to 0.31% titanium;

no more than 0.01% copper;

no more than 0.01% manganese;

no more than 0.02% nitrogen;

no more than 0.04% oxygen;

no more than 0.01% sulfur; and

wherein the alloyed particles have a ratio of chromium to nickel, by weight, between 2.4 and 3.3,

the balance of weight percent comprising iron and incidental elements and impurities, and

having a microstructure that is less than 30% δ-ferrite and γ-austenite and is greater than 70% martensite.