	US 12,214,422 B2
	Method for preventing cracking of nickel-based superalloy fabricated by selective laser melting
Zuming Liu, Changsha (CN); Bizhong Nong, Changsha (CN); Bing Wei, Changsha (CN); Yake Ren, Changsha (CN); Xu Zhou, Changsha (CN); Sizhe Lu, Changsha (CN); Bin Cao, Changsha (CN); and Yongkang Ai, Changsha (CN)
Assigned to CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Filed by CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Filed on Sep. 30, 2021, as Appl. No. 17/490,355.
Application 17/490,355 is a continuation of application No. PCT/CN2021/109546, filed on Jul. 30, 2021.
Claims priority of application No. 202010891107.5 (CN), filed on Aug. 30, 2020.
Prior Publication US 2022/0062995 A1, Mar. 3, 2022
Int. Cl. B22F 10/28 (2021.01); B22F 10/368 (2021.01); B23K 26/32 (2014.01); B23K 26/342 (2014.01); B33Y 10/00 (2015.01); B33Y 70/00 (2020.01); C22C 19/05 (2006.01)

CPC B22F 10/28 (2021.01) [B22F 10/368 (2021.01); B23K 26/32 (2013.01); B23K 26/342 (2015.10); B33Y 10/00 (2014.12); B33Y 70/00 (2014.12); C22C 19/056 (2013.01); B22F 2201/11 (2013.01); B22F 2301/15 (2013.01)]

7 Claims

1. A method for preventing cracking of a nickel-based superalloy fabricated by selective laser melting (SLM), comprising:

step 1: adjustment of alloy composition:

reducing a content of Zr to 0 wt % and a content of B to 0-0.02 wt % in the nickel-based superalloy, and adjusting a content of Al to 4.5 wt % or below and a content of Ti to 4.5 wt % or below in the nickel-based superalloy, to obtain a required nickel-based superalloy powder; and

step 2: SLM building:

preparing an as-built part under a protective atmosphere by an SLM building process using the required nickel-based superalloy powder as a raw material.