US 12,134,128 B2
Method for preparing nano spherical oxide dispersion strengthening phase
Zuming Liu, Changsha (CN); Sizhe Lu, Changsha (CN); Quan Li, Changsha (CN); Bing Wei, Changsha (CN); Xu Zhou, Changsha (CN); Bizhong Nong, Changsha (CN); Yake Ren, Changsha (CN); Yongkang Ai, Changsha (CN); and Bin Cao, Changsha (CN)
Assigned to CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Filed by CENTRAL SOUTH UNIVERSITY, Changsha (CN)
Filed on Nov. 22, 2021, as Appl. No. 17/533,074.
Application 17/533,074 is a continuation of application No. PCT/CN2021/087171, filed on Apr. 14, 2021.
Claims priority of application No. 202011097004.8 (CN), filed on Oct. 14, 2020.
Prior Publication US 2022/0111437 A1, Apr. 14, 2022
Int. Cl. B22F 9/04 (2006.01); B22F 1/0545 (2022.01); B22F 1/065 (2022.01); B22F 1/142 (2022.01); B22F 1/145 (2022.01); B22F 3/15 (2006.01); B22F 3/18 (2006.01); B22F 3/24 (2006.01); C22C 32/00 (2006.01)
CPC B22F 1/0545 (2022.01) [B22F 1/065 (2022.01); B22F 1/142 (2022.01); B22F 1/147 (2022.01); B22F 9/04 (2013.01); C22C 32/0026 (2013.01); B22F 3/15 (2013.01); B22F 3/18 (2013.01); B22F 2003/185 (2013.01); B22F 3/24 (2013.01); B22F 2003/248 (2013.01); B22F 2009/043 (2013.01); B22F 2302/25 (2013.01); B22F 2304/10 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for preparing a nano spherical oxide dispersion strengthening phase, comprising: mixing a micron oxide with a matrix alloy powder, and preparing a composite powder with a uniformly distributed amorphous nano oxide by a mechanical ball milling in a plurality of stages; in a first stage of the plurality of stages, mixing and ball milling the micron oxide with a part of the matrix alloy powder to prepare the composite powder with a completely amorphous structure nano oxide particles uniformly distributed in the matrix alloy powder; in a second stage of the plurality of stages, uniformly mixing the composite powder obtained in the first stage with a remaining part of the matrix alloy powder by the mechanical ball milling; and subjecting the composite powder obtained in the second stage to a hot forming, a hot rolling, and a heat treatment, to prepare the nano spherical oxide dispersion strengthening phase.