公开(公告)号：US12186803B2

公开(公告)日：2025-01-07

申请号：US17685824

申请日：2022-03-03

Applicant: Northwestern Polytechnical University

Inventor： Haijun Su ,  Yong Zhao ,  Meng Wang ,  Jun Zhang ,  Min Guo ,  Lin Liu ,  Hengzhi Fu

IPC: B22F1/05 ,  B22F1/142 ,  B22F3/10 ,  B22F3/105 ,  B22F9/04 ,  C22C19/05

Abstract: Disclosed are a nickel-based superalloy formed by selective laser melting and a preparation method thereof. In the method, CrFeNb alloy powder is used as a grain refiner, and its element composition is within the composition range of a nickel-based superalloy powder to ensure that the prepared nickel-based superalloy has the same element composition with the original alloy; the grain size in the nickel-based superalloy could be refined by the addition of CrFeNb alloy powder, such that the anisotropic columnar grain structure in the alloy is transformed to equiaxed grain structure, thereby improving mechanical properties of the alloy.