公开(公告)号：US20250146113A1

公开(公告)日：2025-05-08

申请号：US18621532

申请日：2024-03-29

Applicant: Northwestern Polytechnical University

Inventor： Min Guo ,  Jia Chen ,  Jun Zhang ,  Min Yang ,  Yong Zhao

IPC: C22F1/10 ,  G01N27/411

Abstract: The present disclosure discloses a method and system for designing a solution heat-treatment process of a single-crystal superalloy, and relates to the field of numerical simulation-material processing crossover techniques. The method includes: determining a solidus temperature distribution of an as-cast single-crystal superalloy sample based on a relationship between an element concentration and a solidus temperature according to an element concentration distribution extracted from the as-cast single-crystal superalloy sample; subjecting the as-cast single-crystal superalloy sample to solution heat-treatment simulation by a phase-field method to obtain a post-treatment element concentration distribution after a simulation time step of heat preservation at an incipient melting temperature; determining a segregation coefficient of each element; when segregation coefficients of all elements are within a preset range, denoting all incipient melting temperatures and corresponding current simulation times as solution heat-treatment simulation results; and determining an actual solution heat-treatment process of the as-cast single-crystal superalloy sample.

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.