US 12,214,422 B2 · Method for preventing cracking of nickel-based superalloy fabricated by selective laser melting

Abstract

A method for preventing cracking of nickel-based superalloy fabricated by selective laser melting (SLM) belongs to the field of additive manufacturing (AM). The method of preparing an as-built part with a high density, no crack defects, and good mechanical properties includes: reducing the content of elements Zr and B forming low melting point phase in a nickel-based superalloy, adjusting the total content of Al and Ti in the alloy to 4.5 wt % or below, and combining with the control of special SLM process parameters. The new method has the advantages of a reasonable component design, a simple preparation process, and good performance of the as-built part, and therefore is suitable for large-scale application.

Claims7

Dependent claims

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.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/490,355Filed 30 Sep 2021 · continuation

Priority

CN 202010891107.530 Aug 2020

Published

US 2022/0062995 A13 Mar 2022

Granted

4 Feb 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification23 codes

B22F 10/28
Direct sintering or melting: powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
B22F 9/082
By casting, e.g. through sieves or in water, by atomising or spraying: atomising using a fluid
B22F 10/368
Of energy beam parameters: temperature or temperature gradient, e.g. temperature of the melt pool
B23K 26/0006
Working by laser beam, e.g. welding, cutting or boring: taking account of the properties of the material involved

Method for preventing cracking of nickel-based superalloy fabricated by selective laser melting

Life of this patent

Method for preventing cracking of nickel-based superalloy fabricated by selective laser melting

Life of this patent

Abstract

Claims7