Method for preventing selective laser melting nickel-based superalloy from cracking

A nickel-based superalloy, selective laser melting technology, applied in the field of additive manufacturing, to achieve the effect of simple operation, reduced thermal gradient, and excellent mechanical properties

Active Publication Date: 2020-11-10
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, this method has not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Precipitation-strengthened René 104 nickel-based superalloy, in terms of mass percentage, includes the following components:

[0057] Co: 20.6wt%;

[0058] Cr: 13.0wt%;

[0059] Mo: 3.8wt%;

[0060] W: 2.1wt%;

[0061] Al: 3.4wt%;

[0062] Ti: 3.9wt%;

[0063] Ta: 2.4wt%;

[0064] Nb: 0.9wt%;

[0065] Zr: 0.05wt%;

[0066] B: 0.03wt%;

[0067] C: 0.04wt%;

[0068] Ni: margin;

[0069] The contents of Zr, B, Al, and Ti elements in the René 104 nickel-based superalloy are adjusted, and the obtained alloy composition is calculated by mass percentage, including the following components:

[0070] Co: 20.6wt%;

[0071] Cr: 13.0wt%;

[0072] Mo: 3.8wt%;

[0073] W: 2.1wt%;

[0074] Al: 2.0wt%;

[0075] Ti: 2.5wt%;

[0076] Ta: 2.4wt%;

[0077] Nb: 0.9wt%;

[0078] Zr: 0wt%;

[0079] B: 0.01wt%;

[0080] C: 0.04wt%;

[0081] Ni: margin;

[0082] The above-mentioned nickel-based superalloy powder is prepared by argon atomization method, and the nickel-b...

Embodiment 2

[0124] (1) Precipitation-strengthened Inconel738LC nickel-based superalloy, in terms of mass percentage, includes the following components:

[0125] Co: 8.5wt%;

[0126] Cr: 16wt%;

[0127] Mo: 1.75wt%;

[0128] W: 2.6wt%;

[0129] Al: 3.4wt%;

[0130] Ti: 3.4wt%;

[0131] Ta: 1.75wt%;

[0132] Nb: 0.9wt%;

[0133] Zr: 0.06wt%;

[0134] B: 0.01wt%;

[0135] C: 0.11wt%;

[0136] Ni: margin;

[0137] The content of Zr, B, Al, and Ti elements in the Inconel738LC nickel-based superalloy is adjusted, and the obtained alloy composition is calculated by mass percentage, including the following components:

[0138] Co: 8.5wt%;

[0139] Cr: 16wt%;

[0140] Mo: 1.75wt%;

[0141] W: 2.6wt%;

[0142] Al: 2.0wt%;

[0143] Ti: 2.5wt%;

[0144] Ta: 1.75wt%;

[0145] Nb: 0.9wt%;

[0146] Zr: 0wt%;

[0147] B: 0.01wt%;

[0148] C: 0.11wt%;

[0149] Ni: margin;

[0150] The above-mentioned nickel-based superalloy powder is prepared by argon atomization method, and the nickel...

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Abstract

The invention provides a method for preventing a selective laser melting nickel-based superalloy from cracking, and belongs to the field of additive manufacturing. According to the method, a workpiecewhich is high in density, free of crack defects and excellent in mechanical property is prepared by reducing low-melting-point phase forming elements Zr and B in the nickel-based superalloy and adjusting the total content of Al and Ti in the alloy to be smaller than or equal to 4.5wt% in combination with special selective laser melting (SLM) process parameter control. Through the method, component design is reasonable, the preparation process is simple, and the obtained workpiece has excellent properties and is convenient to apply on a large scale.

Description

technical field [0001] The invention provides a method for preventing cracking of a nickel-based superalloy in selective laser melting, and belongs to the field of additive manufacturing. [0002] technical background [0003] Nickel-based superalloys have high strength and good oxidation resistance, fatigue resistance, wear resistance and other properties at high temperatures, and are widely used in rocket engines, aeroengine turbine disk structural parts and other fields. With the continuous improvement of the extremely high propulsion ratio of the engine, the integrated design of the engine components poses a serious challenge to the traditional forming method. Selected laser melting (SLM) technology uses 3D computer-aided design data to directly melt metal powder with high-energy laser beams, and superimpose layer by layer to generate near-net-shape 3D parts. Chemical forming has unique advantages. [0004] Due to the fast cooling rate, repeated remelting, and large the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105C22C19/05C22C1/04B33Y10/00B33Y70/00
CPCC22C19/056C22C1/0433B33Y10/00B33Y70/00Y02P10/25B22F10/36B22F10/28B33Y50/02B22F10/366B22F9/082B22F2009/0824B22F2009/0844B22F2999/00B23K26/342B23K26/0006B22F2201/11B22F10/368B22F2301/15B23K26/32
Inventor 刘祖铭农必重魏冰任亚科周旭卢思哲曹镔艾永康
Owner CENT SOUTH UNIV
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