A kind of preparation method of carbon-containing high-entropy alloy composite material

A high-entropy alloy and composite material technology, applied in additive manufacturing, additive processing, energy efficiency improvement and other directions, can solve problems such as reducing product accuracy, weakening the significance of selective laser melting engineering, increasing industrial energy consumption, etc., to improve strength , without loss of plasticity, the effect of fast forming speed

Active Publication Date: 2020-02-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of using hot isostatic pressing to improve sample performance increases industrial energy consumption, reduces product accuracy, and weakens the engineering significance of selective laser melting

Method used

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  • A kind of preparation method of carbon-containing high-entropy alloy composite material
  • A kind of preparation method of carbon-containing high-entropy alloy composite material
  • A kind of preparation method of carbon-containing high-entropy alloy composite material

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Embodiment 1

[0040] The invention provides a method for preparing a carbon-containing high-entropy alloy composite material, comprising the following steps:

[0041] (1) Fe, Co, Cr, Ni metal elements and chromium carbide are selected as raw materials, the atomic ratio of Fe, Cr, Ni, Co, and C in the composite material is 1:1:1:1:0.05, and the gas atomization method is used Preparation of high-entropy pre-alloyed powder; wherein, the alloying element powder does not contain other impurities except a small amount of unavoidable impurity oxygen, and the raw material does not contain other elemental components except Fe, Co, Cr, Ni, C; high-entropy pre-alloyed The particle size of the alloy powder ranges from 15 to 55 μm, and the D50 is controlled at 45 μm;

[0042] (2) Establish a three-dimensional model of the part on the computer, plan the scanning path of the component, and scan using a checkerboard pattern layer by layer; when scanning layer by layer, the deflection angle is 65°;

[0043...

Embodiment 2

[0051] The invention provides a method for preparing a carbon-containing high-entropy alloy composite material, comprising the following steps:

[0052] (1) Fe, Co, Cr, Ni metal elements and chromium carbide are selected as raw materials, and the atomic ratio of Fe, Cr, Ni, Co, and C in the composite material is 1:1:1:1:0.1, and the gas atomization method is used Preparation of high-entropy pre-alloyed powder; wherein, the alloying element powder does not contain other impurities except a small amount of unavoidable impurity oxygen, and the raw material does not contain other elemental components except Fe, Co, Cr, Ni, C; high-entropy pre-alloyed The particle size of alloy powder ranges from 15 to 45 μm, of which d50 is controlled at 40 μm;

[0053] (2) Establish a three-dimensional model of the part on the computer, plan the scanning path of the component, and scan using a checkerboard pattern layer by layer; when scanning layer by layer, the deflection angle is 70°;

[0054...

Embodiment 3

[0061] The invention provides a method for preparing a carbon-containing high-entropy alloy composite material, comprising the following steps:

[0062] (1) Fe, Co, Cr, Ni, Mn metal elements and chromium carbide are selected as raw materials, and the atomic ratio of Fe, Cr, Ni, Co, Mn, and C in the composite material is 1:1:1:1:1:0.07 , using the gas atomization method to prepare high-entropy pre-alloyed powder; wherein, the alloying element powder does not contain other impurities except a small amount of unavoidable impurity oxygen, and the raw material does not contain other than Fe, Co, Cr, Ni, Mn, C Other elemental components; high-entropy pre-alloyed powder powder particle size range 15 ~ 45μm, of which d50 is controlled at 35μm;

[0063] (2) Establish a three-dimensional model of the part on the computer, plan the scanning path of the component, and scan using a checkerboard pattern layer by layer; when scanning layer by layer, the deflection angle is 63°;

[0064] (3)...

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Abstract

The invention discloses a method for preparing a carbon-containing high-entropy alloy composite material, comprising the following steps: (1) preparing high-entropy pre-alloyed powder; the high-entropy pre-alloyed powder is composed of at least It is composed of four metal elements and C element; (2) The high-entropy pre-alloying powder is subjected to selective laser melting and forming, and the formed parts are subjected to subsequent heat treatment to obtain a carbon-containing high-entropy alloy. The present invention adopts FeCoCrNi and other high-entropy alloys with excellent plasticity as the matrix, which can ensure that it still has good plasticity after selective laser melting; at the same time, the interstitial element C is introduced to significantly improve the yield strength and ultimate strength of the matrix through solid solution strengthening. ; The supercooling degree in the selective laser melting process is very high, the interstitial element C is uniformly dissolved in the matrix, and there is no coarse carbide segregation and precipitation, thus ensuring the plasticity of the material. In the process of the preparation method of the present invention, a high-density (>99%) product is obtained by means of selective laser melting.

Description

technical field [0001] The invention belongs to the field of alloys, and in particular relates to a method for preparing a carbon-containing high-entropy alloy composite material by adopting laser selective melting technology. Background technique [0002] High-entropy alloys refer to alloys in which at least quaternary and above transition alloy elements are combined in an equimolar or nearly equimolar ratio. Although the composition of high-entropy alloys is relatively complex, a single-phase supersaturated solid solution can be formed. High entropy alloys have good mechanical properties, corrosion resistance and oxidation resistance. [0003] Adding interstitial carbon elements to high-entropy alloys is a good way to strengthen high-entropy alloys. At present, high-entropy alloys are mainly prepared by vacuum arc melting and other methods. However, the cooling rate of smelting itself is low, and the coarse hard carbides in the carbon-containing high-entropy alloy are e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/105C22C30/00B33Y10/00
CPCC22C30/00B33Y10/00B22F10/00B22F10/32B22F10/36B22F10/64B22F10/366B22F10/28Y02P10/25
Inventor 刘咏周睿刘彬
Owner CENT SOUTH UNIV
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