Preparation method of carbon-containing high-entropy alloy composite material

A technology of high-entropy alloys and composite materials, which can be used in additive manufacturing, additive processing, and energy efficiency improvement. , The molding speed is fast, and the effect of no loss of plasticity

Active Publication Date: 2018-06-29
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process of using hot isostatic pressing to improve sample performance increases industrial ener

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  • Preparation method of carbon-containing high-entropy alloy composite material
  • Preparation method of carbon-containing high-entropy alloy composite material
  • 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, which includes the following steps:

[0041] (1) Select Fe, Co, Cr, Ni metal element and chromium carbide as raw materials, the atomic ratio of Fe, Cr, Ni, Co, C in the composite material is 1:1:1:1:1:0.05, adopting gas atomization method Preparation of high-entropy pre-alloyed powder; among them, the alloying element powder does not contain other impurities except a small amount of inevitable impurity oxygen element, and the raw materials do not contain other elements except Fe, Co, Cr, Ni, C; high-entropy pre-alloyed powder The particle size range of alloy powder is 15~55μm, and D50 is controlled at 45μm;

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

[0043] (3) Molding using selective las...

Embodiment 2

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

[0052] (1) Fe, Co, Cr, Ni and chromium carbide are selected as raw materials. The atomic ratio of Fe, Cr, Ni, Co, and C in the composite material is 1:1:1:1:1:0.1, and the gas atomization method is adopted. Preparation of high-entropy pre-alloyed powder; among them, the alloying element powder does not contain other impurities except a small amount of inevitable impurity oxygen element, and the raw materials do not contain other elements except Fe, Co, Cr, Ni, C; high-entropy pre-alloyed powder The particle size range of alloy powder is 15~45μm, and d50 is controlled at 40μm;

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

[0054] (3) The selected area ...

Embodiment 3

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

[0062] (1) Fe, Co, Cr, Ni, Mn and chromium carbide are selected as raw materials. The atomic ratio of Fe, Cr, Ni, Co, Mn and C in the composite material is 1:1:1:1:1:1:1:0.07 , Adopt gas atomization method to prepare high-entropy pre-alloyed powder; among them, the alloying element powder does not contain other impurities except a small amount of unavoidable impurity oxygen element, and the raw materials do not contain other than Fe, Co, Cr, Ni, Mn, C The other element composition of the high-entropy pre-alloyed powder powder has a particle size range of 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 use a checkerboard pattern to scan layer by layer; when scanning layer by layer, the deflection angle is 63°;

[0064]...

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Abstract

The invention discloses a preparation method of a carbon-containing high-entropy alloy composite material. The method comprises the steps of (1) preparing high-entropy pre-alloyed powder, wherein thehigh-entropy pre-alloyed powder comprises at least four of metal elements of Fe, Co, Cr, Ni and Ni, and a C element; and (2) performing selective laser melting molding on the high-entropy pre-alloyedpowder; and performing following thermal treatment on the molded part to obtain the carbon-containing high-entropy alloy. According to the method, high-entropy alloys with outstanding plasticity, suchas Fe, Co, Cr and Ni, are used for preparing a substrate, so that the high plasticity remains after the selective laser melting molding; and meanwhile, an interstitial element C is introduced and issubjected to solid solution reinforcing, so that the yield intensity and the ultimate strength of the substrate can be obviously improved; the supercooling degree in the selective laser melting process is high, the interstitial element C can be uniformly dissolved into the substrate in a solid solution manner, and coarse and big carbide are not segregated and separated out, so that the plasticityof the material is ensured; a high-density (more than 99%) product is prepared through the selective laser melting mode.

Description

Technical field [0001] The invention belongs to the field of alloys, and particularly relates to a method for preparing a carbon-containing high-entropy alloy composite material by adopting a 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 equimolar or close to equimolar ratios. Although the composition of high-entropy alloys is more complex, it can form a single-phase supersaturated solid solution. High-entropy alloys have good mechanical properties, corrosion resistance and oxidation resistance. [0003] Adding interstitial carbon 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 easy to segregate at the...

Claims

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Application Information

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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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