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A kind of high-performance compacted ink high-entropy alloy and preparation method thereof

A high-entropy alloy, high-performance technology, applied in the field of metallurgy, can solve the problems of poor comprehensive performance of vermicular graphite cast iron, and achieve the effect of high hardness, excellent comprehensive performance and high wear resistance

Active Publication Date: 2018-08-03
XIAN TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of the current poor comprehensive performance of vermicular graphite cast iron, the present invention provides a high-performance vermicular graphite high-entropy alloy and its preparation method, which combines the excellent properties of vermicular graphite cast iron and high-entropy alloy, and has high strength and high hardness And excellent comprehensive performance of wear resistance

Method used

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  • A kind of high-performance compacted ink high-entropy alloy and preparation method thereof
  • A kind of high-performance compacted ink high-entropy alloy and preparation method thereof
  • A kind of high-performance compacted ink high-entropy alloy and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment is an AlCoFeNiC 0.1 Vermicular ink high entropy alloy.

[0026] The AlCoFeNiC 0.1 The preparation method of vermicular ink high entropy alloy is:

[0027] Step 1: Ingredients. Use Al, Co, Fe, Ni and Fe-C alloys with a purity of not less than 99.9wt.%, remove the scale on the surface by mechanical means, and use industrial absolute alcohol to ultrasonically clean the metal. According to the experiment, the purity is not less than 99.9wt. .% of pure metal or alloy. Prepare a total of 130.00 g of the mixture according to the proportion of ingredients.

[0028] Step Two: Vacuum. Place the weighed material in a water-cooled copper crucible that has been cleaned in advance, and vacuumize the electric arc furnace to 3.0×10 -3 Pa, filled with high-purity argon with a protective gas purity of 99.99wt.%, so that the pressure in the furnace is -0.5Pa (shown by the barometer).

[0029] The third step: melting. Melting is carried out in a vacuum copper crucib...

Embodiment 2

[0033] This embodiment is an AlCoFeNiC0.15 Vermicular ink high entropy alloy.

[0034] The AlCoFeNiC 0.15 The preparation method of vermicular ink high entropy alloy is:

[0035] Step 1: Ingredients. In the experiment, Al, Co, Fe, Ni and Fe-C alloys with a purity of not less than 99.9wt.% were used to remove the oxide skin on the surface by mechanical means, and the metal was ultrasonically cleaned with industrial absolute ethanol. Pure metals or alloys with a purity not lower than 99.9 wt.% are used according to the experiment. Prepare a total of 130.00 g of the mixture according to the proportion of ingredients.

[0036] Step Two: Vacuum. Place the weighed material in a water-cooled copper crucible that has been cleaned in advance, and vacuumize the electric arc furnace to 3.0×10 -3 Pa, filled with high-purity argon with a protective gas purity of 99.99wt.%, so that the pressure in the furnace is -0.5Pa (shown by the barometer).

[0037] The third step: melting. Melti...

Embodiment 3

[0041] This embodiment is an AlCoFeNiC 0.2 Vermicular ink high entropy alloy.

[0042] The AlCoFeNiC 0.2 The preparation method of vermicular ink high entropy alloy is:

[0043] Step 1: Ingredients. In the experiment, Al, Co, Fe, Ni and Fe-C alloys with a purity of not less than 99.9wt.% were used to remove the oxide skin on the surface by mechanical means, and the metal was ultrasonically cleaned with industrial absolute ethanol. Pure metals or alloys with a purity not lower than 99.9 wt.% are used according to the experiment. Prepare a total of 130.00 g of the mixture according to the proportion of ingredients.

[0044] Step Two: Vacuum. Place the weighed material in a water-cooled copper crucible that has been cleaned in advance, and vacuumize the electric arc furnace to 3.0×10 -3 Pa, filled with high-purity argon with a protective gas purity of 99.99wt.%, so that the pressure in the furnace is -0.5Pa (shown by the barometer).

[0045] The third step: melting. Melti...

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Abstract

The invention discloses a high-performance vermicular graphite high-entropy alloy and a preparation method thereof. The excellent performance of vermicular graphite cast iron and a high-entropy alloy is combined, and excellent comprehensive performance is achieved. Compared with an FCC phase, a BCC or B2 phase in the vermicular graphite high-entropy alloy has high strength and hardness, and graphite is distributed in the interdendritic FCC phase; and meanwhile, the graphite has lubricity, vermicular graphite exists in the vermicular graphite high-entropy alloy, and the excellent comprehensive performance is achieved, that is, good compression plasticity, strength and wear resistance are achieved. Room-temperature compressive strength is larger than 2 GPa, the compression ratio is larger than 30%, the hardness value is larger than 350 HB, and the wear size is smaller than 0.04 mm<3>.

Description

1. Technical field [0001] The invention relates to the technical field of metallurgy, in particular to a high-performance vermicular ink high-entropy alloy and a preparation method thereof. 2. Background technology: [0002] Vermicular graphite cast iron appeared in the 1960s as a new type of cast iron material. It has thermal conductivity, wear resistance and thermal fatigue resistance, and is widely used in hydraulic parts, exhaust pipes, brake discs and engines. However, vermicular cast iron needs to be added with a vermicular agent for vermicular treatment, and it is easy to form white cast iron, which needs to be returned to the furnace for resmelting. Vermicular graphite cast iron has high carbon content, vermicular graphite is easy to precipitate, the plasticity of the alloy material is reduced, and the brittleness is increased. Compacted graphite iron has relatively poor compressive strength and compressibility. In addition, with the development of large machines a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C30/02C22C30/06C22C1/03
CPCC22C1/03C22C30/00C22C30/02C22C30/06
Inventor 周学阳陈建邵华吕煜坤范新会
Owner XIAN TECH UNIV