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a l1 2 Precipitation-strengthened high-entropy alloy and preparation method thereof

A high-entropy alloy and precipitation strengthening technology, applied to high-strength and wear-resistant parts, L12 type precipitation-strengthening high-entropy alloy and its preparation field, can solve the problems of high brittleness, influence of final alloy properties, difficult control of particle shape and size, etc.

Active Publication Date: 2022-02-08
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the particle shape and size of the coating obtained by this technology are not easy to control, so the properties of the final alloy are affected
Secondly, although the addition of the ceramic phase can promote the formation of the NiAl phase, which improves the hardness and wear resistance, its brittleness is also relatively large, and there is no relevant compression or tensile test to prove that the brittleness of the alloy product is improved.

Method used

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  • a l1 <sub>2</sub> Precipitation-strengthened high-entropy alloy and preparation method thereof
  • a l1 <sub>2</sub> Precipitation-strengthened high-entropy alloy and preparation method thereof
  • a l1 <sub>2</sub> Precipitation-strengthened high-entropy alloy and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] 1) Raw material preparation:

[0033] Al, Co, Cr, Fe, Ni feedstock of purity above 99.9% is mole than AlcoCrfeni (TiN) in accordance with alloy ingredients 0.2 Formulated, the quality required to convert the alloy ingot, using electronic balance accurately, pretreatment of each group of raw materials before smelting; pretreatment is to remove the oxide treatment for each group of raw materials, and then in ultrasonic cleaning instrument Perform ultrasound cleaning treatment, and finally naturally dried.

[0034] 2) Equipment cleaning:

[0035] Wipe the vacuum electric arc furnace using a gauze dipped in anhydrous ethanol, a fine sandpaper is used to polish tungsten poles until the tungsten pointer occurs and the surface is smooth, and the spare group of raw materials is placed in the sample tank in the arc furnace. In the order of the melting point from the low to high, it is sequentially placed in the sample tank in the furnace, and there is a titanium ingot of the sample ...

Embodiment 2

[0039] Al, Co, Cr, Fe, Ni, Tin feedstock of purity above 99.9% is mole than AlcoCrfeni (TiN) in accordance with alloy components 0.4 Formulated, the quality required to convert the alloy ingot, using electronic balance accurately, pretreatment of each group of raw materials before smelting; pretreatment is to remove the oxide treatment for each group of raw materials, and then in ultrasonic cleaning instrument Ultrasound cleaning treatment, finally naturally dried, and then step in the first embodiment.

Embodiment 3

[0041] Al, Co, Cr, Fe, Ni, Tin feedstock of purity above 99.9% is mole than AlcoCrfeni (TiN) in accordance with alloy components 0.6 Formulated, the quality required to convert the alloy ingot, using electronic balance accurately, pretreatment of each group of raw materials before smelting; pretreatment is to remove the oxide treatment for each group of raw materials, and then in ultrasonic cleaning instrument Ultrasound cleaning treatment, finally naturally dried, and then step in the first embodiment.

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Abstract

The invention relates to the technical field of alloy preparation, in particular to a L1 2 The invention discloses a precipitation-strengthened high-entropy alloy and a preparation method thereof, which are suitable for high-strength and wear-resistant components used in service at room temperature. The L1 2 Type precipitation-strengthened high-entropy alloys are directly mixed with TiN ceramic phases in AlCoCrFeNi high-entropy alloys with a body-centered cubic structure to obtain nanostructures (Ni 3 [Al, Ti]) of AlCoCrFeNi(TiN) x High entropy alloy, x is 0.2, 0.4, 0.6, 0.8, 1.0. The present invention prepares high-entropy alloys containing ceramic phases through vacuum electric arc furnace melting technology, and obtains L1 with better toughness by adjusting the content of TiN elements in different atomic ratios. 2 type nanostructure (Ni 3 [Al, Ti]), analyze and observe the change of mechanical properties, so as to obtain the high-entropy alloy with the best comprehensive mechanical properties.

Description

Technical field [0001] The present invention relates to the field of alloy preparation techniques, particularly, to a L1 2 Precipitation strengthening type high entropy alloy and preparation method for parts of high wear resistance at room temperature and service applications. Background technique [0002] High-entropy alloys since the introduction of widespread concern, its unique properties is expected to break through the bottleneck of traditional alloys. 1 or 2 as a main alloy element is added unlike the conventional alloying elements, supplemented by additional design, high entropy alloys typically consist of more than four main elements, a constant ratio of atomic designed. Moreover, excellent performance of its high entropy alloy having five closely related characteristics: ① high entropic effect on the thermodynamics; slow diffusion effect on the kinetics ②; ③ lattice distortion effect on the structure; 'cocktail effect' on performance ④ ; ⑤ high stability on the tissue. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C32/00C22C1/10
CPCC22C30/00C22C32/0068C22C1/1036
Inventor 张楠楠金冰倩于惠舒马永亮郝德喜李德元郭旭敏马佳林
Owner SHENYANG POLYTECHNIC UNIV
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