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Semi-solid forming method of high-melting-point equal-component high-entropy alloy

A semi-solid forming, high-entropy alloy technology, applied in the field of metal materials, can solve the problems that the high-entropy alloy's excellent properties cannot be fully utilized, and achieve the effects of no splashing and turbulence, energy saving, and stable mold filling

Active Publication Date: 2018-05-15
YANSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is precisely because of the limitations of these forming methods that many excellent properties of high-entropy alloys cannot be fully utilized in practical applications.

Method used

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  • Semi-solid forming method of high-melting-point equal-component high-entropy alloy
  • Semi-solid forming method of high-melting-point equal-component high-entropy alloy
  • Semi-solid forming method of high-melting-point equal-component high-entropy alloy

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Experimental program
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Effect test

Embodiment 1

[0026] according to figure 1 The process flow chart of the semi-solid forming method for high-entropy alloys with high melting point and other components is shown. The components of CoCrCuFeNi high-entropy alloys with equiatomic ratios are converted into weight percentages, and 101.95g of pure cobalt, 89.95g of pure chromium, and pure copper are weighed respectively. 109.94g, 96.62g of pure iron, 101.54g of pure nickel, 0.5kg in total; each raw material was ultrasonically cleaned for 10 minutes to remove impurities on the surface of the material, and then the above-mentioned purified raw materials were put into the crucible of the arc melting furnace. Melting was repeated seven times in an argon atmosphere to ensure the uniformity of the alloy composition during the melting process. XRD, SEM and DSC were carried out on the prepared as-cast alloy, and the structure was determined to be the continuous dendrite structure of dual-phase FCC. from figure 2 It can be seen that the...

Embodiment 2

[0030] The components of CoCrCuFeNi high-entropy alloys with equiatomic ratios were converted into weight percentages, and 101.95 g of pure cobalt, 89.95 g of pure chromium, 109.94 g of pure copper, 96.62 g of pure iron, and 101.54 g of pure nickel were weighed, totaling 0.5 kg. Each raw material was ultrasonically cleaned for 10 minutes to remove impurities on the surface of the material. Then put the above-mentioned purified raw materials into the crucible of the electric arc melting furnace, and repeat the melting seven times in an argon atmosphere to ensure the uniformity of the alloy composition during the melting process. XRD, SEM and DSC were performed on the prepared as-cast alloy, and its structure was determined to be the continuous dendrite structure of dual-phase FCC, and its semi-solid range was determined to be from 1117°C to 1450°C. from figure 2 It can be seen that the solidus temperature of CoCrCuFeNi high entropy alloy is T S =1117°C, liquidus temperature ...

Embodiment 3

[0034] The CoCrCuFeNi high-entropy alloy composition of equiatomic ratio is converted into percentage by weight, respectively weighs 101.95g of pure cobalt, 89.95g of pure chromium, 109.94g of pure copper, 96.62g of pure iron, 101.54g of pure nickel, totaling 0.5kg; The raw materials were ultrasonically cleaned for 10 minutes to remove impurities on the surface of the materials, and then the above-mentioned purified raw materials were put into the crucible of the arc melting furnace, and smelted repeatedly in an argon atmosphere for 7 times to ensure the uniformity of the alloy composition during the smelting process. XRD, SEM and DSC were performed on the prepared as-cast alloy, and its structure was determined to be the continuous dendrite structure of dual-phase FCC, and its semi-solid range was determined to be from 1117°C to 1450°C. from figure 2 It can be seen that the solidus temperature of CoCrCuFeNi high entropy alloy is T S =1117°C, liquidus temperature is T L =14...

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Abstract

The invention discloses a semi-solid forming method o a high-melting-point equal-component CoCrCuFeNi high-entropy alloy. The method is mainly characterized in that an electric arc smelting technologyis adopted to repeatedly smelt a high-entropy alloy raw material for seven times, and a uniform-component as-cast high-entropy alloy ingot of a dendrite structure is obtained; the as-cast high-entropy alloy ingot is subject to room-temperature cold-rolling pre-deformation treatment, the alloy ingot subject to cold-rolling deformation is heated to 1160 to 1300 DEG C, heat preservation is carried out for 5 to 80 minutes, and water quenching rapid cooling is carried out, and a semi-solid blank with spherical grains is obtained; the semi-solid blank is subject to quantitative cutting and block cutting according to needs, and reheated to 1160 to 1300 DEG C, heat preservation is carried out for 5 minutes, the blank is rapidly fed into a forming room, through an extrusion method, the semi-solidblank is pressed into a grinding tool prepared in advance, and the formed high-entropy alloy part is obtained. The cost for manufacturing the high-entropy alloy part can be reduced, production efficiency and the product quality are greatly improved, and industrial production of the high-entropy alloy part can be achieved.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to an alloy forming method. Background technique [0002] The emergence of high-entropy alloys represents the advent of a new alloy design concept. In recent years, the development and research of high-entropy alloys have received extensive attention. High-entropy alloys are multi-component solid solutions with stable and simple structures formed by four or more elements under the mixed high-entropy effect. High-entropy alloys have four core effects that other traditional alloys do not have: high-entropy effect, slow diffusion effect, severe lattice distortion, and cocktail effect. These special effects make high-entropy alloys exhibit many special and excellent properties: high hardness, high strength, high fracture toughness, high wear resistance, excellent high temperature resistance, high magnetic saturation, good fatigue resistance , good oxidation resistance and good...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/00C22C30/02B22D17/00
CPCC22C9/00C22C30/02B22D17/007C22C1/12
Inventor 李工张丽军樊建涛刘大进刘日平
Owner YANSHAN UNIV
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