A carbon-containing high-entropy alloy material and its preparation method

A high-entropy alloy and alloy technology, applied in metal processing equipment, manufacturing tools, heat treatment equipment, etc., can solve the problems of high price and high production cost, improve room temperature wear resistance, improve wear resistance, and excellent wear resistance Effect

Active Publication Date: 2022-03-25
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, elements such as Ti, V, Mo, and V are expensive, and the production cost is relatively high

Method used

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  • A carbon-containing high-entropy alloy material and its preparation method
  • A carbon-containing high-entropy alloy material and its preparation method
  • A carbon-containing high-entropy alloy material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Design according to the high-entropy alloy composition, regardless of the dilution and burning of elements, the mass percentage of each element is: 25.8% Co, 22.8% Cr, 24.5% Fe, 25.7% Ni, 1.2% C, Concrete preparation method comprises the following steps:

[0030] S1. Vacuum arc smelting: Put the weighed elemental Ni, Co, Fe, Cr, and C with a purity higher than 99.9% into the sample tank in turn, and smelt after vacuuming. The smelting process is repeated several times, and the alloy is obtained after cooling. Ingot; wherein, C is C in the form of 1-3 mm particles crushed from carbon rods.

[0031] S2. Hot forging: heat the alloy ingot obtained by melting at 1000°C for 30 minutes, and then hot forge it into a diameter round stick.

[0032] S3. Vacuum heat treatment: After removing the surface scale of the round rod obtained by hot forging, place it in a vacuum heat treatment furnace. After the furnace is evacuated, it is filled with argon for protection, and then quen...

Embodiment 2

[0034] The mass percent of each element in the high-entropy alloy is: 25.8% Co, 22.7% Cr, 24.5% Fe, 25.7% Ni, 1.3% C. The specific preparation method includes the following steps:

[0035] S1. Vacuum arc smelting: Put the weighed elemental Ni, Co, Fe, Cr, and C with a purity higher than 99.9% into the sample tank in turn, and smelt after vacuuming. The smelting process is repeated several times, and the alloy is obtained after cooling. Ingot, wherein, C is C in the form of 1-3 mm particles crushed from carbon rods.

[0036] S2. Hot forging: After the alloy ingot obtained by melting is kept at 1100°C for 10 minutes, it is hot forged into a diameter round stick.

[0037] S3. Vacuum heat treatment: remove the surface scale from the round rod obtained by hot forging, put it in a vacuum heat treatment furnace, vacuumize the furnace and fill it with argon for protection, then heat it at 1000°C for 5 hours and then quench it to eliminate casting and forging defect.

Embodiment 3

[0039] The mass percent of each element in the high-entropy alloy is: 26.8% Co, 21.7% Cr, 23.5% Fe, 26.7% Ni, 1.3% C. The specific preparation method includes the following steps:

[0040] S1. Vacuum arc smelting: Put the weighed elemental Ni, Co, Fe, Cr, and C with a purity higher than 99.9% into the sample tank in turn, and smelt after vacuuming. The smelting process is repeated several times, and the alloy is obtained after cooling. Ingot, wherein, C is C in the form of 1-3 mm particles crushed from carbon rods.

[0041] S2. Hot forging: heat the alloy ingot obtained by smelting at 1050°C for 20 minutes, and then hot forge it into a diameter round stick.

[0042] S3. Vacuum heat treatment: After removing the surface scale of the round rod obtained by hot forging, place it in a vacuum heat treatment furnace. After the furnace is evacuated, it is filled with argon for protection, and then quenched at 1200°C for 3 hours to eliminate casting and forging. defect.

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Abstract

The invention discloses a carbon-containing high-entropy alloy material and a preparation method thereof, which comprises the following components by weight ratio: Co: 24.8%-26.8%, Cr: 21.7%-23.8%, Fe: 23.5.%-25.5%, Ni: 24.7% to 26.7%, C: 1.2% to 1.3%. The preparation method of the alloy material comprises the following steps: (1) weighing granular carbon, Co, Cr, Fe, Ni according to the proportion, mixing and melting to obtain an alloy ingot; (2) heating the alloy ingot The columnar alloy is obtained by forging; (3) the columnar alloy after hot forging is heat treated under vacuum condition, and the carbon-containing high-entropy alloy material is obtained after quenching. The invention uses the carbon element doped CoCrFeNi high-entropy alloy, the solid solution strengthening of the carbon element and the carbide precipitation strengthening effect, so that the hardness of the alloy is increased, the effect of improving the wear resistance of the alloy at room temperature is obvious, and the amorphous carbon plays a lubricating role. Forging and vacuum heat treatment are carried out on the alloy ingot to reduce the problems of alloy pores and stress concentration, and prepare a high wear-resistant high-entropy alloy with uniform composition and stable performance.

Description

technical field [0001] The invention relates to an alloy material and a preparation method thereof, in particular to a carbon-containing high-entropy alloy material and a preparation method thereof. Background technique [0002] In aerospace, ships, nuclear energy and other fields, various mechanical components operate under extreme conditions (vacuum, high temperature and radiation). In order to ensure the accuracy and service life of components, the alloy materials used to produce parts need to have very high Reliability, stability. Over the past century, attempts have been made to modify alloys to develop high performance alloys for use in extreme environments. The high-entropy alloy breaks the composition limitation of the traditional alloy, and consists of various elements, and the content of each component is between 5 at.% and 35 at.%, all of which are used as the main elements. Structurally, the atoms of high-entropy alloys are arranged chaotically and have serious...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C30/00C22C1/02C22F1/02C21D9/00B21J5/00
CPCC22C30/00C22C1/02C22F1/002C22F1/02C21D9/0075B21J5/002
Inventor 方峰凌艳芳霍文燚周雪峰蒋建清
Owner SOUTHEAST UNIV
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