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High-entropy alloy powder, high-resistance coating, as well as preparation method and application thereof

A high-entropy alloy, high-resistance technology, applied in metal material coating process, coating, melt spraying and other directions, can solve the problems of insufficient reliability, low resistance of resistance wire materials, low heating efficiency, etc., to achieve heating efficiency and The effect of high reliability and simple preparation method

Active Publication Date: 2020-10-13
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the conventional electrothermal alloy materials are mainly resistance wires of nickel-chromium or iron-chromium-aluminum alloys, but the resistance of resistance wire materials is relatively low, resulting in low heating efficiency and insufficient reliability.

Method used

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  • High-entropy alloy powder, high-resistance coating, as well as preparation method and application thereof
  • High-entropy alloy powder, high-resistance coating, as well as preparation method and application thereof
  • High-entropy alloy powder, high-resistance coating, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The chemical composition and mass percentage of the alloy material in this embodiment are: nickel: 17%, cobalt: 14%, chromium: 20%, manganese: 14%, iron: balance, and unavoidable impurities. Spraying process parameters are: current: 550A, argon gas flow rate: 30L / min, hydrogen gas flow rate: 10L / min, powder feeding rate: 58g / min, spraying distance: 130mm.

Embodiment 2

[0032] The chemical composition and mass percentage of the alloy material in this embodiment are: nickel: 18%, cobalt: 18%, chromium: 20%, manganese: 17%, iron: balance, and unavoidable impurities. Spraying process parameters are: current: 600A, argon gas flow rate: 38L / min, hydrogen gas flow rate: 12L / min, powder feeding rate: 60g / min, spraying distance: 120mm. figure 1 is the X-ray diffraction (XRD) spectrum of the alloy powder, figure 2 SEM image of alloy powder. image 3 It is the corresponding X-ray diffraction (XRD) spectrogram of the coating prepared in Example 2. Figure 4It is the SEM topography image corresponding to the coating prepared in Example 2. Figure 5 It is the corresponding TEM topography image of the coating prepared in Example 2.

Embodiment 3

[0034] The chemical composition and mass percentage of the alloy material in this embodiment are: nickel: 18%, cobalt: 18%, chromium: 18%, manganese: 17%, iron: balance, and unavoidable impurities. Spraying process parameters are: current: 550A, argon gas flow rate: 30L / min, hydrogen gas flow rate: 10L / min, powder feeding rate: 60g / min, spraying distance: 120mm.

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Abstract

The invention relates to high-entropy alloy powder, a high-resistance coating, as well as a preparation method and application thereof. The high-entropy alloy powder is prepared from the following components in percentage by mass: 17 to 25 percent of nickel, 14 to 25 percent of cobalt, 15 to 20 percent of chromium, 13 to 20 percent of manganese, and the balance iron. The high-entropy alloy powderis applied to the preparation of the high-resistance heating coating. According to the high-resistance coating material provided by the invention, the coating obtains a single-phase structure, the resistance of the coating is improved at the same time, the heating efficiency is improved, and the service reliability is ensured at the same time, so that the high-entropy alloy powder and the high-resistance coating have broad application prospects.

Description

technical field [0001] The invention relates to the technical field of electrothermal materials, in particular to a high-entropy alloy powder, a high-resistance coating and a preparation method and application thereof. Background technique [0002] Traditional alloys are usually based on a single element, but the high-entropy alloy proposed in recent years breaks through this traditional design concept and uses a variety of elements as the main element. This new type of alloy design gives high-entropy alloys a series of Different from the characteristics of traditional alloys, including high entropy effect, hysteresis diffusion effect, lattice distortion effect and cocktail effect, etc. Therefore, high-entropy alloys have excellent properties such as good strength, hardness, wear resistance, corrosion resistance and thermal stability. At present, the preparation and research of high-entropy alloys are mainly concentrated on bulk structural materials, and there are relativel...

Claims

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Application Information

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IPC IPC(8): C23C4/12C23C4/134C22C30/00C22C38/52C22C38/58C23C4/08
CPCC23C4/12C23C4/134C23C4/08C22C30/00C22C38/58C22C38/52
Inventor 周正张硕姚海华郭星晔谈震吴旭邵蔚王国红贺定勇
Owner BEIJING UNIV OF TECH
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