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Quaternary refractory high-entropy alloy coating resistant to high-temperature oxidation and laser cladding preparation method thereof

A technology of high-temperature oxidation resistance and laser cladding, which is applied in the direction of metal material coating technology, coating, metal processing equipment, etc., can solve the problems of difficult application scenarios, high brittleness of metal ceramics, and poor oxidation resistance, etc., to achieve high Stable preparation process characteristics, uniform particle size, and rapid preparation effects

Inactive Publication Date: 2022-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oxidation resistance of alloy materials is similar to or slightly inferior to that of steel; cermets are brittle and prone to fragmentation during use; organic materials may undergo structural decomposition in some cases, making it difficult to apply to complex and changeable application scenarios

Method used

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  • Quaternary refractory high-entropy alloy coating resistant to high-temperature oxidation and laser cladding preparation method thereof
  • Quaternary refractory high-entropy alloy coating resistant to high-temperature oxidation and laser cladding preparation method thereof
  • Quaternary refractory high-entropy alloy coating resistant to high-temperature oxidation and laser cladding preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] Embodiment 1: The laser cladding preparation method of the high-temperature oxidation-resistant quaternary refractory high-entropy alloy coating in this embodiment is achieved by the following steps:

[0030] Step 1. Weigh 10g of quaternary FeCrAlWx refractory high-entropy alloy powder, and on the surface of pre-coated steel with a size of 4cm*5cm*3cm, the ratio of high-entropy alloy powder mass to coating area is 1g: 2cm 2 , the thickness of pre-laid powder is 5mm; the height of steel is 10cm;

[0031] Step 2. Through the laser cladding technology, with a laser power of 2200W, a rate of 7cm / s, a spot diameter of 3mm, and a lap spacing of 1.5mm, an anti-high temperature oxidation quaternary refractory high-entropy alloy coating was constructed in situ on the steel surface. layer, where x=0.25.

[0032] In this embodiment, the quaternary FeCrAlWx refractory high-entropy alloy powder is prepared according to the following steps: weigh 41.38% iron, 38.38% chromium, 19.99%...

Embodiment 2

[0033] Embodiment 2: The laser cladding preparation method of the high-temperature oxidation-resistant quaternary refractory high-entropy alloy coating in this embodiment is achieved by the following steps:

[0034] Step 1. Weigh 10g of quaternary FeCrAlWx refractory high-entropy alloy powder, and on the surface of pre-coated steel with a size of 4cm*5cm*3cm, the ratio of high-entropy alloy powder mass to coating area is 1g: 2cm 2 , the thickness of pre-laid powder is 5mm; the height of steel is 10cm;

[0035] Step 2. Through the laser cladding technology, with a laser power of 2200W, a rate of 7cm / s, a spot diameter of 3mm, and a lap spacing of 1.5mm, an anti-high temperature oxidation quaternary refractory high-entropy alloy coating was constructed in situ on the steel surface. layer, where x=0.5.

[0036] In this embodiment, the quaternary FeCrAlWx refractory high-entropy alloy powder is prepared according to the following steps: weigh 41.27% iron, 38.33% chromium, 19.9% ​...

Embodiment 3

[0037] Embodiment 3: The laser cladding preparation method of the high-temperature oxidation-resistant quaternary refractory high-entropy alloy coating in this embodiment is achieved by the following steps:

[0038] Step 1. Weigh 10g of quaternary FeCrAlWx refractory high-entropy alloy powder, and on the surface of pre-coated steel with a size of 4cm*5cm*3cm, the ratio of high-entropy alloy powder mass to coating area is 1g: 2cm 2 , the thickness of pre-laid powder is 5mm; the height of steel is 10cm;

[0039]Step 2. Through the laser cladding technology, with a laser power of 2200W, a rate of 7cm / s, a spot diameter of 3mm, and a lap spacing of 1.5mm, an anti-high temperature oxidation quaternary refractory high-entropy alloy coating was constructed in situ on the steel surface. layer, where x=0.75.

[0040] In this embodiment, the quaternary FeCrAlWx refractory high-entropy alloy powder is prepared according to the following steps: weigh 41.17% iron, 38.23% chromium, 19.85% ...

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Abstract

The invention discloses a high-temperature-oxidation-resistant quaternary refractory high-entropy alloy coating and a laser cladding preparation method thereof, and belongs to the technical field of metal material corrosion and protection. The purpose of the invention is to improve the high-temperature environment stability of the steel. The method comprises the steps that firstly, quaternary FeCrAlWx refractory high-entropy alloy powder is preset and coated on the surface of steel; and secondly, by means of the laser cladding technology, the high-temperature-oxidation-resistant quaternary refractory high-entropy alloy coating is constructed on the surface of the steel in situ at the laser power of 1500 W to 10000 W and the speed of 1 mm / s to 5 cm / s, and x ranges from 0.25 to 2. The service stability and the service life of the steel in a high-temperature environment are improved, and the high-temperature oxidation resistance of the steel is improved.

Description

technical field [0001] The invention belongs to the technical field of corrosion and protection of metal materials, and in particular relates to a high-temperature oxidation-resistant quaternary refractory high-entropy alloy coating and laser cladding of the high-temperature oxidation-resistant quaternary refractory high-entropy alloy coating Preparation. Background technique [0002] As a common structural material with adjustable physical and chemical properties, steel is used in various fields. Among them, it is often used for structural materials in nuclear reactors. However, in the high temperature environment of the nuclear reactor, it is easy to produce high temperature oxidation, resulting in the formation of oxide scale on the surface and peeling off. Therefore, improving the oxidation resistance of structural steel in high temperature environment is an urgent problem to be solved to promote the development of nuclear reactors. [0003] At present, the main metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10B22F9/04B22F1/05
CPCC23C24/106B22F1/05B22F9/04B22F2009/043Y02E30/30
Inventor 吴晓宏卢松涛姚忠平秦伟李杨
Owner HARBIN INST OF TECH
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