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High-entropy alloy powder for laser cladding and preparation method of cladding layer

A technology of laser cladding and high-entropy alloys, which is applied in the coating process of metal materials, coatings, etc., can solve the problems of small thermal influence of heating and cooling rates, and less high-entropy alloys, so as to improve the bonding strength and scrap rate of parts Low, small thermal deformation effect

Inactive Publication Date: 2016-11-09
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, research on the microstructure and properties of high-entropy alloys prepared by arc melting has achieved great results at home and abroad. There are relatively few studies, and laser cladding has great advantages in technology, such as: high heating and cooling rates, small thermal influence on the substrate, fine grains of the cladding layer and uniform distribution in the substrate, cladding layer Metallurgical bonding with the substrate, high bonding strength, and the thickness of the cladding layer can reach a few millimeters. The most important thing is that the powder that can be used as the cladding layer is very wide. Therefore, laser cladding technology is used to prepare high-entropy alloy cladding coatings. With technological and theoretical feasibility, it has become a new hotspot in the research of high-entropy alloys

Method used

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  • High-entropy alloy powder for laser cladding and preparation method of cladding layer
  • High-entropy alloy powder for laser cladding and preparation method of cladding layer
  • High-entropy alloy powder for laser cladding and preparation method of cladding layer

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Embodiment 1

[0023] The high-entropy alloy powder for laser cladding described in this embodiment is composed of Ti, Zr, V, Nb, Ta and Mo element powders, and the atomic percentages of each component are 16% Ti, 17% Zr, and 16% V , 14% Nb, 23% Ta, 14% Mo.

[0024] The preparation method of the high-entropy alloy powder cladding layer for laser cladding is provided, comprising the following steps:

[0025] (1) After mixing the various powders in proportion, all of them are introduced into a vacuum ball mill tank, ball milled for 3 hours, and fully mixed to obtain alloy powder with a particle size of 180-250 mesh;

[0026] (2) Mix the alloy powder obtained in step (1) with absolute ethanol to obtain a coating material, which consists of 91% by mass alloy powder and 9% absolute ethanol, and evenly coat the coating material on the Coarsely grind to remove the surface scale, and then clean the surface of the 45# steel base material with an ultrasonic cleaning machine filled with alcohol to rem...

Embodiment 2

[0029] The high-entropy alloy powder for laser cladding described in this embodiment is composed of Ti, Zr, V, Nb, Ta and Mo element powders, and the atomic percentages of each component are 18% Ti, 18% Zr, and 19% V , 15% Nb, 15% Ta, 15% Mo.

[0030] The preparation method of the high-entropy alloy powder cladding layer for laser cladding is provided, comprising the following steps:

[0031] (1) After mixing each alloy powder in proportion, all of them are introduced into a vacuum ball mill tank, ball milled for 4 hours, and fully mixed to obtain alloy powder with a particle size of 200-300 mesh;

[0032](2) Mix the alloy powder obtained in step (1) with absolute ethanol to obtain a coating material, which consists of 90% by mass alloy powder and 10% absolute ethanol, and uniformly coat the coating material at 45 The surface of No. 45 steel base material, in which the No. 45 steel base material is coarsely ground to remove surface scale, and then cleaned by an ultrasonic cle...

Embodiment 3

[0035] The high-entropy alloy powder for laser cladding described in this embodiment is composed of Ti, Zr, V, Nb, Ta and Mo element powders, and the atomic percentages of each component are 19% Ti, 19% Zr, and 21% V , 17% Nb, 8% Ta, 16% Mo.

[0036] The preparation method of the high-entropy alloy powder cladding layer for laser cladding is provided, comprising the following steps:

[0037] (1) After mixing each alloy powder in proportion, all of them are introduced into a vacuum ball mill tank, ball milled for 3.5 hours, and fully mixed to obtain alloy powder with a particle size of 250-325 mesh;

[0038] (2) Mix the alloy powder obtained in step (1) with absolute ethanol to obtain a coating material, which consists of 95% by mass alloy powder and 5% absolute ethanol, and uniformly coat the coating material at 45 The surface of No. 45 steel base material, among them, the No. 45 steel base material is coarsely ground to remove the surface scale, and then cleaned by an ultras...

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Abstract

The invention discloses high-entropy alloy powder for laser cladding and a preparation method of a cladding layer. The high-entropy alloy powder comprises Ti, Zr, V, Nb, Ta and Mo. In addition, high-entropy alloy powder which comprises Ti, Zr, V, Nb, Ta, Mo and W, high-entropy alloy powder which comprises Ti, Zr, V, Nb, Ta, Mo, W and Cr and the preparation method of the cladding layer of the high-entropy alloy powder for laser cladding are provided. The high-entropy alloy powder mainly comprises two characteristics, namely, the high-entropy effect and the cocktail effect, each kind of powder exerts respective advantages, and therefore the cladding layer with high hardness, high corrosion resistance, excellent tempering softening resisting performance and excellent structure performance is obtained. Metallurgical bonding is formed by an alloy layer and a matrix through laser cladding; the bonding strength of the cladding layer and the matrix is greatly improved, and the heating speed is high; metal of the cladding layer is not prone to being diluted by the matrix; little heat deformation is generated; and therefore the part rejection rate is low.

Description

technical field [0001] The invention relates to the field of laser surface modification, and more specifically relates to a high-entropy alloy powder for laser cladding and a method for preparing a cladding layer. Background technique [0002] Traditional alloys are mainly based on one element, and their structure and performance are improved by adding a small amount of elements, while high-entropy alloys are a new type of multi-principal alloy recently developed. Although high-entropy alloys have been around for more than a decade, their qualities were not available for scientific study until recently. At present, high-entropy alloys are receiving more and more attention. High-entropy alloys usually contain at least five metal elements, and the atomic ratio of each metal element should be between 5% and 35%. Because high-entropy alloys have very high Mixing entropy, often tends to form a simple solid solution phase of face-centered cubic structure (FCC) or body-centered cu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/00C23C24/10
CPCC22C30/00C23C24/106
Inventor 刘洪喜穆永坤张晓伟董涛
Owner KUNMING UNIV OF SCI & TECH
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