High-hardness, single-phase and high-entropy alloy coating and preparation method and application thereof

A high-entropy alloy and high-hardness technology, which is applied in the coating process of metal materials, coatings, mechanical equipment, etc., can solve the problems of harsh preparation process requirements and large-scale promotion and use, and achieve simple process and electrochemical corrosion resistance Excellent, good abrasion resistance effect

Active Publication Date: 2016-06-15
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problem that the existing high-entropy alloys cannot be widely used in industry due to th

Method used

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  • High-hardness, single-phase and high-entropy alloy coating and preparation method and application thereof
  • High-hardness, single-phase and high-entropy alloy coating and preparation method and application thereof
  • High-hardness, single-phase and high-entropy alloy coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 takes the preparation of an AlFeCoNiVTi high-entropy alloy coating as an example, and the preparation process is as follows:

[0030] The first step: Al, Fe, Co, Ni, V, Ti six powders with a particle size of 5-30 μm and a purity of not less than 99.9%, according to an equimolar ratio of Al: Fe: Co: Ni: V: Ti = 1 :1:1:1:1:1 Weigh and mix, put into ball mill for 3 hours.

[0031] Step 2: put the ball-milled powder into a drying oven, and dry it at a temperature range of 100-120°C for 2 hours.

[0032] The third step: Q235 steel plate can be used as the base material, and the oil is removed by alkali washing, and then 40 mesh brown corundum is used for sandblasting and rust removal, and the air pressure of sandblasting is 0.5-0.7MPa.

[0033] Step 4: Preset the ball-milled and dried powder evenly on the surface of the Q235 steel plate with a thickness of 0.2mm for the pre-alloyed powder. Using YGA solid-state laser for multi-pass laser irradiation, the specific...

Embodiment 2

[0036] Example 2 to prepare Al 1.2 Taking FeCoNiVTi high-entropy alloy coating as an example, the preparation method is as follows:

[0037] The first step: Al, Fe, Co, Ni, V, Ti six powders with a particle size of 5-30 μm and a purity of not less than 99.9%, according to the molar ratio Al:Fe:Co:Ni:V:Ti=1.2:1 :1:1:1:1 Weigh and mix, put into ball mill and mill for 4 hours.

[0038] Step 2: put the ball-milled powder into a drying oven, and dry it at a temperature range of 100-120°C for 2 hours.

[0039] The third step: choose 12CrMo low-alloy steel plate as the base material, wash with alkali to remove oil, and then use 40 mesh brown corundum to sandblast and remove rust, and the air pressure of sandblasting is 0.5-0.7MPa.

[0040] Step 4: evenly place the ball-milled and dried powder on the surface of the 12CrMo low-alloy steel plate, and the thickness of the alloy powder is 0.2mm. Using YGA solid-state laser for multi-pass laser irradiation, the specific process paramete...

Embodiment 3

[0043] Example 3 to prepare Al 1.5 Taking FeCoNiVTi high-entropy alloy coating as an example, the preparation method is as follows:

[0044] The first step: Al, Fe, Co, Ni, V, Ti six powders with a particle size of 5-30 μm and a purity of not less than 99.9%, according to the molar ratio Al:Fe:Co:Ni:V:Ti=1.5:1 :1:1:1:1 Weigh and mix, put into ball mill for 2 hours.

[0045] Step 2: put the ball-milled powder into a drying oven, and dry it at a temperature range of 100-120°C for 2 hours.

[0046] The third step: choose Cr13Ni5 martensitic stainless steel plate as the base material, wash with alkali to remove oil, and then use 40 mesh brown corundum to sandblast and remove rust, and the air pressure of sandblasting is 0.5-0.7MPa.

[0047] Step 4: The ball-milled and dried powder is evenly placed on the surface of the stainless steel plate, and the thickness of the alloy powder is 0.3 mm. Using YGA solid-state laser for multi-pass laser irradiation, the specific process parame...

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Abstract

The invention discloses a high-hardness, single-phase and high-entropy alloy coating and a preparation method and application thereof. The preparation method comprises the following steps of mixing Al powder, Fe powder, Co powder, Ni powder, V powder and Ti powder according to the molar ratio of Al:Fe:Co:Ni:V:Ti=(x=1.0-1.5):1:1:1:1:1, and then preparing a AlxFeCoNiVTi high-entropy alloy coating on the surface of a part, wherein x=1.0-1.5, the hardness range of the coating is 800-1100 HV, and the coating is of a body-centered cubic (bcc) single-phase solid solution structure. The body-centered-cubic-structure single-phase solid solution high-entropy alloy coating obtained by a laser cladding method is high in hardness and excellent in electrochemical corrosion resistance, has good wear-corrosion resistance, and is particularly suitable for protecting surfaces of parts such as blades of hydraulic turbines and blades of fans.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to a method for preparing a single-phase high-hardness high-entropy alloy coating by adopting laser cladding technology. Background technique [0002] High-entropy alloys are formed by melting, sintering or other methods of combining n (n ≥ 5) metals or metals and non-metals in equimolar or unequal molar ratios (the atomic percentage of each component does not exceed 35%). Materials with metallic properties. Because there are many metal elements in the alloy, the degree of disorder is large, and the high entropy effect promotes the mixing of elements, so that a variety of main elements tend to be chaotically arranged to form a simple crystal phase, that is, mixed into body-centered cubic crystals or face-centered cubic crystals, or even non-metallic crystals. Crystallization, while inhibiting the formation of brittle intermetallic compounds. The characteristics of high-entropy allo...

Claims

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Application Information

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IPC IPC(8): C23C24/10F03B3/12
CPCC23C24/106F03B3/12F05B2230/90Y02E10/20
Inventor 王灿明孙宏飞崔洪芝刘亮
Owner SHANDONG UNIV OF SCI & TECH
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