High-hardness and high-wear resistance refractory high-entropy intermetallic compound coating and preparation method thereof

An intermetallic compound, high wear resistance technology, applied in the direction of metal material coating process, coating, etc., can solve the problems of high brittleness, difficult processing, difficult to apply to large engineering components, etc., to achieve good protection effect, crack sensitivity The effect of low resistance and high hardness

Active Publication Date: 2021-08-20
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, bulk Ni 3 Due to the existence of Ni-Al covalent bonds in the Al ordered alloy, it is brittle and difficult to process, so it is difficult to apply to large engineering components

Method used

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  • High-hardness and high-wear resistance refractory high-entropy intermetallic compound coating and preparation method thereof
  • High-hardness and high-wear resistance refractory high-entropy intermetallic compound coating and preparation method thereof
  • High-hardness and high-wear resistance refractory high-entropy intermetallic compound coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A refractory high-entropy intermetallic compound coating with high hardness and high wear resistance is prepared according to the following steps:

[0028] 1) For powder preparation, Fe, Co, Ni and Al metal powders are selected and mixed evenly in a molar ratio of 1:1:1:1. The purity of Fe, Co, Ni and Al metal powders is greater than or equal to 99.6%, and the powder particle size is 45 -105 μm.

[0029] 2) Powder ball milling, the above-mentioned mixed powder is placed in a stainless steel ball mill tank for ball milling for 2 hours, the speed of the ball mill is 300rmp / s, after the powder after ball milling passes through a 200 mesh sieve, it is placed in a vacuum desiccator for future use;

[0030] 3) Grinding the base material, using 45# steel plate with a size of 40mm×30mm×10mm as the base material, and removing the cladding surface scale on the grinder and sandpaper, after that, cleaning the surface oil with alcohol and drying it with a hair dryer. Store dry.

...

Embodiment 2

[0033] A refractory high-entropy intermetallic compound coating with high hardness and high wear resistance is prepared according to the following steps:

[0034] 1) For powder preparation, Fe, Co, Ni and Al metal powders are selected and mixed evenly in a molar ratio of 1:1:1:1. The purity of Fe, Co, Ni and Al metal powders is greater than or equal to 99.6%, and the powder particle size is 45 -105 μm.

[0035] 2) Powder ball milling, the above-mentioned mixed powder is placed in a stainless steel ball mill tank for ball milling for 2 hours, the speed of the ball mill is 300rmp / s, after the powder after ball milling passes through a 200 mesh sieve, it is placed in a vacuum desiccator for future use;

[0036] 3) Grinding the base material, using 45# steel plate with a size of 40mm×30mm×10mm as the base material, and removing the cladding surface scale on the grinder and sandpaper, after that, cleaning the surface oil with alcohol and drying it with a hair dryer. Store dry.

...

Embodiment 3

[0039] A refractory high-entropy intermetallic compound coating with high hardness and high wear resistance is prepared according to the following steps:

[0040] 1) For powder preparation, Fe, Co, Ni and Al metal powders are selected and mixed evenly in a molar ratio of 1:1:1:1. The purity of Fe, Co, Ni and Al metal powders is greater than or equal to 99.6%, and the powder particle size is 45 -105 μm.

[0041] 2) Powder ball milling, the above-mentioned mixed powder is placed in a stainless steel ball mill tank for ball milling for 2 hours, the speed of the ball mill is 300rmp / s, after the powder after ball milling passes through a 200 mesh sieve, it is placed in a vacuum desiccator for future use;

[0042] 3) Grinding the base material, using 45# steel plate with a size of 40mm×30mm×10mm as the base material, and removing the cladding surface scale on the grinder and sandpaper, after that, cleaning the surface oil with alcohol and drying it with a hair dryer. Store dry.

...

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Abstract

The invention provides a high-hardness and high-wear resistance refractory high-entropy intermetallic compound coating and a preparation method thereof. A molecular formula is FeCoNiAl. The high-hardness and high-wear resistance refractory high-entropy intermetallic compound coating is prepared by the following steps: 1) powder preparation: selecting Fe metal powder, Co metal powder, Ni metal powder and Al metal powder, and uniformly mixing all the metal powder in a molar ratio of 1: 1: 1: 1; (2) ball milling of powder: putting the mixed powder into a ball-milling tank for ball milling, sieving the ball-milled powder, and then storing the sieved ball-milled powder in a vacuum dryer for later use; (3) base material polishing: polishing the surface of a base material, and performing cleaning and drying; and (4) laser cladding coating preparation: preparing the FeCoNiAl high-entropy alloy coating on the surface of the base material by adopting a prefabricated powder type laser cladding method. The high-hardness and high-wear-resistance refractory high-entropy intermetallic compound coating prepared by the invention has the characteristics of high hardness and low crack sensitivity, is superior to Ni3Al crack sensitivity, and exerts a good protection effect on a traditional iron-based alloy.

Description

technical field [0001] The invention relates to a refractory high-entropy intermetallic compound coating with high hardness and high wear resistance and a preparation method thereof, belonging to the technical field of intermetallic compound coatings. Background technique [0002] Ni 3 Al is a type with L1 2 Type of ordered intermetallic compound, due to the coexistence of internal metal bonds and covalent bonds, it exhibits a series of excellent properties, such as light weight, high hardness, high strength, high wear resistance and excellent oxidation resistance, and is widely considered It is a high-temperature structural material with great potential. [0003] However, bulk Ni 3 Due to the existence of Ni-Al covalent bonds in the Al ordered alloy, it is brittle and difficult to process, so it is difficult to apply to large engineering components. Therefore, it is necessary to develop a refractory high-entropy alloy coating with high hardness and high wear resistance....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C30/00
CPCC23C24/106C22C30/00C22C19/07
Inventor 郭亚雄刘其斌尚小娟
Owner GUIZHOU UNIV
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