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Preparation method of diamond enhanced high-entropy alloy composite coating

A diamond-enhanced, high-entropy alloy technology, which is applied in the field of cladding to prepare diamond-enhanced high-entropy alloy composite coatings, can solve the problems of lower coating quality, heat damage, diamond graphitization, etc., to reduce costs and improve wear resistance effect on corrosion resistance

Active Publication Date: 2019-03-15
郑州亚新超硬材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Diamond has high surface energy and is easily damaged by heat, which makes it difficult for ordinary metal materials to wet, and high temperature can easily lead to diamond graphitization, which reduces the performance of diamond and ultimately reduces the quality of the coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Step 1. Pretreat the surface of the 20 steel workpiece, that is, polish the surface with sandpaper to remove rust, deburr and flash, and remove the oil stain on the surface with acetone;

[0017] Step 2: Mix Cu, Ni-Cr-B-Si, Co-Cr-B-Si, and Fe-Cr-B-Si mixed powders by ball milling in a certain proportion to make high-entropy alloy powders; Cu elemental metal powders The purity of Ni-Cr-B-Si is 99.5%~100%, and the particle size of powder is 30μm~300μm; the composition mass percentage of Ni-Cr-B-Si is Cr: 14~17, B: 2.5~4.5, Si: 3~4.5, C: 0.6~0.9, the rest is Ni; the composition mass percentage of Fe-Cr-B-Si is Cr: 12~15, B: 2.5~4.5, Si: 3~4.5, C: 0.6~1.0, and the rest is Fe; Co- The composition mass percentage of Cr-B-Si is Cr: 15~18, B: 2.5~4.5, Si: 3~4.5, C: 0.5~0.8, and the rest is Co; where Cu, Ni-Cr-B-Si, Co - The mass percentages of Cr-B-Si and Fe-Cr-B-Si are: 23:23:27:27. Among them, the ball mill mixing is carried out by using a steel ball mill jar for ball mill ...

Embodiment 2

[0023] Step 1. Pretreat the surface of the 45 steel workpiece, that is, use a grinding wheel or sandpaper to polish the surface to remove rust, deburr and flash, and use acetone to remove the oil on the surface;

[0024] Step 2: Mix Cu, Ni-Cr-B-Si, Co-Cr-B-Si, and Fe-Cr-B-Si mixed powders by ball milling in proportion, wherein the purity of Cu elemental metal powder is 99.5%~100% , the particle size of the powder is 30μm~300μm; the composition mass percentage of Ni-Cr-B-Si is Cr: 14~17, B: 2.5~4.5, Si: 3~4.5, C: 0.6~0.9, and the rest is Ni; The composition mass percentage of Fe-Cr-B-Si is Cr: 12~15, B: 2.5~4.5, Si: 3~4.5, C: 0.6~1.0, and the rest is Fe; the composition mass of Co-Cr-B-Si The percentage is Cr: 15~18, B: 2.5~4.5, Si: 3~4.5, C: 0.5~0.8, and the rest is Co; among them Cu, Ni-Cr-B-Si, Co-Cr-B-Si, Fe - The mass percentage of Cr-B-Si is: 28:23:22:23. A steel ball milling jar was used for ball milling and mixing, the mass ratio of the balls to the mixed powder was 3...

Embodiment 3

[0030] Step 1. Pretreat the surface of the Q235 steel workpiece, that is, use a grinding wheel or sandpaper to polish the surface to remove rust, deburr and flash, and use acetone to remove the oil on the surface;

[0031] Step 2: Mix Cu, Ni-Cr-B-Si, Co-Cr-B-Si, and Fe-Cr-B-Si mixed powders by ball milling in a certain proportion to make high-entropy alloy powders; Cu elemental metal powders The purity of Ni-Cr-B-Si is 99.5%~100%, and the particle size of powder is 30μm~300μm; the composition mass percentage of Ni-Cr-B-Si is Cr: 14~17, B: 2.5~4.5, Si: 3~4.5, C: 0.6~0.9, the rest is Ni; the composition mass percentage of Fe-Cr-B-Si is Cr: 12~15, B: 2.5~4.5, Si: 3~4.5, C: 0.6~1.0, and the rest is Fe; Co- The composition mass percentage of Cr-B-Si is Cr: 15~18, B: 2.5~4.5, Si: 3~4.5, C: 0.5~0.8, and the rest is Co; where Cu, Ni-Cr-B-Si, Co - The mass percentages of Cr-B-Si and Fe-Cr-B-Si are: 25:25:25:25. Among them, the ball milling mixing is carried out by using a steel ball ...

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Abstract

The invention discloses a preparation method of a diamond enhanced high-entropy alloy composite coating. The method comprises the following steps that a mechanical method is adopted for treating the surface of a workpiece in advance and carrying out oil and dust removing, Cu, Ni-Cr-B-Si, Co-Cr-B-Si and Fe-Cr-B-Si are subjected to ball milling and mixing to prepare high-entropy alloy powder, afterbeing mixed, the mixture is prefabricated on the surface of a steel base body and subjected to induction heating to prepare the high-entropy alloy coating, then under protection of inert gas Ar, heating is carried out, diamond with the particle diameter being 3*35 micrometers is pressed, and the diamond enhanced high-entropy alloy composite coating is prepared. The coating has higher hardness andwear resisting performance, the diamond is pressed at a high temperature, thus graphitizing of the diamond in the heating process is avoided, in addition, a small amount of carbide is formed on the interface of the diamond, and the connecting strength is improved. The high-entropy alloy base body and the diamond have the characteristics of high strength and high wear resistance, and thus the coating has good wear resisting performance and good corrosion resisting performance.

Description

technical field [0001] The invention belongs to the surface treatment of metal materials, and more specifically relates to a diamond-enhanced high-entropy alloy composite coating prepared by cladding. Background technique [0002] Agricultural machinery, mining machinery and other mechanical products often work in harsh wear environments, so their equipment components often suffer from large abrasive wear. This type of wear is essentially caused by cutting a small amount of chips from the surface of the material. The grinding debris obtained from the abrasive wear test in the laboratory is observed to be similar to cutting chips, in the form of spirals, bends, etc., so increasing the surface hardness can solve this type of wear. In order to reduce the abrasive wear caused by the erosion of materials and hard particles on equipment parts, a layer of wear-resistant material is often coated on the surface of equipment parts to increase the hardness, which can protect the equipm...

Claims

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Application Information

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IPC IPC(8): C23C24/10
CPCC23C24/103
Inventor 卢金斌冯杰张明敏殷振穆云超赫青山
Owner 郑州亚新超硬材料有限公司
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