Soft-hard composite nanometer multi-coating cutter and preparation method thereof

A soft-hard composite and nano-multi-layer technology, which is applied in the coating, metal material coating process, superimposed layer plating, etc., can solve problems such as increased friction coefficient, coating peeling, and affecting the surface quality of the processed workpiece. Achieve the effect of improving the hardness of the coating, enhancing the bonding force and reducing the residual thermal stress

Active Publication Date: 2018-08-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main hard coating ZrN in this coating will increase the friction coefficient with the increase of the cutting distance, which will affect the surface quality of the processed workpiece. When the friction distance increases further and exceeds 1000m, the coating will peel off.

Method used

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  • Soft-hard composite nanometer multi-coating cutter and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] The steps of the preparation method of embodiment one are as follows:

[0032] (1) Pre-treatment: mirror-polish the cemented carbide substrate, put it in acetone solution for ultrasonic cleaning for 15 minutes, then put it in alcohol solution for ultrasonic cleaning for 15 minutes, dry it with nitrogen and put it into the vacuum chamber of the coating machine. During this process, it is forbidden to touch Touch the surface of the substrate, and the vacuum chamber is evacuated to 3.0×10 -4 Pa, heated to 350°C and held for 30 minutes.

[0033](2) Glow cleaning: Ar gas is introduced, the working pressure is 1.5Pa, and glow discharge cleaning is carried out for 20 minutes to remove tiny impurities attached to the surface of the substrate.

[0034] (3) Depositing Zr: DC magnetron sputtering technology was adopted, a pure Zr target was placed on the DC target source, high-purity Ar gas was introduced, the Ar flow rate was 70 sccm, the deposition pressure was 0.5 Pa, the depo...

Embodiment 2

[0038] The steps of the preparation method of embodiment two are as follows:

[0039] (1) Pre-treatment: mirror-polish the cemented carbide substrate, put it in acetone solution for ultrasonic cleaning for 15 minutes, then put it in alcohol solution for ultrasonic cleaning for 15 minutes, dry it with nitrogen and put it into the vacuum chamber of the coating machine. During this process, it is forbidden to touch Touch the surface of the substrate, and the vacuum chamber is evacuated to 3.0×10 -4 Pa, heated to 350°C and held for 30 minutes.

[0040] (2) Glow cleaning: Ar gas is introduced, the working pressure is 1.5Pa, and glow discharge cleaning is carried out for 20 minutes to remove tiny impurities attached to the surface of the substrate.

[0041] (3) Depositing Zr: DC magnetron sputtering technology was adopted, a pure Zr target was placed on the DC target source, high-purity Ar gas was introduced, the Ar flow rate was 70 sccm, the deposition pressure was 0.5 Pa, the dep...

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Abstract

The invention provides a soft-hard composite nanometer multi-coating cutter and a preparation method thereof. The soft-hard composite nanometer multi-coating cutter is characterized in that a matrix material is hard alloy, and the coatings include a Zr transition layer, a (ZrN-CrCN)x periodic composite multilayer nano hard coating and a WS2 soft coating in sequence from bottom to top. In preparation of the coatings, only N2 is adopted as reaction gas, the other coating elements are solid targets respectively, so that the pollution in deposition of different coatings is effectively prevented. The WS2 soft coating has extremely-low shearing strength and friction coefficient, the (ZrN-CrCN)x periodic composite multilayer nano hard coating has extremely-high wear resistance, and as a transition layer, Zr is used for reducing residual heat stress between the coatings and the matrix, so that the bonding force between the coatings and the matrix is improved; the wear resistance of the cutteris greatly improved, and the cutting force and the cutting temperature of the cutter in cutting are reduced, so that the cutter can better adapt to severe cutting environment in cutting.

Description

technical field [0001] The invention belongs to the technical field of mechanical cutting tool manufacturing, and in particular relates to a novel soft-hard composite nano-multilayer coating tool and a preparation method thereof. Background technique [0002] The advantages of hard coatings for cutting tools are high hardness and good wear resistance. According to the composition of coating materials, coated cutting tools can be divided into binary coatings, ternary coatings, and multi-component coatings. Later, the structural form of coatings also changed, and gradient coatings, micron coatings, and nano coatings appeared one after another. The coating has also developed from a single layer to later double-layer, multi-layer, and nano-scale multi-layer, and the hardness and wear resistance of the coating have been continuously improved. The soft-coated tool has lower shear strength, and the friction coefficient between the tool and the workpiece is lower, but the wear resi...

Claims

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Application Information

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IPC IPC(8): C23C14/02C23C14/06C23C14/16C23C14/35C23C28/00
CPCC23C14/0036C23C14/022C23C14/0623C23C14/0641C23C14/0664C23C14/165C23C14/352C23C28/322C23C28/347C23C28/40
Inventor 连云崧穆晨亮姚斌卓勇肖望强陈汇丰
Owner XIAMEN UNIV
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