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A soft-hard composite nano-multilayer coating tool and its preparation method

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

Active Publication Date: 2019-05-28
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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  • A soft-hard composite nano-multilayer coating tool and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The steps of the preparation method of Example 1 are as follows:

[0032] (1) Pre-treatment: The cemented carbide substrate is mirror-polished, put in acetone solution for ultrasonic cleaning for 15 minutes, and then put into alcohol solution for ultrasonic cleaning for 15 minutes, dried by nitrogen, and placed in the vacuum chamber of the coating machine. This process is forbidden to touch Touch the surface of the substrate, and the vacuum chamber is evacuated to 3.0×10 -4 Pa, heat to 350°C, hold for 30 minutes.

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

[0034] (3) Deposition of Zr: Using DC magnetron sputtering technology, a pure Zr target is selected and placed on the DC target source, high-purity Ar gas is introduced, the Ar flow is 70 sccm, the deposition pressure is 0.5 Pa, the deposition power is 200 W, and the deposition thickn...

Embodiment 2

[0038] The steps of the preparation method of Example 2 are as follows:

[0039] (1) Pre-treatment: The cemented carbide substrate is mirror-polished, put in acetone solution for ultrasonic cleaning for 15 minutes, and then put into alcohol solution for ultrasonic cleaning for 15 minutes, dried by nitrogen, and placed in the vacuum chamber of the coating machine. This process is forbidden to touch Touch the surface of the substrate, and the vacuum chamber is evacuated to 3.0×10 -4 Pa, heat to 350°C, hold for 30 minutes.

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

[0041] (3) Deposition of Zr: Using DC magnetron sputtering technology, a pure Zr target is selected and placed on the DC target source, high-purity Ar gas is introduced, the Ar flow is 70 sccm, the deposition pressure is 0.5 Pa, the deposition power is 200 W, and the deposition thickn...

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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 particularly relates to a novel soft and hard composite nano multilayer coating tool and a preparation method thereof. Background technique [0002] The advantages of tool hard coating are high hardness and good wear resistance. According to the composition of the coating material, the coated tool can be divided into binary coating, ternary coating, and multi-element coating. Later, the structure of the coating has also changed, and gradient coatings, micro-coatings, and nano-coatings have appeared one after another. The coating has also developed from a single layer to later double-layer, multilayer, and nano-level multilayers, and the hardness and wear resistance of the coating have been continuously improved. Soft-coated tools have low shear strength, and the friction coefficient between the tool and the workpiece is low, but the soft-coated tools have poor wear r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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