A kind of wear-reducing protective coating with hard and tough substrate surface and preparation method thereof

A protective coating and substrate technology, applied in coating, metal material coating process, vacuum evaporation plating, etc., can solve the problems of high friction coefficient of coating, adhesive wear, difficult processing of alloy materials, etc., and improve processing efficiency , the effect of prolonging the service life

Active Publication Date: 2019-07-16
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the high friction coefficient of titanium-based and chromium-based coatings, the existence of adhesive wear during cutting, and the problems of poor high-temperature oxidation resistance, low hardness and high brittleness of the coating itself, the difficulty of machining the above alloy materials has not been completely solved. The problem

Method used

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  • A kind of wear-reducing protective coating with hard and tough substrate surface and preparation method thereof
  • A kind of wear-reducing protective coating with hard and tough substrate surface and preparation method thereof
  • A kind of wear-reducing protective coating with hard and tough substrate surface and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, the substrate is a cemented carbide blade, and the protective coating on the surface of the substrate is composed of V, Al, and C elements. Al atoms are solid-dissolved in the VC lattice, mainly forming nano-columnar crystal VAlC with a face-centered cubic structure. Wherein the V content is 40%, the Al content is 20%, the C content is 40%, and the diameter of the nanocrystal is 20nm.

[0031] The preparation method of this protective coating is as follows:

[0032] (1) After the substrate is ultrasonically cleaned with alcohol and acetone, it is dried, placed in the coating chamber of the compound ion beam thin film deposition equipment, and pre-evacuated to 2.0×10 -3 Pa.

[0033] (2) Introduce argon gas into the coating chamber, make the argon gas pressure at 0.35Pa, apply a bias voltage of -150V on the substrate, turn on the anode layer ion source, and use the ionized argon ions to etch the surface of the substrate , the etching time is 30 minut...

Embodiment 2

[0041] In this embodiment, the substrate is a high-speed steel blade, and the protective coating on the surface of the substrate is composed of V, Al, and C elements. Al atoms are solid-dissolved in the VC lattice, mainly forming nano-columnar crystal VAlC with a face-centered cubic structure, wherein The V content is 30%, the Al content is 15%, the C content is 55%, and the diameter of the nanocrystal is controlled to be 10nm.

[0042] The preparation method of this protective coating is as follows:

[0043] (1) the same as the step (1) of the preparation method described in Example 1;

[0044] (2) the same as the step (2) of the preparation method described in Example 1;

[0045] (3) the same as the step (3) of the preparation method described in Example 1;

[0046] (4) Introduce argon and CH into the coating chamber 4 , keeping the partial pressure of argon at 0.9Pa, CH 4 The partial pressure is 0.15Pa, the cathode magnetron source is V 2 AlC composite target, the DC c...

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Abstract

The invention provides a hard and tough anti-friction protection coating on the surface of a base body. The coating is composed of elements of V, Al and C; Al atoms are dissolved in a VC crystal lattice in a solid state, and a nano-columnar crystal VAlC of a face-centered cubic structure is mainly formed, wherein the content of V is 30-40%, the content of Al is 15-20%, the content of C is 40-55%, and the diameter of the nano crystal VAlC is 10-20 nm. The coating is a hard and tough anti-friction hard coating, adhesion between abrasive dust and the base body is lowered, and the service life of the base body is prolonged. The invention furthermore provides a preparation method of the coating. A direct-current magnetic control sputtering method is adopted, V2AlC is served as the target material, the carbon ingredient is regulated through the gas CH4, the coating structure of the VAlC is adjusted, and the nano-columnar crystal VAlC coating with tiny crystal particles is formed.

Description

technical field [0001] The invention belongs to the technical field of material surface coating, and in particular relates to a hard and tough wear-reducing protective coating on the surface of a substrate and a preparation method thereof. Background technique [0002] The manufacturing industry is an important pillar industry that is related to the country's strategic position and reflects the comprehensive strength. With the development of advanced manufacturing industry, the processing conditions are gradually harsh and the wide application of many viscous materials such as titanium alloys and nickel alloys has a negative impact on traditional hard alloys or high-speed Steel knives present great challenges. [0003] Traditional PVD ceramic tool coatings such as TiC and TiN have been widely used as protective coatings to improve the processing efficiency of alloys, and subsequent coatings such as TiCN, AlTiN, CrAlN, and TiAlCN have been developed and applied. However, due...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/35C23C14/06C23C14/16
CPCC23C14/0635C23C14/165C23C14/35
Inventor 柯培玲汪爱英王鑫张栋王振玉
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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