Preparation method of tool surface coating and prepared coating

A surface coating and coating technology, applied in the direction of coating, superimposed layer plating, metal material coating process, etc., can solve the problems of insufficient hardness of DLC coating, reduced tool life, high coating hardness, etc., to achieve Small friction coefficient, reduced friction, uniform surface effect

Active Publication Date: 2017-05-10
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Diamond-like carbon film (Diamond-like carbon films, referred to as DLC film) as a new type of hard film material has a series of excellent properties, such as high hardness, high wear resistance, high thermal conductivity, high resistivity, etc., has good Application prospect, but the coating has high hardness and is easy to fall off, which reduces the service life of the tool
In addition, in some occasions, the hardness of the DLC coating is not enough, and it is easy to wear and damage when dealing with hard materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method for a CrN-CrAlSiN-DLC coating on the surface of a cemented carbide blade, comprising the steps of:

[0032] 1. Cleaning and drying of the carbide insert substrate

[0033] The surface of the blade substrate is polished to a roughness value of Ra=0.05 μm, then cleaned by an ultrasonic cleaner, and then dried in a constant temperature drying oven at a temperature of 120°C.

[0034] 2. Cleaning of carbide insert substrate

[0035] The blade substrate is placed in the magnetron sputtering chamber, and the air pressure is pumped to 6×10 -5 After being under Pa, the substrate is heated to a suitable temperature, and then argon gas is passed through, and a bias voltage of 220V is applied under a pressure of 3Pa, and the tool substrate is cleaned by argon ions for 20 minutes.

[0036] 3. Sputtered CrN coating

[0037] Argon gas was introduced into the magnetron sputtering chamber, the pressure was 2.5Pa, a bias voltage of 220V was applied, the sputtering...

Embodiment 2

[0053] A preparation method for a CrN-CrAlSiN-DLC coating on a tool surface, comprising the steps of:

[0054] 1. Cleaning and drying of the carbide insert substrate

[0055] The surface of the tool substrate is polished to a roughness value of Ra=0.05 μm, then cleaned by an ultrasonic cleaner, and then dried in a constant temperature drying oven at a temperature of 180°C.

[0056] 2. Cleaning of carbide tool substrates

[0057] The tool substrate is placed in the magnetron sputtering chamber, and the air pressure is pumped to 6×10 -5 After being under Pa, the substrate is heated to a suitable temperature, and then argon gas is passed through, and a bias voltage of 210V is applied under a pressure of 2Pa, and the tool substrate is cleaned by argon ions for 25 minutes.

[0058] 3. Sputtered CrN coating

[0059] Argon gas was introduced into the magnetron sputtering chamber, the pressure was 2.5Pa, a bias voltage of 220V was applied, the target was made of CrN alloy, and the ...

Embodiment 3

[0067] A preparation method for a CrN-CrAlSiN-DLC coating on a tool surface, comprising the steps of:

[0068] 1. Cleaning and drying of the carbide insert substrate

[0069] The surface of the tool substrate is polished to a roughness value of Ra=0.06 μm, then cleaned by an ultrasonic cleaner, and then dried in a constant temperature drying oven at a temperature of 200°C.

[0070] 2. Cleaning of carbide tool substrates

[0071] The tool substrate is placed in the magnetron sputtering chamber, and the air pressure is pumped to 6×10 -5 After being lowered to Pa, the substrate is heated to a suitable temperature, and then argon gas is passed through, and a bias voltage of 200V is applied under a pressure of 3Pa, and the tool substrate is cleaned by argon ions for 20 minutes.

[0072] 3. Sputtered CrN coating

[0073] Argon gas was introduced into the magnetron sputtering chamber, the pressure was 2.0Pa, a bias voltage of 220V was applied, the target was made of CrN alloy, and...

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Abstract

The invention discloses a preparation method of a tool surface coating and the prepared coating. The preparation method comprises the following steps: 1) cleaning the surface of a tool; 2) sputtering a CrN coating on the surface of the tool, wherein a target material is CrN alloy; 3) sputtering a CrAlSiN coating on the surface of the tool sputtered with the CrN coating, wherein a target material is CrAlSiN alloy, and the sputtering environment is an argon environment; 4) preparing a DLC coating on the surface of the tool treated in the step 3) to obtain a purpose coating. The preparation method of the tool surface coating and the prepared coating, disclosed by the invention, have the benefits that by utilizing a CrN transition layer, the bonding strength between the CrAlSiN coating and a tool substrate is increased; by utilizing an amorphous layer formed between the DLC coating and the CrAlSiN coating, the bonding strength between the DLC coating and the CrAlSiN coating is increased; a gradient coating with high hardness, high wear resistance and high bonding strength is formed on the surface of the hard alloy tool, so that the falling-off problem of the DLC coating in the use process of the tool is effectively solved , the friction between the tool and a workpiece material is reduced, and the service life of the coated tool is prolonged.

Description

technical field [0001] The invention belongs to the field of chemical materials, and in particular relates to a method for preparing a tool surface coating and the prepared coating. Background technique [0002] As a chemical barrier and thermal barrier, the coating reduces the diffusion and chemical reaction between the tool and the workpiece, thereby reducing the wear of the tool. Therefore, most cutting tools use coating technology to improve their performance. The material used for the coating must have high hardness, good wear resistance, stable chemical properties, no chemical reaction with the workpiece material, heat resistance and oxidation resistance, and firm adhesion to the substrate. Diamond-like carbon film (Diamond-like carbon films, referred to as DLC film) as a new type of hard film material has a series of excellent properties, such as high hardness, high wear resistance, high thermal conductivity, high resistivity, etc., has good The application prospect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/35C23C16/26C23C28/04
CPCC23C14/0641C23C14/352C23C16/26C23C28/044C23C28/046
Inventor 张磊周洋张锡健
Owner SHANDONG UNIV
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