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A kind of TA-C base multilayer wear-resistant cutting tool coating and preparation method thereof

A ta-c, wear-resistant layer technology, applied in the field of tetrahedral amorphous carbon (ta-c) based composite tool coating and its preparation, can solve the problems of stress concentration at the interface, easy peeling failure, etc., to reduce the film Base stress concentration, reducing the distribution of large particles on the surface, and the effect of dense and smooth coating surface

Active Publication Date: 2022-06-21
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the transition layer cannot effectively play the role of bonding, it can cause stress concentration at the interface, and it is easy to peel off and fail during cutting

Method used

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  • A kind of TA-C base multilayer wear-resistant cutting tool coating and preparation method thereof
  • A kind of TA-C base multilayer wear-resistant cutting tool coating and preparation method thereof
  • A kind of TA-C base multilayer wear-resistant cutting tool coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) A commercially purchased YG6 tungsten carbide tool was used as a sample (tool material composition, WC: 94wt.%, Co: 6wt.%, hardness HRA89); the samples were ultrasonically cleaned with acetone and anhydrous ethanol for 20 min, and removed Surface oil and its oxides;

[0035] (2) Use a vacuum cleaner to absorb the impurity particles and fine dust in the vacuum chamber, place the tool holder on the turret, turn on the vacuum unit, and wait until the vacuum degree of the chamber reaches 3.0×10 -3 When Pa, the magnetron rectangular Cr target was turned on, the target power was adjusted to 200W, and the sputtering was performed for 10min. This step can eliminate the influence of the excess charge in the cavity and the contamination of the fixture surface causing the poor film quality;

[0036] (3) Ion etching cleaning of the sample: the tool sample is supported on the turret 7, and the vacuum degree of the cavity is pumped to 3.0×10 - 3 Pa, the rotation speed of the s...

Embodiment 2

[0042] (1) Purchase commercial micro-drills with different grades of cutting diameter, and use petroleum ether, acetone, and anhydrous ethanol for ultrasonic cleaning for 10 minutes in turn. After sonication, the sample was taken out and purged with dry nitrogen;

[0043] (2) Use a high-power vacuum cleaner to clean up particulate impurities, target surface pollutants, and sample turret impurities in the cavity, place the tool holder on the turret, turn on the vacuum unit, and wait until the cavity vacuum reaches 3.0×10 -3 When Pa, turn on the magnetron rectangular Cr target, adjust the target power to 200W, and sputter for 10 minutes;

[0044] (3) Put the cleaned micro-drill into the clamping set, and vacuum the cavity bottom to 3.0×10 -3 Below Pa, the temperature is set to 150°C, then 100sccm / min argon gas is passed into the cavity, the bias voltage is -300V, and the glow discharge of Ar ions is used for cleaning for 30min;

[0045] (4) Preparation of substrate bonding lay...

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Abstract

The invention relates to a magnetron sputtering-multi-arc ion plating coupling process to deposit a tool coating. The disclosed coating consists of a metal bonding layer, a ta-c functional wear-resistant layer and a surface diamond-like layer. The present invention uses metal Cr targets and graphite targets as raw materials, and the system structure of the film layer is as follows: (1) The metal Cr layer serves as a bonding layer with the substrate, and at the same time provides strong adhesion strength for the ta-c functional layer; ( 2) The periodic continuous plating of the ta-c functional layer provides good lubricity during the cutting process; (3) The plating of the surface diamond-like carbon (DLC) film mainly serves to reduce surface roughness and pinning effect, Improve the wear resistance of the film layer system. The ta-c-based multilayer wear-resistant coating prepared by the coupling coating process in the present invention can significantly improve wear resistance and reduce adhesion behavior during cutting, and is especially suitable for high-precision cutting conditions.

Description

technical field [0001] The invention relates to a method for preparing a tool coating, in particular to a tetrahedral amorphous carbon (ta-c)-based composite tool coating and a preparation method thereof, belonging to the technical field of tool coating preparation. Background technique [0002] With the continuous progress of modern machining technology, traditional tools have been difficult to meet the high standard processing requirements. When traditional tools perform high-speed machining, large feed, and large depth of material removal, it is easy to cause rapid tool wear, low life, poor machining accuracy, and severe thermal deformation of tools and parts. The advent of coated tools, which combine high-strength substrates with wear-resistant hard film materials, has played a very important role in the improvement of tool cutting performance and the advancement of processing technology. The hard film not only retains the excellent mechanical properties of the base mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/02C23C14/06C23C14/32C23C14/35C23C14/50
CPCC23C14/021C23C14/325C23C14/352C23C14/505C23C14/0605C23C14/025
Inventor 王晓波陈庆春李维民赵改青张广安
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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