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Ti/TiN/TiAlN composite coating on surface of cutting tool material and preparation method of Ti/TiN/TiAlN composite coating

A cutting tool and composite coating technology, applied in the field of materials, can solve the problem that the coating cannot meet the requirements of high wear resistance, high thermal stability and high oxidation resistance mechanical properties, affect the cutting performance and service life of TiN coated tools, and attach Poor focus and other problems, to achieve the effect of alleviating internal stress, improving bonding force and prolonging service life

Inactive Publication Date: 2013-10-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adhesion of TiN thin film to cemented carbide and ceramic tool substrates is poor, and it is easy to fall off from the substrate under the action of cutting force, which seriously affects the cutting performance and service life of TiN coated tools.
With the advent of the era of high-speed cutting, the TiN film can no longer meet the requirements of comprehensive mechanical properties such as high wear resistance, high thermal stability and high oxidation resistance of the coating under high-speed cutting conditions.

Method used

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  • Ti/TiN/TiAlN composite coating on surface of cutting tool material and preparation method of Ti/TiN/TiAlN composite coating
  • Ti/TiN/TiAlN composite coating on surface of cutting tool material and preparation method of Ti/TiN/TiAlN composite coating
  • Ti/TiN/TiAlN composite coating on surface of cutting tool material and preparation method of Ti/TiN/TiAlN composite coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] AIP-01 multi-arc ion coating machine and JGP-560b magnetron sputtering coating machine are used. The multi-arc ion coating machine is manufactured by Shenyang Yuankehang Co., Ltd., and the magnetron sputtering coating machine is manufactured by Shenyang Scientific Instrument Development Center Co., Ltd., Chinese Academy of Sciences. Manufactured by the company, the workpiece used is wire-cut into 10×10×4mm block high-speed steel material (M2 steel).

[0037] (1) Firstly, after the workpiece is mechanically ground and polished, it is cleaned with ultrasonic waves in acetone and alcohol for 15 minutes each, and then dried;

[0038] (2) Put the dried workpiece into the multi-arc ion coating machine, the sample is facing the target source, 150mm away from the target surface, the sample revolves / rotates, and then vacuumizes step by step with a mechanical pump, Roots pump, and diffusion pump to 6.5×10 -3 Pa, the temperature is controlled at 200-230°C, the bias voltage is -70...

Embodiment 2

[0044] The difference between this embodiment and embodiment 1 is that the coating time in step (4) is 15 minutes.

[0045] Figure 4 and Figure 5 They are respectively the cross-section and surface topography diagrams of the composite film prepared on the silicon wafer under the present implementation process observed under the scanning electron microscope.

[0046] The coating thickness is measured by grinding the cross-sectional metallographic sample of the workpiece in Example 2, and measuring it under a scanning electron microscope (SEM). The total thickness of the coating in this example is about 2.8 μm.

Embodiment 3

[0048] The difference between this embodiment and embodiment 1 is:

[0049] The coating time in step (4) is 30 minutes, after the TiN film is plated, ion cleaning is performed for 3 minutes, the bias voltage is -700 volts, the duty cycle is 40%; the current is 70 A, and the voltage is 25 volts.

[0050] The coating thickness is measured by grinding the cross-sectional metallographic sample of the workpiece in Example 3, and measuring it under a scanning electron microscope (SEM). The total thickness of the coating in this example is about 2.9 μm.

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Abstract

The invention discloses a Ti / TiN / TiAlN composite coating on the surface of a cutting tool material and a preparation method of the Ti / TiN / TiAlN composite coating. The method comprises the following steps of: (1) cleaning the surface of the cutting tool material; (2) sequentially coating a Ti layer and a TiN layer through ion coating equipment; and (3) coating a TiAlN layer through magnetron sputtering equipment to obtain the Ti / TiN / TiAlN composite coating. The Ti / TiN / TiAlN composite coating has a relatively smooth surface, and is large in film base binding force and high in abrasion resistance; the service life of a tool can be prolonged; a coating film is high in processing quality; the Ti / TiN / TiAlN composite coating is simple in preparation process, easy to operate and suitable for batch production; automatic electric and mechanical control is adopted in a film coating process.

Description

technical field [0001] The invention relates to the field of materials, in particular to a Ti / TiN / TiAlN composite coating on the surface of a cutting tool material and a preparation method thereof. Background technique [0002] In the machinery manufacturing industry, although various parts forming processes have been developed, most of the mechanical parts are still made by cutting. The coated tool is a combination of the tool substrate and the hard film surface layer. Since the substrate maintains good toughness and high strength, the hard film surface layer has high wear resistance and low friction coefficient; the coated tool can improve processing efficiency. And precision, prolong the service life of the tool, thereby ensuring the quality of the processed workpiece and reducing the processing cost. [0003] Among the many coating technologies, ion plating and magnetron sputtering technologies have been widely used. Arc ion plating has the advantages of high ion energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/06C23C14/22
Inventor 钟喜春张启沛曾德长邱万奇匡同春刘仲武余红雅
Owner SOUTH CHINA UNIV OF TECH
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