Hard coating cutter modulated in cathode magnetic field as well as preparation method and application thereof

A tool and coating technology, applied in the direction of tools for lathes, tools and coatings for milling machines, etc., can solve the problem of wear resistance, impact resistance and service life of tool substrates, and limit the thickness of hard protective coatings. , large residual compressive stress and other problems, to achieve long cutting life, solve the effect of limited increase in coating thickness and low production cost

Active Publication Date: 2020-12-18
广东华升纳米科技股份有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, the coating prepared by arc ion plating usually has a large residual compressive stress, which limits the thickness of the hard protective coating (usually 1 μm to 6 μm to ensure good film-base bonding), which in turn leads to wear resistance of the tool substrate. , impact resistance and limited service life

Method used

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  • Hard coating cutter modulated in cathode magnetic field as well as preparation method and application thereof
  • Hard coating cutter modulated in cathode magnetic field as well as preparation method and application thereof
  • Hard coating cutter modulated in cathode magnetic field as well as preparation method and application thereof

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preparation example Construction

[0047] The preparation method of cutter is characterized in that, comprises the following steps:

[0048] Provide tool base;

[0049] Depositing a nitride coating on the tool substrate by physical vapor deposition arc ion plating;

[0050] The low-stress layer has high-density "droplet" defects caused by a weak cathode magnetic field, and the high-stress layer has low-density "droplet" defects caused by a strong cathode magnetic field;

[0051] The target central magnetic field strength of the weak cathode magnetic field is 0.01Gs-50Gs, and the target central magnetic field strength of the strong cathode magnetic field is 100Gs-250Gs;

[0052] The density of the high-density "droplet" defects is >0.5 / square micron, and the density of the low-density "droplet" defects is <0.1 / square micron.

[0053] The method for preparing cutting tools in the present invention regulates the distribution of "droplets" in the coating through the cathode magnetic field, and combines the design...

Embodiment 1

[0070] After ultrasonic cleaning and drying of the cemented carbide tool substrate, it is sent into a coating furnace and argon gas is introduced. Under the conditions of a current of 150A, a bias voltage of -200V, and an air pressure of 3.0Pa, the ion source was used to perform ion etching on the tool substrate, and the etching time was 30min. Then adjust the cathode magnetic field, and alternately deposit high and low stress layers under the conditions of target current of 150A, bias voltage of -80V, and gas pressure of 2.0Pa to obtain a multilayer TiAlN coating. Open the TiAl target, when the magnetic field strength in the center of the target is 100Gs, deposit a high-stress TiAlN layer with a thickness of 0.65μm, and the deposition time is 15min; when the magnetic field strength in the center of the target is 20Gs, deposit a low-stress TiAlN layer with a thickness of 0.65μm , the deposition time is 20min. In this way, 8 alternating units are alternately deposited to obtai...

Embodiment 2

[0076] After ultrasonic cleaning and drying of the cemented carbide tool substrate, it is sent into a coating furnace and argon gas is introduced. Under the conditions of a current of 200A, a bias voltage of -300V, and an air pressure of 4.0Pa, the ion source was used to perform ion etching on the tool substrate, and the etching time was 20min. Then adjust the cathode magnetic field, and alternately deposit high and low stress layers under the conditions of target current of 200A, bias voltage of -100V, and gas pressure of 3.0Pa to obtain a multilayer CrAlN coating. Open the CrAl target, when the magnetic field strength in the center of the target is 50Gs, deposit a low-stress CrAlN layer with a thickness of 1.5μm, and the deposition time is 50min; when the magnetic field strength in the center of the target is 200Gs, deposit a high-stress CrAlN layer with a thickness of 0.5μm , the deposition time is 15min. In this way, 6 alternating units are alternately deposited to obtain...

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Abstract

The invention relates to the field of cutters and thin film material preparation, in particular to a hard coating cutter modulated in a cathode magnetic field and a preparation method and applicationthereof. The cutter comprises a cutter base body and a nitride coating which is deposited on the base body and is of a multi-layer structure. The nitride coating is composed of a plurality of alternating units, and alternating units comprise a low-stress layer with the stress ranging from -2 GPa to -5 GPa and a high-stress layer with the stress ranging from -6 GPa to -8 GPa. The thickness of the nitride coating is 8 [mu] m or more. An excellent film-base binding force is formed between the cutter base body and the coating. The invention further provides a preparation method of the cutter, andthe preparation method is simple in process and low in production cost. The prepared cutter can be applied to the field of machining of medium-low carbon steel, cast iron or stainless steel materials.

Description

technical field [0001] The invention relates to the fields of cutting tools and thin film material preparation, in particular to a hard coating tool modulated by a cathode magnetic field and a preparation method and application thereof. Background technique [0002] Modern cutting technology puts forward extremely strict requirements on processing efficiency, so there is an urgent need for a tool with high wear resistance, high impact resistance and long service life. The traditional method is usually to use physical vapor deposition arc ion plating to coat a layer of multi-component nitride hard coating material on the cutting tool. However, the coating prepared by arc ion plating usually has a large residual compressive stress, which limits the thickness of the hard protective coating (usually 1 μm to 6 μm to ensure good film-base bonding), which in turn leads to wear resistance of the tool substrate. , impact resistance and service life are limited. Therefore, under the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/54C23C14/50C23C14/02B23B27/00B23B51/00B23C5/00
CPCC23C14/325C23C14/0641C23C14/54C23C14/505C23C14/022B23B27/00B23B51/00B23C5/00B23B2228/105B23B2224/24B23C2224/24B23C2228/10
Inventor 林海天李立升许雨翔王启民
Owner 广东华升纳米科技股份有限公司
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