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A preparation method of tungsten-containing self-lubricating tool coating

A self-lubricating and coating technology, applied in coating, sputtering, vacuum evaporation coating and other directions, can solve the problems of complex preparation process, strong hygroscopicity, increased friction coefficient and wear rate, etc., to achieve broad application prospects, The effect of increasing surface hardness and reducing residual stress

Active Publication Date: 2019-04-16
SHENZHEN KINGMAG PRECISION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Chinese patent (patent number: ZL200710017202.7) discloses a chromium-doped amorphous graphite anti-friction coating, the coating has a hardness of only 1500HV-2200HV and a thickness of 1.0μm-1.5μm, which is not suitable for use as a coating for high-speed cutting tools
Chinese patent (application number: 200610068975.3) reported a self-lubricating soft coating tool coating, the coating material is composed of Ti, Zr and MoS2 layers, the preparation process is more complicated, and its lubricating medium is MoS2, its disadvantage is strong hygroscopicity , the friction coefficient and wear rate will rise sharply at a certain relative humidity, and the application range has certain limitations

Method used

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Effect test

Embodiment 1

[0028] Embodiment 1 of the present invention: a method for preparing a tungsten-containing self-lubricating tool coating, the tool: extrusion tap, material: W6Mo5Cr4V2 high-speed steel, comprising the following steps:

[0029] S100: pretreatment, remove the pollutants on the tool, and make the surface of the tool clean and dry. Specifically, the tool is first placed on the cleaning rack, and then undergoes ultrasonic degreasing, activation, surface adjustment, dehydration and drying in order to remove the oil and scale on the surface of the tool. ;

[0030] S200: put on the hanger and vacuumize, place the tool on the hanger, place the hanger in the vacuum chamber of the ion coating equipment, the vacuum chamber has a tungsten target and a graphite target, and vacuum the vacuum chamber to: 3 ×10 -5 Torr, there are two tungsten targets and two graphite targets in the vacuum chamber, and the hanger is a three-axis linkage hanger;

[0031] S300: Ion cleaning, inject sputtering ...

Embodiment 2

[0036]Embodiment 2: A kind of tungsten-containing self-lubricating tool coating preparation method, tool: blade, material: YT14 cemented carbide, comprises the following steps:

[0037] S100: pretreatment, remove the pollutants on the alloy material, and make the surface of the alloy material clean and dry. Specifically, the alloy material is first placed on a cleaning rack, and then undergoes ultrasonic degreasing, activation, surface conditioning, dehydration and drying in sequence to remove oil stains and oxide scales on the surface of the alloy material. ;

[0038] S200: put on the hanger and vacuumize, place the alloy material on the hanger, place the hanger in the vacuum chamber of the ion coating equipment, the vacuum chamber has a tungsten target and a graphite target, and evacuate the vacuum chamber to: 8×10 -5 Torr, there are two tungsten targets and two graphite targets in the vacuum chamber, and the hanger is a three-axis linkage hanger;

[0039] S300: Ion clean...

Embodiment 3

[0044] Embodiment 3: A kind of tungsten-containing self-lubricating tool coating preparation method, tool: drill bit, material: W18Cr4V high-speed steel, comprises the following steps:

[0045] S100: pretreatment, remove the pollutants on the alloy material, and make the surface of the alloy material clean and dry. Specifically, the alloy material is first placed on a cleaning rack, and then undergoes ultrasonic degreasing, activation, surface conditioning, dehydration and drying in sequence to remove oil stains and oxide scales on the surface of the alloy material. ;

[0046] S200: put on the hanger and vacuumize, place the alloy material on the hanger, place the hanger in the vacuum chamber of the ion coating equipment, the vacuum chamber has a tungsten target and a graphite target, and evacuate the vacuum chamber to: 5×10 -5 Torr, there are two tungsten targets and two graphite targets in the vacuum chamber, and the hanger is a three-axis linkage hanger;

[0047] S300: I...

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Abstract

The invention discloses a preparation method of a tungstenic self-lubrication cutter coating. The preparation method comprises the following steps: S100, pretreatment is carried out, since pollutants on an alloy material are removed and the surface of the alloy material are kept clean and dry; S200, the alloy material is placed on a hanging rack and vacuumizing is carried out; S300, ionic cleaning is carried out; S400, tungsten metal is deposited for precoating; S500, a tungsten / carbon transition layer is deposited; and S600, a carbon / tungsten self-lubrication composite coating is deposited. With the adoption of the preparation method, the carbon / tungsten self-lubrication composite coating (the percentage content of tungsten atoms is 5-10%) is formed on the surface of a tungstenic self-lubrication carbon-based coating cutter, and is doped with a nano tungsten carbide phase, so that a continuous solid state lubrication layer having a lubrication function can be formed on the surface of the tungstenic self-lubrication carbon-based coating cutter in a cutting process, and the surface hardness of the tungstenic self-lubrication carbon-based coating cutter can be increased. In addition, a tungsten layer and the tungsten / carbon transition layer are arranged between a cutter substrate of the tungstenic self-lubrication carbon-based coating cutter and the surface carbon / tungsten self-lubrication composite coating, so that the residual stress can be reduced, and the bonding strength of the tungstenic self-lubrication cutter coating and the cutter substrate of can be improved.

Description

technical field [0001] The invention relates to a method for preparing a coating, in particular to a method for preparing a coating for a tungsten-containing self-lubricating tool. Background technique [0002] As a basic industry, the manufacturing industry is undergoing revolutionary changes, and the manufacturing technology has also undergone qualitative changes. Especially in recent years, the application of high-speed cutting technology has greatly improved the quality of products while greatly improving production efficiency. It can be considered that high-speed cutting technology has become the mainstream of cutting manufacturing industry. [0003] The development and application of high-speed cutting technology has also led to the rapid development of related technologies, and high-speed cutting tool technology is one of the key technologies to achieve high-speed machining, and the high-temperature performance of tool materials is the most important thing affecting t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/34C23C14/16C23C14/06C23C14/50C23C14/02
CPCC23C14/022C23C14/0605C23C14/165C23C14/3464C23C14/505
Inventor 文晓斌
Owner SHENZHEN KINGMAG PRECISION TECH