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Self-lubricating hard nanocomposite laminated coating and preparation method thereof

A multi-layer coating, nano-composite technology, applied in the direction of coating, metal material coating process, layered products, etc.

Inactive Publication Date: 2010-04-28
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the plasma arc scanning strengthening is adopted, the strengthening energy is mainly concentrated on the outer surface of the coating, and the energy obtained by the transition layer combined with the coating-substrate is still relatively small, so other methods are yet to be adopted to greatly improve the coating binding force.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Coating TiN / (TiAlN+MoS on the surface of cemented carbide blade 2 ) Nanocomposite multilayer coating

[0028] A method for preparing a self-lubricating hard nanocomposite multilayer coating of a cemented carbide blade includes the following steps:

[0029] (1) Pretreatment of cemented carbide blades: Put the blades in an alkaline metal cleaning solution and boil the surface for 30 minutes to remove oil; place the blades in an ultrasonic cleaning machine (frequency 40kHz) containing alkaline metal cleaning solutions at room temperature for ultrasonic treatment 5 minutes; put the cleaned blade into a pure ethanol solution for dehydration and place it in an oven at 120°C for 60 minutes.

[0030] (2) Pre-heating of cemented carbide blades: Put the pre-processed blades into the BD 802 088 BE vacuum coating furnace produced by Balzers, and vacuum up to 5×10 -3 After Pa, add Ar gas to maintain a vacuum of 2.3×10 -1 Pa, start the HCD electron gun and auxiliary auxiliary resi...

Embodiment 2

[0037] Example 2 TiN / (TiCN+MoS) is coated on the surface of high-speed steel milling cutter 2 ) Nanocomposite multilayer coating

[0038] A method for preparing a self-lubricating hard nano-composite multilayer coating of a high-speed steel milling cutter includes the following steps:

[0039] (1) Surface pretreatment of the milling cutter: Place the milling cutter in an alkaline metal cleaning solution and boil the surface for 120 minutes to degrease; place the milling cutter in an ultrasonic cleaning machine (frequency 40kHz) filled with alkaline metal cleaning solution at room temperature. Treatment for 14 minutes; put the cleaned milling cutter into a pure ethanol solution for dehydration and place it in an oven at 120°C for 60 minutes.

[0040] (2) Milling cutter preheating: Load the pre-treated milling cutter into the BD 802 088 BE vacuum coating furnace produced by Balzers, and the vacuum reaches 5×10 -3 After Pa, add Ar gas and maintain the vacuum pressure at 4.0×10 -1 Pa, st...

Embodiment 3

[0047] Example 3 Surface treatment of cold work die steel SKD1 alloy substrate

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Abstract

The invention discloses a self-lubricating hard nanocomposite laminated coating and a preparation method thereof. The gradient nanocomposite laminated coating is characterized in that TiN serves as a binding layer on a hard alloy or iron basal body, a transition layer TiN film and a metal ceramic compound +MoS2 nanocomposite multilayer form a composite multilayer coating of which the structure isTiN / metal ceramic compound +MoS2 nanocomposite; the metal ceramic compound is TiCn or TiAlN. The coating preparation method comprises the following steps: preheating workpieces, cleaning and etching workpiece surface, preparing a transition layer, preparing nanometer multilayer (metal ceramic compound +MoS2) and the like. The invention adopts the technology of physical vapor deposition to preparea self-lubricating coating with TiN / (metal ceramic compound +MoS2) nanocomposite structure and keeps the favourable performance of TiCN and TiAlN compound; meanwhile, the coating has lower friction coefficient, coating hardness is higher than 28 GPa, and the friction coefficient of the coating is lower than 0.1.

Description

Technical field [0001] The present invention relates to a high-temperature wear-resistant anti-friction material, in particular to a self-lubricating hard nanocomposite multilayer coating and a preparation method thereof, in particular to TiN / (metal ceramic compound + MoS prepared by physical vapor deposition technology) 2 ) Nanocomposite multilayer coating method, wherein the cermet compound is TiCN or TiAlN. Background technique [0002] Traditional solid self-lubricating materials such as graphite, polytetrafluoroethylene, pure MoS 2 The use temperature of etc. is lower than 300℃. Many important parts and components in the fields of machinery, electronics, aerospace and energy require their surfaces to have low friction coefficient and high wear resistance and corrosion resistance in high temperature, load-bearing conditions and even vacuum environments, such as molds in the field of machining , Gears and bearings in mechanical transmission. Demands in these fields have promo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/04C23C14/30C23C14/32C23C14/06C23C14/18
Inventor 彭继华
Owner SOUTH CHINA UNIV OF TECH
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