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Composite coating for abrasion-resistance and anti-corrosion treatments on surface of machine components and preparation method

A technology for mechanical parts and composite coatings, applied in coatings, chemical instruments and methods, metal material coating processes, etc., can solve problems such as easy failure, easy cracking, falling off, serious pollution, etc., to improve corrosion resistance , Improve the effect of density

Inactive Publication Date: 2010-06-23
董志良 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. Serious pollution, especially the pollution caused by the electrodeposition process;
[0004] 2. It is easy to fail under harsh service conditions. For example, in parts such as piston rods and piston rings, the hard chromium coating is easy to crack and fall off under high load conditions
[0005] 3. Unable to adapt to complex service conditions, such as: under high temperature oxidation conditions, high load, corrosion resistance and other superimposed occasions, traditional hard chrome plating and surface heat treatment often cannot meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] To replace the application of electrodeposited hard chromium plating in hydraulic rods, the following procedures are followed:

[0030] 1. After cleaning and drying the hydraulic rod with an ultrasonic cleaning device, place it on the workpiece rack in the unbalanced magnetron sputtering device;

[0031] 2. The vacuum system works so that the pressure in the vacuum chamber is 1×10 -3 Pa;

[0032] 3. Heat the hydraulic rod to 200°C and keep it warm for 0.5 hours, and use plasma cleaning to further clean the rod while keeping it warm;

[0033] 4. Introduce argon gas into the vacuum chamber, adjust the pressure of the vacuum chamber to 0.1-1Pa, use the unbalanced magnetron sputtering source, use Cr as the target material, and deposit a Cr film of 0.2 μm;

[0034] 5. Introduce nitrogen and argon into the vacuum chamber, keep the pressure of the vacuum chamber constant, use non-equilibrium magnetron sputtering, in Ar:N 2 CrN thin film of 6 μm is plated under the condition...

Embodiment 2

[0037] To replace the application of surface heat treatment technology in stamping dies, that is, punches, the operation is as follows:

[0038] 1. After cleaning and drying the punch with an ultrasonic cleaning device, place it on the workpiece rack in the unbalanced magnetron sputtering device;

[0039] 2. The vacuum system works and the pressure in the vacuum chamber is 1×10 -3 Pa;

[0040] 3. Heat the punch to 200°C and keep it warm for 0.5 hours, and use plasma cleaning to further clean the punch while keeping warm;

[0041] 4. Introduce argon gas into the vacuum chamber, adjust the pressure of the vacuum chamber to 0.1-1Pa, and deposit a Cr film of 0.1 μm by using an unbalanced magnetron sputtering source;

[0042] 5. Introduce nitrogen and argon into the vacuum chamber, keep the pressure of the vacuum chamber constant, use unbalanced magnetron sputtering, use Al and Cr targets, and use Ar:N 2 CrAlN thin film 4μm was deposited under the condition of volume flow ratio ...

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Abstract

The invention discloses a composite coating for abrasion-resistance and anti-corrosion treatments on the surface of machine components and a preparation method thereof, which is characterized in that: the composite coating has a double layer structure, the surface layer of the double layer structure is a function layer, and a transition layer is arranged between the function layer and the surface of a component; the transition layer is a pure metal layer such as Cr layer, Ti layer or Ni layer; the function layer is a carbide layer MC, a nitride layer MN or a carbonitride layer MNC, wherein M is transition metal such as Ti, Al, Zr or Mo. The invention prepares the composite coating on the surface of the machine components under the requirements of abrasion-resistance and anti-corrosion by an unbalanced magnetron sputtering method of the physical vapor deposition. The composite coating has better performance in comparison with electrodeposited hard chromium, and has remarkable advantage in environment protection.

Description

technical field [0001] The invention relates to a composite coating applied on the surface of mechanical parts with wear-resistant and corrosion-resistant requirements and a preparation method thereof. Wear and corrosion resistance. Background technique [0002] Parts made of metal materials such as steel, non-ferrous metals, and cast iron are the main components of industrial equipment, tools, and molds. With economic development and technological progress, the requirements for the surface properties of various mechanical parts, especially corrosion resistance and wear resistance, are getting higher and higher. Traditionally, the electrodeposition method is used to plate hard chromium and Ni on the surface of the part, or the surface heat treatment method is used to treat the surface of the part. These methods partially meet the performance requirements of the part, but there are the following disadvantages: [0003] 1. Serious pollution, especially the pollution caused b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/04C23C14/35
Inventor 王君
Owner 董志良
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