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MoTiCrWN composite coating attached to surface of piston ring, piston ring and preparation method thereof

A composite coating, piston ring technology, applied in coating, metal material coating process, ion implantation plating, etc., can solve the problem of thick vapor deposition coating, high cost, unsatisfactory gas nitriding, and unfriendly chrome plating and other problems, to achieve the effect of promoting technology promotion, enhancing performance and service life, and saving production costs

Active Publication Date: 2020-03-27
LINGNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and deficiencies in the prior art that chrome plating is not environmentally friendly, gas nitriding cannot meet the performance requirements of the engine, and the vapor deposition coating is thicker and costly, and provides a method for preparing adhesive coatings using physical vapor deposition methods. The thinner MoTiCrWN composite coating on the surface of the piston ring makes the piston ring have good wear resistance and self-lubrication performance

Method used

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  • MoTiCrWN composite coating attached to surface of piston ring, piston ring and preparation method thereof
  • MoTiCrWN composite coating attached to surface of piston ring, piston ring and preparation method thereof

Examples

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Embodiment 1

[0036] Embodiment 1 A kind of piston ring containing MoTiCrWN composite coating

[0037] Prepare the piston ring containing the MoTiCrWN composite coating as follows:

[0038] S1. Clamp the piston ring substrate with a clean surface on the workpiece frame, control the temperature at 250°C, heat and degas for 4 hours, perform plasma etching on the piston ring substrate, and then use the arc evaporation system, under nitrogen environment, The degree of vacuum is 1Pa, the temperature is 250°C, and the bias voltage is -100V. The CrW target with a Cr atomic mass percentage of 95% is opened, and a CrWN transition layer with a thickness of 1 μm is deposited on the piston ring substrate;

[0039] S2. Adjust the vacuum degree to 2Pa, the temperature to 250°C, and the bias voltage to -80V, open the first MoTi alloy target with a Ti atomic substance percentage of 5%, and deposit MoTiN / CrWN with a thickness of 3 μm on the CrWN transition layer functional layer;

[0040] S3, turn off the...

Embodiment 2

[0041] Embodiment 2 A kind of piston ring containing MoTiCrWN composite coating

[0042] Prepare the piston ring containing the MoTiCrWN composite coating as follows:

[0043] S1. Clamp the piston ring substrate with a clean surface on the workpiece frame, control the temperature at 200°C, heat and degas for 2 hours, perform plasma etching on the piston ring substrate, and then use the arc evaporation system, under nitrogen environment, The vacuum degree is 0.5Pa, the temperature is 200°C, and the bias voltage is -40V. The CrW target with a Cr atomic mass percentage of 90% is opened, and a CrWN transition layer with a thickness of 2 μm is deposited on the piston ring substrate;

[0044] S2. Adjust the vacuum degree to 1Pa, the temperature to 200°C, and the bias voltage to -40V, open the first MoTi alloy target with a Ti atomic substance percentage of 10%, and deposit MoTiN / CrWN with a thickness of 4 μm on the CrWN transition layer functional layer;

[0045] S3. Turn off the ...

Embodiment 3

[0046] Embodiment 3 A kind of piston ring containing MoTiCrWN composite coating

[0047] Prepare the piston ring containing the MoTiCrWN composite coating as follows:

[0048]S1. Clamp the piston ring substrate with a clean surface on the workpiece frame, control the temperature at 250°C, heat and degas for 3 hours, perform plasma etching on the piston ring substrate, and then use the arc evaporation system, under nitrogen environment, The vacuum degree is 0.8Pa, the temperature is 220°C, and the bias voltage is -70V. The CrW target with a Cr atomic mass percentage of 88% is opened, and a CrWN transition layer with a thickness of 1.5 μm is deposited on the piston ring substrate;

[0049] S2. Adjust the vacuum degree to 1.5Pa, the temperature to 220°C, and the bias voltage to -60V, open the first MoTi alloy target with a Ti atom content of 8%, and deposit MoTiN / CrWN with a thickness of 2 μm on the CrWN transition layer functional layer;

[0050] S3. Turn off the CrW target an...

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Abstract

The invention belongs to the field of engine accessory surface treatment, and particularly relates to a MoTiCrWN composite coating attached to the surface of a piston ring, the piston ring and a preparation method thereof. The composite coating is formed by combining a CrWN transition layer, a MoTiN / CrWN functional layer and a MoTiN surface layer, and the layers are supported by one another and jointly act to guarantee the hardness, the lubricating degree and the abrasion resistance of the piston ring, improve the use performance of the piston ring and prolong the service life of the piston ring. By adopting an electric arc evaporation system, a uniform and thinner coating is favorably formed, the total thickness of the coating is obviously reduced, the requirements on process operation and equipment are reduced, the production cost is saved, and the technical popularization is facilitated.

Description

technical field [0001] The invention belongs to the field of surface treatment of engine accessories, and more specifically relates to a MoTiCrWN composite coating attached to the surface of a piston ring, a piston ring and a preparation method thereof. Background technique [0002] Piston rings are metal rings used to embed in piston grooves, and are widely used in various power machinery, such as steam engines, diesel engines, gasoline engines, compressors, hydraulic machines, etc. Moreover, the piston ring is the core component inside the engine, which affects the efficiency, load, speed and life of the engine, and is one of the main factors affecting the performance of the engine. [0003] At present, the performance of piston rings is generally improved by surface technology, such as electroplating chromium, gas nitriding, physical vapor deposition coating treatment, etc. Among them, chrome plating on the surface can significantly improve the wear resistance of the pis...

Claims

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Application Information

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IPC IPC(8): C23C14/32C23C14/06C23C14/02
CPCC23C14/0021C23C14/022C23C14/0641C23C14/325
Inventor 田灿鑫邹长伟王泽松谢伟
Owner LINGNAN NORMAL UNIV