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High performance ceramic piston ring manufacturing technology

A high-performance technology for piston rings, applied in the field of surface metallurgy, can solve problems such as stress spalling, brittleness of ceramic coatings, and low bonding strength of the substrate, and achieve strong scratch resistance, good thermal stability, and low friction coefficient. Effect

Inactive Publication Date: 2016-03-02
曾云发
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with this technology is that the ceramic coating is brittle, and there is also an interface with a low bonding strength with the substrate, resulting in stress spalling

Method used

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  • High performance ceramic piston ring manufacturing technology

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Embodiment Construction

[0020] Provide embodiment below in conjunction with accompanying drawing (taking molybdenum metal as example)

[0021] The main power supply 1 outputs 0-1000V for cathode and anode. The cathode seat 7 is connected to the negative terminal of the main power supply 1, and the anode 8 is connected to the positive terminal of the main power supply 1. The bias power supply 2 outputs 0-450V for the bias voltage ring 3 . The vacuum chamber 4 has an argon gas inlet 5 and a vacuum exhaust port 6 . The upper end of the barrel-shaped cathode 9 is open, the ultimate vacuum degree is 8.0Pa, the argon pressure is 30-40Pa; the bias voltage is 240-450v. Gradually increase the voltage of the main power supply to 500-600V, at this time the first sudden change of current occurs and glow occurs; continue to increase the voltage to 600-800V, the second sudden change of current occurs, and the normal glow discharge turns into abnormal glow Discharge produces a high temperature of 800-1000°C. Th...

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Abstract

The invention relates to a high-performance ceramic piston ring manufacturing technology. At present, the existing piston ring surface treatment technologies comprise chromium electroplating, surface nitridation, PVD and CVD film coating, molybdenum plasma spraying and ceramic coating plasma spraying, and have different performance detects and no ideal effects. The high-performance ceramic piston ring manufacturing technology comprises that through a double glow plasma surface metallurgy technology, molybdenum (or chromium or titanium or tungsten) is deeply permeated into the surface layer of a common low-alloy steel piston ring, and through vaccum ion carbonization and follow-up heat treatment, a ceramic piston ring having high hardness, high wear resistance and good comprehensive mechanical performances is obtained.

Description

technical field [0001] The invention belongs to the category of surface metallurgy. Background technique [0002] Piston rings are key components in the heart of internal combustion engines such as automobiles and motorcycles. It accounts for a small proportion of all engine parts, but plays a vital role. The piston ring moves repeatedly in the high-temperature and high-pressure gas medium, resulting in intense friction. The performance of the piston ring directly affects the overall performance of the engine such as power, economy, reliability, fuel efficiency, and exhaust emissions. With the development of modern internal combustion engines in the direction of high efficiency, high load, high speed and long life, higher and higher requirements are put forward for the wear resistance and comprehensive mechanical properties of piston rings. At present, various surface treatment technologies are used at home and abroad to improve the performance of piston rings, mainly inc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/38C23C14/34
Inventor 曾云发
Owner 曾云发