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Chromium-based ceramic composite plating process for piston ring

A ceramic composite and piston ring technology, applied in electrolytic inorganic material coating, electrolytic process, electrolytic components, etc., can solve problems such as cylinder scuffing, achieve the effects of improving lubrication conditions, reducing friction loss, and high wear resistance

Inactive Publication Date: 2021-11-02
长沙正圆动力科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] With the continuous improvement of engine emission levels, traditional chrome-plated piston rings are prone to cylinder scuffing in the working environment of high heat load and low oil consumption

Method used

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  • Chromium-based ceramic composite plating process for piston ring
  • Chromium-based ceramic composite plating process for piston ring
  • Chromium-based ceramic composite plating process for piston ring

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Embodiment Construction

[0103] see Figure 1~3 , in the embodiment of the present invention, the piston ring chromium-based ceramic composite plating process includes the following steps:

[0104] Step 1: clamping, sealing, cleaning

[0105] S1: Receive the corresponding clamping fixture;

[0106] S2: Put the demagnetized piston ring on the special angle iron to straighten the piston ring opening;

[0107] S3: Place the piston ring whose opening alignment height is equal to the clamping length of the shaft on the mandrel in the semicircular tile;

[0108] S4: Use a special tool to apply varnish to the opening gap of the piston ring, then stagger the opening of the piston ring by about 90°, open the pneumatic valve, put the corresponding nut on the mandrel, and tighten it with a wrench;

[0109] S5: Move the shaft with the piston ring to the bracket, brush the varnish on the surface of the piston ring with an iron brush, and wipe the opening with cotton gauze dipped in acetone within 45°, and wipe ...

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Abstract

The invention relates to the technical field of piston ring coatings, in particular to a chromium-based ceramic composite plating process for a piston ring. The process aims to solve the problem that a traditional piston ring is prone to cylinder scoring, and specifically comprises eight steps. A chromium-based ceramic composite coating contains 2% to 6% (volume) of ceramic particles (Al2O3) and 40 to 100 microcracks / mm, a hardness of the coating is as high as 800 HV0.1 to 1200 HV0.1, the microcracks are good in oil storage performance, a lubricating condition is improved, friction loss is reduced, the coating has high wear resistance, service life of the piston ring with the coating is more than 5 times service life of a common chromium-plated piston ring, and the problems that a traditional piston ring is prone to wear and cylinder scoring are effectively solved.

Description

technical field [0001] The invention relates to the technical field of piston ring plating, in particular to a chromium-based ceramic composite plating process for piston rings. Background technique [0002] The piston ring is a metal elastic ring with a large outward expansion deformation. It is assembled into the section and its corresponding annular groove. The reciprocating and rotating piston ring depends on the pressure difference of gas or liquid, It forms a seal with the cylinder and one side of the ring and the ring groove. In order to improve the performance of the piston ring, it is generally necessary to carry out chrome plating on its surface. The existing chromium plating process uses sulfate as a catalyst, and the basic component of the plating solution is chromium Anhydride and sulfuric acid, CrO3:H2SO4=100:1, with the workpiece (piston ring) as the cathode and lead alloy as the anode, a thin layer of hard chromium is plated on the outer surface of the piston...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D7/04C25D5/34C25D5/50C25D5/52C25D9/04C25D17/00C25D17/06
CPCC25D7/04C25D5/34C25D5/52C25D5/50C25D9/04C25D17/06C25D17/00
Inventor 邓章礼王四春张立国
Owner 长沙正圆动力科技有限责任公司
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