CN201439816U

CN201439816U - Piston ring with nitration layer and chromium-ceramic composition plating layer

Info

Publication number: CN201439816U
Application number: CN2009201864689U
Authority: CN
Inventors: 张洪涛; 孙丛宝; 殷小飞; 程伟胜
Original assignee: Anqing TP Goetze Piston Ring Co Ltd
Current assignee: Anqing TP Goetze Piston Ring Co Ltd
Priority date: 2009-07-18
Filing date: 2009-07-18
Publication date: 2010-04-21
Anticipated expiration: 2019-07-18

Abstract

The utility model discloses a piston ring with a nitration layer and a chromium-ceramic composition plating layer. The piston ring comprises a piston ring basal body, wherein the nitration layer is arranged on the surface of the basal body; a composite chrome layer is arranged on the nitration layer at the excircle surface of the basal body; and the grids of the composite chrome layer are inlayed with Al2O3 rigid grains with the sizes being 2-10mum. The abrasion resistance of the excircle surface and the side surface is more than two times of the common treatment ring, thereby solving the problems that the abrasion of the excircle ring of a common nitration ring is big and the side surface of a common chrome plating ring is abraded seriously. Therefore, the piston ring is better suitable for the requirements on the limit for high output and high emission of modern cars and is also applicable to various diesel engines and gasoline engines.

Description

A kind of nitride layer and chromium-Ceramic Composite plating coating piston ring of having

One, technical field:

The utility model relates to a kind of piston ring, is specifically related to a kind of nitride layer and chromium-Ceramic Composite plating coating piston ring of having.

Two, background technique:

At present at home and abroad on the market the topmost surface treatment mode of steel piston ring have two kinds: chromium plating processing and nitriding treatment.But along with the rotating speed of motor car engine is more and more faster, output torque is increasing, and is more and more higher to the requirement of motor vehicle emission simultaneously, and all there is this very big defective in two kinds of above-mentioned steel loop surface treatment modes.It is big that the side of chrome plated piston ring does not have coating abrasion; Nitrogenize piston ring side is protected but the cylindrical working surface wears no resistance, and causes pull-cylinder phenomena easily.So need the new surface treatment mode of invention to solve the defective of chrome plated piston ring and the existence of nitrogenize piston ring.

Three, summary of the invention:

What technical problem to be solved in the utility model provided a kind of requirement that more adapts to the high output of Hyundai Motor, maximum discharge restriction has nitride layer and a chromium-Ceramic Composite plating coating piston ring, guarantees that promptly the high wear resistance of the side of piston ring has improved the wear-resisting property of cylindrical working surface again.

For solving the problems of the technologies described above, of the present utility modelly have nitride layer and technological scheme that chromium-Ceramic Composite plating coating piston ring is adopted is such: it comprises the piston ring matrix, this matrix surface is provided with nitride layer, be provided with again on the nitride layer of matrix periphery at reticulate pattern, be inlaid with the Al that is of a size of 2～10 μ m in this reticulate pattern ₂O ₃The compound chromium layer of hard particles.Realized that successfully piston ring excircle face and side all reach high-wear resistance, and the chromium layer of reticulate structure there is good oil storage function, can strengthens the tension cylinder performance of ring, prolonged the working life of ring and cylinder sleeve widely.Therefore, the utility model can adapt to the requirement of the high output of Hyundai Motor, maximum discharge restriction.

Four, description of drawings:

Fig. 1 is a partial section of the present utility model;

Fig. 2 is that the utility model coating is amplified 200 times structural drawing;

Fig. 3 is that the utility model periphery coating amplifies 1000 times structural drawing.

Five, embodiment:

Referring to Fig. 1, Fig. 2, Fig. 3, of the present utility modelly have nitride layer and chromium-Ceramic Composite plating coating piston ring comprises piston ring matrix 1, matrix 1 surface is provided with nitride layer 2, be that side and periphery all have nitride layer 2, be provided with compound chromium layer 3 on the nitride layer of matrix 1 periphery again, this compound chromium layer 3 comprises reticulate pattern 4 and inlay the Al that is of a size of 2～10 μ m in reticulate pattern 4 ₂O ₃Hard particles.

Nitride layer 2 is the coatings that adopt the principle generation of gas nitriding, its thickness 10～90um, hardness 800～1300HV.

Compound chromium layer 3 is to adopt electrochemical method and the special electric mode of giving to deposit the chromium-pottery-coating (being the CKS coating) of formation again on the nitride layer of piston ring excircle face.Implementation methods: in the process of chromium deposition with Al ₂O ₃Hard particles is inlaid in the reticulate pattern 4.So-called specially is interpreted as for electric mode: in plating tank, alternately to apply " positive current → reverse current → stop to " this mode of alternately giving electricity to electroplating piston ring.The feature of compound chromium layer is as follows: Al ₂O ₃ Particle diameter size 2～10 μ m, Al ₂O ₃The percent by volume of particle in chrome coating is 2～6%, 40～100/MM of reticulate pattern fine fisssure density.Compound chromium layer thickness is 10～100um, and hardness is 900～1400HV.Technical characterstic: the abrasion resistance properties height, the equal wear extent of 1000km is the over half of common nitrogenize ring.Barrel wear is low, heat-resisting load carrying capacity height.

Claims

1. one kind has nitride layer and chromium-Ceramic Composite plating coating piston ring, comprise the piston ring matrix, it is characterized in that: described matrix (1) surface is provided with nitride layer (2), is provided with in reticulate pattern (4) on the nitride layer of matrix (1) periphery again and is inlaid with the Al that is of a size of 2～10 μ m ₂O ₃The compound chromium layer (3) of hard particles.

2. nitride layer and the chromium-Ceramic Composite plating coating piston ring of having according to claim 1, it is characterized in that: the thickness of described nitride layer (2) is 10～90um.

3. nitride layer and the chromium-Ceramic Composite plating coating piston ring of having according to claim 1, it is characterized in that: the thickness of described compound chromium layer (3) is 10～100um.