CN204663694U - A kind of high-performance chromium-diamond composite deposite piston ring - Google Patents

Abstract

The utility model discloses a kind of piston ring of high performance chromium-diamond composite deposite, comprise the chromium coating on piston ring excircle face and in layers of chrome, form reticulate structure, in reticulate pattern, embed diamond particles again, and electroplate the composite construction of the thin pure chromium coating of one deck at outermost disc. The utility model piston ring coating has better initial fitting property energy, higher anti-wear performance and heat-resisting load performance, is applicable to the new heavy-duty engine requirement such as supercharging, high heat load better.

Description

A kind of high-performance chromium-diamond composite deposite piston ring

One, technical field:

The utility model relates to a kind of piston ring, is specifically related to a kind of high-performance chromium-diamond composite deposite piston ring.

Two, background technology:

Along with fuel economy index and discharge restriction require more and more higher, automobile engine more trends towards high explosion pressure, high moment of torsion, the design of high heat load direction. The new work engines such as turbocharging, high-pressure common rail, EGR are by more employings and design these new work engine ubiquities: fuel gas temperature is high, gaseous-pressure is large, heat carrying high. Because engine possesses these features, make the condition of work of piston ring become harsher, wearability, anti-scuffing of cylinder bore energy and the resistance to heat absorption ability of piston ring will promote further.

Previously in " a kind of abrasion-proof piston ring of application number 200820002171.8 (notification number: CN201162585Y) " patent, disclosed a kind of abrasion-proof piston ring that adapts to the high output of Hyundai Motor, maximum discharge restriction, high resistance to thermic load. The inventive point of this patent is by inlaying the Al of 2 ~ 10 μm of sizes in layers of chrome₂O₃Particle, its advantage: be further improved shortcoming than pure chromium coating wearability: along with engine operating duration is elongated, carbon deposit, abrasive material etc. become many, due to Al₂O₃Particle hardness is generally at 2000 ~ 2500HV, and its wear resistance or limited is is especially worn and torn still larger on high heat load, high explosion pressure engine, in addition in the early stage between running-in period, and Al₂O₃Just rub with casing wall, easily cause barrel wear large, unfavorable to initial stage break-in.

Three, summary of the invention:

Technical problem to be solved in the utility model is to provide a kind of possess better initial fitting property energy, the chromium of high-wear resistance-diamond composite deposite piston ring more.

For solving the problems of the technologies described above, the technical scheme that chromium of the present utility model-diamond composite deposite piston ring adopts is such: it comprises the chromium coating on piston ring substrate and matrix periphery, etching reticulate structure on chromium coating, mosaic diamond particle in reticulate pattern again, and electroplate the thin pure chromium plating layers of chrome of one deck at outermost. Described layers of chrome hardness: 800 ~ 1200HV, the reticulate pattern density of etching reticulate pattern: 40 ~ 120/mm²Diamond particles hardness: 3000 ~ 5000HV, diamond particle sizes size: 0.05 ~ 5 μm, diamond particles content (area ratio): 5 ~ 15%, the thin pure chromium coating thickness of outermost disc: 0.01 ~ 0.05mm, whole thickness of multiple plating: 0.05 ~ 0.25mm.

The utility model have employed the duplex electroplated chromium of mosaic diamond particle in chromium coating, due to features such as diamond particles hardness are high, good, the hot load-carrying properties of wearability are good, makes coating possess the heat-resisting load performance of better wearability and Geng Gao. By experimental test, the anti-wear performance of the utility model piston ring promotes more than 2.5 times than common coating piston ring, better meets the performance requirement of the novel high-power such as turbocharging, EGR, high moment of torsion, high heat load engine. Electroplated again the thin pure chromium coating of one deck at outermost in addition, relative hardness is lower, when making piston ring break-in in the early stage, reduces the attack to cylinder sleeve, protects cylinder sleeve, facilitate initial stage break-in widely.

Four, accompanying drawing illustrates:

Fig. 1 is schematic cross-section of the present utility model;

Fig. 2 is the part-structure schematic diagram of this practical new composite deposite.

Five, detailed description of the invention:

See Fig. 1, chromium of the present utility model-diamond composite deposite piston ring comprises piston ring substrate 1, and the thin pure chromium coating 6 of the composite deposite 2 of matrix 1 periphery and outermost disc. See Fig. 2, composite deposite 2 is made up of the reticulate structure 4 on chromium coating 3 and chromium coating 3 and the diamond particles 5 of inlaying in reticulate pattern.

The utility model is to adopt special electrochemical deposition mode. First the periphery at piston ring is electroplated one deck layers of chrome, then etching reticulate structure in layers of chrome, then diamond particles is embedded in reticulate pattern, through repeatedly repeating, define chromium-diamond composite layer that one deck is thicker, finally electroplate the thin pure chromium coating of one deck at outermost again.

Due to the utility model employing is electrochemical method, goes for any piston ring material, comprising: spheroidal graphite cast-iron, alloy cast iron, steel material.

Claims (1)

1. high-performance chromium-diamond composite deposite piston ring, comprise piston ring substrate (1), composite deposite (2) on matrix (1) periphery, and the thin pure chromium coating of one deck (6) on composite deposite (2) periphery, its composite deposite (2) feature is: by the upper reticulate structure (4) of chromium coating (3) and chromium coating (3), and diamond particles (5) composition embedding in reticulate pattern (4), the hardness range of chromium coating (3): 800 ~ 1200HV, the reticulate pattern density of reticulate pattern (4): 40 ~ 120/mm²The size of diamond particles (5): 0.05 ~ 5 μm, the content (area ratio) of diamond particles (5): 5 ~ 15%, the hardness of diamond particles (5): 3000 ~ 5000HV, thin pure chromium coating (6) thickness: 0.01 ~ 0.05mm, whole coating layer thickness is: 0.05 ~ 0.25mm.