Development of Material Surface Engineering to Reduce the Friction and Wear of the Piston Ring

1997 ◽  
Author(s):  
Qixian Shen
Keyword(s):  
Friction And Wear ◽  
Piston Ring ◽  
Surface Engineering ◽  
Material Surface

scholarly journals A Novel Decarburizing-Nitriding Treatment of Carburized/through-Hardened Bearing Steel towards Enhanced Nitriding Kinetics and Microstructure Refinement

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 112
Author(s):  
Fuyao Yan ◽  
Jiawei Yao ◽  
Baofeng Chen ◽  
Ying Yang ◽  
Yueming Xu ◽  
...  
Keyword(s):  
Surface Engineering ◽  
Plasma Nitriding ◽  
Nitrided Layer ◽  
Metallographic Analysis ◽  
Material Surface ◽  
Low Carbon ◽  
High Carbon ◽  
Softening Effect ◽  
Microstructure Refinement ◽  
Bearing Steels

Decarburization is generally avoided as it is reckoned to be a process detrimental to material surface properties. Based on the idea of duplex surface engineering, i.e., nitriding the case-hardened or through-hardened bearing steels for enhanced surface performance, this work deliberately applied decarburization prior to plasma nitriding to cancel the softening effect of decarburizing with nitriding and at the same time to significantly promote the nitriding kinetics. To manifest the applicability of this innovative duplex process, low-carbon M50NiL and high-carbon M50 bearing steels were adopted in this work. The influence of decarburization on microstructures and growth kinetics of the nitrided layer over the decarburized layer is investigated. The metallographic analysis of the nitrided layer thickness indicates that high carbon content can hinder the growth of the nitrided layer, but if a short decarburization is applied prior to nitriding, the thickness of the nitrided layer can be significantly promoted. The analysis of nitriding kinetics shows that decarburization reduces the activation energy for nitrogen diffusion and enhances nitrogen diffusivity. Moreover, the effect of decarburization in air can promote surface microstructure refinement via spinodal decomposition during plasma nitriding.

Influence of positive texturing on friction and wear properties of piston ring-cylinder liner tribo pair under lubricated conditions

2019 ◽  
Vol 71 (4) ◽  
pp. 515-524 ◽  
Author(s):  
Venkateswara Babu P. ◽  
Ismail Syed ◽  
Satish Ben Beera
Keyword(s):  
Wear Resistance ◽  
Internal Combustion Engine ◽  
Friction And Wear ◽  
Piston Ring ◽  
Combustion Engine ◽  
Cylinder Liner ◽  
Internal Combustion ◽  
Tribological Performance ◽  
Friction Reduction ◽  
Content Type

Purpose In an internal combustion engine, piston ring-cylinder liner tribo pair is one among the most critical rubbing pairs. Most of the energy produced by an internal combustion engine is dissipated as frictional losses of which major portion is contributed by the piston ring-cylinder liner tribo pair. Hence, proper design of tribological parameters of piston ring-cylinder liner pair is essential and can effectively reduce the friction and wear, thereby improving the tribological performance of the engine. This paper aims to use surface texturing, an effective and feasible method, to improve the tribological performance of piston ring-cylinder liner tribo pair. Design/methodology/approach In this paper, influence of positive texturing (protruding) on friction reduction and wear resistance of piston ring surfaces was studied. The square-shaped positive textures were fabricated on piston ring surface by chemical etching method, and the experiments were conducted with textured piston ring surfaces against un-textured cylinder liner surface on pin-on-disc apparatus by continuous supply of lubricant at the inlet of contact zone. The parameters varied in this study are area density and normal load at a constant sliding speed. A comparison was made between the tribological properties of textured and un-textured piston ring surfaces. Findings From the experimental results, the tribological performance of the textured piston ring-cylinder liner tribo pair was significantly improved over a un-textured tribo pair. A maximum friction reduction of 67.6 per cent and wear resistance of 81.6 per cent were observed with textured ring surfaces as compared to un-textured ring surfaces. Originality/value This experimental study is helpful for better understanding of the potency of positive texturing on friction reduction and wear resistance of piston ring-cylinder liner tribo pair under lubricated sliding conditions.

Development and Experiment of Surface Engineering Technology on Mulberry Silk Brocade Fabrics

2011 ◽  
Vol 314-316 ◽  
pp. 17-22
Author(s):  
Shi Chao Li ◽  
Chang Bo Tang ◽  
Xuan Wang ◽  
Jian Ping Shi
Keyword(s):  
Bonding Strength ◽  
Surface Engineering ◽  
Material Surface ◽  
Original Performance ◽  
Obvious Effect ◽  
Engineering Technology ◽  
Antibiotic Action

Exploring and using surface engineering technology into the Anti-aging antibacterial mold of mulberry silk brocade fabrics through multiple dipping and padding to carry out limited permeation and effective bonding strength on material surface. It has obvious effect on antibiotic action and less effect on the silk materials’ original performance.

Study on New Bimetal Floating Seal of High Speed Roller Bit Bearing

2011 ◽  
Vol 233-235 ◽  
pp. 2158-2165
Author(s):  
Zhi Qiang Huang ◽  
Yi Zhou ◽  
Qin Li ◽  
Wei Li ◽  
Zhen Chen ◽  
...  
Keyword(s):  
Pressure Distribution ◽  
Compression Ratio ◽  
High Speed ◽  
Surface Engineering ◽  
Material Surface ◽  
Metal Ring ◽  
Element Analysis ◽  
Premature Failure ◽  
Rubber Ring ◽  
Sealing Pressure

ANSYS software has been used for high speed rock bit bimetal floating seal finite element analysis, as a result, overlarge pressure of bearing seal, unreasonable pressure distribution and overlarge compression ratio of rubber ring, are main reasons for premature failure of the bearing seal. For this, the optimal design and analysis of bearing seal structure is carried out in this paper. The results showed that: the new structure of the bearing seal has effectively reduced the compression ratio of rubber ring, improved the sealing pressure distribution based on reliable sealing conditions and further reduced the sealing pressure peak. The design of dynamic metal ring flywheel lubrication groove and the application of static metal ring antifriction material surface engineering technology have obviously reduced surface friction factor and wear of metal ring, greatly improved the effectiveness and life of the seal, and further extended the bit’s life.

Study on the Abrasive Wear of Chromeplate Piston Ring and Cylinder Jacket Made by Different Materials

2012 ◽  
Vol 591-593 ◽  
pp. 927-930
Author(s):  
Wen Wei Gao ◽  
Zhi Zheng ◽  
Jian Ming Yang ◽  
Ya Qin An
Keyword(s):  
Abrasive Wear ◽  
Quartz Sand ◽  
Friction And Wear ◽  
Piston Ring ◽  
Positive Influence ◽  
Piston Rings ◽  
Cylinder Bore ◽  
Great Damage ◽  
Abrasive Ability

The abrasion of piston rings/tribomate pairs of cylinder jacket has great damage to engine, which can shorten the life of piston rings and cylinder bore, decrease the power of engine, enlarge the amount of oil, and release more pollution. Take a research of abrasive wear of piston ring and cylinder jacket made by different materials, will create a positive influence on extending the life of engine. This paper takes the SRV friction and wear tester, conducts the research on the abrasive ability of the three tribomate pairs (Cr plated piston ring and P-B, Cu-Cr-Ni-Mo and bainite cylinder bores) under the condition that there lies a certain amount of quartz sand in the lubricant and find that the hardness, intensity and tenacity of tribomate materials can have influence on its capability of resisting abrasion.

The Depositional Laser Cladding with Fiber Laser

2009 ◽  
Vol 628-629 ◽  
pp. 447-452
Author(s):  
Peng Fei Lv ◽  
Ji Min Chen ◽  
F.R. Liu
Keyword(s):  
Particle Size ◽  
Laser Cladding ◽  
Surface Engineering ◽  
Laser Energy ◽  
Thin Layers ◽  
Material Surface ◽  
New Approach ◽  
Mean Particle Size ◽  
Cladding Layer

Laser cladding has been developed as a useful technology to modify material surface in industry. In this paper a new approach of surface modification is introduced. Depositional Laser Cladding (DLC) was developed and the different mechanisms were investigated during the manufacture. Basing on particular analysis of defects in the experiment, the relation between the quality of cladding layer and laser energy density is manifested. Depositional effect and thermal effect play their roles in different place and the depositional effect provides thin layers with the thickness of near mean particle size. Appropriate parameters of laser energy can promote high quality, avoiding pores and stacks in agglomeration and ebullition. Controllable low thickness near mean particle size and sharp edge make it possible to be used on producing certain shape in the surface engineering field, such as restoring and gradient materials.

Numerical Simulation on the Lubrication Performance of Surface Textured Piston Rings

2011 ◽  
Vol 199-200 ◽  
pp. 734-738 ◽  
Author(s):  
Qiu Ying Chang ◽  
Xian Liang Zheng ◽  
Qing Liu
Keyword(s):  
Numerical Simulation ◽  
Film Thickness ◽  
Friction Force ◽  
Friction And Wear ◽  
Piston Ring ◽  
Hydrodynamic Lubrication ◽  
Cylinder Liner ◽  
Area Density ◽  
Oil Film ◽  
Lubrication Performance

Surface texturing has been successfully employed in some tribological applications in order to diminish friction and wear. This technology may be used in a piston ring to decrease the friction and wear of the contact between a piston ring and cylinder liner. A numerical simulation of lubrication between a surface textured piston ring and cylinder liner based on the hydrodynamic lubrication theory was conducted. The influence of surface texture parameters on piston ring lubrication performance was obtained by solving the mathematical equations with a multi-grid method. The results show that under the micro-dimple area density of 5%-40% the minimum oil film thickness increases and the dimensionless friction force decreases with the increasing of it. Under the dimple area density of 40%-60%, the minimum oil film thickness and the dimensionless friction force change slightly. Under various dimple area densities the optimum dimple depth at the given working condition in this paper is about 5µm.

Friction and wear properties of poly(ether sulfone) containing perfluorocarbon end group

2017 ◽  
Vol 30 (2) ◽  
pp. 247-253 ◽  
Author(s):  
Ye Zhu ◽  
Yingshuang Shang ◽  
Haibo Zhang ◽  
Lianjun Ding ◽  
Yunping Zhao ◽  
...  
Keyword(s):  
Wear Rate ◽  
Photoelectron Spectroscopy ◽  
Tribological Property ◽  
Friction And Wear ◽  
Performance Enhancement ◽  
Wear Test ◽  
Material Surface ◽  
Wear Property ◽  
Wear Properties ◽  
Worn Surface

Poly(ether sulfone) (PES) with high coefficient of friction (COF) and wear rate needs treatment to enhance its tribological property in engineering plastic area. Here, the low surface energy of perfluorocarbon chains terminated poly (ether sulfone) (PES-F) had been used to improve the tribological property of such self-lubricating materials. In this research, the performance enhancement due to the existence of perfluorocarbon group on the material surface was discussed on improvement of anti-friction and wear resistance. On the premise of mechanical strength guarantee, the variation regularity of COF and volume wear rate of PES-F were quantitatively analyzed through the pin-on-disc wear test apparatus, combined with X-ray photoelectron spectroscopy analysis. It was found that PES-F exhibited the best tribological property during the initial phases of friction test, attributing to the highest content of F on the material surface. Observation of PES-F worn surface and wear debris revealed that the COF and wear rate of modified PES were decreased not only due to the effect of perfluorocarbon group but also by the change of worn surface morphology, both of which were the main reasons for anti-friction and anti-wear property enhancement.

Material surface engineering for multiplex cell culture in microwell

2014 ◽  
Vol 49 (13) ◽  
pp. 4481-4489 ◽  
Author(s):  
Ophélie I. Berthuy ◽  
Céline A. Mandon ◽  
Benjamin P. Corgier ◽  
Guillaume G. Octobre ◽  
Giacomo Ceccone ◽  
...  
Keyword(s):  
Cell Culture ◽  
Surface Engineering ◽  
Material Surface
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