Water-lubricated behaviour of AISI 440C stainless steel and a DLC coating for an orbital hydraulic motor application

Strmčnik, Ervin; Majdič, Franc; Kalin, Mitjan

doi:10.1016/j.triboint.2018.10.032

Cited by 37 publications

(20 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A combination of an appropriate geometry of the mechanical parts, the holes in the valve plate and the pressure differences in the lobes ensures that the rotational speed of the shaft is up to 25 min −1 and that the torque is up to 1000 Nm. A problem with the hydraulic motor is its low overall efficiency, which is closely related to the friction and wear [119]. However, this work showed that with an appropriate modification of the contacts, with the appropriate roughness, DLC coatings can greatly improve the contact performance, and so reduce the friction and wear.…”

Section: Water Lubricationmentioning

confidence: 92%

“…a) Schematic of a 4/3 water-hydraulic valve operating with a DLC coating in water; and b) spool and sleeve samples that were tested in 4/3 water-hydraulic valve [118] The above-mentioned application and experiments were performed at low contact pressures, but our very recent work focused on a high-contactpressure application. Namely, to a low-speed, but high-torque, orbital hydraulic motor, which normally operates under oil-lubricated conditions [119]. Such a hydraulic motor is a highly loaded mechanical component that converts hydraulic energy into the rotational motion of the shaft.…”

Section: Water Lubricationmentioning

confidence: 99%

See 1 more Smart Citation

Green Tribology for the Sustainable Engineering of the Future

Kalin

Kus

Majdič

2019

SV-JME

View full text Add to dashboard Cite

Environmental awareness and especially the legislation that requires the reduction of polluting emissions are strong driving forces toward more sustainable engineering and greener solutions in the design, use and overall life span of machinery. However, providing novel concepts that will exclude non-environmentally adapted, but over many years developed and optimized solutions, is not an easy task. It clearly requires time if the same level of technical performance is to be maintained. Green tribology is one of the fields that has been closely involved in these actives in the past two decades. The research and use of tribology science and technology toward green and sustainable engineering include natural material usage, lower energy consumption, reducing natural oil resources, reducing pollution and emissions, fewer maintenance requirements and thus reduced machinery-investment cycles. This report is not an attempt to cover all the existing concepts, attempts or literature available in the field, but mainly those efforts that our group has been working on over the past 20 years, which mainly includes novel green-lubrication concepts that come from exploring and exploiting surface engineering through the use of diamond-like-carbon (DLC) coatings.

show abstract

Section: Water Lubricationmentioning

confidence: 92%

Section: Water Lubricationmentioning

confidence: 99%

Green Tribology for the Sustainable Engineering of the Future

Kalin

Kus

Majdič

2019

SV-JME

View full text Add to dashboard Cite

show abstract

“…With the increasing of lubrication pressure, the pressure decayed rapidly in radial direction of the damping gap. The bearing capacity of the highwater-based lubrication film was calculated by the Equation (5). The bearing capacity of highwater-based lubrication film was ~1300 N when the lubrication pressure was 4 MPa, which could not support the normal load on friction pair (~2700 N).…”

Section: The Lubrication Mechanism and Wear Behavior Of The 316l-ptfementioning

confidence: 99%

“…To design the piston and cylinder in water hydraulic axial piston pump, Yang et al researched the matching of 940 stainless steel-F102 engineering plastics and 940 stainless steel-Al 2 O 3 ceramic by experimental and theoretical analysis, which found that the ceramic and engineering plastics had excellent lubrication performance in water hydraulic transmission [4]. Strmčnik et al studied the lubrication behavior of AISI 440C stainless steel and diamond-like carbon DLC coating for an orbital water hydraulic motor application, which significantly decreased the friction coefficient and wear of the DLC coating [5]. The lubrication of a new-type slipper friction pair in water hydraulic axial pump was analyzed by numerical simulation and theoretical analysis, which obtained the lubrication characteristics of the slipper friction pair [6].…”

mentioning

confidence: 99%

Study the Influence of Surface Morphology and Lubrication Pressure on Tribological Behavior of 316L–PTFE Friction Interface in High-Water-Based Fluid

et al. 2020

View full text Add to dashboard Cite

Because of the low viscosity of high-water-based fluids, the intense wear and leakage of key friction pairs represent a bottleneck to the wide application of the high-water-based hydraulic motor in engineering machinery. In this work, based on the common characteristics of plane friction pairs, the friction experiments of a 316L stainless steel (316L)–polytetrafluoroethylene (PTFE) friction pair under various working condition were carried out by a self-designed friction experimental system with fluid lubrication. The influence of lubrication pressure and surface morphology on the 316L–PTFE friction pair was investigated both experimentally and theoretically. The experimental and numerical results indicated that increasing lubrication pressure reduced the surface wear of PTFE sample, but the leakage of 316L–PTFE friction pair also increased. It could not form an effective fluid lubrication film in the 316L–PTFE friction pair under low lubrication pressure, which caused the severe wear in friction pair interface. The smooth 316L surface could be conducive to the formation of high-water-based fluid lubrication film in 316L–PTFE friction interface. The pressure distribution of high-water-based fluid lubrication film in 316L–PTFE friction pair was also obtained in fluent. The PTFE surface was easily worn when the lubrication film in the friction pair was too thin or uneven. The friction and wear were obviously improved when the normal load was balanced by the bearing capacity of the high-water-based fluid lubrication film.

show abstract

“…It was found that the combination of Cr/GLC coating and Si 3 N 4 ceramic presented the optimum tribological performance. Strmčnik et al [16] presented an investigation on the tribological behaviors of AISI 440C ball coupled with diamond-like carbon (DLC) coated disk under water lubrication condition for orbital hydraulic motor application. It was concluded that the wear coefficient for the DLC coating was about 10 −9 mm 3 /Nm, and the friction coefficient of this tribopair in water was lower than that under oil lubrication conditions.…”

Section: Introductionmentioning

confidence: 99%

Tribological Performance of CF-PEEK Sliding against 17-4PH Stainless Steel with Various Cermet Coatings for Water Hydraulic Piston Pump Application

Nie

Lou

et al. 2019

Coatings

View full text Add to dashboard Cite

To improve the abrasion resistance performance of the critical tribopairs within water hydraulic piston pumps, tribological characteristics of the stainless steel 17‐4PH and 17‐4PH coated with Cr3C2‐NiCr, WC‐10Co‐4Cr, Cr2O3 and Al2O3‐13%TiO2 sliding against carbon fiber reinforced polyetheretherketone (CF‐PEEK) composite under water‐lubricated condition were experimentally studied using a pin‐on‐ring test bench with different working conditions. It has been demonstrated by the experimental results that the tribological behaviors of CF‐PEEK/cermet coatings tribipairs were better than that of CF‐PEEK/17‐4PH tribopair under water lubrication. However, the Cr3C2‐NiCr coating could be damaged under high rotational speed. Due to the reaction film produced by the Al2O3‐13%TiO2 and water, the CF‐PEEK/Al2O3‐13%TiO2 material combination exhibits more excellent tribological behaviors than other tribopairs lubricated with water, and could preferentially be used in water hydraulic piston pumps.

show abstract

Water-lubricated behaviour of AISI 440C stainless steel and a DLC coating for an orbital hydraulic motor application

Cited by 37 publications

References 33 publications

Green Tribology for the Sustainable Engineering of the Future

Green Tribology for the Sustainable Engineering of the Future

Study the Influence of Surface Morphology and Lubrication Pressure on Tribological Behavior of 316L–PTFE Friction Interface in High-Water-Based Fluid

Tribological Performance of CF-PEEK Sliding against 17-4PH Stainless Steel with Various Cermet Coatings for Water Hydraulic Piston Pump Application

Contact Info

Product

Resources

About