Sliding Wear Characteristics of High-Performance Plasma Nitrided Bearing Steel

2012 ◽  
Vol 591-593 ◽  
pp. 873-879
Author(s):  
Sheng Guan Qu ◽  
Guang Hong Wang ◽  
Li Kui Liu ◽  
Yong Hu ◽  
Xiao Qiang Li
Keyword(s):  
High Performance ◽  
Sliding Wear ◽  
Friction And Wear ◽  
Plasma Nitriding ◽  
Normal Load ◽  
Nitrided Layer ◽  
Bearing Steel ◽  
Fretting Wear ◽  
Wear Characteristics ◽  
Nitrided Surface

Plasma nitriding technology was carried out on the surface of bearing steels. The phase composition and microhardness of the nitrided layer were analyzed. Sliding wear characteristics of the nitriding steel were studied on an Optimol SRV IV oscillating friction and wear tester at room temperature. The fretting wear mechanism was investigated with scanning electron microscopy (SEM) and 3D surface profiler. The results showed that Cr2N, Fe4N, Fe2 ~ 3N phases were observed on the nitrided surface layers; lubricating condition, normal load and friction velocity have great effect on the friction and wear characteristics of the plasma nitrided steels.

Effects of Contact Load on Fretting Wear of Al-Si Alloy Impregnated Graphite Composite

2005 ◽  
Author(s):  
H. Goto ◽  
Y. Amamoto
Keyword(s):  
Friction And Wear ◽  
Bearing Steel ◽  
Fretting Wear ◽  
Contact Load ◽  
Moist Air ◽  
Graphite Composite ◽  
Wear Characteristics ◽  
Contact Loads ◽  
Wear Tests ◽  
Friction And Wear Characteristics

An Al-Si alloy impregnated graphite composite (ALGR-MMC) containing a large amount of graphite (56 vol%) has been newly developed to improve the friction and wear characteristics of machine components such as clutches under dry sliding and journal bearings under lubricated sliding. The ALGR-MMC has the same self-lubricating performance as graphite in moist environments. It has good properties of thermal expansion, heat resistance and wear resistance. The objective of this study is to investigate the friction and wear of the ALGR-MMC under fretting conditions. Ball-against-disk type fretting wear tests for the ALGR-MMC (flat) in contact with bearing steel (ball) were conducted at various contact loads in moist air under unlubricated conditions. The friction coefficient was monitored during the tests. The area and depth of wear scars were measured after the tests or in the interrupted tests. From the friction and wear data, the effects of contact load on the fretting wear characteristics of the ALGR-MMC were evaluated with SEM observations of wear scars and EPMA analyses of wear surfaces.

The role of surface topography and normal load in the initiation of ratchetting-peak friction, seizure, scuffing, and elastic shakedown

2021 ◽  
pp. 1-12
Author(s):  
Vimal Edachery ◽  
V. Swamybabu ◽  
Gurupatham Anand ◽  
Paramasamy Manikandan ◽  
Satish V. Kailas
Keyword(s):  
Steady State ◽  
Surface Topography ◽  
Sliding Wear ◽  
Friction And Wear ◽  
Critical Parameter ◽  
Normal Load ◽  
Sliding Direction ◽  
Elastic Shakedown ◽  
Lubrication Conditions

Abstract Surface topography is a critical parameter that can influence friction and wear in engineering applications. In this work, the influence of surface topography directionality on seizure and scuffing initiation during tribological interactions is explored. For this, unidirectional sliding wear experiments were carried out in immersed lubrication conditions for various normal loads. The tribological interactions were studied using EN31-60 HRC flats and SAE52100-60HRC pins in a sphere on flat configuration. The results show that, in some cases, the sliding interactions in the initial cycles lead to a high friction coefficient of up to ∼0.68 in lubricated conditions, which was termed as ‘peak friction’, and this was accompanied by scuffing. The existence of peak friction was found to be dependent on surface topography directionality, especially when the directionality in topography was parallel to the sliding direction. Continuous ratchetting was found to be the cause of peak friction which was accompanied by seizure and scuffing. When the topography directionality was perpendicular or independent of sliding direction, elastic shakedown occurred at earlier cycles and prevented peak friction initiation, scuffing and also facilitated for higher steady-state friction values.

Friction and Wear Characteristics of Aluminum Alloy Impregnated Carbon Composite

1999 ◽  
Vol 121 (2) ◽  
pp. 294-300 ◽  
Author(s):  
Hozumi Goto ◽  
Shunji Omori
Keyword(s):  
Aluminum Alloy ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Carbon Composite ◽  
Bearing Steel ◽  
Surface Films ◽  
Wear Characteristics ◽  
The Matrix ◽  
The Coefficient Of Friction ◽  
Friction And Wear Characteristics

Pin-on-disk unidirectional sliding friction and wear experiments for an aluminum alloy impregnated carbon composite in contact with a bearing steel were carried out at various levels of contact load in wet and dry air. The aluminum alloy impregnated carbon composite exhibits better friction and wear characteristics than the matrix materials, aluminum alloy and graphite in wet air. The coefficient of friction and wear rate decrease, especially at high loads in wet air. Graphite, together with metallic and oxidative wear particles, adheres to the disk sliding surface of the bearing steel, resulting in the formation of compacted, uniform surface films. The films prevent metal-to-metal contact, achieving a good sliding friction and wear condition.

Characterization and modeling of friction and wear: an overview

2011 ◽  
Vol 2 (1) ◽  
pp. 19-28
Author(s):  
F. Al-Bender ◽  
K. De Moerlooze
Keyword(s):  
Coefficient Of Friction ◽  
High Performance ◽  
Friction And Wear ◽  
Normal Load ◽  
Traction Force ◽  
Friction Model ◽  
Virtual Design ◽  
Generic Models ◽  
The Coefficient Of Friction ◽  
Dynamics Models

In this age of virtual design, high-performance machines, and precise motion control, the abilityto characterize friction and wear processes and then to model and simulate them, becomes a pertinentissue. This communication gives a condensed overview of the generic characteristics of friction, thereafter,generic models, developed at KULeuven, PMA, are presented and discussed.with Leuven Air Bearings N.V. since Sept. 2010In regard to friction, both sliding and rolling are considered. The characterization concerns (i) therelationship between the friction (traction) force and the state of sliding of the system (displacement,velocity,…), at a given normal load; (ii) the relationship between the coefficient of friction and the normalload.As regards frictional behaviour in function of sliding (rolling) state, the main features are: (i) pre-sliding (prerolling) hysteresis and (ii) gross-sliding (rolling) dynamics. Models are presented that capture those featuresand relate them to the contact characteristics. Comparison with experimental results is also presented forthe main features. Secondly, the dependence of the coefficient of friction on the normal load is identifiedand modelled.Finally, regarding wear simulation, the generic friction model is extended to cater for an asperity populationthat changes during the lifetime of sliding. Based on fatigue considerations, asperities get broken after acertain number of contact cycles, and are replaced by smaller ones. With the aid of this model, we try tocorrelate energy dissipation with wear evolution, and support that by experimental observation.

COMPARISON OF SLIDING WEAR AND THREE-BODY ABRASIVE WEAR CHARACTERISTICS OF PLAIN CARBON STEEL

2011 ◽  
Vol 25 (31) ◽  
pp. 4257-4260
Author(s):  
YONG-SUK KIM ◽  
NARAE YOON ◽  
JONG CHUL KIM
Keyword(s):  
Carbon Steel ◽  
Abrasive Wear ◽  
Sliding Wear ◽  
Bearing Steel ◽  
Plain Carbon Steel ◽  
Dry Sliding Wear ◽  
Wear Characteristics ◽  
Steel Microstructure ◽  
Three Body ◽  
Wear Tests

Sliding wear and three-body abrasive wear characteristics of plain carbon steel (0.19C-0.72Mn) were compared to understand mechanisms of both wear in the steel. Microstructure of the steel was varied by heat treatments, and effects of microstructure as well as hardness on both wear were investigated. Dry sliding wear tests were carried out at room temperature using a pin-on-disk wear tester against AISI 52100 bearing steel. Three-body abrasive wear tests were performed using a ball-cratering abrasive wear tester employing angular SiC abrasives. The sliding wear proceeded with subsurface deformation and consequent fracture, while micro ploughing and cutting were major mechanisms of the abrasive wear. Hardness alone failed to characterize the sliding wear of the steel. Subsurface strain-hardening and uniform-deformation were principal controlling factors for the sliding wear, while hardness was the factor to control the abrasive wear of the steel under the given test condition.

Friction and Wear Characteristics of SiC and Si3N4 Ceramics Against ZrO2 Ceramic under Dry Friction

2007 ◽  
Vol 280-283 ◽  
pp. 1319-1322 ◽  
Author(s):  
X. Tian ◽  
Bin Lin ◽  
W.L. Zhang
Keyword(s):  
Dry Friction ◽  
Friction And Wear ◽  
Normal Load ◽  
Test Duration ◽  
Wear Characteristics ◽  
Wear Rates ◽  
The Coefficient Of Friction ◽  
Pin On Disk ◽  
Wear Maps ◽  
Friction And Wear Characteristics

The friction and wear of the silicon carbide (SiC) and hot pressed silicon nitride (Si3N4) against zirconia (Y–TZP) sliding under dry friction and room temperature conditions were investigated with pin-on-disk tribometer at sliding speed of 0.56 m·s-1 and normal load of 50 N, 80 N and 120 N, respectively. It was found that, the coefficient of friction and wear rate are dependent on the test duration as well as the normal load. Through analyzing and comparing, the wear rates of the two frictional couples both are in the 10-6 mm3 (N·m)-1. Based on the variety regulation of the wear maps, the wear mechanisms of the two couples were analyzed. Between the two couples, the friction and wear characteristics of the SiC/ZrO2 couple are better than the Si3N4/ZrO2 couple’s.

Friction and Wear Characteristics of Diamond-Like Carbon (DLC) Coating Used for Machine Elements

2011 ◽  
Author(s):  
D. W. Kim ◽  
K. W. Kim
Keyword(s):  
Friction And Wear ◽  
Normal Load ◽  
Bearing Steel ◽  
Wear Rates ◽  
Dlc Coating ◽  
Aisi 52100 ◽  
Machine Elements ◽  
Wear Tests ◽  
Friction And Wear Characteristics ◽  
Friction And Wear Tests

In this study, friction and wear tests were performed in order to investigate the effect of sliding velocity and normal load on the friction and wear characteristics of multi-layered diamond-like carbon (DLC) coating used for machine elements (automotive engine tappet, etc). Friction and wear tests against AISI 52100 bearing steel ball were performed under various sliding velocities (0.25, 0.5, 1 and 2 m/s) and normal loads (6.13, 20.7 and 49.0 N). As a result of test, kinetic friction coefficients and wear rates of multi-layered DLC coating and AISI 52100 bearing steel were obtained under each test condition. The result showed that the kinetic friction coefficients and wear rates generally decreased with the increase in sliding velocity and normal load.

Effect of Micro-Size Cenosphere Content on Friction and Dry Sliding Wear Behavior of Vinylester Composites – A Taguchi Method

2012 ◽  
Vol 585 ◽  
pp. 569-573 ◽  
Author(s):  
S.R. Chauhan ◽  
Sunil Thakur
Keyword(s):  
Wear Rate ◽  
Coefficient Of Friction ◽  
Sliding Wear ◽  
Friction And Wear ◽  
Normal Load ◽  
Dry Sliding ◽  
Sliding Speed ◽  
Applied Normal Load ◽  
The Coefficient Of Friction ◽  
Sliding Distance

In this paper the friction and wear characteristics of vinylester and vinylester composites have been investigated under dry sliding conditions for different applied normal load, sliding speed and sliding distance. The experiments have been carried on a pin on disc arrangement at normal room temperature conditions. The influence of friction and wear parameters like normal load, speed, sliding distance and percentage of filler content on the friction and wear rate has been investigated. In this study, a plan of experiments based on the techniques of Taguchi was performed to acquire data in a controlled way. An orthogonal array L27 (313) and Analysis of variance (ANOVA) were applied to investigate the influence of process parameters on the coefficient of friction and sliding wear behaviour of these composites. The Taguchi design of experiment approach eliminates the need for repeated experiments and thus saves time, material and cost. The results showed that with increase in the applied normal load and sliding speed the coefficient of friction and specific wear rate decreases under dry sliding conditions. It is also found that a thin film formed on the counterface seems to be effective in improving the tribological characteristics. The results showed that the inclusion of cenosphere as filler materials in vinylester composites will increase the wear resistance of the composite significantly.

Tribological Properties of Si3N4 Sliding Against Bearing Steel Under Different Conditions

2009 ◽  
Author(s):  
Yongxing Tong ◽  
Liqin Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Friction And Wear ◽  
Adhesive Wear ◽  
Bearing Steel ◽  
Deionized Water ◽  
Fretting Wear ◽  
Pin On Disk ◽  
Lubrication Conditions ◽  
Scanning Electron

The friction and wear behaviors of Si3N4/GCr15 were studied on the pin-on-disk machine under three different lubrication conditions. The results showed that both the friction and the wear were significantly lower in glycol than in deionized water and kerosene. The steady friction coefficient was 0.02 in glycol, 0.05 in deionized water and 0.20 in kerosene. Scanning electron microscopy revealed that formation and dissolution of the film may occur in deionized water and glycol. The main wear mechanisms were tribochemical and abrasive wear in deionized water, fretting wear for tribochemical film by esterification of oxidized surface of Si3N4 in glycol, corrosive and adhesive wear in kerosene.

Sign in / Sign up

Export Citation Format

Share Document