scholarly journals Experimental Analysis of Tribological Processes in Friction Pairs with Laser Borided Elements Lubricated with Engine Oils

Materials ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 5810
Author(s):  
Janusz Lubas ◽  
Wojciech Szczypiński-Sala ◽  
Paweł Woś ◽  
Edyta Zielińska ◽  
Krzysztof Miernik
Keyword(s):  
Surface Layer ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Engine Oil ◽  
Laser Remelting ◽  
Wear Process ◽  
Engine Oils ◽  
Bearing Alloy ◽  
Tribological Parameters ◽  
Lubricating Properties

The present study discusses the influence of engine oils on the tribological parameters of sliding couples with laser borided surface layer. The borided layer was formed on specimens made from AISI 5045 steel by laser remelting of a surface layer coated with amorphous boron. The sliding friction and wear process was carried out on the pairs with AISI 5045 steel and SAE-48 bearing alloys which were lubricated with 5W-40 and 15W-40 engine oils. The investigation showed significant differences in the friction coefficient and temperature in the tested pairs with the laser borided surface layer. In the couples lubricated with 5W-40 engine oil, the tested parameter of friction was higher than in the couples lubricated with 15W-40 engine oil. The couples lubricated with 5W-40 engine oil showed more intensive wear of SAE-48 bearing alloy in contact with the laser borided surface layer than the pairs lubricated with 15W-40 engine oil. The laser borided surface layer used in friction pairs leads to the destruction of the lubricating properties of engine oils and reduces its resistance to scuffing.

INFLUENCE OF LASER BORIDING ON THE FRICTION AND WEAR OF SLIDING COUPLES WITH BEARING ALLOYS

2019 ◽  
Vol 27 (01) ◽  
pp. 1950084 ◽  
Author(s):  
KAZIMIERA DUDEK ◽  
WOJCIECH SZCZYPINSKI-SALA ◽  
JANUSZ LUBAS
Keyword(s):  
Surface Layer ◽  
Friction Coefficient ◽  
Contact Area ◽  
Friction And Wear ◽  
Engine Oil ◽  
Amorphous Boron ◽  
Laser Remelting ◽  
Steel Aisi ◽  
Bearing Alloy ◽  
Lubricating Properties

The present study discusses the influence of laser borided surface layer on the parameters of sliding couples lubricated by engine oil. The borided layer was created by laser remelting of a surface layer of steel samples coated with amorphous boron. The study of friction, wear, and lubrication was conducted on the pairs made of steel AISI 5045 and SAE-783 and SAE-48 bearing alloys which were lubricated with 15W/40 engine oil. The research showed important differences in the friction coefficient and temperature in the tested couple with laser borided surface layer. In the couples containing the counterparts with SAE-783 bearing alloy, the tested parameter of friction was higher than in the couple composed of counterparts with SAE-48 bearing alloy. The counterparts with SAE-48 showed more intensive wear in contact with the laser borided surface layer than the counterpart with SAE 783. The process of friction at the contact area of the sliding couple with laser borided surface layer leads to the destruction of the lubricating properties of 15W/40 engine oil and reduces its resistance to scuffing and seizure.

INFLUENCE OF ENGINE OIL ON THE FRICTION AND WEAR OF A SURFACE LAYER WITH BORON

Tribologia ◽  
2017 ◽  
Vol 272 (2) ◽  
pp. 107-112
Author(s):  
Janusz LUBAS ◽  
Wojciech SZCZYPIŃSKI-SALA
Keyword(s):  
Surface Layer ◽  
Contact Area ◽  
Friction And Wear ◽  
Friction Pair ◽  
Mineral Oil ◽  
Engine Oil ◽  
Synthetic Oil ◽  
Start Up ◽  
Higher Temperature ◽  
Bearing Alloy

The aim of the present work is to determine the influence of surface layers with boron and engine oil on the processes of friction and wear in friction pairs. The ring samples with a borided surface layer cooperated under test conditions with counterparts made with CuPb30 bearing alloy. During the tests, the friction pairs were lubricated with 15W/40 Lotos mineral oil and 5W/40 Lotos synthetic oil. The friction pairs lubricated by Lotos synthetic oil a generate stronger friction force and higher temperature in the contact area of friction pairs, as compared to the pairs lubricated by Lotos mineral oil. Lubrication of the friction pairs by mineral oil in the start-up phase causes faster stabilization of the friction conditions than in the case of lubrication by synthetic oil. The wear of bearing alloy was lower when lubricated by Lotos mineral oil than by Lotos synthetic oil. The process of friction in the contact area of the friction pair leads to the destruction of the lubricant and the reduction of its operational properties, especially at high temperatures.

TRIBOLOGICAL PROPERTIES OF SURFACE LAYER WITH BORON IN FRICTION PAIRS

2009 ◽  
Vol 16 (05) ◽  
pp. 767-773 ◽  
Author(s):  
JANUSZ LUBAS
Keyword(s):  
Surface Layer ◽  
Sliding Friction ◽  
Engine Oil ◽  
Frictional Pair ◽  
Surface Layers ◽  
Resistance Level ◽  
Start Up ◽  
Nitrided Surface ◽  
Friction Parameters ◽  
Bearing Alloy

The aim of the present work is to determine the influence of technologically produced boron surface layers on the friction parameters in the sliding pairs under the conditions of mixed friction. The tribological evaluation included ion nitrided, pack borided, laser borided, quenched and tempered surface layers and TiB2 coating deposited on 38CrAlMo5-10 , 46Cr2 and 30MnB4 steels. Modified surface layers of annular samples were matched under test conditions with counter-sample made from AlSn20 bearing alloy. Tested sliding pairs were lubricated with 15 W/40 Lotos mineral engine oil. The tribological tests were conducted on a T-05 block on ring tester. The applied steel surface layer modification with boron allows surface layers to be created with pre-determined tribological characteristics required for the elements of kinematic pairs operating in the conditions of sliding friction. Pack boronizing reduces the friction coefficient during the start-up of the frictional pair and the maximum start-up resistance level is similar to the levels of pairs with nitrided surface layers.

scholarly journals A Method for Tribological Measurements of Coated Abrasives using a Rheometer

2021 ◽  
Vol 69 (2) ◽  
Author(s):  
Andreas Gammelgård ◽  
Jessica Tuuf ◽  
Anders Strand ◽  
Mats Sundell ◽  
Margareta Björklund-Sänkiaho
Keyword(s):  
Particle Size ◽  
Friction And Wear ◽  
Normal Load ◽  
Grinding Process ◽  
Wear Process ◽  
Grain Sizes ◽  
Abrasive Grain ◽  
Steel Balls ◽  
Coated Abrasives ◽  
Tribological Parameters

AbstractCoated abrasives (sandpaper) are imperative in various industrial areas, including the automotive and the metal industry. An exact outcome is often highly appreciated in abrasion processes, which means that the wear process must be precisely controlled. In this paper, a new method for analyzing the grinding process of coated abrasives is proposed. In order to study the grinding properties of sandpaper, a tribology cell was connected to a rheometer. The experiments consisted of unlubricated (dry) steel balls-on-disc experiments on coated abrasive with aluminum oxide grains. The friction and wear data showed that the rheometer equipped with a tribology cell can be used to measure different tribological parameters, such as the friction coefficient and the Gap. The wear process was investigated over a range of abrasive grain sizes (9–40 µm) and a variety of different loads (1–10 N). Results from these experiments showed that the abrasive wear increased with increasing particle size and normal load. Hence, it is proposed that this method is a reliable approach for investigating the wear process of coated abrasives.

The Effect of Diesel Engine Oil Contamination on Friction and Wear

2005 ◽  
Author(s):  
P. Ramkumar ◽  
L. Wang ◽  
T. J. Harvey ◽  
R. J. K. Wood ◽  
K. Nelson ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Sulphuric Acid ◽  
Condition Monitoring ◽  
Friction And Wear ◽  
Engine Oil ◽  
Oil Contamination ◽  
Engine Oils ◽  
Model Diesel ◽  
The Relationship

The aim of this work is to better understand the relationship between the wear of sliding tribo-couples and contamination such as soot, sulphuric acid, moisture and oxidation levels to simulate the influence of contamination in model diesel engine oils using electrostatic condition monitoring.

A Comparative Study of Microstructure, Coefficient of Friction and Wear Rate of Alloy Ni-Cr-B-Si-C-W

2021 ◽  
Vol 406 ◽  
pp. 229-239
Author(s):  
Mohamed Nabil Bachirbey ◽  
Mohammed Seyf Eddine Bougoffa ◽  
Chahrazed Benouali ◽  
Tahar Sayah
Keyword(s):  
Wear Rate ◽  
Coefficient Of Friction ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Normal Load ◽  
New Approach ◽  
The Coefficient Of Friction ◽  
Loss Of Mass ◽  
Tribological Parameters

The present work aims at the study of the dry disc pion contact and the complex phenomenon of the wear as well as the sliding friction of our sample elaborated by a hot isotactic compression and the pion. This study consists in determining the coefficient of friction and the influence of the tribological parameters on this phenomenon as well as determining the loss of mass and the wear rate of study sample. In order to enhance the assurance of the validity of the results of tribological study of Ni-Cr-B-Si-C-W alloy in laboratories and compare that to the tribological conditions in reality and industries. This work presents the results of the new approach to compares the wear behavior of the sample between a theoretical study (tribometer)and another in service (a test bench) that reproduces approximately the same conditions as the tribometer (normal load, sliding speed and distance traveled) by measuring the loss of mass and wear rate.

A Study of Laser Cladding on the NiCr/Cr3C2-WS2-CaF2 Coating

2013 ◽  
Vol 747-748 ◽  
pp. 146-151 ◽  
Author(s):  
Shu Fa Chen ◽  
Cheng Long Feng ◽  
Jin Yang ◽  
Jin Song Chen
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Composite Coating ◽  
Laser Cladding ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Stainless Steel Substrate ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Wear Process

NiCr/Cr3C2-WS2-CaF2 mixed powders were prepared on 1Cr18Ni9Ti stainless steel substrate to fabricate high-temperature self-lubrication wear resistant composite coating by laser cladding. The microstructure of the coating was examined by means of XRD, SEM and EDS. The high-temperature dry sliding friction and wear behavior of the composite coating were evaluated by using a ball-on-block wear tester at room temperature, 300 and 600 , respectively. The results showed that the composite coating had a unique microstructure consisting of γ-(Ni,Fe) solid solution matrix, Cr7C3/WC reinforcement and CrS/WS2 lubricant particles. The hardness of NiCr/Cr3C2-WS2-CaF2 coating by laser cladding was lower than NiCr/Cr3C2 coating, but higher than stainless steel substrate significantly. It was because of the addition of solid lubricant. In the wear process, elevated temperature was helpful to form a lubricating transfer film. As a result, the NiCr/Cr3C2-WS2-CaF2 coating exhibited a notable anti-friction and wear resistance at 300 and 600 .

scholarly journals Oil selection and resources of internal combustion engine

2021 ◽  
Vol 31 (3) ◽  
pp. 166-173
Author(s):  
Dorjsuren Ishdorj ◽  
Enkhbayar Gonchigdorj
Keyword(s):  
Internal Combustion Engine ◽  
Combustion Engine ◽  
Internal Combustion ◽  
Climatic Conditions ◽  
Engine Oil ◽  
Metallic Elements ◽  
Proper Selection ◽  
Engine Oils ◽  
Tribological Parameters ◽  
Internal Combustion Engine Oils

We have studied some of the tribological parameters of 30 types of internal combustion engine oils widely sold in the Mongolian market and determined that they can be used in two groups according to their advantages.  In recent years, more than 2,000 “Land Cruiser-200” cars worth 160.0-250.0 million MNT have been imported and used in traffic in every corner of Mongolia. Therefore, in the case of our country with extreme natural and climatic conditions, the Land Cruiser-200 imported from abroad has not been damaged during its service life, and in order to fully utilize the resources, we determined the period for proper selection and use of engine oil, replacement, diagnostics and maintenance. Moreover, we was developed a model to determine the possibility of the engine stock by using the amount of toxic gas in smoke composition, and using the content of metallic elements found in the engine oil. Дотоод шаталтын хөдөлгүүрийн тосны сонголт, нөөц тогтоох судалгаа Манай орны зах зээлд өргөн худалдаалагдаж буй 30 нэр төрлийн дотоод шаталтын хөдөлгүүрийн тосны трибологийн зарим үзүүлэлтүүдийг судалж, тэдгээрийг давуу, ашигтай байдлаар нь 2 бүлэгт эрэмблэн ангилж орлуулан хэрэглэх боломжийг тогтоов. Монгол Улсын аж ахуйн нэгж, иргэд сүүлийн жилүүдэд үнэ, өртөг ихтэй импортоор орж ирж буй “Ланд крузер-200” автомашиныг жилд 2000-аас дээш тоогоор худалдан авч эх орны өнцөг булан бүрт өргөн ашиглаж байна. Байгаль, цаг уурын эрс тэс байдал, зам харгуйн тааруу нөхцөл нь манай орны хувьд гадаадаас оруулж ирсэн суудлын автомашиныг ашиглалтын хугацаанд эвдрэл гэмтэлгүй, нөөцийг нь бүрэн ашиглуулах зорилгоор хөдөлгүүрийн тосыг тогтоосон үечлэлд тос солих, оношилгоо, техникийн үйлчилгээ хийх хугацаа зэргийг шинжлэх ухааны үндэслэлтэй тогтоов. Хөдөлгүүрийн ажилласан тосонд илэрсэн металл элементүүдийн агууламж, утааны найрлага дахь хорт хийн хэмжээгээр хөдөлгүүрийн нөөцийн хэтийн төлөвийг тодорхойлох загвар гаргав.   Түлхүүр үг: Хөдөлгүүрийн тос, үрэлт, элэгдэл, эдэлгээний нөөц 

scholarly journals Tribological Behaviour of Graphene Nanoplatelets as Additive in Pongamia Oil

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 732
Author(s):  
Yeoh Jun Jie Jason ◽  
Heoy Geok How ◽  
Yew Heng Teoh ◽  
Farooq Sher ◽  
Hun Guan Chuah ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Graphene Nanoplatelets ◽  
Friction Reduction ◽  
Engine Oil ◽  
Protective Film ◽  
Tribological Behaviour ◽  
Wear Reduction ◽  
Pongamia Oil ◽  
Interacting Surfaces ◽  
Worn Surface

This study investigated the tribological behaviour of Pongamia oil (PO) and 15W–40 mineral engine oil (MO) with and without the addition of graphene nanoplatelets (GNPs). The friction and wear characteristics were evaluated in four-ball anti-wear tests according to the ASTM D4172 standard. The morphology of worn surfaces and the lubrication mechanism of GNPs were investigated via SEM and EDS. This study also focuses on the tribological effect of GNP concentration at various concentrations. The addition of 0.05 wt % GNPs in PO and MO exhibits the lowest friction and wear with 17.5% and 12.24% friction reduction, respectively, and 11.96% and 5.14% wear reduction, respectively. Through SEM and EDS surface analysis, the surface enhancement on the worn surface by the polishing effect of GNPs was confirmed. The deposition of GNPs on the friction surface and the formation of a protective film prevent the interacting surfaces from rubbing, resulting in friction and wear reduction.

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