Effect of load on the tribo-performance of 23-8N valve steel against GGG-60 seat material

Ashraf, Umair; Saleem, Shahid; Wàňi, M.F.; Khan, M. Jebran

doi:10.1016/j.matpr.2019.07.611

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…The second-lowest friction factor is observed to be at 0.25 m/s pin velocity and reciprocating motion. Here, the friction factor goes up initially and then goes down up to a certain time for all conditions due to the formation of a glazed layer [ 59 , 60 ]. The simultaneous motion of pin and disc makes two types of motion, which, in fact, increases surface area, which is responsible for higher friction.…”

Section: Resultsmentioning

confidence: 99%

Effects of Self-Lubricant Coating and Motion on Reduction of Friction and Wear of Mild Steel and Data Analysis from Machine Learning Approach

et al. 2021

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The applications of coated mild steels are gaining significant attention in versatile industrial areas because of their better mechanical properties, anticorrosive behavior, and reproducibility. The life period of this steel reduces significantly under relative motion in the presence of friction, which is associated with the loss of billion-dollar every year in industry. Productivity is hampered, and economic growth is declined. Several pieces of research have been conducted throughout the industries to seeking the processes of frictional reduction. This study is attributed to the tribological behavior of electroplated mild steel under various operating parameters. The efficiency of commercial lubricant and self-lubrication characteristics of coated layer plays a significant role in the reduction of friction. The reciprocating and simultaneous motion in relation to pin as well as disc are considered during experimentation. The lubricating effects in conjunction with motions are responsible for compensating the friction and wear at the desired level. During frictional tests, the sliding velocity and loads are changed differently. The changes in roughness after frictional tests are observed. The coated and rubbing surfaces are characterized using SEM (Scanning Electron Microscopy) analysis. The coating characteristics are analyzed by EDS (Energy Disperse Spectroscopy), FTIR (Fourier-transform Infrared Spectroscopy), and XRD (X-ray diffraction analysis) methods. The lubrication, reciprocating motion, and low velocity result in low friction and wear. The larger the imposed loads, the smaller the frictional force, and the larger the wear rate. The machine learning (ML) concept is incorporated in this study to identify the patterns of datasets spontaneously and generate a prediction model for forecasting the data, which are out of the experimental range. It can be desired that the outcomes of this research will contribute to the improvement in versatile engineering fields, such as automotive, robotics, and complex motion-based mechanisms where multidimensional motion cannot be ignored.

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Section: Resultsmentioning

confidence: 99%

Effects of Self-Lubricant Coating and Motion on Reduction of Friction and Wear of Mild Steel and Data Analysis from Machine Learning Approach

et al. 2021

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“…Reliability studies of valve-seat insert mainly focus on their failure mechanisms, friction and wear characteristics, and materials they used [52]. Therefore, it is necessary to discuss the wear mechanism of the cast iron group 1 and cladding group 1.…”

Section: Wear Mechanismsmentioning

confidence: 99%

Improvement of impact wear properties of seat insert by laser cladding cobalt-based alloy

Qu¹,

Duan²,

Hu³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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The impact wear properties of two different contact pairs, N80A valve-cast iron seat insert (cast iron group) and N80A valve-clad seat insert (cladding group), were studied in this work. In this paper, an independently designed tribo-tester combined with a depth gauge and corresponding auxiliary devices can record the axial subsidence of the contact pairs during the entire worn process. The results showed that during the 5 × 106 impact test, cast iron groups and cladding groups followed the worn process curve, and all went through the running-in stage and the stable worn stage. However, at each stage, the subsidence of cladding groups was smaller than that of cast iron groups. The roughness meter not only recorded the roughness of all samples before and after the test, but also can obtain the respective subsidence of the samples through the difference between the profiles before and after the test. The results can be mutually corroborated with the axial subsidence measured by the depth gauge. As a result, the roughness of the sealing surfaces of all valve-seat inserts increased significantly after the impact test. The total worn subsidence of the cast iron groups was about 1.61 times that of the cladding groups. The worn morphology was further studied by scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The cast iron group mainly experienced serious adhesive wear and oxidation wear, while the cladding group mainly experienced fatigue wear, oxidative wear and abrasive wear.

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Effect of load on the tribo-performance of 23-8N valve steel against GGG-60 seat material

Cited by 2 publications

References 11 publications

Effects of Self-Lubricant Coating and Motion on Reduction of Friction and Wear of Mild Steel and Data Analysis from Machine Learning Approach

Effects of Self-Lubricant Coating and Motion on Reduction of Friction and Wear of Mild Steel and Data Analysis from Machine Learning Approach

Improvement of impact wear properties of seat insert by laser cladding cobalt-based alloy

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