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Lubricants
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Tribology in Processing and Application of Steels
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Tribology in Processing and Application of Steels

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 6741

Special Issue Editors

Dr. Liang Jiang

E-Mail Website
Guest Editor
Tribology Research Institute, State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China
Interests: nanotribology; chemical mechanical polishing
Dr. Binghai Lyu

E-Mail Website
Guest Editor
College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou 310032, China
Interests: shear thickening polishing; abrasive machining; abrasive wear
Dr. Yanjun Han

E-Mail Website
Guest Editor
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Interests: fluid jet/air jet polishing; novel polishing process

Special Issue Information

Dear Colleagues,

We would like to invite submissions to this topic on “Tribology in Processing and Application of Steels”. As the most widespread materials, steels have been used in the mechanical industry due to their impressive properties. Many tribological problems are involved in the processing and application of steels. For moving mechanical components such as bearings and gears, the accuracy and integrity of working surfaces can significantly influence their service performance and reliability. Many ultra-precision processing technologies have been developed and applied, such as jet polishing, shear-thickening polishing, chemical mechanical polishing, and their combinations. The polishing process involves micro- and nano-wear. Meanwhile, the working process of bearings and gears involves friction and lubrication. Superlubricity has recently been developed to improve lubrication performance, attracting much attention. The tribological issues involved in the processing and application of steels merit further investigation. This topic on “Tribology in Processing and Application of Steels” includes but is not limited to micro- and nano-wear in steel processing, and friction and lubrication in steel application.

We sincerely invite you to publish your research in this Special Issue.

Dr. Liang Jiang
Dr. Binghai Lyu
Dr. Yanjun Han
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Lubricants is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • tribology
  • wear
  • friction
  • lubrication
  • steel
  • polishing
  • bearing
  • gear

Published Papers (4 papers)

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Research

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14 pages, 8112 KiB  
Article
Lubricant-Free Thermoforming Mold Using Pulse Electrochemical Polishing
by Seong Ung Kwak, Uk Su Kim and Jeong Woo Park
Lubricants 2023, 11(9), 373; https://doi.org/10.3390/lubricants11090373 - 04 Sep 2023
Viewed by 842
Abstract
Thermoforming (TF) is a process used for fabricating products by applying heat and vacuum pressure to a plastic film or plate. Typically, TF molds require post-processing, resulting in additional costs and time consumption. Furthermore, continuous application of lubricant is necessary to prevent corrosion [...] Read more.
Thermoforming (TF) is a process used for fabricating products by applying heat and vacuum pressure to a plastic film or plate. Typically, TF molds require post-processing, resulting in additional costs and time consumption. Furthermore, continuous application of lubricant is necessary to prevent corrosion and facilitate mold release. Electrochemical polishing (ECP) is a technique used to achieve a polished surface on metal through an electrochemical reaction. In this research, a novel approach is proposed as a solution to the need for lubricants and manual post-processing in mold preparation, utilizing pulse electrochemical polishing (PECP). A comparative analysis is conducted on the reproducibility of products and the forces required for mold release among molds prepared using PECP, lubricated molds, and unpolished molds. To assess product reproducibility, the radii of curvature of all mold steps and grooves are determined and compared. Furthermore, peeling tests are conducted to estimate the forces required for mold release. Product surface evaluation is performed using atomic force microscopy, while lateral force microscopy is employed to measure the reductions in surface frictional force achieved by PECP. Full article
(This article belongs to the Special Issue Tribology in Processing and Application of Steels)
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15 pages, 18340 KiB  
Article
Experimental Study on Flexible Fiber Assisted Shear Thickening Polishing for Cutting Edge Preparation of Core Drill
by Lanying Shao, Yu Zhou, Yanfei Dai and Binghai Lyu
Lubricants 2023, 11(2), 58; https://doi.org/10.3390/lubricants11020058 - 31 Jan 2023
Cited by 1 | Viewed by 1203
Abstract
To improve the cutting performance of the core drill, the flexible fiber assisted shear-thickening polishing (FF-STP) for cutting edge preparation was proposed to eliminate the microscopic defect and obtain proper radius of the cutting edge of the core drill. The flexible fiber was [...] Read more.
To improve the cutting performance of the core drill, the flexible fiber assisted shear-thickening polishing (FF-STP) for cutting edge preparation was proposed to eliminate the microscopic defect and obtain proper radius of the cutting edge of the core drill. The flexible fiber was introduced into the shear-thickening polishing process to break the thickened agglomerates and improve the efficiency of cutting edge preparation. The influence of the polishing speed, abrasive concentration and the flexible fiber contact length with the core drill on the cutting edge radius r and surface morphology of the core drill edge was analyzed, and the drilling experiments were carried out after preparation, the cutting heat and drilled holes’ roughness were employed as evaluation indexes to evaluate the performance of the core drill. The results show that the cutting edge radius increases with the increase of polishing speed, abrasive concentration and contact length. However, too high a polishing speed and contact length reduce the abrasive particles involved in the polishing process, and then lead to a decline in preparation efficiency. Under the selected processing conditions, the cutting edge radius increases from the initial 5 μm to 14 μm and 27 μm with 4 min of treatment and 6 min of treatment preparation, respectively. The sharp cutting edge becomes rounded, the burrs and chipping on the cutting edge are eliminated, and the average roughness (Ra) of the flank face decreases from 110.4 ± 10 nm to 8.0 ± 3 nm. Nine holes were drilled consecutively by core drills after cutting edge preparation, and the cutting temperature and drilled holes’ roughness were recorded. The maximum cutting temperature (122.4 °C) in the process with the prepared core drill (radius r = 14 μm) is about 20 °C lower than that with untreated one, and the roughness of the drilled hole (Ra 510.5 nm) about 189.9 nm lower. The results indicates that FF-STP is a promising method for high consistency preparation of the core drill cutting edge. Full article
(This article belongs to the Special Issue Tribology in Processing and Application of Steels)
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16 pages, 4956 KiB  
Article
Attaining Ultra-Smooth 18CrNiMo7-6 Case Hardening Steel Surfaces with Chemical Mechanical Polishing
by Wumao Peng, Yang Gao, Liang Jiang, Jinwei Liu and Linmao Qian
Lubricants 2022, 10(9), 199; https://doi.org/10.3390/lubricants10090199 - 24 Aug 2022
Cited by 2 | Viewed by 2107
Abstract
Smooth surfaces are conducive to improving the lubrication of gears in mechanical systems. In this study, chemical mechanical polishing (CMP) was used to process 18CrNiMo7-6 case hardening steel, a typical material for gears. The results reveal that compared with formic acid and oxalic [...] Read more.
Smooth surfaces are conducive to improving the lubrication of gears in mechanical systems. In this study, chemical mechanical polishing (CMP) was used to process 18CrNiMo7-6 case hardening steel, a typical material for gears. The results reveal that compared with formic acid and oxalic acid, citric acid can be used as a suitable complexing agent without causing apparent corrosion, probably due to the fact of its relatively stable adsorption. A synergistic effect exists between citric acid and H2O2. At pH 3, with 0.067 M citric acid and 1 wt% H2O2, a satisfactory CMP performance (i.e., a 514 nm/min material removal rate (MRR) and a 0.85 nm surface roughness Sa) was achieved. After polishing, no observable defects were found on the surface, and no discernible processing damage occurred to the substrate. In terms of the CMP’s mechanism, iron is first oxidized to Fe2+ and Fe3+, which then react with citric acid to form complexes. On the one hand, most of the complexes may stay on the surface to prevent further corrosion and, thus, the surface quality is excellent. On the other hand, the complexes may reduce the surface integrity and, thus, the MRR is high. The findings open new avenues for attaining ultra-smooth steel surfaces with CMP through controlling corrosive wear. Full article
(This article belongs to the Special Issue Tribology in Processing and Application of Steels)
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Review

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24 pages, 6445 KiB  
Review
A Review on Magnetorheological Jet Polishing Technique for Microstructured Functional Surfaces
by Dunlan Song, Hongguang Du, Jieqiong Lin, Xiaoqin Zhou and Rongqi Wang
Lubricants 2022, 10(10), 237; https://doi.org/10.3390/lubricants10100237 - 26 Sep 2022
Cited by 4 | Viewed by 1911
Abstract
The magnetorheological jet polishing (MJP) technique, as a revolutionary flexible contact polishing approach, is exceptionally suitable for the smooth and ultra-smooth machining of functional surfaces with tiny or microstructures due to the following essential advantages. Machine tool accuracy is not required and there [...] Read more.
The magnetorheological jet polishing (MJP) technique, as a revolutionary flexible contact polishing approach, is exceptionally suitable for the smooth and ultra-smooth machining of functional surfaces with tiny or microstructures due to the following essential advantages. Machine tool accuracy is not required and there is nearly no tool wear in addition to high polishing efficiency, minimal surface damage, great surface shape adaptation, superior material removal process selectivity, and so on. This work examines the machining mechanism, the development of machining devices, and the optimization of the process parameters in MJP. This review also covers the MJP technique’s existing limitations and opportunities. Full article
(This article belongs to the Special Issue Tribology in Processing and Application of Steels)
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