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Metals
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Rolling Process of Metallic Materials
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Rolling Process of Metallic Materials

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Casting, Forming and Heat Treatment".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 8264

Special Issue Editor

Prof. Dr. Xuedao Shu

E-Mail Website
Guest Editor
Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China
Interests: coatings; crack formation; cross-wedge rolling; titanium alloy; boundary element
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Special Issue on the "rolling process of metallic materials" in Metals will focus on recent advances in the science and technology related to rolling forming of alloys and steels. The topics will cover the whole field of metal rolling, from the development of new rolling processes and equipment, to macro-forming quality and microstructure performance, to final application and, increasingly, the issues of sustainability and end of life.

In this Special Issue, original research articles and reviews are welcome. This Special Issue will cover all aspects of material analysis, forming process, deformation characteristics and microstructure evolution, including:

  • Innovative rolling process and equipment;
  • Skew rolling technologies for metals;
  • Cold/warm/hot rolling technologies for metals;
  • Cross wedge rolling and ring rolling technology;
  • The relationship between forming process and microstructure properties of various metallic materials;
  • Combination of other forming processes and rolling processes;
  • Numerical simulation and experiments of skew rolling processes;
  • Microstructural/mechanical characterization techniques of metals;
  • Fatigue properties of metals.

Prof. Dr. Xuedao Shu
Guest Editor

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. Metals 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

  • forming
  • alloy and steel rolling
  • numerical simulation and experiment
  • skew rolling
  • cross wedge rolling
  • ring rolling
  • characterization
  • microstructure
  • mechanical property

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (4 papers)

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Research

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22 pages, 18947 KiB  
Article
Effect of Preheating on the Mechanical Workability Improvement of High-Strength Electrical Steels during Tandem Cold Rolling
by František Kováč, Ivan Petryshynets, Róbert Kočiško, Patrik Petroušek and Ladislav Falat
Metals 2023, 13(8), 1415; https://doi.org/10.3390/met13081415 - 8 Aug 2023
Viewed by 1609
Abstract
Cold-rolled silicon steel strip products are widely used as the main soft magnetic components in cores of electrical motors, generators, and transformers. In the case of rotating electrical machines, the so-called non-oriented electro-technical steels are normally applied. They are characterized by a similar [...] Read more.
Cold-rolled silicon steel strip products are widely used as the main soft magnetic components in cores of electrical motors, generators, and transformers. In the case of rotating electrical machines, the so-called non-oriented electro-technical steels are normally applied. They are characterized by a similar behaviour to the induced magnetic field found in all sheet plane directions. The kind of soft magnetic alloys that defined herein not only possess an isotropy of electromagnetic properties, but also high mechanical strength; such alloys are called high-strength electro-technical (HSET) steels. These commercially produced HSET steels contain a high silicon content in the range of 3–4 wt.%. However, if the silicon content exceeds 3%, the machinability of Fe–Si alloys is dramatically reduced and they become much more brittle as a consequence. According to this, regular hot band brittle damage occurs during cold deformation at a high-speed tandem rolling mill. In accordance with these reasons, the production of thin high-strength silicon steel grades using the traditional methods of cold rolling deformation is extremely problematic and it is characterised by a high degree of steel sheet mechanical damage. In this scientific work, the effect of preheating hot-rolled strips on their mechanical workability improvement during tandem cold rolling was investigated. The results of this study indicate that the cold rolling of hot bands at elevated temperatures increases their resistance to brittle failure and mechanical plasticity. Moreover, the mathematical simulation clearly demonstrates that residual stress is distributed relatively homogeneously across the thickness of samples, which were cold rolled at 100 °C in contrast to the same ones deformed at room temperature. Full article
(This article belongs to the Special Issue Rolling Process of Metallic Materials)
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21 pages, 24301 KiB  
Article
Mechanism and Control Scheme of Central Defects in Cross Wedge Rolling of Railway Vehicle Axles
by Wenhui Sun, Xuan Wu and Cuiping Yang
Metals 2023, 13(7), 1309; https://doi.org/10.3390/met13071309 - 21 Jul 2023
Cited by 2 | Viewed by 1467
Abstract
Faced with a great demand for railway axles, the cross wedge rolling (CWR) process has the advantages of high efficiency and material saving, and good forming quality of axles is significant for railway transportation safety. The stress inside the railway axle of CWR [...] Read more.
Faced with a great demand for railway axles, the cross wedge rolling (CWR) process has the advantages of high efficiency and material saving, and good forming quality of axles is significant for railway transportation safety. The stress inside the railway axle of CWR was analyzed by the finite element method. It was found that the center of the rolled piece is subjected to tensile stress in transverse and axial directions and compressive stress in radial direction, making it more prone to defects. By simulating the evolution of micro voids in the center of the CWR piece, it was found that the presence of voids makes the strain around them significantly large and concentrated and the material between the voids deforms intensely. When voids expand relative to the rolled piece and the internal necking between voids is significant, void coalescence is easy to occur, and central defects are formed. The influence of process parameters on void evolution was analyzed. The scheme of detaching die was proposed to avoid central defects of the CWR piece and the optimal parameter conditions of CWR of railway axles were determined, which proved that the quality of railway axles formed with optimized parameters meets the technical requirements of railway vehicle axles. Full article
(This article belongs to the Special Issue Rolling Process of Metallic Materials)
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19 pages, 5970 KiB  
Article
New Analytical Model for Determining the Roll Pitch Diameter in Three-Roll Continuous Retained Mandrel Rolling
by Zhaohui Wei and Chunjing Wu
Metals 2023, 13(2), 304; https://doi.org/10.3390/met13020304 - 2 Feb 2023
Cited by 1 | Viewed by 1879
Abstract
The continuous tube-rolling method has been widely used to manufacture high-quality seamless pipes and tubes. However, the analytical model for determining the roll pitch diameter in three-roll continuous retained mandrel rolling from first principles has not yet been presented, which has, thus, hindered [...] Read more.
The continuous tube-rolling method has been widely used to manufacture high-quality seamless pipes and tubes. However, the analytical model for determining the roll pitch diameter in three-roll continuous retained mandrel rolling from first principles has not yet been presented, which has, thus, hindered the development of rolling control technology in tube manufacturing. In this work, a new analytical model has been established from the force–equilibrium principles. The modelling has taken the tube-roll contact geometry, roll pressure, mandrel pull forces, inter-stand tensions, and friction coefficients into account for its formulations. Seen from the experimental results of the rolling at the plant, the maximum deviation of the predicted projected contact area is less than 6% and the maximum deviation of the calculated roll speed from the satisfactory data in field operation is less than 3.9%. The proposed model has enabled the influence of the friction coefficients on the roll pitch diameter to be quantified in theoretical analysis, and it was found that the changing amplitude of the theoretical roll pitch diameter corresponding to the commonly used data range of the friction coefficients can be above 9%. Having overcome the shortcomings of the empirical model, this model has the required prediction accuracy and flexibility for being applied to flexible tube rolling. By building the key algorithms around physical models, this modelling has advanced not only the rolling control at the plant, but also our scientific understanding of the mechanics of the continuous tube-rolling process. Full article
(This article belongs to the Special Issue Rolling Process of Metallic Materials)
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Review

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18 pages, 15974 KiB  
Review
Analysis and Prospect of Precision Plastic Forming Technologies for Production of High-Speed-Train Hollow Axles
by Xuedao Shu, Caoqi Ye, Jitai Wang, Yingxiang Xia, Song Zhang, Ying Wang, Haijie Xu and Yimin Deng
Metals 2023, 13(1), 145; https://doi.org/10.3390/met13010145 - 10 Jan 2023
Cited by 8 | Viewed by 2353
Abstract
The hollow axle is the key basic component of high-speed trains. How to realize its production with short process and high-quality precision plastic forming is the frontier of current research and a major problem to be solved. On the basis of analyzing the [...] Read more.
The hollow axle is the key basic component of high-speed trains. How to realize its production with short process and high-quality precision plastic forming is the frontier of current research and a major problem to be solved. On the basis of analyzing the advantages and disadvantages of the existing forging process of the hollow axle, this paper expounds the principles and characteristics of multi-wedge synchrostep cross-wedge rolling (MSCWR) technology, multi-roll cross-wedge rolling (MCWR) technology, three-roll skew rolling (TRSR) technology, and tandem flexible skew rolling (TFSR) technology in detail, and discusses the feasibility and key technical problems of these technologies to form the hollow axle. It is concluded that tandem flexible skew rolling (TFSR) technology has the advantages of short process, high quality, high efficiency, energy saving, and material saving, and this technology is the development direction of precision plastic forming of the hollow axle. The research results provide technical guidance and research directions for promoting global high-speed rail development. Full article
(This article belongs to the Special Issue Rolling Process of Metallic Materials)
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