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Metals
Special Issues
Recent Advances in Tool and High Speed Steel
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Recent Advances in Tool and High Speed Steel

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 January 2022) | Viewed by 4604

Special Issue Editor

Prof. Dr. Massimo Pellizzari

E-Mail Website
Guest Editor
Department of Industrial Engineering, University of Trento, 38123 Trento, Italy
Interests: tool steel; high speed steel; duplex stainless steels; beta-Ti; metal matrix composites; heat treatment; cryogenic treatment; surface engineering; mechanical milling and alloying; spark plasma sintering; additive manufacturing
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Tool and high-speed steels represent an important class of materials for the manufacture of moulds, cutting tools, punches, dies, rolls, and many other components. Their performance is closely related to the materials’ properties, which, in turn, are the result of a complex manufacturing process that includes steelmaking, thermomechanical processing, and heat and surface treatment. Although many of the steels used today were formulated several decades ago, the development of new grades has continued into the present thanks to modern modeling software. Traditional production technologies, such as electric arc steelmaking, rather than powder metallurgy processes (e.g., hot isostatic pressing), have been combined with novel powder metallurgy techniques based on activated sintering (e.g., spark plasma sintering) and, more recently, additive manufacturing (e.g., laser powder bed fusion, direct metal deposition), which allow us to produce near net shape components with a complex geometry and a tailored microstructure. The optimization of heat, cryogenic, and surface treatments is essential to obtain the optimal combination of microstructure and properties.

The goal of this Special Issue of Metals is to present a collection of original research articles related to the development of tool and high-speed steels. High-quality papers from researchers in the scientific community and industry are welcome.

Assoc. Prof. Massimo Pellizzari
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

  • alloy design
  • steelmaking
  • casting
  • powder metallurgy
  • additive manufacturing
  • heat treatment
  • surface engineering
  • microstructure
  • toughness
  • thermal fatigue
  • wear

Published Papers (2 papers)

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Research

21 pages, 8095 KiB  
Article
Microstructure, Mechanical Properties, and Thermal Stability of Carbon-Free High Speed Tool Steel Strengthened by Intermetallics Compared to Vanadis 60 Steel Strengthened by Carbides
by Alena Michalcová, Vojtěch Pečinka, Zdeněk Kačenka, Jan Šerák, Jiří Kubásek, Pavel Novák and Dalibor Vojtěch
Metals 2021, 11(12), 1901; https://doi.org/10.3390/met11121901 - 25 Nov 2021
Cited by 7 | Viewed by 1674
Abstract
High speed tool steels are materials that exhibit superior mechanical properties (e.g., high hardness). They should also be resistant to thermal exposure to maintain high hardness during the machining process. In this paper, a C-free tool steel formed of Fe matrix and a [...] Read more.
High speed tool steels are materials that exhibit superior mechanical properties (e.g., high hardness). They should also be resistant to thermal exposure to maintain high hardness during the machining process. In this paper, a C-free tool steel formed of Fe matrix and a Mo6Co7 intermetallic phase was studied. This steel was compared to the well-known Vanadis 60 steel containing Fe matrix and carbides. Microstructures were investigated by scanning (SEM) and transmission (TEM) electron microscopy, and the mechanical properties and thermal stability of both materials were compared. It was proven that the strengthening in the Vanadis 60 steel was mainly caused by the carbides, while the C-free steel was strengthened by the Mo6Co7 phase. The hardness values of both materials were comparable in the utilization state (approx. 950 HV). The hardness of Vanadis 60 steel decreased after several minutes of annealing at 650 °C under the value that enables material utilization. The hardness value of the steel strengthened by the intermetallics also decreased but significantly slower. Based on these results, the main finding of this study is that the C-free steel exhibited much better thermal stability and may be utilized at higher temperatures for longer periods of time than Vanadis 60. Full article
(This article belongs to the Special Issue Recent Advances in Tool and High Speed Steel)
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11 pages, 10230 KiB  
Article
Precipitation Behaviors of Carbides in High Speed Steel during ESR and Heat Treatment
by Yang Liu, Jing Li, Wei Liang, Jiawei Gao, Yongfeng Qi and Chengjia Shang
Metals 2021, 11(11), 1781; https://doi.org/10.3390/met11111781 - 05 Nov 2021
Cited by 4 | Viewed by 1846
Abstract
The microstructure and carbides evolution of high-speed steel after electroslag remelting and solution treatment were studied. The thermodynamic precipitation mechanism of carbides in solid phase was discussed and the characteristic parameters of carbides in different processes were also investigated. The results show that [...] Read more.
The microstructure and carbides evolution of high-speed steel after electroslag remelting and solution treatment were studied. The thermodynamic precipitation mechanism of carbides in solid phase was discussed and the characteristic parameters of carbides in different processes were also investigated. The results show that there were large lamellar and fibrous Mo2C and a small amount of VC in the ESR ingot. Mo2C are metastable carbides, which can be decomposed into VC and Fe2Mo4C during the solution treatment. The average diameter of the carbides is reduced to 1.28 μm and the space distance is reduced to 3.23 μm after forging and hot rolling, which means carbides are completely spheroidal and dispersed in matrix. Full article
(This article belongs to the Special Issue Recent Advances in Tool and High Speed Steel)
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