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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

Published 4 issues per year

ISSN Print: 1093-3611

ISSN Online: 1940-4360

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.4 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00005 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.07 SJR: 0.198 SNIP: 0.48 CiteScore™:: 1.1 H-Index: 20

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OPTIMIZATION OF PLASMA ARC CUTTING OF MILD STEEL THIN PLATES

Volume 13, Issue 3-4, 2009, pp. 267-285
DOI: 10.1615/HighTempMatProc.v13.i3-4.20
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ABSTRACT

Plasma arc cutting processes (PAC) of mild steel thin plates through a Cebora HQC Plasma Prof 164 plasma source, operating in the range 25−120 A, with a Cebora CP250G plasma torch have been studied. Plasma arc cutting of mild steel thin plates (thickness in the range 1−3 mm) is characterized by low current levels (25−45 A) and the use of O2 both as plasma gas and secondary gas. Intrinsic critical aspects initially pointed out concern both cut quality (unevenness of the cut, inclination of the cut surfaces and dross formation) and performance of the consumables (rapid and severe nozzle wear). The aim of the work is to report on the optimization procedure of PAC of mild steel thin plates, carried out with respect to both cut quality and, to achieve high cut quality standards, high performances of the consumables and productivity levels otherwise obtainable with laser cutting processes through the simultaneous planning and analysis of experimental tests and numerical simulations. Experimental tests have allowed a better design of consumables (in particular nozzle, electrode and gas diffusers) and the optimization of current profiles (in particular current levels during pilot arcing); on the other side, modeling and numerical simulation have allowed a better understanding of the physical phenomena evidenced by experimental results and to suggest successful design solutions. The integration of the results of these two activities has allowed the overcoming of the critical aspects initially pointed out, improving plasma jet constriction and reducing plasma jet instabilities, to obtain better cut quality and better performance of the consumables.

CITED BY
  1. Colombo V, Concetti A, Ghedini E, Dallavalle S, Design oriented simulation for plasma arc cutting consumables and experimental validation of results, Plasma Sources Science and Technology, 20, 3, 2011. Crossref

  2. Cantoro G, Colombo V, Concetti A, Ghedini E, Sanibondi P, Zinzani F, Rotundo F, Dallavalle S, Vancini M, Plasma arc cutting technology: simulation and experiments, Journal of Physics: Conference Series, 275, 2011. Crossref

  3. Long Nguyen Phi, Katada Yusuke, Tanaka Yasunori, Uesugi Yoshihiko, Yamaguchi Yoshihiro, Cathode diameter and operating parameter effects on hafnium cathode evaporation for oxygen plasma cutting arc, Journal of Physics D: Applied Physics, 45, 43, 2012. Crossref

  4. Colombo V., Concetti A., Ghedini E., Rotundo F., Sanibondi P., Boselli M., Dallavalle S., Gherardi M., Nemchinsky V., Vancini M., Advances in Plasma Arc Cutting Technology: The Experimental Part of an Integrated Approach, Plasma Chemistry and Plasma Processing, 32, 3, 2012. Crossref

  5. Pekker L, Hussary N, Effect of boundary conditions on the heat flux to the wall in two-temperature modeling of ‘thermal’ plasmas, Journal of Physics D: Applied Physics, 47, 44, 2014. Crossref

  6. Pekker Leonid, Hussary Nakhleh, Boundary conditions at the walls with thermionic electron emission in two temperature modeling of “thermal” plasmas, Physics of Plasmas, 22, 8, 2015. Crossref

  7. Pekker L., A Sheath Collision Model with Thermionic Electron Emission and the Schottky Correction Factor for Work Function of Wall Material, Plasma Chemistry and Plasma Processing, 37, 3, 2017. Crossref

  8. Nemchinsky Valerian, Heat Transfer in Plasma Arc Cutting, in Handbook of Thermal Science and Engineering, 2017. Crossref

  9. Thermal Plasmas: Boundary Conditions on Heat Flux, in Encyclopedia of Plasma Technology, 2016. Crossref

  10. Nemchinsky Valerian, Heat Transfer in Plasma Arc Cutting, in Handbook of Thermal Science and Engineering, 2018. Crossref

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