Alternative Methods for Determining Microcleanliness: A Study Based on Hot Work Tool Steels

Wolfgang Schützenhöfer, Christina Decker, Bernhard Plank, Ernst Plesiutschnig

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem Konferenzband

Abstract

This study focuses on the development and comparison of standard a
nd alternative methods to evaluate the cleanliness of hot work tool steels
(for comparison reasons also other tool steels) used for dies on a microscopic level. The steels subjected to this study are hot working tool steels roduced by an electric arc furn ace and ladle furnace (abbreviation of the investigated materials: conv) . After re-melting by either an electric slag (abbrev. PESR) or a
vacuum arc furnace (abbrev. VAR), the forged or rolled specimen were taken as subject to investigate cleanliness with different methods. The typical
investigation method for non-metallic inclusions (NMI) is light optical microscopy (LOM) according to different standards such as ASTM E45, ISO 4967, DIN 50602, EN 10247, JIS G0555. For comparison, the alternative methods Gig
a Cycle Fatigue tests with automated SEM-EDS-investigations, electrolytic extraction and X-ray computed tomography (XCT) are applied. To obtain
comparative results from the standard and alternative methods, cylindrical
specimens with a circle diameter of ~ 2 mm and length ~20 mm used for XCT experiments were destructively investigated with automated LOM acc
ording to the LOM-standards as mentioned above and additionally statistical analysis on specific amount of NMI. Comparative results for the different pro
duction routes show a similar size of NMI within each method. Each method has its advantages and disadvantages concerning additional information, e.g. time for preparation and measurement and costs.
Originalspracheenglisch
TitelProceedings
Untertitel20th International Forgemasters Meeting - IFM 2017
Seiten1008-1017
Seitenumfang9
PublikationsstatusVeröffentlicht - 2017
Veranstaltung20th International Forgemasters Meeting - IFM 2017 - Congress Graz, Graz, Österreich
Dauer: 11 Sep 201715 Sep 2017

Konferenz

Konferenz20th International Forgemasters Meeting - IFM 2017
LandÖsterreich
OrtGraz
Zeitraum11/09/1715/09/17

Schlagwörter

  • non - metallic inclusions, cleanliness, special steels, electric arc furnace, electric slag remelting, vacuum arc remelting, light - optical - microscopy, scanning electron microscopy , energy dispersive X - ray spectroscopy , X - ray computed tomogr aphy, micro - CT

ASJC Scopus subject areas

  • !!Materials Science(all)

Fields of Expertise

  • Advanced Materials Science

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  • Dieses zitieren

    Schützenhöfer, W., Decker, C., Plank, B., & Plesiutschnig, E. (2017). Alternative Methods for Determining Microcleanliness: A Study Based on Hot Work Tool Steels. in Proceedings: 20th International Forgemasters Meeting - IFM 2017 (S. 1008-1017)