Preparation Methods for Lower Bainite after a Continuous Austempering Treatment of Thin Sheets of the Eutectoid Cold Work Steel 80CrV2 (1.2235)
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C. Holm
Christopher Holm is a metallographer and certified materials engineer educated in Solingen and Duisburg. Since 2018 he is working in the research dept. of the Forschungsgemeinschaft Werkzeuge und Werkstoffe e.V. in Remscheid. Beside steel and bainite he is working on Ni-Ti, Cu alloys, stellites and composite materials.
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H.-J. Gittel
Hans-Jürgen Gittel is material scientist educated at Technical University Dresden and has a long history in tooling industry. Actually, he is responsible for Project Marketing at Forschungsgemeinschaft Werkzeuge und Werkstoffe Remscheid e.V. and leads the research project subjected to this paper
Abstract
Strip material with a thickness of 0.85 m was austempered in a suitable continuous hardening furnace for the further development of blade body steels used for thin-cutting circular and band saw blades. This work also comprised the search for a rather straightforward metallographic preparation procedure allowing for a reliable identification of the microstructure and microstructural constituents. The prepared microstructure can be revealed using Nital or Beraha and LePera etching solutions. None of the three etchants allows a reliable and reproducible distinction of the microstructural constituents of the extremely fine-grained lower bainite using light-optical techniques. Only the use of the scanning electron microscope at higher magnifications allows a reliable identification of the characteristic bainite fiber bundles. For this examination, etching with Nital is recommended.
Kurzfassung
Für eine Weiterentwicklung der Stammblattstähle für Dünnschnittkreis- und Bandsägeblätter wurde Bandmaterial mit 0,85 mm Dicke in einer geeigneten Durchlaufhärteanlage bainitisiert. Bestandteil der Arbeiten war auch die Suche nach einem möglichst einfachen metallografischen Präparationsverfahren zum sicheren Identifizieren des Gefüges bzw. der Gefügebestandteile. Das präparierte Gefüge lässt sich mit Nital und den Ätzlösungen nach Beraha und LePera entwickeln. Lichtoptisch lassen sich die Gefügebestandteile des extrem feinkörnigen unteren Baint mit keinem der drei Ätzmittel sicher und reproduzierbar unterscheiden. Erst am Rasterelektronenmikroskop lassen sich bei höheren Vergrößerungen die bainittypischen Faserbündel sicher identifizieren. Für diese Untersuchung ist die Ätzung mit Nital empfehlenswert.
About the authors
Christopher Holm is a metallographer and certified materials engineer educated in Solingen and Duisburg. Since 2018 he is working in the research dept. of the Forschungsgemeinschaft Werkzeuge und Werkstoffe e.V. in Remscheid. Beside steel and bainite he is working on Ni-Ti, Cu alloys, stellites and composite materials.
Hans-Jürgen Gittel is material scientist educated at Technical University Dresden and has a long history in tooling industry. Actually, he is responsible for Project Marketing at Forschungsgemeinschaft Werkzeuge und Werkstoffe Remscheid e.V. and leads the research project subjected to this paper
References / Literatur
[1] Bain, E.C.: Alloying Elements in Steel. ASM, Cleveland, Ohio, USA, 1939Search in Google Scholar
[2] Bailey, E.F.: Trans. A. SM 46 (1954) 830 - 854 DOI: 10.1021/ie50539a042Search in Google Scholar
[3] Hehemann, R.F. et al: Trans. A. SM 49 (1957) 409–42610.2307/3755693Search in Google Scholar
[4] Edwards, D.P.: JISI 207 (1969) 1494–1502 DOI: 10.1001/jama.1969.03150210086011Search in Google Scholar
[5] Bhadeshia, H.K.D.H.: Bainite in Steels. IOM Communications Ltd., London, 2001Search in Google Scholar
[6] Britz, D.: Stahlgefüge besser verstehen – Kontrastierung, Bildanalyse und Klassifizierung niedriglegierter Stähle, Saarbrücken, 2018Search in Google Scholar
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- Contents
- Editorial
- Effect of Heat Treatment on the Microstructure of Cast Martensitic Stainless Steel
- Vibratory Polishing – A Preparation Technique for Demanding Tasks in Microstructural Characterization
- Preparation Methods for Lower Bainite after a Continuous Austempering Treatment of Thin Sheets of the Eutectoid Cold Work Steel 80CrV2 (1.2235)
- Scaling of Steam Turbine Control Valve Guidance Pins
- Picture of the Month
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Articles in the same Issue
- Contents
- Editorial
- Effect of Heat Treatment on the Microstructure of Cast Martensitic Stainless Steel
- Vibratory Polishing – A Preparation Technique for Demanding Tasks in Microstructural Characterization
- Preparation Methods for Lower Bainite after a Continuous Austempering Treatment of Thin Sheets of the Eutectoid Cold Work Steel 80CrV2 (1.2235)
- Scaling of Steam Turbine Control Valve Guidance Pins
- Picture of the Month
- Picture of the Month
- PM-News
- PM-News
- Meeting Diary
- Meeting Diary
