publication . Article . 2008

INFLUENCE OF MICRO-SEGREGATION IN PB-S-ALLOYED FREE MACHINING STEELS ON THE SURFACE QUALITY OF THE ROLLED WIRE-ROD

Leuschke, U.; Rajesh Puvvada, N.; Puvvada, Rajesh;
Open Access English
  • Published: 29 May 2008 Journal: La Metallurgia Italiana (issn: 0026-0843, eissn: 0026-0843, Copyright policy)
  • Publisher: La Metallurgia Italiana
Abstract
Free machining steel billets were manufactured at the continuous casting machine. The manufactured billets did not exhibit any kind of surface defects but surface cracks and slivers appeared when the billets were rolled into wires and rods at the wire-rod mill. The defects on rolled wire-rod have been detected by a hot eddy current system. Further investigations in these defects with the help of microprobe analysis system and scanning electron microscope equipped with image analysis system revealed micro-segregation of the elements manganese, sulphur and phosphorous in the interdendritic zones.

[1] Wolfgang Goerke, Mario Endler, Rolf Grünewald und Thomas Berner: Integration einer automatischen Heißdrahtprü- fanlage in einem dreiadrigen Drahtwalzwerk; Stahl und Eisen Band 119 (1999), Heft 10, S.61 - 65

[2] H.Jacobi: Mikroseigerung und Einschlussbildung bei der Erstarrung in K. Schwerdtfeger (Hrsg): Metallurgie des Stranggießens Verlag Stahleisen, Düsseldorf, 1992, 125-170

[3] Naga Rajesh Puvvada: Influence of casting parameters on the micro-structure of the direct cast billet and the surface quality of the wire-rod, unpublished Diploma thesis IEHK RWTH Aachen 2005.

[4] Schwerdtfeger, Klaus: Einfluß der Erstarrungsgeschwindigkeit auf die Mikroseigerung und die interdendritische Ausscheidung von Mangansulfideinschlüssen in einem Mangan und Kohlenstoff enthaltenden Stahl; Archiv für das Eisenhüttenwesen JG 41 (1970), Heft 9, S. 923-937

[5] Senk D., Safi M.; Hamadou H.: Effect of mould flux on the solidifying steel in the meniscus region of continuous casting mould; 5th Continuous Casting Conference, 2005, Vol. S. 656ff

[6] Senk D.; Safi M., Münch A.: Surface solidification behaviour of micro-alloyed steels under continuous casting conditions, Steel research international 74 (2003) Heft 11/12 679-685

[7] Hamadou Heikel: Experimentelle und numerische Makround Mikromodellierung der Strukturentwicklung beim Stranggießen von Stahl; Dr. Ing. Diss.: IEHK, RWTH-Aachen 2005 Shaker Verlag Band 11/2006 ISBN: 3-8322-5616-4

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