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International Journal of Corrosion
Volume 2011 (2011), Article ID 615197, 5 pages
http://dx.doi.org/10.1155/2011/615197
Research Article

The Thickness Distribution of Oxidation Film on Tapered Pipe Surface in Dieless Drawing

1Key Laboratory of Advanced Processing Technology of Materials Ministry of Education, University of Science and Technology Beijing, Beijing 100083, China
2School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China

Received 29 November 2010; Revised 20 February 2011; Accepted 17 March 2011

Academic Editor: Willem J. Quadakkers

Copyright © 2011 Fang Qin et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The thickness distribution of oxidation film on the surface of AISI304 stainless steel tapered pipe, its influence factors, and the effect of metal matrix deformation on oxidation behavior during dieless drawing were studied in this paper. The results showed that oxidation rate was affected strongly by induction heating temperature and deformation degree. The thickness distribution of oxidation film was uneven and increased from the larger diameter end to the smaller diameter end along the axial direction of tapered pipe. When induction heating temperature raised or the distance between heat and cold sources was increased, or feed speed was decreased, oxidation rate was accelerated and oxidation film on the tapered pipe surface thickened significantly, due to massive cracks in oxidation film induced by deformation of metal matrix. The density and width of cracks in oxidation film were enlarged, and the thickness of oxidation film increased with the increase in deformation degree.