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Characterisation of galvanneal coatings on strip steel

Long, John, Haynes, D.A. and Hodgson, Peter 2004, Characterisation of galvanneal coatings on strip steel, Materials forum, vol. 27, pp. 62-67.

Document type: Journal Article
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Title Characterisation of galvanneal coatings on strip steel
Author(s) Long, John
Haynes, D.A.
Hodgson, Peter
Journal name Materials forum
Volume number 27
Start page 62
End page 67
Publisher IMEA
Place of publication North Melbourne, Vic
Publication date 2004
ISSN 1447-6738
Summary Galvanneal is a form of zinc-coated sheet steel, where steel is dipped in molten zinc, and then heat treated in a furnace to produce a complex iron-zinc coating. Many industries, such as automotive, use galvanneal for components fabricated from sheet steel. The microstructural properties of galvanneal have a significant influence on how well the sheet metal changes shape on stamping. By means of optical microscopy, scanning electron microscopy, and glow-discharge optical emission spectrometry, we present a study of the microstructure of several galvanneal samples, both stamped and unformed, relating the phases and morphology of the coatings to performance in stamping operations. Samples of galvanneal were subjected to different heat-treatment temperatures. The frequency of defects in stamped components was found to be related to the average alloy content in the coatings, which varied with furnace temperature. An increased average iron content in the coatings was related to increased powdering defects in stamping operations that use galvanneal coated sheet steel.
Notes Reproduced with the specific permission of the copyright owner.
Language eng
Field of Research 091499 Resources Engineering and Extractive Metallurgy not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©Institute of Materials Engineering Australasia Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30002639
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