Investigation into the Deep Drawability of 0.1%C Eutectoid Steel
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Date
2012
Authors
Adeosun, S.O.
Sekunowo, O.I.
Balogun, S.A.
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Minerals and Materials Characterization and Engineering.
Abstract
The phenomenon of anisotropism in most rolled products necessitates that the rolling direction that enhances desirable
mechanical property is established. In this paper, the comparative deep drawability of as-received and annealed mild
steel containing about 0.1%C was investigated. The flat steel sample was divided into two and classified as as-received
and heat treated respectively. The heat treated sample was obtained by annealing at 950˚C after been soaked for 5 hours
and deep drawn at ambient temperatures (35˚C - 42˚C). From both samples, circular specimens were machine- blanked
parallel to the rolling directions inclined at 0˚, 45˚ and 90˚ respectively and were prepared for deep drawability test
while rectangular specimens were prepared for tensile test. Both specimens, as-received and annealed were then subjected to tensile, cupping and microstructural analyses. Results show that the contribution to increased formability at
90° rolling direction seems to have come from the spheroid-like pearlite grains induced during annealing while the stability of spread observed was achieved through a modest increase in strength. Thus, the resistance of annealed eutectoid
steel to cupping is quite minimal at 90° to the rolling direction. The desirable drawability characteristics developed by
the annealed eutectoid steel specimen are: cup-height, 30 mm maximum and ear, 6.4% maximum.
Description
Keywords
Eutectoid Steel; Drawability; Annealing; Cupping; Anistropism
Citation
Adeosun, S.O.; Sekunowo, O.I.; Balogun, S.A. (2012). Investigation into the Deep Drawability of 0.1%C Eutectoid Steel. Journal of Minerals and Materials Characterization and Engineering; 2012(11): 1034-1038