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http://dx.doi.org/10.5228/KSPP.2005.14.7.628

The Drawbility Estimation in warm and Hot Forming of AB31B Magnesium Sheet  

Choo, D. K. (부산대학교 정밀기계공학과)
Oh, S. W. (부산대학교 정밀기계공학과)
Lee, J. H. (동아대학교 신소재공학과)
Kang, C. G. (부산대학교 기계공학부)
Publication Information
Transactions of Materials Processing / v.14, no.7, 2005 , pp. 628-634 More about this Journal
Abstract
The drawability of AZ31B magnesium sheet is estimated at various temperatures (200, 250, 300, 350, $400^{\circ}C$), forming speeds (20, 50, 100mm/min), thicknesses (0.8, 1.4mm) and blank holding forces (2.0, 2.8, 3.4kN). The deep drawing process (DDP) of circular cup is used in forming experiments. The results of deep drawing experiments show that the drawability is well at the range from 250 to $300^{\circ}C$, 50mm/min forming speed and 2.0kN blank holding force. The 0.8mm magnesium sheets were deformed better than 1.4 mm. Blank holding force was controlled in order to improve drawability and prevent the change of cup thickness. When blank holding force was controlled, tearing and thickness change were decreased and limit drawing ratio was improved from 2.1 to 3.0.
Keywords
Drawability; AZ31B Magnesium Sheet; Deep Drawing Process; Limit Drawing Ratio; Blank Holding Force;
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