Abstract
The coefficient of friction of aluminum-coated 22MnB5 in hot stamping under dry condition is measured for various surface roughnesses of the die using a flat drawing test machine developed by the authors. The surfaces of the die after drawing are photographed and then analyzed using EDX in the SEM. On the basis of the experimental results, the friction behavior under dry condition is discussed. Moreover, the coefficient of friction of aluminum-coated 22MnB5 in hot stamping under lubricated condition is measured for various surface roughnesses of the dies and the effect of the lubrication on the coefficient of friction is discussed.
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