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Table 3.

Conditions used for hot hat-shaped bending including semi-punching.

Heating temperature and time 930 °C and 3.3 s
Current for heating 7.7 kA
Transferring time 2.0 s
Bending temperature 850 °C
Holding time at bottom dead centre 5 s
Bending speed 70 mm/s
Clearance c = 0%
Remainder rate r = 15%

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