(Solved): c) A low-carbon steel with 200 mm wide fed through rolling operations is to be used to reduce the ...

c) A low-carbon steel with 200 mm wide fed through rolling operations is to be used to reduce the thickness from 50 mm to 15 mm in a reversing two-high mill. The entrance speed of the plate = 30 m/min. Roll diameter = 300 mm, and coefficient of friction between rolls and work = 0.18. The specification is that the draft is to be equal on each pass. Strength coefficient = 600 MPa, and strain hardening exponent=0.25. Determine: i. maximum draft for this operation (2 marks) ii. minimum number of passes required (2 marks) iii. Draft per passes and draw the rolling design system based on the calculation (3 marks)