Question

1). A casting has a 1,000 mm² surface area and 10,000 mm³ volume. The mold constant for this material is C_m = 0.1 min/mm²

a) Calculate the TST for this casting. Answer:  min

b) Calculate the size of a cubic riser attached to this casting assuming that its TST = 10 min. Answer:  mm

2). It is feasible to reduce the 20 mm initial thickness of a steel plate to 1 mm in a single rolling step?

True

False

Answer 1

m² A= 1000mm? V=10,000 cm= 0.1 min/mm2 T.S.T.= cm Car T.S.T:= 0.1 / 00o)%> comin n=2 o Vza² As= 692 T.S.T.: lomin = o.1 а- 6a2 I a=60mm 20 20 - . - as gatio= It's very high So stalement is False. /