True or False if false fix the question 1 Ideal extrusion pr

True or False, if false fix the question.

1) Ideal extrusion pressure is proportional to extrusion ratio?

2) Control of stroke in closed die forging is very critical

3) Shot-pinning process produces no residual stresses.

Solution

1_true ,P=YlnR

2-true because the workpiece is deformed under high pressure and process provide precision forging with closed dimensions tolerance

3-false because produces a compressive residual stresses