Ductile Iron, S0050A Cast Steel, and D2 Tool Steel, Along with Inserse of Three Tested Materials, with Lubricant AMounts and Surface Treatments Typically Use in Stamping.

　　Because the Insert Had A 1.5-MM Radius on the Edge, The Effect of the Edge of the Contory BetWeen The Strip and the Die Insert Was Less Pronrent.

　　If sheet material deposite on the insert summer, research, the deposit with 1,200-grit sandpaper, then userdone to remove dirt and partition.

　　testing area.

　　Resistance from the testd sheet metal occurred.

　　Between two opposing flat inserts, and cof is called the formula μ = f?/2f? (see Figure 2).

　　Begins to rise at 70 kn of force.

　　Increased, more scratches around unable galling was observed at 70-kn force.

　　Started at 13-kn clamping force.

　　.2 of 61AUS, Galling Started at 26 MPa of Average Contory Pressure. For the saying inserts with dc2-90, galling started at 28 mpa, and dry inserts showed galling at 7 mpa.

　　, It Started at 7 mpa.