1988 Volume 74 Issue 11 Pages 2145-2152
In the Gatorizing process, extrusion is needed to obtain a fine recrystallized structure. Because of the bottle-neck of the extrusion, however, a largesized disks have not yet been formed. Therefore, it is desirable to develop a new work processing excluding extrusion and applicable to form large disks. In the present study, it was discussed whether the application of superplastic warm-die and pack forging to Ni-base superalloy Mod. IN-100 atomized powder is appropriate or not. Namely, billets, which were a cylindrical case made of carbon steel or austenitic stainless steel and packed with the powder, were heated to 1 100°C and then superplastically forged at a strain rate of 1.8 × 10 -2 s -1 using dies made of Inconel 713C and pre-heated at about 600°C. A desirable forming was performed using a thick walled case made of austenitic stainless steel.
