Ni 基超耐熱合金粉末の超塑性ウォームダイ・パック鍛造

概要

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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 1100℃ 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℃. A desirable forming was performed using a thick walled case made of austenitic stainless steel.
社団法人日本鉄鋼協会の論文
1988-11-01