Ni 基超耐熱合金 Mod. IN-100 粉末焼結材の超塑性ウォームダイ・パック鍛造

概要

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The superplastic behaviour (total elongation and strain-rate sensitivity index m) of a powder-consolidated nickel-base superalloy Mod. IN-100 preformed by extrusion under various conditions has been measured at 1050℃. The results showed that a sample piece extruded with 72% at 1100℃ and annealed at 1070℃ for 1 h had the maximum in m at strain rate about 2.0×10^<-2>s^<-1>. Subsequently, the sample piece preformed under the condition as mentioned above, packed in 5 mm-thick carbon steel (S35C) and heated at 1100℃ was superplastically forged at strain rate about 1.8×10^<-2>s^<-1> using Inconel 713C dies previously heated at about 600℃. As a result, the sample piece was sound after forged. Furthermore, the results showed that the heat treatment for grain coarsening after superplastic forging should be performed at the temperature range of 1200-1275℃.
社団法人日本鉄鋼協会の論文
1987-05-01