ガスタービン用耐熱鋼の研究 (V)

概要

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In the heat resisting steel, the W and Mo were often used for the purpose of elevation of the creep strength in high temperature. The authors studied the effect of W, Mo and (W+Mo) contents on the aging of Ni-Cr-Co austenitic heat-resisting steel containing 15% Ni, 20% Cr and 15% Co. The authors first examined the change of their hardness due to various heat treatments of each sample : i, e. tbe solid-solution treatment and aging, and then observed the microstructure. As results of these experiments, the most moderate composition and heat treatment for Ni-Cr-Co austenitic heat-resisting steel were found. The optimum conditions were as follows : (1) The most suitable composition, W 3.0∿5.0%, Mo 3.0∿5.0%, W+Mo (3+5∿(5+3)% ; (2) the treatment at 1200∿1250℃, for the solution treatment, and 700∿750℃, for the aging temperature, and the aging time for 6∿12 hours.
社団法人日本鉄鋼協会の論文
1954-10-25