18-8Tiステンレス鋼の高温強度 : 高温強度特集号

概要

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A comprehensive study was carried out to investigate the effects of the chemical compositions, heat treatments and grain size on the creep rupture properties of the 18-8 Ti stainless steels, in wide use for superheater tubes and reheat tubes of power boilers. The conclusions are as follows:(1) Effect of chemical compositions It was found that the ferrite-free austenitic steels had the creep rupture strength superior to that with 14% ferrite at 550℃ and 650℃, both of which had different compositions even though within the range of the specification (AISI 321 or JIS STB 42 D) and were obtainable to single or duplex structure by selection of proper composition also within the range of the specification. That is speculated to be attributable to occurrence of the precipitation of enormous chromium carbide around the ferrite in duplex austenite-ferrite structure at testing temperature.
社団法人日本材料学会の論文
1962-03-15