Influence of Nb Addition on Microstructure and Creep Property of Heat-Resistant Cast Steel in Vacuum Carburizing and Quenching
نویسندگان
چکیده
The relation between microstructure and creep property of austenitic heat-resistant cast steels with without Nb addition under the condition repeated vacuum carburizing quenching was investigated. Cr-carbide scale is formed on sample surface by a reaction, resulting in depletion Cr matrix adjacent to scale. A carburized layer consisting various fine carbides observed below Cr-depleted layer, depth suppressed addition. When process repeated, formation voids caused heating rapid cooling more remarkable primary than carbides. As increases, rupture time both shifts shorter side; however, effective for extending at 1303 K.
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ژورنال
عنوان ژورنال: Materials transactions
سال: 2022
ISSN: ['1345-9678', '1347-5320']
DOI: https://doi.org/10.2320/matertrans.f-m2022810