In austenitic steels, nitrogen is an important alloying element in terms of phase balance, austenite stabilizing effect and solid solution hardening. In case a large amount of nitrogen is added to high chromium steels, austenitic stainless steels can be produced in Fe-Cr-N ternary alloys without nickel. For instance, Fe-23%Cr-0.9%N is just the composition which provides stable austenitic structure at room temperature. This alloy shows excellent mechanical properties; high yield stress, large work-hardening rate and good ductility. However, such excellent properties are guaranteed only on the condition that the alloy was quenched from an elevated temperature to avoid an eutectoid reaction; decomposition of austenite to Cr2N and ferrite, because eutectoid structure gives a harmful effect to the ductility of austenitic steels. In this paper, an alloy design for suppressing the eutectoid reaction was suggested and the effect of manganese addition to Fe-Cr-N ternary alloy was presented as an example.
|ジャーナル||Materials Science Forum|
|出版ステータス||出版済み - 1999|
|イベント||Proceedings of the 1998 5th International Conference on High Nitrogen Steels (HNS) - Stockholm, Swed|
継続期間: 5月 27 1998 → 5月 28 1998
!!!All Science Journal Classification (ASJC) codes