The Progress of Bainitic Transformation During Austempering in Connection with the Alloying of Unconventional AHS Steels

Incomplete bainitic transformation during austempering treatment is mainly caused by the supersatu-ration of austenite with carbon. Such supersaturated becomes more stable and further stabi-lization led silicon alloying. Stable does not transform remains in structure as so-called residual austenite. Therefore, carbides, which are desirable a conventional struc-ture, cannot be formed carbide free bainite formed. The positive effect carbon on stabilization CFB structures has already been demonstrated described. However, another element that crucial incomplete chromium. influence chromium development microstructure unconventional AHS steels austemper-ing discussed experiment this paper.