To provide a method and an equipment for solid forming austempering treatment, capable of performing quenching at sufficient cooling velocity without causing distortion even in the case of a relatively thick material to be treated and also capable of securing desired austempering temp.
A material to be treated is heated to a temp. in the austenite region (not lower than the A point). Then, the material to be treated is quenched while holding this material to be treated between forming heat treatment dies having a temp. set at the temp. T1 lower than the desired austempering temp. T2. Subsequently, the forming heat treatment dies are heated to the austempering temp. T2 and the material to be treated is held at the austempering temp. T2, and bainitic transformation is allowed to occur.
KATO MARETO
HIROMURA TOSHIKI
KAMIYA NORIO
