To provide an isothermally holding chamber for isothermally holding a metallic article therein during heat treatment by using an inert gas instead of a salt bath, and to provide a continuous heat treatment system for metal, which continuously heat-treating the metallic article at high efficiency, by arranging a heating chamber or a gas cooling chamber connected to the isothermally holding chamber in the front or back thereof.
The continuous heat treatment system for metal comprises: an isothermally holding chamber for isothermally holding a charged heated workpiece in an isothermal gas atmosphere controlled to the transformation temperature of the metal; the heating chamber for heating the workpiece to a quenching temperature arranged in the front of the isothermally holding chamber: and the gas cooling chamber for rapidly cooling the workpiece after having been isothermally held to the atmospheric temperature or lower arranged in the back of the isothermally holding chamber.
Iwa Saki Kokuni
Akira Kurihara
Kawamata Sumio
Koji Okazaki
Masakazu Ito
Shunichi Takahashi
Toshio Takamatsu