Continuous type atmosphere heat treating furnace.

摘要

A continuous heat treating furnace (K1, K2) for heat treating a ferrous metal work (W) in a protective atmosphere, including a furnace (1) separated into a charge chamber (3) and a heat treating chamber (15) by a partition door (2) and provided with a transport device (22) for transporting the work (W). A first heating device (4), a recirculating fan (5) and a gas purge device (6) are provided in the charge chamber (3), while a second heating device (16) is provided in the heat treating chamber (15) supplied with the protective atmosphere, whereby the work (W) is preheated through convectional heat transfer in the charge chamber (3) simultaneously with high- temperature purging of the charge chamber (3) and then, is heat treated under the protective atmosphere in the heat treating chamber (15).