Heating furnace and heat treatment method of workpiece

The invention provides a heating furnace, and relates to the field of heat treatment, the heating furnace comprises: a furnace tube having a hollow heating cavity; a cooling cavity is formed in the furnace shell, and the furnace shell is arranged outside the furnace tube in a sleeving manner, so that a containing cavity is formed between the furnace shell and the furnace tube; the heating assembly is located in the containing cavity and makes contact with the furnace tube; the air supply assembly communicates with the heating cavity, the containing cavity and the cooling cavity. The heating cavity, the containing cavity and the cooling cavity are isolated from one another. The invention further provides a heat treatment method of the workpiece, the heating furnace is adopted for conducting heat treatment on the workpiece, and parameters in the heat treatment process can be more conveniently controlled. 本发明提供一种加热炉，涉及热处理领域，该加热炉包括：炉管，具有中空的加热腔；炉壳，炉壳内设置有冷却腔，且炉壳套设于炉管的外部，以在炉壳与炉管之间形成容纳腔；加热组件，位于容纳腔内，并与炉管接触；供气组件，分别与加热腔