Significant advantages: The trolley has a large load-bearing capacity, suitable for loading and unloading heavy, ultra long, and oversized workpieces, without the need for lifting into the furnace; Convenient loading and unloading of materials after the trolley is removed, reducing the risk of collision during workpiece transportation; The furnace body is well sealed, the temperature field is uniform, and the hardness and metallographic structure of the heat-treated workpiece are consistent. The equipment has a high degree of automation and can preset heating and insulation curves.