How to heat the Q345b square tube?

For the heat treatment of Q345b square steel pipes, there are three methods for the transfer of heat: radioactive material transfer, conveyance, and forced convection heat transfer.

Radioactive Material

Heat transfer via conduction and convection requires physical contact between small blocks to transfer electrical energy, whereas radioactive substances enable the transfer of electrical energy from one small block to another without physical contact between them.

(II) Transmission

Heat transfer through conveyors typically occurs from a higher-temperature to a lower-temperature section of the same small block, or from a higher-temperature block to a lower-temperature block in close contact with it. The Q345b square tube conveyor has the following characteristics:

Firstly, there is no external effect heat motion or misalignment in the heat conduction of particles without external effects. Therefore, heat conduction is crucial in solids such as metal composites and fire-resistant thermal insulation materials.

Secondly, particles must rub and touch in the center to facilitate transmission and heat conduction. Therefore, when a solid has a high porosity, the transmission and heat conduction are weakened, and the common thermal insulation materials for heat treatment equipment are made based on this fundamental concept.

(3) Heat Transfer by Conduction

The heat exchange process in a forced convection heat exchanger is due to the external effect of fluid dynamics during the exercise, where the transfer of electrical energy from high to low temperature takes place throughout the contact process. Therefore, the media suitable for this heat conduction method are only liquids (including the molten Q345b square steel tube metal composite material) and acetylene gas. Forced convection heat exchangers can cause heat exchange between the fluid dynamics and the solid surface, as well as within the fluid dynamics itself.