How does hot press forming work?

Hot Stamping is a sheet metal forming process that is performed at high temperatures and is commonly used to manufacture high strength and high toughness automotive parts such as door beams, chassis, etc.

The following is the basic operation of hot stamping.

Plate preparation: Firstly, the steel plate to be processed is pretreated, including cutting, deburring, surface cleaning, etc., to ensure that the surface of the plate is smooth and clean, and that the chemical composition and physical properties of the plate meet the requirements.

Heating: The plate is placed in a heating furnace to reach the required processing temperature, usually above 800°C. During the heating process, the surface of the plate is heated to the required temperature. During the heating process, an oxide layer is formed on the surface of the sheet, which protects it from oxidation and corrosion.

Cooling: After heating, the sheet is quickly removed from the furnace and placed in a special cooling mold, where it is cooled through the cooling mold, allowing the sheet to cool quickly in a short period of time, thus achieving phase hardening.

Stamping: The sheet is placed in the stamping die and processed into the required shape by mechanical stamping. Higher strength and toughness can be obtained because the plate is phase hardened during the heating and cooling process.

empering: After the stamping process is completed, the plate needs to be tempered to eliminate residual stresses from the process and to improve the toughness and plasticity of the plate.