Cholinga cha induction furnace heating

Induction furnaces use the principle of electromagnetic induction heating to heat metal workpieces, and are generally widely used in metal forging, casting, hot stamping, hot rolling and metal quenching and tempering heating.

When the induction furnace heats the workpiece, the input of the external heat source will cause the change of the internal energy state of the blank. As the temperature increases, the kinetic energy of the atoms increases, and the possibility of leaving its equilibrium position also increases. Compared with normal temperature, dislocation is easy Movement, slippage is easy, and deformation resistance is reduced; in addition, the mobility of high-temperature atoms increases, the diffusion speed is accelerated, recovery and recrystallization are easy, and the metal shaping is improved; in addition, the mobility of atoms increases at high temperature, and the diffusion speed is accelerated. , it is easy to recover and recrystallize, and the plasticity of the metal is improved; when the material with allotropic transformation is heated, there are processes such as phase transformation, recrystallization and phase dissolution in a certain temperature range. In fact, induction furnace heating is to solve the two problems of shaping and deformation resistance of metal workpieces;

The purpose of induction furnace heating is to correctly utilize the microscopic evolution law during the heating process of the metal workpiece, improve the plasticity of the metal, and at the same time obtain a good post-forging structure and performance. Induction furnace heating is an important link in the entire metal forging, casting, hot stamping, hot rolling and metal quenching and tempering heating process, which has a direct impact on improving productivity, ensuring heating quality and saving energy consumption.

For example, the deformation resistance of stainless steel 12Cr18Ni9 at room temperature is 640MPa, the deformation resistance of stainless steel 12Cr18Ni9 is reduced to about 120MPa when heated to 800℃ in an induction furnace, and the deformation resistance is reduced to about 20MPa when heated to 1200℃, which is 97% lower than that at room temperature. .