The purpose of die steel quenching die steel quenching is to heat the die steel to a human set temperature or Ac above and keep a certain time, and then quickly cool down, this process is called quenching.

In die steel, the main purpose of quenching is to transform the die into martensite after austenitizing as many alloying elements dissolved in austenite as possible, and to obtain carbide dispersion and carbide precipitation after tempering at the appropriate temperature. The tempered martensitic organization achieves the desired complex mechanical properties and wear resistance. In the heat treatment process, quenching is a very important task, the success of which depends mainly on the rate of heating up, quenching temperature, holding time and subsequent cooling.

As for the heating up speed, when heating up too slowly, the workpiece is easy to oxidation decarburization, low service life and high cost. However, if the temperature is too high, there will be a temperature difference between the surface and the center of the mold. The greater the temperature difference, the greater the thermal stress, and therefore the greater the possibility of warping and cracking.