What aspects should be paid attention to in heat treatment of die steel?

1, first of all, be careful not to crack by quenching. This is necessary. No cracking, even if it can't reach the target, there is still the possibility of repair. If it cracks, everything is over.

2. Don't overheat because the heating temperature is too high, which, like cracking, can't be saved, so put an end to overheating.

3. Avoid oxidative decarbonization. Oxidative decarbonization will make the hardness of the die fail to meet the requirements and increase the tendency of cracking. Therefore, it is best to heat the mold in a furnace with protective atmosphere, such as a salt bath furnace, a vacuum furnace and a controlled atmosphere furnace, unless the machining allowance you leave is large enough.

3. Minimize deformation, which will lead to out-of-tolerance of dimensions, increase straightening process and machining allowance, and increase heat treatment cost. Under appropriate conditions, the deformation can be effectively reduced by reducing the heating speed, preheating or precooling, reducing the heating temperature as much as possible, using mild medium, and adopting staged quenching or isothermal quenching.

4. Temper in time after quenching.