1. Forging process
This is an important link in the manufacturing process of mold working parts. The forging temperature range should be strictly controlled, the correct heating specification should be formulated, the correct forging force method should be adopted, and the slow cooling or timely annealing after forging should be used.
2. Preliminary heat treatment
According to the different materials and requirements of the working parts of the mold, preliminary heat treatment processes such as annealing, normalizing or quenching and tempering are used to improve the structure, eliminate the structural defects of the forging blank, and improve the processing technology.
3. Quenching and tempering
This is the key link in mold heat treatment. Special attention should be paid to prevent oxidation and decarburization during the quenching and heating of the die, and the heat treatment process specifications should be strictly controlled. When conditions permit, vacuum heat treatment can be used. After quenching, it should be tempered in time, and different tempering processes should be adopted according to technical requirements.
4. Stress relief annealing
For molds with high precision requirements, they need to undergo stress relief and tempering treatment after grinding or electrical machining, which is conducive to stabilizing the precision of the mold and improving the service life.