Mold manufacturing generally involves several processes such as forging, cutting, and heat treatment. In order to ensure the quality of the mold and reduce the production cost, the material should have good forgeability, machinability, hardenability, hardenability and grindability; it should also have small oxidation, decarburization sensitivity and quenching. Deformation cracking tendency.
1. Forgeability has low hot forging deformation resistance, good plasticity, wide forging temperature range, low tendency for forging cracking and precipitation of reticulated carbides.
2. Annealing process spheroidizing annealing has a wide temperature range, low annealing hardness, small fluctuation range and high spheroidization rate.
3. The cutting process has a large amount of cutting, low tool loss and low surface roughness.
4. Oxidation and decarburization sensitivity When heating at high temperature, the anti-oxidation energy is good, the decarburization speed is slow, and it is not sensitive to the heating medium, and the tendency to produce pitting is small.
5. Uniform and high surface hardness after hardening quenching.
6. After hardenability quenching, a deep hardened layer can be obtained, and the quenching medium can be hardened.
7. Quenching deformation cracking tendency The conventional quenching volume change is small, the shape is warped, the distortion is slight, and the abnormal deformation tendency is low. Conventional quenching cracking has low sensitivity and is not sensitive to quenching temperature and workpiece shape.
8. The grindable grinding wheel has relatively low relative loss, no grinding limit, large grinding amount, no sensitivity to the grinding wheel quality and cooling conditions, and it is not easy to wear and grind.