The quenching stress at room temperature and the quenching stress at zero are superimposed, and cold treatment cracks are formed when the stack response force exceeds the strength limit of the material. Preventive measures: (1) After quenching, place the mold in boiling water for 30-60min before cold treatment, which can eliminate 15-25 quenching internal stress and stabilize the retained austenite, and then perform conventional cold treatment at -60℃, or perform -120 Cryogenic treatment at ℃, the lower the temperature, the greater the amount of retained austenite transformed into martensite, but it is impossible to complete the transformation. Experiments show that about 2-5 retained austenite remains, and a small amount of retained austenite remains as needed The body can relax the stress and act as a buffer. Because the retained austenite is soft and tough, it can partially absorb the martensitizing rapid expansion energy and ease the transformation stress;

(2) After the cold treatment is completed, the mold is taken out and put in hot water to heat up. It can eliminate 40-60 cold treatment stress. After heating to room temperature, it should be tempered in time. The cold treatment stress is further eliminated to avoid the formation of cold treatment cracks, obtain stable structure performance, and ensure that no distortion occurs during storage and use of mold products.

The selection of Disposable Medical Device Mould Company milling cutters needs to be based on the material of the workpiece, the working conditions, the stability of the cutting process, and the cost. Several aspects such as productivity, processing accuracy, etc. are comprehensively considered. Only a reasonable choice of tools can improve processing quality and processing efficiency, meet product aesthetics and functional requirements, and improve mold processing technology.