Vacuum hardening and cryogenic treatment of molds improve their service life

I. Comprehensive Optimization of Material Properties
Vacuum quenching, through heating and rapid cooling in an oxygen-free environment, reduces surface oxidation and decarburization of the workpiece, ensuring the surface hardness and toughness of the mold. Cryogenic treatment, through slow cooling at low temperatures, transforms residual austenite within the metal into martensite, improving material hardness and wear resistance. The combination of these two processes optimizes the overall mechanical properties of the mold material, ensuring stability under high loads and high frequency of use, and extending service life.
II. Improved Surface Quality and Dimensional Stability
Vacuum quenching prevents oxidation discoloration and quenching cracks during the quenching process, maintaining the surface smoothness and dimensional accuracy of the mold. Cryogenic treatment further eliminates internal stress, reducing the risk of microcracks and deformation, ensuring good dimensional stability of the mold under thermomechanical stress. This dual protection reduces mold maintenance frequency and production downtime, improving production line stability and economic efficiency.


III. Optimization of Internal Microstructure
Vacuum quenching and cryogenic treatment improve the internal microstructure of the mold. Vacuum quenching ensures fine and uniform metal grains, improving strength and toughness. Cryogenic treatment promotes complete austenite transformation, reduces residual stress, and prevents cracks or fractures in the mold due to internal stress concentration. Optimization of the internal microstructure achieves reasonable stress distribution and uniform energy release, thus extending the overall service life of the mold.
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Hengshui Dongmo Precision Metal Products Co., Ltd
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