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Mold occurs during the heat treatment deformation of the prevention
Thermal quenching and cryogenic treatment after quenching.

3, for some sophisticated molds can pre-heat treatment, aging heat treatment, quenching and nitriding heat treatment to control accuracy of the mold.

4 nitride heat treatment plant at the time of repair mold blisters, porosity, wear and other defects, such as a small selection of cold welding heat affected repair equipment to prevent deformation of the patching process.

5, mold design should be reasonable, not too poor thickness, shape should be symmetrical, experts said, to master mold for large deformation deformation law aside allowance for large, sophisticated molds can be combined structure.

6, sophisticated molds to be pre-soft nitriding, to eliminate residual stress generated during machining.
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