1. On the premise of ensuring the hardness of the proof mold, try to use pre-cooling, graded cooling quenching or warm quenching process.

2. Changping heat treatment suggestion. For precision and complex molds, if conditions permit, the nitriding heat treatment plant recommends vacuum heating quenching and cryogenic treatment after quenching as much as possible.

3. For some sophisticated molds, pre-heat treatment, aging heat treatment, and tempering and nitriding heat treatment can be used to control the accuracy of the mold.

4. When the nitriding heat treatment plant repairs mold blisters, pores, wear and other defects, use cold welders and other repair equipment with low heat impact to avoid deformation during the repair process.

5. The mold structure design should be reasonable, the thickness should not be too large, and the shape should be symmetrical. Experts said that for the larger deformed mold, the deformation law should be mastered, and the machining allowance should be reserved. For large, precise and complex molds, a combined structure can be used.

6. Precise and complex molds should be soft-nitrided in advance to eliminate residual stress generated during machining.