(1) Reasonable material selection. For precision and complex molds, micro deformation mold steel (such as air quenched steel) with good materials should be selected. For mold steel with severe carbide segregation, reasonable forging and quenching and tempering heat treatment should be carried out. For larger and non forging mold steel, solid solution double refining heat treatment can be carried out.
(2) The design of the mold structure should be reasonable, with no significant difference in thickness, and the shape should be symmetrical. For molds with large deformation, the deformation law should be mastered, and machining allowance should be reserved. For large, precise and complex molds, composite structures can be used.
(3) Precision and complex molds require pre heat treatment to eliminate residual stresses generated during mechanical processing.
(4) Reasonable selection of heating temperature, control of heating speed, and slow heating, preheating, and other balanced heating methods can be adopted for precision and complex molds to reduce mold heat treatment deformation.
(5) On the premise of ensuring the hardness of the mold, try to use pre cooling, graded cooling and quenching, or warm quenching processes.
(6) For precision and complex molds, if conditions permit, vacuum heating quenching and deep cooling treatment after quenching should be used as much as possible.
