First of all to the technical mold layout design should be reasonable, the thickness is not too disparate, the shape should be symmetrical, on the deformation of the larger mold to grasp the deformation rules, reserved processing margin, on the large, fine messy mold optional combination layout. For some fine messy mold can be used pre-heat treatment, aging heat treatment, quenching and tempering nitriding heat treatment to control the accuracy of the mold. In the repair mold sand eyes, stomata, wear and other shortcomings, the choice of cold welding machine and other small heat affected repair equipment to avoid the deformation occurred during the repair process.
Fine miscellaneous molds should be preheated to eliminate the residual stresses that occur during machining. On the fine messy mold, in the case of conditions agreed, try to use vacuum heating quenching and quenching after the cryogenic treatment. In the premise of the hardness of the tube, try to use pre-cooling, grading cooling quenching or quenching process.
Reasonable selection of materials. Fine molds should be selected for the micro-deformation of the mold material, carbide segregation of the mold steel should be a reasonable casting and tempering heat treatment, the larger and can not cast mold steel can be solid solution double fine heat treatment. Reasonable selection of heating temperature, control of heating speed, on the fine messy mold can be used to slow heating, preheating and other balanced heating method to reduce the mold heat treatment deformation.
