Mold is very important for manufacturers. If the deformation of precision mold occurs during heat treatment, we need to do a good job of prevention when dealing with money. What should we do? Xiaobian has sorted out the following methods for this purpose.

(1) Fair material selection. For precision and complex dies, micro deformation die steel with good material (such as air cooling steel) shall be selected. Die steel with severe carbide segregation shall be reasonably cast and treated. For large and non cast die steel, solid solution double refinement heat treatment can be carried out.

(2) The mold structure design should be fair, the thickness should not be too different, and the shape should be symmetrical. For molds with large deformation, the deformation law should be grasped, and the machining allowance should be reserved. For large, precision and complex molds, the combined structure can be adopted.

Precision die

(3) Precision and complex dies should be pre heat treated to eliminate the residual stress produced in the machining process.

(4) Reasonably select the heating temperature and control the heating speed. For precision and complex molds, slow heating, preheating and other balanced heating methods can be adopted to reduce the heat treatment deformation of molds.

(5) Under the condition of ensuring the hardness of the die, precooling, staged cooling quenching or warm quenching process shall be adopted as far as possible.

(6) For precision and complex molds, vacuum heating quenching and cryogenic treatment after quenching shall be adopted as far as possible under the premise of permission.

(7) For some precision and complex molds, pre heat treatment, aging heat treatment and quenching, tempering and nitriding heat treatment can be used to control the accuracy of molds.

(8) When repairing mold defects such as sand holes, pores and wear, repair equipment with small thermal impact such as cold welding machine shall be selected to avoid deformation in the repair process.

The above is about the methods to prevent the deformation of precision die heat treatment. I hope it can help you!

There are many methods for heat treatment process operation, including hole plugging, hole binding, mechanical fixation, appropriate heating methods, accurate selection of mold cooling direction and movement direction in cooling medium, etc. a reasonable tempering heat treatment process is also an effective measure to reduce the deformation of precision and complex molds.