Plastic Mold Tooling Heat Treatment Process

Goodtech is a famous plastic mold tooling company in China. So far, it has provided high-quality plastic mold tooling to customers all over the world. In the production process of the mold, the heat treatment of the steel is an important part.

Usually, our heat treatment will have the following process:

1. Forging process, which is an important link in the mold manufacturing process. For the mold of high alloy tool steel, technical requirements are usually put forward for the metallographic structure such as the carbide distribution of the material. In addition, the forging temperature range should be strictly controlled, the correct heating specification should be formulated, the correct forging force method should be adopted, and the forging should be cooled slowly or annealed in time.

2. Preparatory heat treatment. Preparatory heat treatment processes such as annealing, normalizing or quenching and tempering should be used depending on the material and requirements of the working parts of the mold to improve the structure, eliminate the organizational defects of the forging blank, and improve the processing technology. After proper preparatory heat treatment of high-carbon alloy die steel, the reticulated secondary cementite or chain carbide can be eliminated, the carbides can be spheroidized and refined, and the uniformity of carbide distribution can be promoted. This is conducive to ensuring the quality of quenching and tempering and improving the life of the mold.

3. Quenching and tempering. This is the key link in the heat treatment of the mold. If overheating occurs during quenching and heating, it will not only cause greater brittleness of the workpiece, but also easily cause deformation and cracking during cooling, which will seriously affect the life of the mold. When the die is quenched and heated, special attention should be paid to preventing oxidation and decarburization, and the heat treatment process specification should be strictly controlled. When conditions permit, vacuum heat treatment can be used. After quenching, it should be tempered in time, and different tempering processes should be adopted according to technical requirements.

4. Stress relief annealing. The working parts of the mold should be subjected to stress relief annealing treatment after rough machining. The purpose is to eliminate the internal stress caused by the rough machining, so as to avoid excessive deformation and cracks caused by quenching. For molds with high precision requirements, stress relief tempering is required after grinding or electrical machining, which is conducive to stabilizing mold accuracy and improving service life.

Goodtech is committed to becoming the world's top mold manufacturer, providing customers with high-quality, high-stability high-quality molds. If you are looking for high-quality mold manufacturers, welcome to contact Goodtech.