What is the role of heat treatment process in filter die-casting mold custom processing?
Publish Time: 2024-12-04
In the process of filter die-casting mold custom processing, heat treatment process plays an extremely critical role and has a profound impact on the performance and life of the mold.
First of all, heat treatment can significantly improve the hardness of the mold. Through heat treatment methods such as quenching, the organizational structure of the mold material changes, and the carbon atoms are redistributed in the lattice to form a high-hardness martensite structure. This makes the mold less likely to deform and wear when it is subjected to the scouring and high pressure of high-temperature liquid metal during the die-casting process, ensuring the accuracy and dimensional stability of the filter die-casting molding. For example, for the commonly used H13 hot working die steel, after proper quenching and tempering treatment, the hardness can be greatly improved, which can effectively resist the mechanical stress during the die-casting process.
Secondly, heat treatment helps to improve the toughness of the mold. The tempering process is carried out after the hardness is increased, which can eliminate the internal stress generated by quenching and adjust the toughness of the material. Appropriate toughness can prevent the mold from cracking or even breaking due to sudden impact or stress concentration during use. Under the impact of frequent opening and closing operations of filter die casting and rapid filling of liquid metal, good toughness can keep the mold structurally intact and reduce maintenance and replacement costs.
Furthermore, heat treatment can optimize the heat fatigue resistance of the mold. In the die casting cycle, the mold undergoes continuous heating and cooling processes, and this heat cycle easily causes heat fatigue cracks on the mold surface. Through appropriate heat treatment processes, such as multiple tempering, controlling heating and cooling rates, etc., the grains can be refined, the organization can be uniform, the heat fatigue resistance of the mold material can be improved, and the service life of the mold can be extended. For example, some advanced vacuum heat treatment technologies can more accurately control various parameters in the heat treatment process, effectively improve the heat fatigue resistance of the mold, and ensure that the filter die casting mold can operate stably under long-term and high-intensity working conditions.
In addition, heat treatment can also affect the wear resistance of the mold. By forming a hard and wear-resistant surface layer or changing the chemical composition of the material surface, the mold can reduce surface wear during contact with die casting materials and release agents, maintain good demolding performance and cavity surface quality, and ensure that the appearance and dimensional accuracy of the filter die casting products meet the requirements.
In summary, heat treatment process is indispensable in filter die-casting mold custom processing. It improves the comprehensive performance of the mold from many aspects and lays a solid foundation for the efficient and high-quality die-casting production of filters.
