Die-casting molds are the main category among molds. With the rapid development of China's automobile and motorcycle industries, the die-casting industry has ushered in a new era of development. At the same time, higher requirements are also put forward for the mechanical function of die-casting mold life. With the progress of the times, it is still difficult to satisfy the functional requirements of new molds that rely solely on information. It is necessary to integrate various appearance and processing capabilities, and the appearance processing of die-casting molds can be achieved sideways to achieve die-casting molds with high precision and high life. high efficiency. For various types of molds, the premise of die-casting mold tasks is even more demanding.
Press forging is a process of repeated tasks in contact with hot metal, molten metal under high pressure, high-speed die-casting mold cavity filling, therefore requires high heat inertia, thermal conductivity and wear resistance of the die-casting mold, corrosion resistance, impact on toughness, red hardness, excellent Demoulding, etc. Therefore, the appearance treatment technology of die-casting molds is relatively high. In recent years, various die-casting molds have constantly appeared new technological appearance treatments, but they can generally be divided into three categories:
1) Improve skills in traditional heat treatment processes;
2) Appearance modification skills, including thermal diffusion treatment appearance, appearance phase change strengthening and spark strengthening skills;
3) Electroplating skills, including chemical plating, etc.
The traditional die-casting mold heat treatment process is quenching-tempering for future appearance treatment capabilities. Various information can be used as the difference between die casting molds, the same appearance processing skills and the difference between the technical results of the incident information. Markov compares mold substrate processing technology and traditional technology based on the differences in appearance mold data of substrate pre-treatment technology, history, and processing technology to improve mold performance and gradually mold life.
Another skill is the development of bias heat treatment with the use of traditional heat treatment technology and advanced treatment processes to improve the appearance and improve the life of die casting molds. The chemical heat treatment method of carbon and nitrogen infiltration treatment, and the practical quenching and tempering processes, etc. connect the NQN part (i.e., carbon and nitrogen infiltration - quenching - carbonitriding) composite strengthening, not only the appearance hardness, but also the useful hardened layer Depth, additional layer hardness gradient diffusion is reasonable, tempering invariance and corrosion resistance are improved, and then the mold is die-cast to obtain a superior core part with the appearance of a significant advancement in quality and functionality.
