Die casting die factory: New technology of die casting die-Shuangcheng Hardware |Die Cast Product|Die Casting Mould

Die casting die factory: New technology of die casting die

Date：

2022-11-29

Die casting mold factory said that die casting mold is a big category of mold. With the rapid development of China's automobile and motorcycle industry, the die casting industry has ushered in a new development period, which puts forward higher requirements for the comprehensive mechanical properties and life of die casting molds. Luo Bohui, secretary-general of the International Die and Mould Association, believes that it is still difficult to meet the ever-improving performance requirements only by relying on the application of new die materials. In order to meet the requirements of high efficiency, high precision and high life, various surface treatment technologies must be applied to die casting die surface treatment.

Die casting die factory: New technology of die casting die

Among all kinds of dies, the working conditions of die casting die are more demanding. Pressure casting is to make molten metal in high pressure, high speed under the full model cavity and die casting molding, in the process of work with hot metal repeated contact, so the die casting mold is required to have high thermal fatigue, thermal conductivity, wear resistance, corrosion resistance, impact toughness, red hardness, good release property. Therefore, the surface treatment technology of die casting die has high requirements.

Improvement technology of traditional heat treatment process: Die casting die factory says that the traditional heat treatment process of die casting die is quenching-tempering, and then develops the surface treatment technology. Due to the variety of materials that can be used as die casting molds, the same surface treatment technology and process applied to different materials will produce different results. The matrix pretreatment technology and die surface treatment technology were put forward by Shikefu. On the basis of the traditional technology, the suitable processing technology for different die materials is put forward, so as to improve the performance of the die and prolong the life of the die. Another development direction of heat treatment technology improvement is to combine traditional heat treatment technology with advanced surface treatment technology to improve the service life of die casting die. For example, the chemical heat treatment method of carbornitride, combined with the conventional quenching and tempering process of NQN (namely, carbornitride, quenching and carbornitride composite strengthening), not only obtains higher surface hardness, but also increases the effective depth of the hardened layer. Reasonable distribution of carbornitride layer hardness gradient, tempering stability and corrosion resistance, so that the die casting mold in good core performance at the same time, The surface quality and performance are greatly improved.

Nitriding and related low temperature thermal diffusion technologies: Die casting die manufacturers say this type includes nitriding, ion nitriding, carbon nitriding, oxygen nitriding, sulfur nitriding and sulfur carbon nitriding, oxygen nitriding and sulfur ternary infiltration methods. These methods have simple processing technology, strong adaptability, low infiltration temperature, generally 480 ~ 600℃, small deformation of the workpiece, especially suitable for the surface strengthening of precision molds, high hardness of nitriding layer, good wear resistance, good adhesion resistance.