What are the advantages of vacuum heat treatment technology
Vacuum heat treatment is a metal heat treatment process in which metal workpieces are heated under 1 atmosphere (i.e., negative pressure). The anaerobic heat treatment of vacuum heat treatment can avoid the workpiece oxidation and decarbonization, greatly improve its hardness, reduce brittleness, and degrease degassing. These characteristics of vacuum heat treatment can greatly improve the cleanliness of workpiece surface. The mold becomes relatively brighter, reducing the amount of deformation of the workpiece and the hardness of the workpiece after vacuum heat treatment by 3-5 times of the normal heat treatment. For some value of high precision workpiece, such as large precision mould is particularly important, vacuum heat treatment greatly increase its service life, the end result was enterprise year use 10 precision mould, now only need to use 2-3 precision mold. Enterprises have greatly saved production costs and increased economic benefits.
Vacuum heat treatment can be used in annealing, degassing, solid solution heat treatment, quenching, tempering and precipitation hardening. It can also be used for chemical heat treatment after passing through the appropriate medium.
The successful development and application of computer simulation technology of heat treatment process (including organization simulation and performance prediction technology) makes the intelligent heat treatment of mold possible. Due to the mold production of small batch (even piece), the characteristics of many varieties, as well as to the performance requirements of high heat treatment and are not allowed to appear the characteristics of the waste, and makes mould intelligent heat treatment must be.
The intelligent heat treatment of the mould includes: to clarify the structure, material and heat treatment performance requirements of the mould; Computer simulation of temperature field and stress field distribution in mould heating process; Computer simulation of temperature field, phase change process and stress field distribution in die cooling process; Simulation of heating and cooling process; Formulation of quenching process; Automatic control technology of heat treatment equipment. Foreign developed industrial countries, such as the United States and Japan, have carried out technical research and development in vacuum high-pressure gas quenching, mainly aiming at moulds.