According to the differences of the cooling medium and vacuum quenching can be divided into vacuum oil quenching, vacuum gas quenching, vacuum quenching and vacuum nitrate isothermal quenching. Vacuum oil quenching, vacuum gas quenching and vacuum tempering are mainly used in the vacuum heat treatment of die. In order to maintain the excellent characteristics of the vacuum heating of the work piece (such as mold), the ion and development of coolant and cooling process are very important.
Vacuum heat treatment technology is developed in recent years is a new kind of heat treatment technology. It has the characteristics, it is mold manufacturing urgently needed, such as to prevent heating oxidation and decarburization, vacuum degassing or degassing, the elimination of hydrogen embrittlement, so as to improve the plastic, toughness and fatigue strength of materials (parts). The vacuum heating is slow, the internal and external temperature difference is small, and so on, the vacuum heat treatment process caused by the small deformation and so on.
For heat treatment after no longer machining of the mold surface, after quenching as far as possible by vacuum tempering, especially vacuum quenching workpiece (die), it can improve and surface quality of mechanical properties, such as fatigue performance, surface brightness, and corrosion.
The successful development and application of the computer simulation technology (including the organization simulation and performance prediction technology), which makes the intelligent heat treatment of the mold become possible. Due to the small batch (or even single piece) of the mold production, the characteristics of many varieties, as well as the heat treatment performance requirements are high and does not allow the characteristics of waste products, and make the mold of intelligent heat treatment to become a must. Mould intelligent heat treatment include: clear die structure, material and heat treatment performance requirements mold heating process the temperature field and stress field distribution of the computer simulation of the temperature field in the mold cooling process, phase change process and stress field distribution of the computer simulation process heating and cooling over the simulation of quenching process formulation of heat treatment equipment, automation control technology.
Foreign developed countries, such as the United States, Japan, etc., in the vacuum high-pressure gas quenching, has been carried out in this area of technology research and development, mainly aimed at the mold.
Bottle blowing machineProfessional manufacturerASNTO|SNTO|Xintai bottle blowing machineHuangyan Zhejiang Plastic Machinery Factory
