pressure sintering furnace technology
Advantages of pressure sintering furnaces:
Advantages of pressure sintering furnaces. Pressure sintering furnace is a widely applied non-oxidation heat treatment technology with controllable atmosphere, and is also one of the main marks of the advanced technology of heat treatment production. Pressure sintering furnace can not only realize no oxidation and decarbonization of steel parts, but also realize no pollution and less distortion of workpieces. At present it has become an irreplaceable advanced technology in the production of industrial moulds.
Technology of pressure sintering furnace:
Treatment technology of pressure sintering furnace. Low distortion of workpiece is a very important advantage of pressure sintering furnace. According to domestic and foreign experience, the distortion of workpiece pressure sintering furnace is only one-third of that of salt bath heating and quenching. It is of great significance to popularize the vacuum heat treatment technology to study the vacuum heating mode of various materials and parts with different complexity degree and the distortion rule under various cooling conditions. The uniformity of air flow during vacuum heating, atmospheric pressure or high pressure air quenching has a great influence on the hardening effect and mass dispersion of parts. The study of air circulation in the furnace is of great significance for improving the structure of the furnace. Vacuum carburization is the most possible way to achieve high temperature carburization. However, long time heating at high temperature will make the austenite grain of most kinds of steel grow very long. It is necessary to study the influence law of concrete steel high-temperature carburizing, reheating and quenching on material and workpiece properties, and to optimize vacuum carburizing, cooling, heating and quenching process and equipment. In recent years, there has been a trend of international research and development of combustion vacuum furnaces using gas fuel. The difficulty of using gaseous fuel for heating in a vacuum furnace is too great. Although there is talk of energy saving, it is not necessarily an important development direction.
A modern pressure sintering furnace is a cold wall furnace in which the elements are heated in a vacuum and then hardened in oil or in atmospheric pressure and pressurized gas. The research and development of this type of equipment is a comprehensive, interdisciplinary work involving many scientific and technological fields. The application prospect of vacuum heat treatment of die material is very great. Most die steel is currently heated in a vacuum and then cooled and hardened in a gas. In order to obtain satisfactory mechanical properties both on the surface and inside of the workpiece, the vacuum high-pressure gas quenching technology must be adopted. At present, the international pressure of true air quenching has increased from 0.2mpa and 0.6mpa to 1 ~ 2MPa and even 3MPa. Therefore, the gradual increase of cooling gas pressure in pressure sintering furnace is an important development trend. In addition to high pressure gas quenching, the convection heating after vacuum extraction and filling of high pressure inert gas can be more than twice as fast as the traditional vacuum radiation heating speed, so obviously improving the heating efficiency is also one of the important directions of vacuum heating technology. The development of multi - function is also one of the trends of vacuum furnace. One of the typical examples is oil quenching in the front chamber, atmospheric or high-pressure gas quenching in the rear chamber, and vacuum heating or plasma carburizing in the middle chamber. At present the domestic market has this kind of furnace demand reflection. Various production lines of continuous vacuum carburizing, high pressure, air cooling, quenching and tempering which can meet mass production have come out one after another. It is anticipated that a major change in heat treatment of automobile parts will be brought about in the near future. According to the characteristics of vacuum heating easy to achieve high temperature carburizing, develop vacuum high temperature (1000 ℃ ~ 1050 ℃), carburizing, slow cooling, reheating and quenching in oil, cleaning and tempering production line should mention agenda as soon as possible.