Vacuum Furnace Classification

Vacuum furnace is mainly used for sintering metal powder products, metal injection forming products, cemented carbide, ceramics, Nd-Fe-B, stainless steel non-woven fabrics, etc.

The structure of the high temperature vacuum sintering furnace is basically the same as that of the vacuum heat treatment furnace, except that appropriate changes are made according to the sintering process. Vacuum sintering furnaces are divided into double vacuum sintering furnaces and single outdoor pressurized gas-cooled vacuum sintering furnaces, which have two identical sintering furnaces, a common set of vacuum pumping system and electrical control system. In operation, the two furnaces are used for heating and cooling respectively and alternately.

The furnace has the functions of degreasing, pre-sintering and sintering in the same furnace at one time. The degreasing system includes external pipelines, vacuum valves, condensers, collectors and mechanical pumps. In order to meet the requirements of Nd-Fe-B sintering process, a vacuum unit with high vacuum and large pumping speed should be equipped in a single outdoor circulating pressurized gas-cooled sintering furnace. The structure of the furnace is the same as that of a single-chamber outdoor circulating pressurized gas quenching vacuum furnace.

Silicon-Nitride-Hot-Press-Sintering-Furnace

Hot-Pressure-Tungsten-Carbide-Sintering-Furnace

Cemented-Carbide-Vacuum-Induction-Furnace

Powder-Metallurgy-Carbonization-Vacuum-Induction-Furnace

About the maintenance of vacuum tempering furnace?

With the prolongation of furnace operation time, the thermal resistance of heat shield decreases, and the electric heating element volatilizes and the resistance increases, so the power should be increased appropriately. In the practice of consumption, the experience calculation method is usually used to confirm the power, which is the relationship between the volume of graphite felt or refractory fiber felt heat shield vacuum furnace and heating power. According to the figure, 1300 can be confirmed. C vacuum furnace heating power. If it is a vacuum furnace with a metal heat shield, the heating power needed to be increased by about 30%.

Maintenance and maintenance of insulating screen of vacuum tempering furnace manufacturer plays an insulating and insulating role in vacuum furnace, and sometimes serves as the structural foundation of fixed heater. There are four types of heat shield: all-metal heat shield, sandwich heat shield, graphite felt heat shield and mixed felt heat shield. The main points of different heat shields should be controlled during maintenance.

Molybdenum and tungsten materials are usually used in the 1-2 layers near the electrothermal elements, while stainless steel materials can be used in the outer layers, and the thickness should be as thin as possible (medium-sized and small-sized furnaces are usually o.2). 0.5 mm. The large-scale furnace is o.5-1.Omm, and the heat shield should be processed into a bright state before assembling to reduce blackness and enhance reflection effect. 1300. The number of heat shield layers of C furnace is usually 5-6 layers, and the interval between layers is 5-10 mm. The contact area of several radiation plates should not be too large to reduce thermal short circuit. The heat shield should be expanded and contracted, and made into a detachable type, so as to facilitate the next maintenance.

Multi-atmosphere-vacuum-sintering-furnace-for-cemented-carbide

Vacuum-Sintering-Furnace-in-MIM-Industry

Vacuum-Heat-Treatment-Furnace-of-Metal-Parts