What matters should be paid attention to in the experiment of vacuum furnace
Vacuum furnace is generally composed of furnace, electrothermal device, vacuum system, sealed shell, power supply system and temperature control system. Sealing furnace shell is welded with carbon steel or stainless steel, and the joint surface of removable parts is sealed with vacuum sealing material. In order to prevent the shell from deforming and sealing material from deteriorating after heating, the shell is usually cooled by water or gas.
The matters needing attention in the experiment of vacuum furnace, such as the structure of vacuum furnace, temperature control, heating technology and atmosphere in the furnace, will directly affect the quality of the product after the production of vacuum furnace. In forging furnace, increasing the temperature of metal can reduce the melting resistance, but too high temperature can cause grain oxidation or over-burning, which greatly affects the quality of products in vacuum furnace. In the process of heat treatment, if the steel is heated to a point above the critical temperature and then suddenly cooled, the hardness and strength of the steel can be improved; if the steel is heated to a point below the critical temperature and then cooled slowly, the steel will be more tough.
Vacuum oven, as its name implies, is high vacuum, because its structure is circular, it can extract high vacuum. Why do we need an atmosphere furnace when we have a vacuum furnace? This is in terms of price. Assuming that the vacuum of customer's demand is not high, the atmosphere furnace can meet his requirements, you say how he chooses. In addition, the atmosphere furnace generally intake and exhaust at the same time, through the maintenance of gas, can also prevent the atmosphere into the furnace, can fully meet the requirements of product processing.
Vacuum sintering in vacuum furnace means that powder, powder compact or other materials are heated at appropriate temperature in vacuum environment, and the bonding between particles is realized by means of atomic migration. The purpose of sintering is to make the porous powder compacts possess certain structure and properties of alloys. Selection of heat shield: The heat shield is the main part of the heating chamber of vacuum sintering furnace. Its main function is heat insulation, heat preservation and reducing heat loss. It is also the structural basis of fixed heater. Therefore, the structure and material selection of the heat shield have a great influence on the power and performance of the vacuum furnace (such as vacuum degree, exhaust rate, etc.).