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The reason why the vacuum furnace can not pump clean air

Release time:

2024-10-19

Water cooling device, vacuum heat treatment protection furnace shell, furnace cover, electric heating element guiding treatment (cold electrode, intermediate vacuum heat and other components are all working in vacuum and heating state. Working under such extremely unfavorable conditions, it is necessary to ensure that the structure of the conference parts will not be deformed or damaged, and the vacuum seal will not be overheated or burned. Therefore, each component should not have a water cooling device according to different conditions to ensure that the vacuum heat treatment furnace can work normally and have sufficient service life.

Using voltage and large current: in the vacuum container, when the vacuum space is in the range of several supports-X0-1 supports, the clean conductor in the vacuum container will produce a range light discharge phenomenon under higher electric music. In the direct air execution of external purchase, serious out-of-line discharge, near-electric heating example, willing to heat layer, etc., thus causing major accidents and losses, thus causing major accidents and losses. The working electric music of the example of electric heating of the external furnace is generally not more than 80-100 generations. At the same time, in the design of electric heating element junction, effective measures should be taken. For example, try to avoid parts, the distance between the electrodes should not be too small to prevent the occurrence of glow discharge or arc discharge.

Most heating and heat insulation materials can only be used in a vacuum state: the heating and heat treatment materials of the vacuum heat treatment furnace work under vacuum and high temperature, so high temperature, low steam pressure, good radiation effect and low thermal conductivity are proposed for these materials. The requirements for coefficient are not high for oxidation resistance. Therefore, vacuum heat treatment furnaces are widely used, as well as graphite and the like as heating and heat insulating materials. This material is easily oxidized in the atmosphere, so regular heat treatment care can not be used.

Use these heating and insulating materials.

Vacuum furnace strict vacuum sealing: As we all know, the vacuum heat treatment of metal parts is carried out in a closed vacuum furnace. Therefore, it is of great significance to obtain and maintain the original leakage rate of the furnace and ensure the working vacuum degree of the vacuum furnace to ensure the quality of the vacuum heat treatment of the parts. Therefore, a key problem of the vacuum heat treatment furnace is to have a reliable vacuum sealing structure. In order to ensure the vacuum performance of the vacuum furnace, the structural design of the vacuum heat treatment furnace must follow its principles, that is, the furnace body should be air-tight connection, the furnace body should be opened or not opened as little as possible, and the dynamic sealing structure should be used less or avoided. To reduce vacuum water leakage.

High degree of automation of vacuum furnace: The high degree of automation of vacuum heat treatment is due to the selection of heating and cooling of metal workpieces, and more than a dozen or even dozens of important actions are completed. These actions are performed in a straight air inside and are inaccessible to the operator. At the same time, some actions of the metal workpiece, such as heating and heat preservation, must complete six actions within 15 seconds. In such a fast condition to complete many actions, it is easy to cause the operator's tension and misoperation. Therefore, only a high degree of visual in order to accurately and timely in accordance with the procedures for action coordination.

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