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Characteristics of common heating elements in vacuum furnace
#1
Characteristics of common heating elements in vacuum furnace

When selecting the heating element, we should also deal with the chemical properties of the product according to our own needs, so as to avoid the material of the heating element affecting the quality of the workpiece. Therefore, heating elements should be selected reasonably for vacuum furnace.

Graphite heating element: graphite has the characteristics of high temperature resistance, small thermal expansion and strong thermal shock resistance. Its mechanical strength is improved below 2500 ℃ with the increase of crushing temperature, and the best temperature is around 1700 ℃, which surpasses all oxides and metals. Graphite material has high melting point and low vapor pressure. The atmosphere of vacuum furnace contains low concentration of carbon, which will react with oxygen and water vapor in the residual gas to produce purification effect, greatly simplifying the vacuum system and reducing the cost. In the manufacturing process of vacuum furnace, graphite is generally used as heating element for heat treatment, including hearth support, insulation screen, connecting plate, connecting nut, vent pipe, etc.

Stainless steel heating element: small size, high power, fast thermal response, high temperature control precision, high comprehensive thermal efficiency, wide application range, strong adaptability, high heating temperature, long service life and high reliability. High degree of mechanization, according to customer requirements can be bent into a variety of shapes, light, easy disassembly. The utility model has the advantages of simple structure, less materials, low cost, long service life, high heat conversion rate and energy saving.

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vacuum furnace
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#2
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