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由于真空热处理炉发热元件的材料和结构直接影响真空炉的效率和使用寿命,因此合理选择发热元件是真空炉的关键问题之一。本文就真空炉的发热元件材料和结构型式进行了简要的分析和探讨。真空炉的发热元件随使用温度而异。根据不同材料的特性又可选用不同的结构型式。例如炉温在1200℃以下时,可用 Cr20Ni80镍铬合金作为发热元件,炉温在1200℃到1600℃时可用金属钼作为发热体,在2000℃时可用石墨,在2000℃到2500℃时可用钽或钨。
As the material and structure of the heating element of the vacuum heat treatment furnace directly affect the efficiency and service life of the vacuum furnace, the reasonable choice of the heating element is one of the key problems of the vacuum furnace. This text has carried on the brief analysis and the discussion to the material and the structure type of the heating element of the vacuum furnace. The heating element of the vacuum furnace varies depending on the temperature used. According to the characteristics of different materials can choose different types of structures. For example, when the furnace temperature is below 1200 ℃, Cr20Ni80 nickel-chromium alloy can be used as the heating element. When the furnace temperature is between 1200 ℃ and 1600 ℃, metal molybdenum can be used as the heating element, graphite can be used at 2000 ℃, tantalum Or tungsten.