Abstract
The mechanism of degradation of the vacuum resistance furnaces heating elements manufactured of pure refractory metals (primarily, tungsten or molybdenum) is analysed. The algorithm of expected life calculation for such heating elements at various values of temperature and vacuum (residual pressure) in the furnace is developed and is programmatically realized. Dependences of expected life on diameter (thickness) of the heater, temperature and pressure are received. The temperature control system for the high- temperature vacuum furnace in the indirect parameter of heaters resistance taking into account their degradation is offered.
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