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   Pit vacuum annealing furnace mainly for various mechanical parts for vacuum annealing, stress relieving is widely used in a variety of metals, alloys, crystal materials, bright annealing, vacuum degassing and so on. Different configurations, can pass into the protective atmosphere for nitriding, carburizing heat treatment. 

     Pit vacuum annealing furnace products using pre-vacuum atmosphere protection work, the operator first furnace evacuated to a certain degree of vacuum furnace filled with an atmosphere of high purity nitrogen or ammonia decomposition protect heating, so as to achieve less non-oxidizing heating, bright decarburization purposes. Due to the use of stirring fans, the furnace has a high temperature uniformity. Long used in mechanical parts, silicon, copper, copper wire Etc. non-oxidizing bright annealing effect.