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真空淬火是把工模具放进清洁的、有固定料筐的真空炉内;炉内排气至工件所需的压力;预热开始时,先有一个保温阶段,然后升到淬火温度。在整个循环过程中,真空泵起着使炉内保持低压的作用。然后,泵停止,向炉内充入相应的气体,并打开风扇,使气体在工件周围循环,促使工件温度下降至需要点。要快速冷却,以产生所需之金相结构。冷却速度
Vacuum quenching is to put the mold into a clean, vacuum oven with a fixed basket; the pressure required to vent the furnace to the work piece; at the beginning of the preheating, there is a holding stage and then the quenching temperature. During the entire cycle, the vacuum pump acts to keep the furnace low. Then, the pump is stopped, the furnace is filled with the corresponding gas, and the fan is turned on to circulate the gas around the workpiece, causing the temperature of the workpiece to drop to the point where it is needed. Rapid cooling to produce the desired metallurgical structure. Cooling rate