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用硝盐浴作等温淬火的冷却剂,有很多优点,所以在現厂里用的很普遍。为了减少热能和硝盐的損耗,工具热处理所用的硝盐浴盐槽一般都不很大,这样在連續生产的时候,就很容易使盐浴的温度升高,超过淬火温度的上限,从而影响工作的正常进行。所以在淬火的时候,怎样控制冷却剂的温度,是一个很重要的問題。我們使用的盐浴的成分是:硝酸鉀和亚硝酸鈉各50％;熔点130～40℃;盐浴使用的温度是155～245℃。过去我們采用两种冷却方法:一种是水冷法,用流动水通过蛇形盘管来冷却盐浴;一种是气冷法,利用自然通风或压縮空气吹散盐槽的热量。但这两种方法
There are many advantages to using isothermal quenching with a salt bath, so it is very common in the factory. In order to reduce the loss of heat and nitrate salt, salt bath salt baths used for tool heat treatment are generally not large, so during continuous production, it is easy to raise the temperature of the salt bath beyond the upper limit of the quenching temperature, thus affecting The normal work. Therefore, when quenching, how to control the coolant temperature is a very important issue. We use the salt bath ingredients are: 50% of potassium nitrate and sodium nitrite; melting point 130 ~ 40 ℃; salt bath temperature is 155 ~ 245 ℃. In the past we used two cooling methods: one is the water-cooled method, the flow of water through the serpentine coil to cool the salt bath; one is the air-cooled method, the use of natural ventilation or compressed air to blow salt heat. But these two methods