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一、压力对淬火介质冷却特性的影响热力学告诉我们,任何液体处于密闭的容器内加热时,其沸点与密封容器内的压力有关,当压力增加时,液体沸点也提高;反之,液体沸点下降。以水为例,在正常的一个工程大气压下,(敞开容器)水的沸点约为100℃,如果气压较低,水的沸点就低于100℃,如果容器内压力大于1个大气压,水的沸点就高于100℃。表22为水在不同压力下的沸点。从表22看出,当水处在20个大气压作用下,沸点可达200℃以上。这
First, the pressure on the quenching medium cooling characteristics Thermodynamics tells us that any liquid in a closed container when heated, the boiling point of the pressure in the sealed container, when the pressure increases, the liquid boiling point also increased; the other hand, the liquid boiling point decreased. Taking water as an example, the boiling point of water (open vessel) is about 100 ° C at one normal atmospheric pressure and the boiling point of water is less than 100 ° C at lower atmospheric pressures. If the pressure in the vessel is greater than 1 atm, Boiling point is higher than 100 ℃. Table 22 shows the boiling points of water at different pressures. As can be seen from Table 22, when the water at 20 atmospheres, the boiling point of up to 200 ℃. This