我厂淬火采用过饱和食盐水溶液,这种冷却剂经多年使用性能很稳定,淬火时废品率低,在用于模具淬火时变形小,开裂和软点等现象也可以避免。我们在处理45钢零件时采用780℃淬火,保温和一般盐浴炉加热系数一样计算,这样淬火后硬度可达 HRC 45～50。对其它高碳钢零件可按常规温度,淬火后的硬度和淬入5～15%盐水硬度一样,淬火时水温不要超过 I quench the plant salt water solution used, this coolant after many years the use of performance is very stable, low rejection rate quenching, used in mold quenching small deformation, cracking and soft spots and other phenomena can also be avoided. When we deal with 45 steel parts with 780 ℃ quenching, insulation and salt bath furnace heating coefficient of the same calculation, so that the hardness after quenching HRC 45 ~ 50. For other high-carbon steel parts can be conventional temperature, hardness after quenching and quenching into 5 ~ 15% brine hardness, quenching, the water temperature should not exceed