为提高碳素结构钢和工具钢的硬度和淬透性常用ＮａＣｌ溶液作为淬冷介质。该介质在常温下的冷却能力和浓度有很大关系。在连续生产过程中 ,由于工件、工装夹具的带出 ,溶液的蒸发 ,工件自盐浴带进淬火液的盐都会使淬火液浓度发生变化 ,因此需经常测定和调整盐液浓度。由于中温 In order to improve the hardness and hardenability of carbon structural steel and tool steel, NaCl solution is often used as quenching medium. The medium at room temperature cooling capacity and concentration have a great relationship. In the continuous production process, due to the workpiece, fixture with the out of the solution evaporation, the workpiece from the salt bath into the quenching liquid salt will quench liquid concentration changes, it is necessary to determine and adjust the salt concentration. Due to the temperature