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如何延长铂铑热电偶及其保护管在高温盐炉直接测控温时的使用寿命,对保证和提高高速钢工具的淬火质量意义很大。近年来虽有阴极保护法用以高温炉短时间检测炉温的报导,但尚未见到长时间用以测控炉温的消息。经我们反复试验发现,原有阴极保护法之所以达不到长期保护的作用,其主要原因是:
How to prolong the service life of platinum rhodium thermocouple and its protective tube in the direct measurement and control of temperature in high temperature salt furnace is of great significance to ensure and improve the quenching quality of high speed steel tools. In recent years, although cathodic protection has been used to detect furnace temperature for a short time in high temperature furnaces, no news of long time monitoring and control of furnace temperature has been found yet. After our repeated tests found that the original reason why the protection of the original cathodic protection effect of long-term protection, the main reason is: