在国内供应的成套高温盐炉,大都配备辐射高温计,由于条件上的限制,加之仪器误差大,有些单位在使用时很难掌握,尤其高速钢工件淬火,需严格地控制温度才能保证产品质量。过去,我们亦曾用辐射高温计测量和控制温度,但工作起来较烦琐复杂,产品质量不稳,有时甚至报废。以后改用石英玻璃套管配铂铑热电偶,电子电位差计控制温度,效果尚好。但高温时容易腐蚀,且价格昂贵,不如瓷管经济耐用。用磁管时,只要在使用前充分预 In the domestic supply of complete sets of high-temperature salt furnace, most equipped with a radiation pyrometer, due to the limitations of the conditions, combined with large equipment errors, some units difficult to master when in use, especially high-speed steel parts quenching, the temperature must be strictly controlled to ensure product quality . In the past, we also used the radiation pyrometer to measure and control the temperature, but it was complicated to work with, the quality of the product was unstable and sometimes it was discarded. After the switch to quartz glass tube with platinum rhodium thermocouple, electronic potentiometer control temperature, the effect is still good. However, when the high temperature easily corroded, and expensive, not as economical and durable porcelain. When using a magnetic tube, as long as the pre-full before use