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本文从应用观点出发,利用不同热处理方法的镍铬——镍铝套管偶或者是镍铬、镍铝偶丝,进行热电势测试。发现在试验中,由于镍铬10合金的有序转变而使电偶在350℃测温时,产生2～3℃的误差。这对于高精度高可靠性的电偶来说,是不允许的。因此寻找了一种稳定化处理(时效处理)工艺,使得凡经过这种处理的套管偶,在400℃以下工作,不但精度高,而且稳定性好。在350℃工作10000小时后,电势变化不超过0.5℃。
This article from the application point of view, the use of different heat treatment of nickel-chromium-nickel-aluminum sleeve even or nickel-chromium, nickel-aluminum wire, thermocouple test. It was found during the test that an error of 2 to 3 ° C was observed when the galvanic couple was measured at 350 ° C due to the orderly transformation of the Ni-Cr-10 alloy. This is not allowed for high accuracy and reliability of the galvanic couple. Therefore, looking for a stabilization treatment (aging treatment) process, so that after this treatment even dual casing, work below 400 ℃, not only high precision and good stability. After working at 350 ℃ for 10000 hours, the potential change does not exceed 0.5 ℃.