在洛氏硬度计检修过程中 ,常会遇到这种现象 :用二等标准洛氏硬度块校对硬度计时 ,在仪器各方面都很正常的情况下 ,高硬度值偏低而超差 ,低硬度值偏高超差更大。对一些初从事这项工作的同志来说 ,感觉是硬度计其它结构不正常 ,无论怎么调 ,问题仍然存在。我的做法是 :当出现这 Rockwell hardness in the maintenance process, often encounter this phenomenon: with second-class standard Rockwell hardness proofing proofing time, in all aspects of the instrument are normal circumstances, the high hardness value is too low and ultra-poor, low hardness The value of high tolerance is greater. For some comrades who started this work, the feeling is that other structures of the hardness tester are not normal. No matter how they are adjusted, the problem still exists. My approach is: when this happens