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维氏硬度计采用正四棱锥体金刚石压头,在试验力作用下压入试样表面,保持规定时间后,卸除试验力,测量试样表面压痕对角线长度d,通过查表得到维氏硬度值。维氏硬度计广泛应用于工业生产和教学科研,是机械工业生产中广泛采用的硬度测量仪器,使用率高,故障发生也较多。一、试验力超差对于负荷较大的通过杠杆砝码产生试验力的维氏硬度计,试验力可以通过以下两种方式调整:一是调整杠杆前部的游砣,调整范围比较小;对于试验力偏差较大的硬度计则需要通过调整杠杆尾部的螺杆来改变杠杆比,从而实现对试验力的调整。
Vickers hardness tester with a regular pyramid diamond indenter, pressed into the surface of the specimen under the action of the test force, after a specified time, remove the test force, measuring the surface of the sample indentation diagonal length d, through the look-up table to obtain dimension Hardness value. Vickers hardness tester is widely used in industrial production and teaching and research, is widely used in machinery industry hardness measurement instruments, the use of high, the failure occurred more. First, the test force tolerance For the larger load through the lever weight to produce test force Vickers hardness test force can be adjusted in the following two ways: First, adjust the front of the lever tour, the adjustment range is relatively small; for Hardness deviation of the test force is larger than the need to adjust the leverage of the tail of the lever to change the lever ratio, in order to achieve the adjustment of the test force.