采用直径为D的球形压头，以相应的试验力F压入材料的表面，经规定保持时间后卸除试验力，用读数显微镜测量残余压痕平均直径d，用球冠形压痕单位表面积上所受的压力表示硬度值。实际测量可通过测出d值后查表获得硬度值。

A spherical indenter with diameter D is used to press the corresponding test force F into the surface of the material, and the test force is removed after the specified holding time. The average diameter of the residual indentation d is measured with a reading microscope, and the hardness value is expressed by the pressure on the unit surface area of the spherical crown indentation. The actual measurement can obtain the hardness value by checking the table after measuring the d value.