显微硬度试验产生的压痕呈现在显微镜视场的中心,这是显微硬度计能否使用的首要条件。由于使用和保管不善等原因,压头和物镜相对位置发生了变化,习惯叫不同心,使试验后在视场内找不到压痕,这是许多使用中的硬度计经常出现的毛病,也是检修人员感到较为麻烦的问题。过去我们调修时是在试块上用金属铅笔作一标记,借助标记来寻找压头与光轴偏离的方向和距离。由于压痕极小,定位困难,往往要几个小时才能摸准。现介绍一种简 The indentation produced by the microhardness test appears at the center of the microscope’s field of view, which is the primary condition for the use of the microhardness tester. Due to poor use and storage and other reasons, the relative position of the head and the objective has changed, used to call different hearts, so that after the test in the field can not find the indentation, which is frequently used in many problems with the hardness, but also Maintenance staff feel more troublesome problem. In the past when we were repaired with a metal pencil on the test block as a marker, with the help of markers to find the direction and distance offset head and optical axis. Due to the indentation is extremely small, positioning difficulties, often a few hours to touch the standard. Now introduce a kind of Jane