HT-1000A和HT-2000A里氏硬度计是采用动态测试原理来确定硬度的，它对被测工件的要求有别于静态测试法(如台式硬度计)，满足以下要求即可选用本仪器：

1.被测工件的重量应≥3kg且被测点的厚度≥20mm；
2.被测工件表面曲率半径一般应R≥30mm，若R=10~30mm应选购异型支承环；
3.被测部位的粗糙度应满足Ra≤2μm; 4.被测工件≤3kg或厚度在3~30mm的形状规 则密室工件要耦合在工作平台上；
5.表面硬化处理的工件，其硬化层厚度应≥0.8mm.


 

The HT-1000A and HT-2000A hardness testers operate on the Leeb principle, a dynamic hardness test b based on velocity measurement. They include a guide tube and an impact body. The impact body contains a magnet and tungsten-carbide ball, measurements are perbed using a spring to propel an impact body through a guide tube towards the test surface. When the ball is within 1 mm of the part’s surface, the magnet induces a voltage into a coil surrounding the guide tube. After penetration, the impact body rebounds and the magnet returns through the coil inducing a second voltage. Both voltages are proportional to the velocity of the impact body.