What are the hardness symbols and parameters of the diamond segment?

There are several ways to express the hardness of diamond segment, and the common ones include:
1: Rockwell hardness: it is a method to measure the hardness by the change of the surface depth of the diamond segment under a specific pressure. It is expressed in "HRA", which is often used to describe the diamond segment with high hardness. If it is necessary to measure the hardness of the diamond segment, it can be tested with a Rockwell hardness tester. The specific operation method is as follows:

1) Place the diamond segment on the hardness tester pedestal so that its surface is perpendicular to the hardness tester indenter;

2) Use the indenter of the hardness tester to press the diamond segment, and record the depth and reading of the indenter;

3) According to the recorded data, calculate the Rockwell hardness value of the diamond segment.

It should be noted that the hardness value of the diamond segment should be within a certain range. Too high or too low hardness will affect the lifespan and cutting effect of the blade. Generally speaking, the hardness of the diamond segment should be between 80 and 100 Rockwell degrees (accurately speaking, 80-98HRA), and the specific value can be adjusted according to the actual situation.

Mohs hardness: the comparison is based on the relative hardness between different minerals. Mohs hardness is a relative hardness index. There is no specific numerical value, but it is often used to compare the hardness.

When testing the Mohs hardness of the diamond segment, it is necessary to scratch the diamond segment on the Mohs hardness tester against the diamond segment, and judge the Mohs hardness level of the diamond segment according to the depth and shape of the scratch. Usually, the Mohs hardness of diamond is around 10, which is one of the hardest substances in nature. The hardest part of the cutter head is 10 due to the addition of diamond powder, while the average Mohs hardness of other parts is above 9. Therefore, we believe that the Mohs hardness of the diamond segment is usually between 9 and 10.

Vickers hardness (Vickers hardness): It is a method of indenting the surface of an object with a diamond tip, expressed in "HV", and is often used to measure the hardness of a small area, such as diamond micropowder, thin film, etc.

The Vickers hardness of the diamond segment is about 7000HV. Vickers hardness is a commonly used hardness measurement method, which is usually used to test the microhardness of materials, especially for relatively fragile materials such as ceramics and crystals. This test method uses an indentation hardness tester to calculate the hardness value of a material by applying a quantitative pressure on the surface of the material and measuring the size of the impression. Diamond is the hardest natural substance known so far, and its Vickers hardness is extremely high, so it can be used to process and grind many materials with lower hardness.

Brinell hardness: It is a method to calculate the hardness by applying a certain pressure on the surface of the object by the indenter, and then measuring the diameter of the indentation. It is expressed in "HB", and is often used to test rougher diamond segments.

The Brinell hardness of the diamond segment is generally between 8000-10000, which is a very hard material.
Different hardness testing methods are suitable for different types and sizes of diamond segments, so it is necessary to choose a suitable testing method to measure the hardness accurately.