Hardness is an important mechanical performance index reflecting the elastic-plastic deformation characteristics of materials. The strength of materials can be estimated through the corresponding calculation of hardness values. Therefore, material hardness testing is widely used in practical production.

Commonly used hardness measurement methods are divided into: Rockwell hardness (HRC) measurement method, Brinell hardness (HBW) measurement method, Vickers hardness (HV) measurement method, ultrasonic hardness tester.

However, the Rockwell hardness method is easy to operate and has high measurement efficiency, so it is widely used in the heat treatment process of materials and the detection of final products. However, the Rockwell hardness method is easy to operate and has high measurement efficiency, so it is widely used in the heat treatment process of materials and the detection of final products.