The measurement methods of cemented carbide hardness mainly include the following:
- Rockwell hardness test: Use a standard Rockwell hardness indenter to perform an indentation test on the sample, and calculate the hardness value based on the indentation depth. This method can use different load and indenter combinations and is suitable for different types and states of cemented carbide.
- Vickers hardness test: Use a diamond indenter with a certain load to perform an indentation test on the surface of the sample, and calculate the hardness value based on the indentation area. This method uses a small load and a small indenter, and is suitable for hardness testing of thin-layer cemented carbide with high surface hardness.
- Microhardness test: Use a nano- or micron-level indenter to perform an indentation test on the surface of the sample, and calculate the hardness value based on the indentation depth or indentation area. This method has high accuracy and spatial resolution, and is suitable for measuring the hardness of cemented carbide surface coatings, hardened layers, etc.
- Shore hardness test: Use an impact body of a certain mass to impact the surface of the sample, and calculate the hardness value based on parameters such as impact time and bounce height. This method has faster testing speed and higher accuracy, and is suitable for rapid hardness testing in the cemented carbide production process.
- Knoop hardness test: Use a long strip indenter to conduct a scratch test on the surface of the sample, and calculate the hardness value based on the scratch length and the depth of the remaining scratches. This method is suitable for hardness testing of cemented carbide sheets, strips and other materials.
The above common cemented carbide hardness testing methods each have their own characteristics and scope of use, and can be selected according to specific application scenarios.
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