Classification of Hardness Testers
- According to the degree of complexity: simple hardness tester, complex hardness tester
- According to the measured hardness unit: Rockwell hardness tester, Vickers hardness tester, micro hardness tester, Brinell hardness tester, Shore hardness tester, Barcol hardness tester, Leeb hardness tester, Webster hardness tester, Shore hardness Durometer, Blovi hardness
- According to the way of use: portable hardness tester, desktop hardness tester
The Use of Hardness Tester
- Rockwell hardness tester is used to measure the Rockwell hardness value of cast iron and other workpieces
- Vickers hardness tester for Vickers hardness measurement of thin workpieces
- Brinell hardness tester is used to measure the Brinell hardness of workpieces with higher hardness
- The Leeb hardness tester is a portable hardness tester for hardness value measurement of products that are not suitable for disassembly or large
- Shore hardness tester is used to measure the shore hardness value of rubber products
- Webster hardness tester is used to measure the Webster hardness value of aluminum alloy products
- Barcol hardness tester is used to measure the barcol hardness value of glass fiber reinforced plastic products
- Universal hardness tester is used for hardness value measurement under various hardness scales
- Micro hardness tester is a kind of Vickers hardness tester, which is used to measure the Vickers hardness value of very thin workpieces.
- Shore hardness tester is used to determine the shore hardness value of ferrous and non-ferrous metals
- Brinell/Rockwell/Vickers hardness tester for hardness determination of ferrous, non-ferrous, cemented carbide, carburized and chemically treated layers
Hardness requirements: HS<100, HB<500, HRC<70, HV<1300, HRA (80~88), HRB (85~95), HRC (20~70)
In Rockwell hardness, A, B, C in HRA, HRB, HRC, etc. are three different standards, called scale A, scale B, scale C.
Rockwell hardness test is one of several common indentation hardness tests used today. The initial pressure of the three scales is 98.07N (10kgf), and finally the hardness value is calculated according to the indentation depth. Ruler A uses a diamond indenter, then pressurized to 588.4N (60kgf); Ruler B uses a steel ball with a diameter of 1.588mm (1/16 inch) as the indenter, and then pressurized to 980.7N (combined 100kgf); and ruler C uses the same diamond as ruler A as the indenter, but the force after pressing is 1471N (150kgf). Therefore, the scale B is relatively soft. Practice has proved that there is an approximate corresponding relationship between the hardness value and the strength value between various hardness values of metal materials. Because the hardness value is determined by the initial plastic deformation resistance and the continued plastic deformation resistance, the higher the strength of the material, the higher the plastic deformation resistance, and the higher the hardness value. However, the conversion relationship of various materials is not consistent.