It belongs to non-destructive test, and the test method is relatively simple. The hardness test of cemented carbide has a strong adaptability to the shape and size of the test piece, and the test efficiency is high. In addition, there is a certain relationship between the hardness of cemented carbide and other physical properties. For example, the hardness test and tensile test of cemented carbide are basically to detect the ability of metal to resist plastic deformation. To some extent, these two tests are to detect the similar characteristics of metal. Therefore, the test results can be compared with each other. For many metal materials, there is a conversion table for hardness test and tensile test. Therefore, when testing the mechanical properties of cemented carbide materials, more and more hardness tests are used, and less tensile tests are used.
The hardness of cemented carbide is mainly measured by Rockwell hardness tester and HRA hardness value. Phr Series Portable Rockwell hardness tester is very suitable for testing the hardness of cemented carbide. The weight accuracy of the instrument is the same as that of the bench Rockwell hardness tester, so it is very convenient to use and carry.
Cemented carbide is a kind of metal. Hardness test can reflect the difference of mechanical properties of cemented carbide materials in different chemical composition, structure and heat treatment process. Therefore, hardness test is widely used in the performance test of cemented carbide, the correctness of heat treatment process and the research of new materials.
Generally, hardness of cemented carbide is measured by HRA scale of Rockwell hardness tester or Vickers hardness tester. Phr Series Portable Rockwell hardness tester is very suitable for testing the hardness of cemented carbide. The instrument weighs only 0.7kg and has the same accuracy as the bench Rockwell hardness tester. When measuring the hardness of cemented carbide, the PHR Series Portable Rockwell hardness tester produced by Tianxing company can test the cemented carbide workpiece with thickness or diameter less than 50mm, the cemented carbide workpiece with diameter as small as 2.0mm, and the tubular cemented carbide workpiece with inner diameter less than 30mm. It can also be used in production site, sales site or material warehouse. This instrument is simple, rapid and nondestructive for testing hard alloy workpieces. It can be used to test the hardness of finished or semi-finished hard alloy workpieces one by one.