This test method covers the hardness testing of cemented carbides by use of a Rockwell hardness tester performing tests in the Rockwell HRA scale (regular scale, diamond indenter, 10 kgf [98.07 N] preliminary test force, and 60 kgf [588.4 N] total test force in the range of Rockwell 80 HRA and above). Also covered are the procedures for the testing and selection of diamond indenters, the management and traceability of the four levels of standardized test blocks, and the making and calibration of Primary, Secondary, and Working standardized test blocks. The Rockwell hardness tester is a convenient and reliable means of measuring the hardness of cemented carbides. A hardness value is obtained easily, but it is subject to considerable error unless certain precautions are observed.
KeywordsCemented Carbides - Rockwell Hardness - Rockwell Hardness Test
ICS CODE77.040.10 (Mechanical testing of metals)
ASTM B294-17, Standard Test Method for Hardness Testing of Cemented Carbides, ASTM International, West Conshohocken, PA, 2017, www.astm.org