Hardness Test Aids Evaluation

Brinell hardness test: Using a carbide ball of a certain diameter, under a specified load and time, it is pressed into the surface of a copper bushing and the diameter of the indentation is measured to obtain a Brinell hardness value. Higher hardness copper bushings usually have better wear resistance because the increased hardness makes the surface more difficult to be worn and scratched.

Rockwell hardness test: the use of diamond cone or carbide ball as the indenter, in the initial test force and the main test force under the successive action, measure the depth of the indentation, and then determine the Rockwell hardness value, Rockwell hardness test operation is simple, rapid, can be read directly from the dial of the hardness tester hardness value, suitable for large-scale production of finished product inspection.

Vickers hardness test: the use of the relative surface angle of 136 ° of the positive tetragonal cone diamond indenter, in the specified load and holding time, the surface of the copper sleeve indentation test, through the measurement of the indentation of the diagonal length of the calculation of the Vickers hardness value, Vickers hardness test of the indentation of the contour of a clear, accurate measurement of the diagonal hardness value of the error is relatively small, for the measurement of the hardness of the surface of the copper sleeve or the thinner copper sleeve hardened layer.