Effect of Test Speeds on Surface Roughness Test Results of Cold Rolled Steel Strip

In GB/T 2523-2008, the moving speed of the contact surface roughness meter is generally 0.5 mm ·s^-1. In order to improve the moving speed of the contact surface roughness meter, shorten the detection period of the surface roughness and improve the detection efficiency, special comparative tests were carried out. The effects of test speeds on the test results of average surface roughness R_a and peak count PPI were analyzed. The results show that for the samples with the surface roughness in the range of 0.6-1.6 μm, there is no significant difference between the measured R_a and PPI at test speeds of 1.0 mm ·s^-1 and 1.5 mm ·s^-1 and at test speed of 0.5 mm ·s^-1, but when the test speed increased to 2.0 mm ·s^-1, there is a significant difference between the measured R_a and PPI when the test speed is 0.5 mm ·s^-1.