How should the hardness of tungsten alloy screws be measured? Mainly using Rockwell hardness (HRC), Vickers hardness (HV), and Brinell hardness (HB) methods. First, Rockwell hardness: Standard test HRC 25-35, using diamond indenter penetration, evaluating surface hardness, suitable for quick detection of screw deformation resistance. Second, Vickers hardness: HV 250-350, calculated via diamond pyramid indentation area, precisely measuring microscopic hardness, applicable to thin layer analysis. Third, Brinell hardness: HB 200-300, using hard ball indenter, suitable for large samples, reflecting overall hardness. Fourth, nanoindentation testing: For local hardness evaluation, measuring elastic modulus (300-400GPa). Fifth, influencing factors measurement: Alloy compositions like W-Ni-Fe increase hardness, post-heat treatment hardness rises 10%. Hardness correlates with wear resistance, high hardness ensuring low friction. Overall measurement combines standards like ASTM E18, ensuring hardness stability at high temperatures, advancing application optimization.
