Due to their high hardness, wear resistance, and excellent mechanical properties, tungsten cemented carbide balls are widely used in precision bearings, valve seals, and measuring instruments. Their surface quality directly impacts service life, sealing performance, and operating accuracy, making surface quality inspection a critical step in production and application. Surface quality inspection primarily focuses on defects (such as cracks, pits, scratches, and pores), roughness, uniformity, and residual stress. The following introduces several commonly used inspection methods, combining traditional techniques with…