Test of Large Inclusions in Bearing Steel by High Frequence Ultrasonic C-scan

Large inclusions have a significant impact on the fatigue life of bearing steel.The evaluationmethods for inclusions in bearing steel were compared and analyzed.Bearing steel were tested by high frequenceultrasonic C-scan,and using metallographic method to validate the results.The results showed that the testingmethod of high frequence ultrasonic C-scan was effective for the testing of large inclusions in bearing steel.