By combining ultrasonic surface wave and magnetic particle testing,precise positioning sampling was carried out on cold rolling rolls with surface wave defects.Defect identification and analysis were carried out on the samples using optical metallographic microscope,scanning electron microscope,and energy dispersive spectrom-eter.The results showed that the main causes of surface wave defects in cold rolling rolls were inclusions and pores.By targeted control of electrode billet production,electroslag remelting,forging,and rough machining processes,the probability of surface wave problems was reduced and product quality was improved.
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