Förfarande för bedömning av renheten hos metalliska material baserat på felbestämning med ultraljud och metalliska material försedda med renhetsbedömning

摘要

Cleanliness of a metallic material to be tested is provided. The method includes the steps of setting n inspection fields in predetermined portions of the metallic material to be tested, scanning each inspection field by ultrasonic flaw detection method for non-metallic inclusions in the metal thereby to determine the maximum non-metallic inclusion diameter aj (j=1,n), and calculating the estimated maximum non-metallic inclusion diameter amax in the metallic material to be tested from the maximum non-metallic inclusion diameter aj (j=1,n) determined for each inspection field, thereby evaluating the cleanliness of metallic materials quickly with high accuracy and high reliability.