C ause A nalysis and C ontrol M easure of Nonconformity in U ltrasonic F law D etection for M edium H eavy P late
LIU Hui
Abstract：The reasons of nonconformity in ultrasonic flaw detection for medium heavy plate were analyzed pointing to the lower qualified rate of ultrasonic flaw testing in Jinan Steel. The statistics showed that the defect position mainly concentrate in the head and side of the plate, which proportion is up to 73.74%of statistical quantity and mostly are strip and point-like intensive defects. The defect types included the layering, segregation, porosity, white dot, inclusion and so on. The ultrasonic flaw waves were analyzed. The ultrasonic flaw detection qualified rate obviously improve and was stable to 99% by some countermeasures such as strictly controlling the content of sulfur and inclusion, improving the slab’s internal quality, ensuring the heating time, increasing single-pass reduction, strengthening remedial measures of heat treatment.
Keywords：medium heavy plateultrasonic flaw detectiondefectsslab qualityreduction
Publication Date：2013-09-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 35-36,39 )