A study of the structure of forged pieces of 75X3MΦ steel using the ultrasonic method for quality control

Abstract

The microstructures of 75X3MΦ steel specimens that were sampled from forged pieces of support shafts of rolling mills was investigated. A correlation between the presence of a carbide network and increased attenuation of ultrasonic waves was established. Ultrasonic testing was performed using a Krautkremer ultrasonic flaw detector. The microstructure was studied using conventional metallographic-analysis methods. The nanoindentation method was used to measure the Young modulus of the phase components of 75X3MΦ steel specimens, carbides, and the matrix. A comparative evaluation of their acoustic characteristics was performed. © 2012 Pleiades Publishing, Ltd.