Výroba a tepelné zpracování trubek C90 a T95

Abstract

The aim of this thesis was propose appropriate heat treatment for tubes C90 and T95 grade. The next point was to develop CCT diagram for this steel, numeric simulation of cooling tubes at hardening and then comparing results from Material and metalurgical research and tube mill owned by Třinec's ironworks. The heat treatment was developed on Material and metalorgy research, verification and modification of projected heat treatment was developed on tube mill. Temperatures of austenitizing were determined to 890°C on both workplaces. Temperatures of tempering, however, unilke the prosposed austenitizing temperatures, had to be modificated. This is to meet the requiement to grade C90 and T95.