Laboratorní simulace válcování slitiny AlMg3 za tepla

Abstract

The aim of this bachelor thesis was plastometric simulation of rolling in order to determine the influence of finish rolling temperature (in range from 250 to 350 °C) and additionally also the strain rate on the structural and mechanical properties of alloy Al Mg3 (EN AW-5754), which is rolled at AL INVEST Břidličná , a.s. With using Hot deformation simulator HDS-20 was programmed ten high pass with uniform size of 10.4 %, which resulted in upsetting of the initial sample height of 15 mm to final height of 5 mm. All passes were realized with uniform strain rate of 3 s-1. Additionally two samples were deformed at uniform strain rate of 13 s-1. Based on evaluation of metallographic analyses can be assumed that final microstructure mainly influenced accumulation of hardening from of partial passes, while there was a significant suppressing of softening processes. Lower finish rolling temperatures resulted only to a gradual increase hardness HV10.