Válcování oceli TWIP v laboratorních podmínkách za tepla a za studena

Abstract

TWIP steels with content of 17 to 20 % of manganese are fully austenitic and non-magnetic, without any phase transformation. The steels TWIP are very attractive especially thanks their high capability of absorption of gust energy, which is more as two-fold in comparison with the conventional highly tenacious steels. Except of their content of manganese and carbon (from 0.4 to 0.9 %) these steels can be alloyed with next additives in particular with Si or Al (from 2 to 4 %).Owing to the claiming of the twinning mechanism the TWIP-steels are able to satisfy a great number of technical requirements for production of cars. The primary experimental results of the TWIP-steels show the high end tensile strength of 600 to 1100 MPa und extreme values of ductility at intervals from 60 % to 90 %.The major section of the experimental works was focused on the monitoring of the influence of the forming work on the structural and the mechanical characteristics of the highly solid TWIP-steels Fe-Mn in dependence on the different chemical structure of the particular samples.