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Formability of High‐Alloy Dual‐Phase Cr‐Ni Steels
Author(s) -
Elfmark Jiri
Publication year - 2004
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.200405954
Subject(s) - formability , materials science , dual phase steel , alloy , metallurgy , torsion (gastropod) , recrystallization (geology) , deformation (meteorology) , ultimate tensile strength , composite material , microstructure , martensite , medicine , paleontology , surgery , biology
The formability of dual‐phase high‐alloy Cr‐Ni steel within the temperature range from 900 to 1250°C was studied using laboratory tensile and torsion tests. The dual‐phase steels on 24% Cr basis are characterized by poor hot formability due to very low stable deformation values and slow recrystallization. Mathematical description of deformation stability exhaustion was derived, as well as a model of formability control based on analysis of the gradual diffuse deformation stability from the stability limit to the moment when the deformation starts to concentrate in a small volume of the test piece. Rolling simulation of dual‐phase steel strip was used as an example demonstrating the draught scheme optimization technique which avoids the danger of crack occurrence during the rolling of dual‐phase steel strip.