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Influence of Mn and Si contents on structure and mechanical properties of ferritic‐pearlitic HSLA steels
Author(s) -
Richter Johannes,
Güth Albert,
Köthe Alfred,
Backmann Günter
Publication year - 1993
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.199301021
Subject(s) - charpy impact test , pearlite , metallurgy , materials science , ferrite (magnet) , toughness , homogeneous , manganese , ultimate tensile strength , composite material , microstructure , austenite , physics , thermodynamics
Laboratory melts of microalloyed low carbon steels with an increased silicon content of about 1 % and manganese contents between 0.3 and 1.3 % were thermomechanically rolled in a laboratory two‐high rolling stand to plates of about 10 mm in thickness. The influence of chemical composition and finish rolling temperature ( FRT ) on the ferrite‐pearlite structure of the plates (tensile and Charpy impact tests) was investigated. The choice of the temperature range of finish rolling with respect to the γ/α transformation start temperature strongly influences the ferrite‐pearlite structure and the mechanical properties. The most fine‐grained and homogeneous ferrite‐pearlite structure and the best combination of strength and toughness have been obtained with steels containing about 1 % Mn and 1 % Si rolled with a finish rolling temperature of about 850°C.