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Vol.20, No.6, 507 ~ 513, 1982
Title
Influence of Initial Structure of Low Carbon Dual Phase Steels on Mechanical Properties
윤문섭Moon Sup Yoon, 권숙인Sook In Kwun
Abstract
A study has been made of the mechanical properties of dual phase steels quenched from the austenite plus ferrite phase region to replace two kinds of initial structures (ferrite-pearlite and martensite) by ferrite-martensite structure. The distinct initial microstructures yielded different morphologies of martensite after annealing though the volume fraction of martensite remained almost the same. The volume fraction of martensite was varied from 15% to 80% by various annealing temperatures. The strength of dual phase steels was dependent on the volume fraction of martensite and independent of the morphology of martensite. However, the ductility of the dual phase steel having finer martensite particles resulted from 100% martensite initial structure was superior to that having coarser martensite particles resulted from ferrite-pearlite initial structure.
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