• López Baltazar, Enrique Alejandro

Abstract

<jats:p>Interrupted cooling in the run-out table after hot rolling is a processing strategy to produce dual phase ferrite-martensite steel strips. The effects of interrupted cooling temperature and time after austenitizing at 1150 °C are investigated. This is done to establish the conditions for austenite to transform into ferrite-martensite microstructures in a Mn-Cr-Mo strip produced from a CSP (Continuous Strip Processing)-type thin slab. The results show that dual phase microstructures can only be obtained when interrupted cooling is performed at 725&lt;T&lt;800 °C. The amount of martensite and the strength level that can be developed increase as the interrupted cooling temperature increases. Formation of pearlite during the isothermal holding causes a rapid decrease in the level of strength that can be developed in this type of structural material.</jats:p>

Topics

• impedance spectroscopy
• microstructure
• phase
• strength
• steel
• hot rolling