Influencia del proceso de revenido en el comportamiento mecánico de un acero de fase dual de uso industrial automotriz/Influence of tempering process on the mechanical behavior of dual phase steels for automotive applications

• Published in: Ingeniare : Revista Chilena de Ingenieria Vol. 24; no. 1; p. 94
• Main Authors: Rodríguez-Baracaldo, Rodolfo, Arroyo-Osorio, José Manuel, Parra-Rodríguez, Yeison
• Format: Journal Article
• Language: Spanish
• Published: Arica Universidad de Tarapacá 01.01.2016
• Subjects: Annealing; Mechanical properties; Microstructure; Steel; Temperature effects
• ISSN: 0718-3291

In this paper was analyzed the influence of annealing treatment on the microstructure and mechanical properties of ferrite-martensite of dual phase of high strength steel DP580. The analyzed microstructural transformations were the result of applying the annealing process in a temperature range of 150 to 500 ° C. Metallographic and fractographic analysis were performed on the initial steel and heat-treated steel by using optical and electron microscopy. Modifications in mechanical properties were evaluated by uniaxial tensile tests and by microhardness tests. It was observed that the used range of annealing temperatures affects gradually the microstructure, allowing obtaining different combinations of steel strength and ductility. The effects of annealing heat treatment on the dual phase steel analyzed are the result of a synergistic effect between the transformations in the martensite phase and ferrite phase.