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Título: | Thermomechanical Treatments of Ultrahigh Carbon Steels and Optimal Microstructures to Improve Toughness |
Autor: | Carsí, Manuel CSIC ORCID; Fernández Vicente, A.; Sherby, O. D.; Peñalba, F.; Ruano, Oscar Antonio CSIC ORCID | Palabras clave: | Fracture Thermomechanical Treatment (TMT) Ultra High Carbon Steel |
Fecha de publicación: | 2007 | Editor: | Trans Tech Publications | Citación: | Materials Science Forum 539-543 : 4826-4831 (2007) | Resumen: | Thermomechanical processing allows the attainment of spheroidized microstructures that show improved mechanical properties. In this work, a thermomechanical processing route consisting of two steps was developed for two ultrahigh carbon steels (UHCS) containing 1.3 and 1.5%C. This route develops structures of fine spheroidized cementite particles in a fine-grained ferrite matrix. Spheroidized microstructures are formed by eutectoid carbide particles in the UHCS- 1.3C and by proeutectoid and eutectoid carbide particles in the UHCS-1.5C. In the latter steel, the proeutectoid carbide particle size is larger than the eutectoid carbide particle size. The carbide size distribution remains basically constant with austenitizing temperature for both steels. Plane-strain fracture toughness of spheroidized UHCS-1.3C is higher than for UHCS-1.5C, about 80 vs 40 MPa m1/2. These values do not vary significantly with austenitizing temperature which is attributed to the constancy of the mean proeutectoid and eutectoid carbide size. | Versión del editor: | http://dx.doi.org/10.4028/www.scientific.net/MSF.539-543.4826 | URI: | http://hdl.handle.net/10261/58780 | DOI: | 10.4028/www.scientific.net/MSF.539-543.4826 | ISSN: | 0255-5476 |
Aparece en las colecciones: | (CENIM) Artículos |
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