Caracterización microestructural por ebsd de la formación de la ferrita secundaria entre la temperatura de sostenimiento y la etapa de enfriamiento lento en un acero bifásico (dp 980) galvanizado
Los aceros bifásicos viven un desarrollo de relevante importancia en las últimas décadas en el sector industrial en todo el mundo; porque este tipo de acero corresponde al grupo de aceros avanzados de alta resistencia. El acero bifásico está constituido principalmente por una matriz ferrítica (const...
- Autores:
-
Urbina Leal, David Alexander
- Tipo de recurso:
- http://purl.org/coar/version/c_b1a7d7d4d402bcce
- Fecha de publicación:
- 2016
- Institución:
- Universidad Industrial de Santander
- Repositorio:
- Repositorio UIS
- Idioma:
- spa
- OAI Identifier:
- oai:noesis.uis.edu.co:20.500.14071/34935
- Palabra clave:
- Aceros Bifásicos
Recocido Continuo
Laminación En Frío
Propiedades Mecánicas.
The dual phase steels live a development of significant importance in recent decades in the industrial sector worldwide; because this type of steel belongs to the group of advanced high strength steels. The dual-phase steel is primarily of a ferritic matrix (soft constituent) and martensite (hard constituent)
which give it its characteristic properties: an excellent ductility and high mechanical strength for the different industries applications. It is possible to cite
for example
the automotive field
in which the steel permits construction of safer vehicles
with less weight and greater efficiency in fuel consumption. In this study
the dual-phase steel 980MPa galvanized
cold rolled with 80% reduction
which is meant to examine the influence of different process conditions of continuous annealing on the mechanical properties of dual phase steels and the secondary ferrite formation in the final structure. The methodology for the study involved the following steps: isochronous annealing was made of four sheets at different temperatures from 720°C and 900°C and then they were exposed to two different cooling methods: immediately cooling in the water or maintain a temperature below the annealing for 600 s and then cooling in water. With the analysis of the results
it was realized that was formed large amount of new ferrite (called secondary ferrite) to replace the martensite in the final structure. This occurred for two main reasons: with the highest soaking temperature
there will be greater fraction of austenite and martensite consequently; on the other hand
a lower soaking temperature and a smaller secondary cooling temperature generate a larger fraction of ferrite. Anyway
this greater amount of ferrite has a direct effect on the mechanical properties of the dual-phase steel
- Rights
- License
- Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)