Resumen de The effect of grain refinement on the mechanical properties of a micro alloyed steel
M.A. Suárez, O. Álvarez, M. A. Alvarez Pérez, R. Herrera, C. Zorrilla, S. Valdez, J. A. Juárez Islas
High strength low alloy steel was produced by electric are furnace, vacuum degassing, ladle treatment and continuous casting route. The steel was hot rolled by applying a schedule to simulate industrial control of hot rolling procedure for the production of plates as closely as possible in laboratory level, in order to investigate the effect of applying different strain rates into hot rolling procedure in the range of temperatures between 1250 to 900ºC. After the hot rolling procedure, the palte wasa spray cooled at a cooling rate of 5ºC/s to a temperature of 650ºC and the cooled to room remperature. The results showed a train refinement as a function of the strain rate increases from 1 to 8 s(-1) and as a consequence an increase in mechanical properties of: yield strength and ultimate tensile strengthe; and keeping almost constant the ductility.
