Deep Drawability and Recrystallization Texture of Rephosphorized Al-killed High Strength Cold-rolled Steel

Abstract

The deep drawability and the recrystallization texture of rephosphorized Al-killed high strength steels (P: -0.07%) were studied as compared with those of a conventional Al-killed steel (P: 0.016%).A rephosphorized Al-killed steel shows the peak r-value at a certain heating rate in annealing as well as a conventional Al-killed steel. However, phosphorus slightly weakens the retardation effect of AlN on recrystallization, which results in a lower r-value and a lower grain elongation ratio. The preferred orientation of a rephosphorized Al-killed steel is {111} <112> though that of a conventional Al-killed steel is {111} <110>.These results are discussed by taking into account the interaction between phosphorus and AIN precipitation behavior.