Abstract
It is still possible to optimise the newly developed continuous annealing process for sheet steel production with respect to the properties of the product. In the present contribution, the development of the texture under continuous annealing conditions (very rapid heating, short annealing time, and high annealing temperatures of intercritical range) has been investigated. The orientation distribution function method has been applied to study the detailed effect of the parameters and the underlying mechanisms. It is found that the important {111} recrystallisation components are strengthened on further annealing at higher subcritical or at intercritical temperatures. This is a result of the successive or simultaneous occurrence of oriented grain growth and partial α → γ → α orientation selective transformation. After complete austenitisation, the strong {111} fibre is weakened, which can be attributed to the operation of several crystallographic variants during the course of phase transformations. The transformation textures are calculated according to Bain (B) and Kurdjumov;amp;#x2013;Sachs (KS) and it is shown that the experimental transformation textures can be predicted by the B mechanism without variant selection or by the KS mechanism with variant selection.
MST/838
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