Hot Ductility Improvement in the Peritectic steel containing Vanadium by application of high Temperature Deformation

摘要

Peritectic steels, during solidification, develop coarse, as cast grain and large columnar grains that boundary separation. This is attributed to the large grain boundary crack during ratio and higher density of microalloying As a consequence, the hot ductility of steel is very low and the slab cracks the unbending of the continuous process. In this work, the hot ductility behavior of a peritectic steel was studied. Tensile specimens were and solidified in- situ and the hot ductility trough was quantified at temperatures from 700 to 1100 deg C. The hot ductility trough was plotted under two conditions, with and without pre-deformation in during cooling the very high temperature region of single that is 1400-1300 deg C. It was noticed that such pre-deformation improved the hot ductility significantly. The of improvement in the hot ductility varied with the unbending higher than 800 deg C. By contrast, no contrast, The effect of pre-deformation was observed at unbending 800 deg C and lower. The effect of the pre-deformation on fracture surface as well as microstractural characteristics is discussed in this paper.