Influence of structural and textural states of low-carbon steels on the cracking resistance of tube products

The texture of low-carbon low-alloy pipe steel sheet with bainitic structure produced by thermomechanical controlled processing (TMCP) is studied by means of electron backscatter diffraction (EBSD). The formation of cleavages during steel failure is related to the presence of ferrite grains with orientation {001} extended in the hot rolling direction. Two possibilities are shown for the formation of regions of easy crack propagation along the product obtained by TMCP.