(in lingua inglese)
No significant variation in microstructure was observed between fully processed CRNO samples with and without coil breaks. Higher nitrogen level in excess of 60 ppm led to an increase in susceptibility to coil breaks. To minimize the effect of nitrogen, Ti microalloyed CRNO heats were made and processed. The Ti-microalloyed coils exhibited similar diversion on account of coil breaks as the plain CRNO steels indicating the genesis of the problem lies elsewhere.