Special Features of the Granular Structure of the Surface Zone in Pipe Steel 12kh18n12t

The structure of 12Kh18N12T austenitic pipe steel has been studied by scanning and electron microscopy. It has been shown that the lubricant remaining on the internal surface of a pipe after rolling causes an increase in the carbon content in the near-surface layer under subsequent annealings. Carbide particles are formed in the structure near the internal surface, and considerable grain refining is observed.