METHOD OF MANUFACTURE OF CAST IRON TUBES

摘要

FIELD: metallurgy; deformation thermal treatment of iron-carbon alloys; manufacture of hot-deformed seamless tubes. ^ SUBSTANCE: proposed method includes preliminary heat treatment of high-strength cast-iron billet at temperature Ac3+200°C continued for 10 h and followed by heating the billet at deformation temperature, deformation of billet and heat treatment of tube. ^ EFFECT: improved quality of tubes; extended field of application of this method. ^ 4 cl, 2 ex