TECHNOLOGY OF PRODUCING COLD DEFORMABLE WIRE FROM HADFIELD STEEL
Purpose. Development of an improved technology for the production of small cross-section wire from high-strength austenitic steel using hot and cold deformation and heat treatment. Methodology . Structural studies of Hadfield steel 110G13L were carried out by light metallography. Hot deformation of the cast billet was carried out by forging on a hammer of type MA 4134 and hot rolling on a single-strand two-roll mill at a temperature of 1 000….1 030 0С. Heat treatment was performed in a drawing mill stream with heating in the inductor to the temperatures of recrystallization annealing and subsequent quenching. Results . An analysis of experimental studies showed the fundamental possibility of producing cold-deformed wire from Hadfield steel with a diameter of 2...5 mm, which can be used in automatic machines for welding and surfacing. Originality . A mode has been developed that includes heating, a combination of deformation operations, as well as regulated heating and water cooling according to the principle of vacancy hardening, which together gives the effect of a fine-grained structure, significantly reducing the intensity of strain hardening of thin wires from high-strength austenitic steel. Practical value . The developed technological scheme significantly reduces the production cycle, reduces the cycle time and provides significant resource savings.