METHOD OF PRODUCTION OF REINFORCEMENT DIE-ROLLED SECTIONS Russian patent published in 2004 - IPC

FIELD: metallurgy; production of reinforcement die-rolled sections in continuous and wire and section mills. SUBSTANCE: proposed method includes heating the blank and rolling it to required size, inter-deformation cooling of work-piece and after-deformation cooling of finished section to temperature found from the following expression: , where t₀ is temperature of after-deformation cooling, C; t_n is temperature of inter= deformation cooling, C; σ_y.p. is minimum permissible magnitude of yield point, Mpa; σ_ul.st. is minimum permissible magnitude of ultimate strength, Mpa; δ₅ is minimum permissible magnitude of relative elongation, %; C_eg is carbon equivalent determined by the following formula: C_eg= C+Mn/6+Si/7, where C, Mn and Si is contents of carbon, manganese and silicon. EFFECT: enhanced strength and ductility of die-rolled sections. 2 tbl, 1 ex