METHOD FOR PRODUCING STEEL MATERIAL, APPARATUS FOR COOLING STEEL MATERIAL, AND STEEL MATERIAL

摘要

In the present invention, when a cooling apparatus (2) having a plurality of cooling sections (head section-cooling headers (21a) to (21c), and a foot section-cooling header (22)) disposed side by side in the longitudinal direction of the steel material cools a steel material hot worked or cooled/reheated, the steel material is conveyed at the conveyance distance L_o (m) satisfying Equation (1), in the longitudinal direction of the steel material, in the cooling apparatus (2). In Equation (1), L_o represents the conveyance distance (m) of the steel material, m represents a natural number, and L_h represents the length (m) of the cooling sections in the longitudinal direction of the steel material. $\left(\mathrm{m}-0.20\right)\times {\mathrm{L}}_{\mathrm{h}}\le {\mathrm{L}}_{\mathrm{o}}\le \left(\mathrm{m}+0.20\right)\times {\mathrm{L}}_{\mathrm{h}}\mathop{\mathrm{image}}$