HRB500E Fine Grain Hot Rolled Seismic Steel Bar Production Process and Variety Development
In this paper,according to the process and equipment conditions of the existing new bar production line of Fushun New Iron and Steel Company,vanadium and nitrogen alloy reinforcement mechanism is adopted,and the controlled rolling and cooling process are fully utilized to realize the fine grain reinforcement and precipitation reinforcement of hot-rolled seismic reinforcement bars.By reasonably regulating the amount of deformation,deformation temperature,deformation speed and cooling speed of the passes,HRB500E fine-grained hot-rolled seismic reinforcement bars with specifications of Φ20～Φ32 mm,strength/flexure ratios ≥1.25,and grain size of the rolled tissue not coarser than grade 9 have been successfully developed.The industrialized production process of HRB500E fine grain steel bars of different specifications has been determined,which effectively reduces the amount of alloying elements added,greatly reduces the production cost,and has good economic and social benefits.
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