The invention provides a 630MPa high-strength
seismic resistance index
rebar and a production method of the 630MPa high-strength
seismic resistance index
rebar. The production method comprises the steps that
steelmaking raw materials are processed through a converter, so that rough
molten steel is obtained; the refining operation is conducted through a refining furnace, so that refined
molten steel is obtained; the rolling operation is conducted through a
continuous casting machine, so that a
continuous casting steel billet is obtained; after the
continuous casting steel billet is conveyed toa
heating furnace and heated, the steel billet enters a rough rolling unit of a
machine frame and is subjected to the rough rolling operation, so that a rough rolled steel billet is obtained; after the rough rolled steel billet is
cut and broken, the steel billet enters an intermediate rolling unit of the
machine frame and is subjected to the intermediate rolling operation; after the steel billetis processed in a pre-water-cooling section, and the low-temperature finish rolling operation is accomplished, the steel billet is
cut and broken, enters a finish rolling unit of the machine frame andis subjected to the finish rolling operation; and after a finish rolled steel billet is cooled and
cut, the steel billet is subjected to the finishing operation and is stored. The technical problemsthat the adopted production technology is difficult to meet the 630MPa-strength
seismic resistance requirement, and the production cost is high are solved. The technical effects that chemical components and the rolling technology are adjusted on the basis of an ordinary
rebar, various index requirements of a high-performance rebar are met, the industrial rolling technology is stable, the cost is reduced, and the benefit is improved are achieved.