MANUFACTURING METHOD OF SEISMIC-RESISTANT STEEL DEFOREMED BAR HAVING YIELD STRENGTH OF 620MPA GRADE OR MORE AND SEISMIC-RESISTANT STEEL DEFOREMED BAR HAVING YIELD STRENGTH OF 620MPA GRADE OR MORE USING THE SAME

摘要

The present invention relates to a method of manufacturing a seismic reinforcing bar with a yield strength of 620 MPa or higher, and to a seismic reinforcing bar with a yield strength of 620 MPa or higher produced by the manufacturing method. Produces seismic reinforcing bars with improved seismic performance by satisfying the yield ratio (YR; Yield Ratio) required by the company, and achieves a yield strength of 620 MPa or more by controlling the composition ratio of Mo (molybdenum) without adding expensive V (vanadium). At the same time, it satisfies the yield ratio (YR) required by KS to secure economic efficiency and reduce the production cost of seismic reinforcing bars.