Ultrahigh-strength reinforcing rib and manufacturing method thereof

Abstract

The invention provides an ultra-high-strength reinforcing rib and a manufacturing method thereof. In an exemplary embodiment, the ultra-high strength stiffener contains 0.10 wt% to 0.45 wt% of carbon (C), 0.5 wt% to 1.0 wt% of silicon (Si), 0.40 wt% to 1.80 wt% of manganese (Mn), 0.10 wt% to 1.0 wt% of chromium (Cr), greater than 0 wt% and less than or equal to 0.2 wt% of vanadium (V), greater than 0 wt% and less than or equal to 0.4 wt% of copper (Cu), greater than 0 wt% and less than or equal to 0.5 wt% of molybdenum (Mo), 0.015 wt% to 0.070 wt% of aluminum (Al), and the balance being Fe and unavoidable impurities. More than 0 and less than or equal to 0.25 wt% of nickel (Ni), more than 0 and less than or equal to 0.1 wt% of tin (Sn), more than 0 and less than or equal to 0.05 wt% of phosphorus (P), more than 0 and less than or equal to 0.03 wt% of sulfur (S), 0.005 to 0.02 wt% of nitrogen (N), the remainder being iron (Fe) and other unavoidable impurities.

Description

technical field [0001] The invention relates to an ultra-high-strength reinforcing rib and a manufacturing method thereof. More particularly, the present invention relates to an ultra-high-strength reinforcing bar for building structures having excellent earthquake resistance and a method of manufacturing the same. Background technique [0002] Recently, structures installed to increase space utilization have become larger. Therefore, ribs with greater strength are required. Ribs with a yield strength of 500 MPa were required in the past, but recently, ribs with a yield strength of 600 MPa to 700 MPa are required, and it is expected that ribs with a yield strength of 1.0 GPa or more will be required in the future. [0003] Also, for natural or man-made disasters such as earthquakes, fires, strong winds, snowstorms, land subsidence, and sinkholes that have recently occurred in Korea and other countries, ensuring the stability of building structures is crucial to ensuring th...

AI Technical Summary

Problems solved by technology

In order to impart earthquake resistance, it is necessary to increase plastic deformation ability by adding various alloying elements such as carbon (C), manganese (Mn), vanadium (V), and niobium (Nb), but there is a problem that excessive addition of iron alloys leads to increased production costs

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