Hot-rolled steel strip for high-strength and high-corrosion-resistance anchor rod body and preparation method and application of hot-rolled steel strip

Abstract

The invention provides a hot rolled steel strip for a high-strength and high-corrosion-resistance anchor rod body and a preparation method and application of the hot rolled steel strip. The hot rolled steel strip is prepared from the following elements in percentage by weight: 0.18 to 0.24 percent of C, 0.20 to 0.30 percent of Si, 0.80 to 1.20 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.007 percent of S, less than or equal to 0.0040 percent of N, 1.40 to 1.55 percent of Cr, 0.25 to 0.35 percent of Cu, 0.02 to 0.05 percent of Ti, 0.04 to 0.08 percent of Sb, 0.1 to 0.13 percent of Als, 1.25 to 1.35 percent of Ni and the balance of Fe and impurities. Als and N are combined, so that the grain size inhibition effect can be exerted to the maximum extent, and austenite grains are refined; cr, Als and Sb are beneficial to formation of a compact protective rust layer on the steel surface, invasion of Cl <-> in the marine environment is inhibited, and the corrosion rate is reduced.

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