High-strength nanometer reinforced steel capable of inhibiting marine organism fouling and preparation method thereof

Abstract

The invention belongs to the field of high-strength steel materials, and particularly relates to a high-strength nanometer reinforced steel capable of inhibiting marine organism fouling and a preparation method thereof. The steel comprises the following chemical components of, by weight, 0.03%-0.06% of C, less than or equal to 0.5% of Si, 0.7%-1.2% of Mn, 1.0%-3.0% of Cu, 2.0%-4.0% of Ni, 0.5%-1.5% of Al, 0.5%-1.0% of Cr, 0.2%-0.4% of Mo, 0.04%-0.06% of Nb, 0.03%-0.06% of V, 0.01%-0.03% of Ti, 0.001%-0.01% of N, less than or equal to 0.0050% of S, less than or equal to 0.0050% of P and the balance Fe. According to the steel, through a nano precipitation phase synergistic reinforcement technology and a grading aging heat treatment process, high-strength and high-plasticity mechanical property in which the yield strength is not lower than 1200 MPa, the tensile strength is not lower than 1300 MPa and the elongation percentage is not lower than 15% is achieved; meanwhile, the steel also has the unique performance for inhibiting marine organism fouling, so that the dual purposes of excellent mechanical property and the organism fouling inhibition performance are achieved, and the steelcan be applied to the important fields, such as naval construction, marine platforms and bridge construction, facing marine organism fouling environments.

Description

technical field [0001] The invention belongs to the field of high-strength steel materials, in particular to a high-strength nano-reinforced steel capable of inhibiting marine biofouling and a preparation method thereof. Background technique [0002] The marine environment is harsh, and materials are severely corroded. Among them, the corrosion caused by marine microorganisms and biofouling accounts for about 70-80% of the corrosion of marine materials, and the annual loss caused by this type of corrosion is as high as hundreds of billions of dollars. Microbial corrosion and biofouling of marine materials have become one of the technical bottlenecks that seriously restrict the development of marine engineering technology and equipment. Microbial corrosion and biofouling of materials in seawater have been recognized worldwide. Major developed countries in the world have set up national strategic projects to support research in this field, but the international community has ...

AI Technical Summary

Problems solved by technology

Since the Cu-rich phase cannot effectively "contact" with microorganisms, its potential marine fouling resistance is seriously restricted.

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