High strength strapping steel with tensile strength over 1,100 MPa and manufacturing method thereof

Abstract

The invention discloses high strength strapping steel with tensile strength over 1,100 MPa and a manufacturing method thereof. The high strength strapping steel comprises the following components in percentage by weight: 0.25 to 0.35 percent of C, 1.0 to 2.0 percent of Mn, less than or equal to 0.45 percent of Si, less than or equal to 0.04 percent of S, less than or equal to 0.04 percent of P, and the balance of Fe and inevitable impurities. The manufacturing method comprises a steel smelting process, hot rolling process, cold rolling process and ferrite-austenite two-phase region quick quenching and annealing heat treatment process for smelting pure steel while controlling the state of impurities. The method can realize the excellent combination of strength and plasticity, realizes the clean production of the high-strength strapping steel which has a tensile strength over 1,100MPa and an elongation over 10 percent, and has the advantages of easy-to-implement production operation, high production efficiency, low production cost, light environmental pollution. Thus, the method has a good application prospect.

Description

technical field [0001] The invention relates to a strapping steel and a manufacturing method thereof, in particular to a high-strength strapping steel with a tensile strength higher than 1100MPa and a manufacturing method thereof. Background technique [0002] Strapping steel is a thin strip steel product to ensure the safe loading, unloading and transportation of goods. It is mainly used to pack goods such as steel, non-ferrous metals, light textile products, building materials, paper rolls (boards) and wool. Strapping steel requires high tensile strength and certain elongation, so it has the advantages of high strength, good ductility, firm binding and not easy to loose during transportation and loading and unloading. In addition, due to the long-term work in the outdoor environment, the strapping steel is required to have certain corrosion resistance. In strapping steel, high-strength strapping steel is mainly used for packaging and bundling of steel products (hot-rolled...

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Problems solved by technology

[0013] The purpose of the present invention is to provide a high-strength strapping steel with a tensile strength higher than 1100 MPa and a manufacturing method thereof through reasonable compositional design and process design, so as to solve the problem of low strength of the strapping steel in the prior art, The production process has the problems of large environmental pollution, low production efficiency and high cost, so as to realize the production of high-strength strapping steel with a tensile strength of more than 1100MPa and an elongation of more than 10%

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