Economical high-strength binding strip steel with tensile strength more than or equal to 1,000 MPa, and manufacturing method thereof

Abstract

The invention discloses economical high-strength binding strip steel with tensile strength more than or equal to 1,000 MPa, and a manufacturing method thereof. The steel comprises the following components in percentage by weight: 0.25 to 0.42 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, less than or equal to 0.08 percent of Al, and the balance of Fe and inevitable impurities. The manufacturing method comprises a steelmaking process for clean steel smelting controlled in inclusion forms, a hot rolling process, a cold rolling process and a bluing-annealing process. The manufacturing method can realize the clean production of high-strength binding strip steel, reduces production processes, improves the production efficiency, and can obtain the economical high-strength binding strip steel with well matched strength and plasticity and the tensile strength more than or equal to 1,000 MPa while significantly reducing production cost.

Description

technical field [0001] The invention relates to a strapping steel and a manufacturing method thereof, in particular to a design and manufacturing method of an economical high-strength strapping steel with a tensile strength ≥ 1000 MPa. 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. [0003] Among the strapping steels, there is a great demand for high-strength strapping steels mainly used for pack...

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Problems solved by technology

[0012] The purpose of the present invention is to provide an economical high-strength strapping steel with a tensile strength ≥ 1000 MPa and its manufacturing method through reasonable composition design and process design, so as to solve the problems of serious environmental pollution and low production efficiency in the prior art And the problem of high cost, and achieve a good match between the strength and plasticity of the finished product by generating recovered ferrite + granular pearlite structure

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