A high-performance steel bar

Abstract

The invention relates to a high-performance reinforcing steel bar and a preparation method thereof. A processing technology comprises the following steps: (1) high-carbon steel wires (steel wire rods) are produced to steel wires with diameters of 1+ / -0.1 mm through such procedures as acid washing, phosphorization, drawing, annealing, redrawing and reannealing; (2) after the surface treatment is performed for the steel wires, coppers are electroplated on the steel wires, and the cold drawing is performed for the steel wires to produce high-strength fine steel wires of 0.2-0.25 mm; and (3) 5-9 copper-plated fine steel wires are twisted in one direction to form one-layer spiral braided wires; and the multiple braided wires are twisted in two directions to form a multilayer braided high-performance reinforcing steel bar. The high-performance reinforcing steel bar has higher tensile strength; the bonding performance of the uneven surface with concrete is excellent; and the copper-plated surface is corrosion resistant, which guarantees the long service life of the reinforcing steel bar.

Description

technical field [0001] The invention relates to a high-performance steel bar and a preparation method thereof, belonging to civil structural engineering materials in the technical field of building materials, and more particularly relates to a high-performance steel bar capable of firm bonding with concrete materials, corrosion resistance, and high tensile strength. Background technique [0002] At present, my country is in the historical stage of rapid urbanization development, and the level of urbanization continues to increase. The demand for construction steel is relatively large, and the proportion of construction steel accounts for about 50% of the total steel consumption. With the continuous development of housing construction, the consumption of rebar has also increased significantly, accounting for 40-50% of the steel used in construction. [0003] The improvement of the quality requirements of construction projects puts higher and higher requirements on the yield s...

AI Technical Summary

Problems solved by technology

[0004] Patent CN 101988172B discloses a high-strength earthquake-resistant steel bar and its manufacturing method. The yield strength of the steel bar is 500-1200 MPa, which is not high enough; CN 100558479C discloses a prestressed aluminum-clad steel strand. Poor tensile performance; CN 101403119B discloses the process of producing high-strength steel strands with 77MNA steel, using galvanized anti-corrosion, but under acidic conditions, chemical reactions will occur to generate gas, which is unfavorable to concrete strength; CN 201330471Y discloses high-strength low-strength Relax the prestressed steel strand, in order to solve the problem of low bonding force with concrete, a maximum depth of 0.1mm is set on the steel wire, the drop is small and the steel bar itself is damaged

The above-mentioned patents on steel strands are all unidirectional twisting, and the structure is poor in compactness

The above patents generally adopt the method of pickling rust removal + alkaline degreasing for the electroplating pretreatment of steel wire, which is cumbersome and pollutes a lot.

[0005] These weaknesses of the current steel bars limit the higher requirements and faster development of modern high-performance concrete in civil engineering buildings

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