A kind of wire rod for high-strength Ni-cr corrosion-resistant steel strand and production method thereof

Abstract

The invention provides a high-strength Ni-Cr corrosion-resistant wire rod for a steel stranded wire and a production method thereof. The wire rod is made from the following components in percent by weight: 0.80%-0.85% of C, 0.15%-0.35% of Si, 0.60%-0.90% of Mn, less than or equal to 0.025% of P, less than or equal to 0.015% of S, 0.20%-0.30% of Cr, 0.20%-0.30% of Ni and the balance of Fe and inevitable impurity elements. The production method comprises the following steps: pretreating molten iron, smelting in a converter, refining in an LF (Ladle Furnace), continuously casting a square blank, continuously rolling the square blank, clearing a steel blank, heating, rolling, carrying out controlled cooling, finishing, inspecting and warehousing. The wire rod and the production method provided by the invention have the advantages that the wire rod contains Cr and Ni elements, so that the strength, the plasticity and corrosion resistance of the wire rod are improved; and by virtue of a steel-making and rolling control process, the wire rod with excellent mechanical property, drawing-forming property, corrosion resistance and the like is obtained.

Description

technical field [0001] The invention belongs to the field of metal materials, in particular to a wire rod for high-strength corrosion-resistant steel strands and a production method thereof. Background technique [0002] In the bridge construction of high-speed railways and highways, prestressed beams have been widely used due to their light weight, large span, comfortable driving, saving steel and concrete, and good durability. However, due to non-refined construction factors such as equipment, personnel, and material technology, a series of durability failure accidents of prestressed concrete structures have occurred in recent decades, among which the damage caused by corrosion of prestressed steel strands accounts for the vast majority. Serious consequences have been caused, which has attracted the attention of scholars and engineering circles all over the world. [0003] The corrosion of prestressed steel strands directly affects the service time of bridges and other pr...

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