Steel wire rod for 1860MPa-level bridge cable galvanized steel wire and manufacturing method thereof

Abstract

The invention relates to a steel wire rod for an 1860MPa-level bridge cable galvanized steel wire and a manufacturing method of the steel wire rod. The steel wire rod for the 1860MPa-level bridge cable galvanized steel wire comprises the following raw materials by weight percent: 0.81-0.90% of C, 0.70-1.60% of Si, 0.60-0.90% of Mn, 0.02-1.20% of Ni, 0.00-0.25% of W, 0.015-0.030 of Al, 0.00-0.70% of Cr, 0.00-0.15% of V, 0.002-0.006% of Ca, less than or equal to 0.015% of P, less than or equal to 0.015% of S and the balance of Fe and inevitable impurities, wherein the total quantity of the impurity elements is lower than 0.05%. For the steel wire rod and the preparation method of the steel wire rod, the steel wire rod is not required for salt bath processing, and can be produced by adopting conventional drawing technique, the finished steel wire after being drawn and galvanized has the strength higher than 1860MPa, has 14 times of torsion values, and can be applicable to the need for construction of extra big span bridge.

Description

technical field [0001] The invention relates to the production technology of high-carbon steel wire rods, in particular to a wire rod for galvanized steel wires of 1860MPa bridge cables and a manufacturing method thereof. At the same time, it has good strength and toughness, and can be used to produce long-span bridge cables. Background technique [0002] Suspension bridges and cable-stayed bridges are currently the preferred form of long-span bridge design across bays, canyons, and large rivers. A suspension bridge refers to a bridge in which the main load-bearing member of the upper structure is a bridge suspended by cables and anchored to both banks (or both ends of the bridge). Many suspenders hang from the cables to hang the bridge deck. Cable-stayed bridges are composed of cables, cable towers, main girders and bridge decks. The load on the bridge deck is transmitted to the cables through the main girders, and then to the cable towers by the cables. [0003] With the...

AI Technical Summary

Problems solved by technology

[0010] However, the above-mentioned schemes all have relatively large deficiencies, mainly as follows: the salt bath treatment process will cause great harm to the environment and the health of workers, and the investment in equipment is too large

Using two drawing processes for wire rods and conducting intermediate lead bath heat treatment will increase the difficulty and time of steel wire production, resulting in increased energy consumption and cost, and there is also the problem of lead pollution

Controlling the P element content in the alloy to less than 0.01% will greatly increase the difficulty of steelmaking, reduce the yield and increase the cost of materials

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