Method for preparing phi7.0mm1770MPa high-strength low-relaxation zinc-coated wire

Abstract

The Phi 7.0mm1770MPa zinc plated steel wire is made through coiling inspection, surface preparation, wiredrawing, hot galvanizing, stable treatment and inspection. It adds a radius limit mold for steel wire surface friction, smoothening, limiting of the wire diameter, preventing the wire deformation, proceeding low temperature tempering and surface smoothening treatment, with the generation of zinc plated steel wire having high strength, low looseness, higher flexible and ductility and high torque feature, effectively getting over the difficulty of current technology being unable to cover the high strength low looseness, producing wire conforming to technical index.

Description

technical field [0001] The invention relates to the technical field of φ7.0mm1770MPa steel wire forming, in particular to a manufacturing method of high-strength and low-relaxation galvanized steel wire. Background technique [0002] In order to realize the ultra-large span of the bridge, to meet the construction requirements of highways, long-span suspension bridges, and cable-stayed suspension bridges, as well as the absolute reliability and high safety requirements, high-strength, low-slack, twisted galvanized steel wire has become the key material for manufacturing cables , for the galvanized steel wire of the stay cable used in the construction of the bridge, in addition to the requirements of high strength and low relaxation, there are also requirements to meet the requirements of high torsional performance and good linearity. In the past, the galvanized steel wire used for the stay cable only had the requirement of low relaxation and no requirement of torsion index. ...

AI Technical Summary

Problems solved by technology

Under normal circumstances, these two processes have their own characteristics but are difficult to be compatible. In the "die-drawing" process, the deformation of the steel wire must be more than 10% to obtain sufficient tension. The advantages are simple equipment and relatively good product surface quality. The disadvantages are: The toughness and plasticity are poor; the equipment in the "double tensioning" process is relatively complex, and the product has good toughness and plasticity, but the surface quality is poor, which often cannot meet user requirements