Steel cord structure with giant high strength as well as preparation method thereof

Abstract

The invention discloses a steel cord structure with giant high strength. The carbon content of a steel cord is 0.95 to 1.10 percent; the steel cord adopts a 2*1 structure; during twisting, intermittent bending deformation is not performed on a steel wire, the lay length range of the steel cord is 10 to 22 mm, 100 percent glue permeation is realized, and the diameter range of a wet pull steel wireis 0.25 to 0.45 mm. The invention further discloses a preparation method of the steel cord structure. The steel cord structure with giant high strength has the following advantages: a 2*1 open structure is adopted, 100 percent glue permeation is guaranteed, the strength is high, intermittent bending predeformation of the steel wire is not needed, the strength twisting loss is reduced, the structure is simple, most of complex structure steel cords of 3*1, 4*1, 5*1, 2+3, 3+2 and the like can be replaced by adjusting the diameter and the strength of the steel wire, tyre lightweighting is realized, and the production cost of the steel cord is reduced.

Description

technical field [0001] The invention relates to the field of steel cord production, in particular to an extremely high-strength steel cord structure and a preparation method thereof. Background technique [0002] Steel cord is mainly used in the belt layer of PCR tires. At present, the strength of PCR steel cord is mainly HT, and there are also some ST. The structure is mainly 2x1, 3x1, 2+2, 4x1, 5x1, 2+3, 3+ 2 structure. The existing steel cords mainly have the following problems: [0003] 1. The commonly used steel cords cannot meet the lightweight requirements of tires due to their relatively low strength. [0004] 2. The existing 2x1HT / ST structure, such as the commonly used 2x0.30HT and 3x0.30ST, cannot replace other structures such as 3x1, 2+2, 4x1, 5x1, 2+3, 3+2 due to strength problems, resulting in The existing PCR steel cords have various and complex structures. [0005] 3. For the existing 3x1, 4x1, and 5x1 structures, in order to ensure glue penetration, it i...

AI Technical Summary

Problems solved by technology

[0003] 1. The commonly used steel cords cannot meet the lightweight requirements of tires due to their relatively low strength.

[0004] 2. The existing 2x1HT / ST structure, such as the commonly used 2x0.30HT and 3x0.30ST, cannot replace other structures such as 3x1, 2+2, 4x1, 5x1, 2+3, 3+2 due to strength problems, resulting in The existing PCR steel cord structure is various and complex

This is not a big problem for NT / HT / ST strength, but for higher strength steel wire, the deformation will damage the steel wire and cause a large strength loss, so that the cord strength cannot reach the desired level

[0006] 4. In the existing 2+2, 2+3, 3+2 and other structures, due to the twisting process, some steel wires undergo S / Z alternate twisting, not only the broken wires are high when twisting the rope, but also the single wire in the cord There is a large difference in the residual torsion of the steel wires, resulting in problems such as poor straightness of the cord and easy loosening

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