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A kind of extremely high-strength steel cord structure and its preparation method

A steel cord and high-strength technology, which is applied in the field of extremely high-strength steel cord structure and its preparation, can solve the problems of damaged steel wire strength loss, easy loosening, and large difference in torsion of a single steel wire, etc., to reduce the strength twist Control losses, reduce production costs, and have a wide range of applications

Active Publication Date: 2021-11-23
ZHENJIANG NAISI ADVANCE MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • A kind of extremely high-strength steel cord structure and its preparation method
  • A kind of extremely high-strength steel cord structure and its preparation method
  • A kind of extremely high-strength steel cord structure and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An extremely high-strength steel cord structure with a carbon content of 0.95%. Such as Figure 1-2 As shown, the steel cord has a 2x1 structure, and no intermittent bending deformation is applied to the steel wire during twisting, ensuring 100% glue penetration.

[0027] The strength of wet-drawn steel wire of steel cord=4800-2200*Φmpa, when the diameter of wet-drawn steel wire is 0.25mm, the strength of wet-drawn steel wire is 4250mpa, and the tolerance of ±100mpa is allowed in production. The target value of the breaking force of the steel cord = 0.95* (the sum of the breaking force of the two steel wires) = 0.95 * (2* the strength of the steel cord * the cross-sectional area) = 397.4N, the actual minimum value of the breaking force is 387N, the steel curtain The lay length of the thread was 10 mm.

[0028] The preparation method of the huge high-strength steel cord structure specifically includes the following steps:

[0029] Step 1. Use a high-carbon microalloy ...

Embodiment 2

[0035] An extremely high-strength steel cord structure with a carbon content of 1.02%. Such as Figure 1-2 As shown, the steel cord has a 2x1 structure, and no intermittent bending deformation is applied to the steel wire during twisting, ensuring 100% glue penetration.

[0036] The strength of wet-drawn steel wire of steel cord=4800-2200*Φmpa, when the diameter of wet-drawn steel wire is 0.33mm, the strength of wet-drawn steel wire is 4074mpa, and the tolerance of ±100mpa is allowed in production. The target value of the breaking force of the steel cord = 0.95* (the sum of the breaking force of the two steel wires) = 0.95 * (2* the strength of the steel cord * the cross-sectional area) = 662N, the actual minimum value of the breaking force is 648N, the steel cord The twist length is 18mm.

[0037] The preparation method of the huge high-strength steel cord structure specifically includes the following steps:

[0038] Step 1. Use a high-carbon microalloy wire rod with a dia...

Embodiment 3

[0044] An extremely high-strength steel cord structure with a carbon content of 1.10%. Such as Figure 1-2 As shown, the steel cord has a 2x1 structure, and no intermittent bending deformation is applied to the steel wire during twisting, ensuring 100% glue penetration.

[0045] The strength of wet-drawn steel wire of steel cord=4800-2200*Φmpa, when the diameter of wet-drawn steel wire is 0.45mm, the strength of wet-drawn steel wire is 3810mpa, and the tolerance of ±100mpa is allowed in production. The target value of the breaking force of the steel cord=0.95*(the sum of the breaking force of the two steel wires)=0.95*(2*the strength of the steel cord*the cross-sectional area)=1151N, the actual minimum value of the breaking force is 1121N, the steel cord The twist length is 22mm.

[0046] The preparation method of the huge high-strength steel cord structure specifically includes the following steps:

[0047] Step 1. Use a high-carbon microalloy wire rod with a diameter of Φ...

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Abstract

The invention discloses a super high-strength steel cord structure, the carbon content of the steel cord is 0.95% to 1.10%, the steel cord has a 2×1 structure, and no intermittent bending is applied to the steel wire during twisting Deformation, the steel cord has a twist pitch range of 10-22 mm, 100% glue penetration, and a wet-drawn steel wire diameter range of 0.25-0.45 mm. The invention also discloses a preparation method thereof. The advantages of the invention are that it adopts 2x1 open structure, ensures 100% glue penetration, high strength, does not need to perform intermittent bending and pre-deformation on the steel wire, reduces the loss of strength and twisting, and has a simple structure. By adjusting the diameter and strength of the steel wire, it can replace the Most of the complex structural steel cords such as 3x1, 4x1, 5x1, 2+3, 3+2, etc., not only realize the lightweight of tires, but also reduce the production cost of steel cords.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D07B1/06C22C9/04C22C38/02C22C38/04C22C38/18
CPCC22C9/04C22C38/002C22C38/02C22C38/04C22C38/18D07B1/062D07B1/066D07B2201/2011D07B2205/30D07B2205/3021D07B2205/3057D07B2205/3064D07B2205/3067D07B2205/3071D07B2401/2055D07B2501/2046D07B2801/18D07B2801/10
Inventor 盛荣生张明
Owner ZHENJIANG NAISI ADVANCE MATERIALS