High-strength steel strand and production process thereof

Abstract

The invention relates to the technical field of steel strands, and provides a high-strength steel strand and a production process thereof. A high-strength steel strand sequentially comprises a bare strand and a resin coating from inside to outside, the resin coating comprises, by weight, 100 parts of epoxy resin, 5-10 parts of modifier modified aluminum oxide, 8-12 parts of a curing agent, 3-8 parts of a curing accelerator and 10-20 parts of a diluent, and a modifier of the modifier modified aluminum oxide is tetrasodium iminodisuccinate and / or 3, 4, 5-trimethyl-1, 3-pentanediol. And 3, 5-tricarboxylic acid aniline. According to the technical scheme, the problem of low strength of the steel strand in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel strands, and in particular to a high-strength steel strand and a production process thereof. Background Art

[0002] Steel strand is a steel product consisting of multiple strands of steel wires, which has the characteristics of good toughness, corrosion resistance, low relaxation, etc. It is widely used in construction engineering, railway engineering, highway engineering and other fields, and can be used for prestressed concrete components, track slabs, highway guardrails, cableways, etc. However, due to the special use environment of steel strand, the strength of steel strand needs to be further improved. Summary of the invention

[0003] The present invention provides a high-strength steel strand and a production process thereof, which solves the problem of low strength of the steel strand in the related art.

[0004] The technical solution of the present invention is as follows: The present invention provides a high-strength steel strand, which comprises a bare strand and a resin coating in order from the inside out. The raw materials of the resin coating comprise the following components in parts by weight: 100 parts of epoxy resin, 5-10 parts of modifier-modified alumina, 8-12 parts of curing agent, 3-8 parts of curing accelerator, and 10-20 parts of diluent. The modifier of the modifier-modified alumina is tetrasodium iminodisuccinate and / or 3,4,5-tricarboxylic acid aniline.

[0005] As a further technical solution, the raw material of the modifier-modified alumina includes the modifier and alumina in a mass ratio of 0.01 to 0.2:10.

[0006] As a further technical solution, the raw material of the modifier-modified alumina includes the modifier and alumina in a mass ratio of 0.05 to 0.1:10.

[0007] The raw materials of aluminum oxide modified by the modifier in the present invention include the modifier and aluminum oxide in a mass ratio of 0.05-0.1:10, thereby further enhancing the strength of the steel strand.

[0008] As a further technical solution, the modifier for modifying the alumina comprises tetrasodium iminodisuccinate and 3,4,5-tricarboxylic acid aniline in a mass ratio of 1:9 to 9:1.

[0009] The present invention further enhances the strength of the steel strand by compounding tetrasodium iminodisuccinate and 3,4,5-tricarboxylic acid aniline in a mass ratio of 1:9 to 9:1.

[0010] As a further technical solution, the mass of the tetrasodium iminodisuccinate is ≤ the mass of 3,4,5-tricarboxylic acid aniline.

[0011] The invention further enhances the strength of the steel strand by limiting the mass of tetrasodium iminodisuccinate to be less than or equal to the mass of 3,4,5-tricarboxylic acid aniline.

[0012] As a further technical solution, the mass ratio of the tetrasodium iminodisuccinate to 3,4,5-tricarboxylic acid aniline is 1:3-4.

[0013] The invention further enhances the strength of the steel strand by limiting the mass ratio of tetrasodium iminodisuccinate to 3,4,5-tricarboxylic acid aniline to 1:3-4.

[0014] As a further technical solution, the diluent is an active diluent AGE.

[0015] As a further technical solution, the curing agent is a latent curing agent, and the latent curing agent is one or more of SH-900, SH-500, and SH-300.

[0016] As a further technical solution, the curing agent accelerator is SH-A100.

[0017] As a further technical solution, the preparation method of the modifier-modified alumina comprises the following steps: dissolving the modifier in water, adding alumina and mixing evenly, filtering, and drying to obtain the modifier-modified alumina.

[0018] The invention provides a production process of a high-strength steel strand, comprising the following steps: dipping a bare strand in a resin coating, and curing the coating to obtain the high-strength steel strand.

[0019] The working principle and beneficial effects of the present invention are: In the present invention, the strength of the steel strand is improved by modifying alumina and selecting tetrasodium iminodisuccinate and / or 3,4,5-tricarboxylic acid aniline as a modifier for modifying alumina. The amino groups of tetrasodium iminodisuccinate and / or 3,4,5-tricarboxylic acid aniline are combined with the hydroxyl groups on the surface of alumina through hydrogen bonds, and the carboxyl ends act with the metal on the surface of the bare strand in the form of coordination bonds, thereby enhancing the bonding between the resin coating and the bare strand. At the same time, by adjusting the content of each component of the raw materials in the resin coating, the strength of the resin coating is optimized, thereby improving the strength of the steel strand. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The parameters of the raw materials in the following examples and comparative examples are as follows: The epoxy resin is E51; The particle size of aluminum oxide is: 30nm.

[0022] Example 1 A steel strand and a preparation method thereof, comprising the following steps: S1, dissolving 0.01 parts of tetrasodium iminodisuccinate in 15 parts of water, adding 10 parts of aluminum oxide and mixing evenly, filtering, and drying to obtain a modifier-modified aluminum oxide; S2, 100 parts of epoxy resin and 10 parts of active diluent AGE were mixed and stirred evenly under nitrogen protection, and then 5 parts of modified alumina, 8 parts of SH-900 and 3 parts of SH-A100 were added and stirred evenly, and degassed to obtain a resin coating; S3. Immerse the bare stranded wire in a resin coating and solidify it to obtain a steel stranded wire.

[0023] Example 2 A steel strand and a preparation method thereof, comprising the following steps: S1, dissolving 0.2 parts of tetrasodium iminodisuccinate in 15 parts of water, adding 10 parts of alumina, mixing evenly, filtering, and drying to obtain a modifier-modified alumina; S2, 100 parts of epoxy resin and 20 parts of active diluent AGE were mixed and stirred evenly under nitrogen protection, and then 5 parts of modified alumina, 8 parts of SH-900 and 3 parts of SH-A100 were added and stirred evenly, and degassed to obtain a resin coating; S3. Immerse the bare stranded wire in a resin coating and solidify it to obtain a steel stranded wire.

[0024] Example 3 The only difference from Example 1 is that 0.2 parts of tetrasodium iminodisuccinate is used.

[0025] Example 4 The only difference from Example 1 is that 0.05 parts of tetrasodium iminodisuccinate are used.

[0026] Example 5 The only difference from Example 1 is that 0.1 part of tetrasodium iminodisuccinate is used.

[0027] Example 6 The only difference from Example 5 is that the tetrasodium iminodisuccinate is replaced by an equal amount of 3,4,5-tricarboxylic acid aniline.

[0028] Example 7 A steel strand and a preparation method thereof, comprising the following steps: S1, dissolving 0.01 parts of tetrasodium iminodisuccinate and 0.09 parts of 3,4,5-tricarboxylic acid aniline in 15 parts of water, adding 10 parts of aluminum oxide, mixing evenly, filtering, and drying to obtain a modifier-modified aluminum oxide; S2, 100 parts of epoxy resin and 10 parts of active diluent AGE were mixed and stirred evenly under nitrogen protection, and then 5 parts of modified alumina, 8 parts of SH-900 and 3 parts of SH-A100 were added and stirred evenly, and degassed to obtain a resin coating; S3. Immerse the bare stranded wire in a resin coating and solidify it to obtain a steel stranded wire.

[0029] Example 8 The only difference from Example 7 is: 0.09 parts of tetrasodium iminodisuccinate and 0.01 parts of 3,4,5-tricarboxylic acid aniline.

[0030] Example 9 The only difference from Example 7 is: 0.05 parts of tetrasodium iminodisuccinate and 0.05 parts of 3,4,5-tricarboxylic acid aniline.

[0031] Example 10 The only difference from Example 7 is: 0.025 parts of tetrasodium iminodisuccinate and 0.075 parts of 3,4,5-tricarboxylic acid aniline.

[0032] Embodiment 11 The only difference from Example 7 is: 0.02 parts of tetrasodium iminodisuccinate and 0.08 parts of 3,4,5-tricarboxylic acid aniline.

[0033] Comparative Example 1 S1, 100 parts of epoxy resin and 10 parts of active diluent AGE were mixed and stirred evenly under nitrogen protection, and then 5 parts of modified alumina, 8 parts of SH-900 and 3 parts of SH-A100 were added and stirred evenly, and degassed to obtain a resin coating; S2. Immerse the bare stranded wire in a resin coating and solidify it to obtain a steel stranded wire.

[0034] Test example The resin coatings prepared in Examples 1 to 11 and Comparative Example 1 were coated on the surface of 82MnA steel sheets with a thickness of 0.15 mm. After curing, the adhesion grade was tested according to the cross-scratching method in GB / T 31586.2-2015 standard; The steel strands prepared in Examples 1 to 11 and Comparative Example 1 were subjected to a tensile strength test with reference to the standard of GB / T 228.1-2021, and the average value of the test results of the five specimens was taken as the final result. The results are shown in Table 1.

[0035] Table 1 Test results of the adhesion grade of the resin coating and the tensile strength of the steel strands of Examples 1 to 11 and Comparative Example 1

[0036] Compared with Comparative Example 1, Example 1 and Examples 3 to 11 use a modifier to modify alumina. As a result, the adhesion of the resin coatings prepared in Example 1 and Examples 3 to 11 is better than that in Comparative Example 1, and the tensile strength of the steel strands prepared in Example 1 and Examples 3 to 11 is higher than that in Comparative Example 1, indicating that the adhesion of the resin coating to the bare strands and the strength of the steel strands can be enhanced by using a modifier to modify alumina.

[0037] Compared with Example 1 and Example 3, in the steel strands prepared in Examples 4~5, the raw materials of the modifier-modified alumina include the modifier and alumina in a mass ratio of 0.05~0.1:10. As a result, the tensile strength of Examples 4~5 is higher than that of Examples 1 and Example 3, indicating that the strength of the steel strand is further enhanced by limiting the mass ratio of the raw materials of the modifier-modified alumina to 0.05~0.1:10.

[0038] Compared with Examples 5-6, the steel strands prepared in Examples 7-11 are a compound of tetrasodium iminodisuccinate and 3,4,5-tricarboxylic acid aniline. As a result, the tensile strength of Examples 7-11 is higher than that of Examples 5-6, indicating that the strength of the steel strands is further enhanced by the compound use of tetrasodium iminodisuccinate and 3,4,5-tricarboxylic acid aniline.

[0039] Compared with Example 8, the mass of tetrasodium iminodisuccinate in the steel strands prepared in Examples 7 and Examples 9 to 11 is ≤ the mass of 3,4,5-tricarboxylic acid aniline. As a result, the tensile strength of Examples 7 and Examples 9 to 11 is higher than that of Example 8, indicating that the strength of the steel strand is further enhanced by limiting the mass of tetrasodium iminodisuccinate to ≤ the mass of 3,4,5-tricarboxylic acid aniline.

[0040] Compared with Example 7, the mass ratio of tetrasodium iminodisuccinate and 3,4,5-tricarboxylic acid aniline in the steel strands prepared in Examples 10 to 11 is 1:3 to 4. As a result, the tensile strength of Examples 10 to 11 is higher than that of Example 7, indicating that the strength of the steel strand is further enhanced by limiting the mass ratio of tetrasodium iminodisuccinate and 3,4,5-tricarboxylic acid aniline to 1:3 to 4.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-strength steel strand, characterized in that: From the inside to the outside, it includes bare stranded wire and resin coating. The raw materials of the resin coating include the following components in parts by weight: 100 parts of epoxy resin, 5-10 parts of modifier-modified alumina, 8-12 parts of curing agent, 3-8 parts of curing accelerator, and 10-20 parts of diluent. The modifier of the modifier-modified alumina is tetrasodium iminodisuccinate and / or 3,4,5-tricarboxylic acid aniline.

2. A high-strength steel strand according to claim 1, characterized in that: The raw materials of the modifier-modified alumina include the modifier and alumina in a mass ratio of 0.01 to 0.2:

10.

3. A high-strength steel strand according to claim 2, characterized in that: The raw materials of the modifier-modified alumina include the modifier and alumina in a mass ratio of 0.05 to 0.1:

10.

4. The high-strength steel strand according to claim 1, characterized in that: The modifier for modifying aluminum oxide comprises tetrasodium iminodisuccinate and 3,4,5-tricarboxylic acid aniline in a mass ratio of 1:9 to 9:

1.

5. A high-strength steel strand according to claim 4, characterized in that: The mass of the tetrasodium iminodisuccinate is ≤ the mass of 3,4,5-tricarboxylic acid aniline.

6. A high-strength steel strand according to claim 5, characterized in that: The mass ratio of the tetrasodium iminodisuccinate to 3,4,5-tricarboxylic acid aniline is 1:3-4.

7. The high-strength steel strand according to claim 1, characterized in that: The diluent is active diluent AGE.

8. The high-strength steel strand according to claim 1, characterized in that: The curing agent is a latent curing agent.

9. A high-strength steel strand according to any one of claims 1 to 8, characterized in that: The preparation method of the modifier-modified aluminum oxide comprises the following steps: The modifier is dissolved in water, and aluminum oxide is added and mixed evenly, filtered, and dried to obtain the modifier-modified aluminum oxide.

10. A production process for a high-strength steel strand according to any one of claims 1 to 9, characterized in that: The following steps are involved: The bare stranded wire is immersed in a resin coating and cured to obtain a high-strength steel stranded wire.

Images