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Pretreatment technology for steel bar wire drawing

A steel bar and process technology, applied in the field of pretreatment process of steel bar wire drawing, can solve the problems of difficulty in balancing the reaction time and taking into account the corrosion resistance of steel bars, so as to ensure corrosion resistance, increase contact efficiency and good reaction effect. Effect

Inactive Publication Date: 2020-05-26
天津市银丰钢绞线股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a pretreatment process for steel wire drawing, which solves the problem that the phosphating treatment in the existing steel strand pretreatment process is difficult to balance the reaction time and the corrosion resistance of the steel bar after wire drawing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A pretreatment process for steel rod wire drawing, comprising the following steps:

[0031] S0. Degreasing: The steel bar is soaked in a degreasing solvent to remove the oil on the surface of the steel bar, which facilitates the contact between the reaction solution and the surface of the steel bar in the subsequent pickling and phosphating reactions, and the reaction is more uniform.

[0032] S1. Pickling. Soak the steel bar in dilute hydrochloric acid with a concentration of 10% to 15% to remove the rust on the surface of the steel bar, which is conducive to the uniform attachment of the phosphating film on the surface of the steel bar during the phosphating reaction.

[0033] S11. Wash with water. Remove residual acid from pickling.

[0034] S2. Phosphating treatment. Phosphating treatment is mainly to form a phosphating film on the surface of the steel bar, and use the phosphating film to improve the corrosion resistance of the steel bar.

[0035] S21. Normal te...

Embodiment 2

[0040] A pretreatment process for steel rod wire drawing, comprising the following steps:

[0041] S0. Degreasing: The steel bar is soaked in a degreasing solvent to remove the oil on the surface of the steel bar, which facilitates the contact between the reaction solution and the surface of the steel bar in the subsequent pickling and phosphating reactions, and the reaction is more uniform.

[0042] S1. Pickling. Soak the steel bar in dilute hydrochloric acid with a concentration of 10% to 15% to remove the rust on the surface of the steel bar, which is conducive to the uniform attachment of the phosphating film on the surface of the steel bar during the phosphating reaction.

[0043] S11. Wash with water. Remove residual acid from pickling.

[0044] S2. Phosphating treatment. Phosphating treatment is mainly to form a phosphating film on the surface of the steel bar, and use the phosphating film to improve the corrosion resistance of the steel bar.

[0045] S21. Normal te...

Embodiment 3

[0050] A pretreatment process for steel rod wire drawing, comprising the following steps:

[0051]S0. Degreasing: The steel bar is soaked in a degreasing solvent to remove the oil on the surface of the steel bar, which facilitates the contact between the reaction solution and the surface of the steel bar in the subsequent pickling and phosphating reactions, and the reaction is more uniform.

[0052] S1. Pickling. Soak the steel bar in dilute hydrochloric acid with a concentration of 10% to 15% to remove the rust on the surface of the steel bar, which is conducive to the uniform attachment of the phosphating film on the surface of the steel bar during the phosphating reaction.

[0053] S11. Wash with water. Remove residual acid from pickling.

[0054] S2. Phosphating treatment. Phosphating treatment is mainly to form a phosphating film on the surface of the steel bar, and use the phosphating film to improve the corrosion resistance of the steel bar.

[0055] S21. Normal tem...

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PUM

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Abstract

The invention relates to anti-corrosion surface treatment, in particular to a pretreatment technology for steel bar wire drawing. The pretreatment technology includes the following step that S2, phosphorization treatment is conducted. The step of phosphorization treatment includes the sub steps that S21, normal-temperature phosphorization treatment is conducted, wherein a steel bar is soaked in aphosphating solution with the temperature being 10 DEG C to 40 DEG C, and the soaking time is 2 min to 6 min; and S22, medium-temperature phosphating treatment is conducted, wherein the steel bar is soaked in a phosphating solution with the temperature being 50 DEG C to 75 DEG C afterwards, and the soaking time is 1 min to 3 min. By means of the pretreatment technology, normal-temperature phosphorization treatment is combined with medium-temperature phosphorization treatment, a special phosphating film structure with a fine crystal phosphating film formed on the inner side and a rough crystalphosphating film formed on the outer side is formed, the anti-corrosion performance obtained after steel bar wire drawing is ensured, and the reaction time is also shortened.

Description

technical field [0001] The invention relates to an anti-corrosion surface treatment process, in particular to a pre-treatment process for steel bar wire drawing. Background technique [0002] Steel strands are steel products twisted from multiple steel bars, and are often used in catenary cables, guy wires, reinforcing cores, ground wires for overhead power transmission, etc. Steel strand processing technology includes pre-treatment process and processing and forming process. The pre-treatment process is mainly to carry out surface treatment on steel bars, which is convenient to improve the product quality of steel strand wire drawing and joint stranding in processing and forming process, and increase the mechanical strength of steel strand. performance. [0003] The existing steel strand pretreatment process includes pickling, phosphating treatment and saponification treatment; pickling is to use dilute hydrochloric acid to react with the surface of the steel bar, in order...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/73C23C22/78
CPCC23C22/73C23C22/78
Inventor 李宗行
Owner 天津市银丰钢绞线股份有限公司