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Cord steel wire rod and decarburized layer control method thereof

A control method and technology for steel wire rods, which are applied in the field of high carbon steel wire rods, can solve the problems of decarburization of steel wire surface, decrease in strength, and influence on the quality of steel cords and bead steel wires, and achieve the effect of ensuring quality and strength.

Inactive Publication Date: 2018-12-07
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing cord steel wire rod is prone to surface decarburization, which has an important impact on the performance of the cord steel wire and bead wire
Severe decarburization on the surface of the wire rod will lead to serious decarburization on the surface of the steel wire and a decrease in strength, which in turn will affect the quality of the steel cord and bead wire

Method used

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  • Cord steel wire rod and decarburized layer control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A cord steel wire rod suitable for mechanical descaling, its chemical composition by weight percentage is: [C]0.89%, [Si]0.18%, [Mn]0.30%, [P]0.013%, [S]0.0069 , [Cr] 0.21%, [Al] 0.0008%, total oxygen 0.0011%. The diameter of the wire rod is 5.5mm,

[0028] A method for controlling the decarburization layer of a cord steel wire rod, specifically comprising the following steps:

[0029] Step 1. Steel billet heating: the wire rod is produced by billet, the billet heating speed is 0.95min / mm, and the soaking zone temperature is 1059°C; the segregation of carbon, manganese and other elements is reduced through the high-temperature diffusion of the billet;

[0030] Step 2. Wire rod rolling: After the billet is heated, after rough rolling, intermediate rolling, pre-finish rolling and finish rolling, the wire rod spinning operation is carried out. The wire spinning temperature is 885°C; by controlling the wire spinning temperature , to prevent decarburization and deteriorati...

Embodiment 2

[0034] A cord steel wire rod suitable for mechanical descaling, its chemical composition by weight percentage is: [C]0.93%, [Si]0.24%, [Mn]0.32%, [P]0.0096%, [S]0.0092 , [Cr] 0.21%, [Al] 0.0017%, total oxygen 0.0016%. The diameter of the wire rod is 5.5mm,

[0035] A method for producing a cord steel wire rod suitable for mechanical descaling, specifically comprising the steps of:

[0036] Step 1. Steel billet heating: the wire rod is produced by billet, the billet heating speed is 1min / mm, and the soaking zone temperature is 1072°C; the segregation of carbon, manganese and other elements is reduced through the high-temperature diffusion of the billet;

[0037] Step 2, wire rod rolling: After the billet is heated, after rough rolling, intermediate rolling, pre-finish rolling and finish rolling, the wire rod spinning operation is performed, and the wire spinning temperature is 887°C; by controlling the wire spinning temperature , to prevent decarburization and deterioration o...

Embodiment 3

[0041] A cord steel wire rod suitable for mechanical descaling, its chemical composition by weight percentage is: [C]0.92%, [Si]0.17%, [Mn]0.36%, [P]0.011%, [S]0.0084 , [Cr] 0.21%, [Al] 0.0012%, total oxygen 0.0021%. The diameter of the wire rod is 5.5mm,

[0042] A method for producing a cord steel wire rod suitable for mechanical descaling, specifically comprising the steps of:

[0043] Step 1. Steel billet heating: the wire rod is produced by billet, the billet heating speed is 0.98min / mm, and the soaking zone temperature is 1079°C; the segregation of carbon, manganese and other elements is reduced through the high-temperature diffusion of the billet;

[0044] Step 2. Wire rod rolling: After the steel billet is heated, after rough rolling, intermediate rolling, pre-finish rolling and finish rolling, the wire rod spinning operation is carried out. The wire spinning temperature is 895°C; by controlling the wire rod spinning temperature , to prevent decarburization and deter...

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Abstract

The invention relates to a high-carbon steel wire rod, in particular to a cord steel wire rod and a decarburized layer control method thereof. The chemical components of the cord steel wire rod comprise, by weight, 0.89%-0.94% of [C], 0.15%-0.25% of [Si], 0.25%-0.45% of [Mn], smaller than or equal to 0.015% of [P], smaller than or equal to 0.010% of [S], 0.20%-0.25% of [Cr], 0.0008%-0.0020% of [Al] and 0.0010%-0.0025% of total oxygen. The decarburized layer control method particularly comprises the following steps of 1 steel billet heating, specifically, the wire rod is produced by adopting square billets, the steel billet heating speed ranges from 0.93 min / mm to 1.0 min / mm, and the soaking zone temperature ranges from 1,050 DEG C to 1,090 DEG C; 2 wire rod rolling, specifically, after steel billet heating and rough rolling, intermediate rolling, pre-finish rolling and finish rolling are conducted, wire rod spinning operation is conducted, and the wire rod spinning temperature ranges from 880 DEG C to 900 DEG C; and 3 wire rod cooling, specifically, after spinning is conducted, the wire rod is cooled on an air cooling roll way, and the cooling speed ranges from 10 DEG C / s to 25 DEGC / s. The cord steel wire rod mainly contains the sorbite structure. The thickness of a decarburized layer on the surface of the wire rod is not larger than 40 micrometers, the condition that the steel wire strength is reduced due to the fact that the decarburized layer on the surface of the wire rod is inherited to the steel wire surface is prevented, and the steel wire strength and quality are improved.

Description

technical field [0001] The invention relates to a high-carbon steel wire rod, in particular to a cord steel wire rod and a decarburization layer control method thereof. Background technique [0002] With the rapid development of my country's automobile industry, the demand for rubber skeleton reinforcement materials for automobile tires continues to increase. Car tire rubber skeleton reinforcement materials include steel cords and bead wires. Cord steel wire rod, the raw material for producing cord steel wire and bead steel wire, has the characteristics of pure steel, small inclusions, slight segregation, and excellent surface quality. [0003] The existing cord steel wire rod is prone to surface decarburization, and the surface decarburization has an important influence on the properties of the cord steel wire and the bead steel wire. Severe surface decarburization of the wire rod will lead to severe decarburization of the surface of the steel wire and a decrease in stren...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C38/06C21D8/06
CPCC22C38/02C21D8/065C22C38/04C22C38/06C22C38/18
Inventor 郭大勇车安高航韩立涛王秉喜赵学博张博马立国刘磊刚孙浩
Owner ANGANG STEEL CO LTD