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Steel wire rod, heat treatment method and production method of steel wire rod and galvanized steel wire

A heat treatment method and production method technology, applied in heat treatment baths, heat treatment furnaces, heat treatment equipment, etc., can solve the problem of inability to provide high-strength and high-torsion performance wire rods, achieve comprehensive performance improvement, improve strength and toughness, significant effect

Active Publication Date: 2022-02-11
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defect in the prior art that it cannot provide a wire rod with both high strength and high torsional performance, so as to provide a wire rod Bar, heat treatment method and production method thereof, and galvanized steel wire

Method used

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  • Steel wire rod, heat treatment method and production method of steel wire rod and galvanized steel wire
  • Steel wire rod, heat treatment method and production method of steel wire rod and galvanized steel wire
  • Steel wire rod, heat treatment method and production method of steel wire rod and galvanized steel wire

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Embodiment 1

[0037] This embodiment provides a production method of wire rod, the process is as follows: hot metal desulfurization, converter smelting, LF refining, bloom continuous casting, billet opening, billet grinding, hot rolling, heat treatment. In the basic composition, the content of C is 1.02% by weight, the content of Mn is 0.82%, the content of Cr is 0.32%, the content of Si is 1.16%, the content of V is 0.01%, the content of Al is 0.01%, and the rest is Fe and unavoidable impurity elements.

[0038] In the converter smelting process, the loading amount of molten iron is 116t, the loading amount of high-quality steel scrap is 22t, the basicity of the final slag of the converter is 3.5, and the final tapping temperature is 1656°C;

[0039] In the LF refining process, the soft blowing time is controlled for 32 minutes, the white slag retention time is 18 minutes, the final refining slag has a basicity of 2.0, and T.Fe+MnO is 1.4%;

[0040] In the bloom continuous casting process,...

Embodiment 2

[0047] This embodiment provides a production method of wire rod, the process is as follows: hot metal desulfurization, converter smelting, LF refining, bloom continuous casting, billet opening, billet grinding, hot rolling, heat treatment. In the basic components, the C content is 0.96%, the Mn content is 0.83%, the Cr content is 0.28%, the Si content is 1.20%, the V content is 0.01%, and the Al content is 0.02%.

[0048] In the converter smelting process, the amount of molten iron loaded is 115t, the amount of high-quality steel scrap loaded is 21t, the basicity of the final slag of the converter is 3.5, and the final tapping temperature is 1666°C.

[0049] In the LF refining process, the soft blowing time is controlled for 34 minutes, the white slag retention time is 16 minutes, the basicity of the final refining slag is 2.0, and the T.Fe+MnO is 1.4%.

[0050] In the bloom continuous casting process, the dynamic light reduction is controlled to 20mm, and the billet size is 3...

Embodiment 3

[0057]This embodiment provides a production method of wire rod, the process is as follows: hot metal desulfurization, converter smelting, LF refining, bloom continuous casting, billet opening, billet grinding, hot rolling, heat treatment. In the basic composition, the C content is 1.04%, the Mn content is 0.85%, the Cr content is 0.35%, the Si content is 1.18%, the V content is 0.02%, and the Al content is 0.02%.

[0058] In the converter smelting process, the amount of molten iron loaded is 114t, the amount of high-quality steel scrap loaded is 22t, the basicity of the final slag of the converter is 3.5, and the final tapping temperature is 1645°C;

[0059] In the LF refining process, the soft blowing time is controlled for 31 minutes, the white slag retention time is 17 minutes, the basicity of the final refining slag is 2.0, and the T.Fe+MnO is 1.2%;

[0060] In the bloom continuous casting process, the dynamic light reduction is controlled to 19mm, and the billet size is 3...

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Abstract

The invention relates to the technical field of galvanized steel wire manufacturing, and particularly provides a steel wire rod, a heat treatment method and a production method of the steel wire rod and a galvanized steel wire. The heat treatment method of the steel wire rod comprises the steps that the hot-rolled steel wire rod is subjected to austenitizing heating and salt bath treatment, and the steel wire rod comprises the following basic components in percentage by weight: more than or equal to 0.95% of C. The specific heat treatment method is defined in the specification, the austenitizing heating temperature is controlled according to the grade of network cementite and the grade of martensite of the steel wire rod in combination with the C content, the salt bath temperature is controlled according to the diameter of the steel wire rod, the salt bath routing speed is controlled according to the grade of network cementite and the grade of martensite of the steel wire rod in combination with the diameter of the steel wire rod. The three components match one another, the tensile strength of the obtained steel wire rod is larger than or equal to 1550 MPa, the area reduction rate is larger than or equal to 35%, the sorbite rate is larger than or equal to 97%, the sorbite lamellar spacing is smaller than or equal to 70 nm, and the galvanized steel wire manufactured through the steel wire rod has high strength and high torsion performance.

Description

technical field [0001] The invention relates to the technical field of galvanized steel wire manufacturing, in particular to a wire rod, a heat treatment method and a production method thereof, and a galvanized steel wire. Background technique [0002] High-carbon steel wire rod is the main raw material for the production of galvanized steel wire for bridge cables. This type of wire rod requires high strength and high uniformity of structure to meet the high strength and high torsional performance requirements of the processed steel wire. [0003] In order to meet the trend of high-strength development of wire rods in existing production, the initial strength of wire rods is often increased by increasing the content of C and alloy elements, and the addition of C and alloy content will increase the difficulty of segregation control. Hot-rolled Stellm air-cooled Abnormal structures such as martensite and reticular cementite are prone to appear in the structure, resulting in la...

Claims

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Application Information

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IPC IPC(8): C21D1/46C21D1/34C21D9/52C22C38/18C22C38/24C22C38/06C22C38/04
CPCC21D1/46C21D1/34C21D9/52C22C38/18C22C38/24C22C38/06C22C38/04Y02P10/20
Inventor 李月云喻智晨王雷张宇
Owner ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO LTD
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