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ER70S-6 hot-rolled wire rod and preparation method thereof

A technology of ER70S-6, hot-rolled wire rod, applied in the field of ER70S-6 hot-rolled wire rod and its preparation, can solve the problems of ER70S-6 welding wire steel wire rod fracture, etc., to solve the problem of drawing fracture and increase drawing performance, the effect of reducing the tensile strength

Pending Publication Date: 2022-02-18
建龙北满特殊钢有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide an ER70S-6 hot-rolled wire rod and its preparation method, which effectively solves the fracture problem of the ER70S-6 welding wire steel wire rod during the drawing process

Method used

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  • ER70S-6 hot-rolled wire rod and preparation method thereof
  • ER70S-6 hot-rolled wire rod and preparation method thereof
  • ER70S-6 hot-rolled wire rod and preparation method thereof

Examples

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specific Embodiment approach 1

[0022] A method for preparing ER70S-6 hot-rolled wire rod, the process route of the described method for preparing ER70S-6 hot-rolled wire rod is: converter smelting → LF refining → six-machine six-strand curved billet continuous casting machine Continuous casting→regenerative heating furnace heating→phosphorus removal by high-pressure water→wire rolling→bundling→weighing→listing→storage.

[0023] The preparation method of a ER70S-6 hot-rolled wire rod described in this embodiment, the product chemical composition of the ER70S-6 hot-rolled wire rod is C content 0.060wt%, Si content 0.81wt%, Mn content 1.43wt%, Cr content≤0.080wt%, Cu content≤0.01wt%, Ni content≤0.01wt%, Mo content≤0.01wt%, V content≤0.01wt%, Ni+Mo+V content≤0.02%, Ca content≤0.0008wt%, P content≤0.015wt%, S content≤0.015wt%, Ti content≤0.01wt%, N content≤0.004wt%, and the balance is Fe.

[0024] In the preparation method of ER70S-6 hot-rolled wire rod described in this embodiment, in the converter smelting pr...

specific Embodiment approach 2

[0035] A method for preparing ER70S-6 hot-rolled wire rod, the process route of the described method for preparing ER70S-6 hot-rolled wire rod is: converter smelting → LF refining → six-machine six-strand curved billet continuous casting machine Continuous casting→regenerative heating furnace heating→phosphorus removal by high-pressure water→wire rolling→bundling→weighing→listing→storage.

[0036] The preparation method of a ER70S-6 hot-rolled wire rod described in this embodiment, the product chemical composition of the ER70S-6 hot-rolled wire rod is C content 0.070wt%, Si content 0.85wt%, Mn content 1.47wt%, Cr content≤0.080wt%, Cu content≤0.01wt%, Ni content≤0.01wt%, Mo content≤0.01wt%, V content≤0.01wt%, Ni+Mo+V content≤0.02%, Ca content≤0.0008wt%, P content≤0.015wt%, S content≤0.015wt%, Ti content≤0.01wt%, N content≤0.004wt%, and the balance is Fe.

[0037] In the preparation method of ER70S-6 hot-rolled wire rod described in this embodiment, the taphole firing times in ...

specific Embodiment approach 3

[0050] A method for preparing ER70S-6 hot-rolled wire rod, the process route of the described method for preparing ER70S-6 hot-rolled wire rod is: converter smelting → LF refining → six-machine six-strand curved billet continuous casting machine Continuous casting→regenerative heating furnace heating→phosphorus removal by high-pressure water→wire rolling→bundling→weighing→listing→storage.

[0051] The preparation method of a ER70S-6 hot-rolled wire rod described in this embodiment, the product chemical composition of the ER70S-6 hot-rolled wire rod is C content 0.065wt%, Si content 0.82wt%, Mn content 1.44wt%, Cr content≤0.080wt%, Cu content≤0.01wt%, Ni content≤0.01wt%, Mo content≤0.01wt%, V content≤0.01wt%, Ni+Mo+V content≤0.02%, Ca content≤0.0008wt%, P content≤0.015wt%, S content≤0.015wt%, Ti content≤0.01wt%, N content≤0.004wt%, and the balance is Fe.

[0052] In the preparation method of ER70S-6 hot-rolled wire rod described in this embodiment, in the converter smelting pr...

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Abstract

The invention discloses an ER70S-6 hot-rolled wire rod and a preparation method thereof, and belongs to the technical field of ER70S-6 hot-rolled wire rod preparation. The invention aims to solve the technical problem that a conventional ER70S-6 hot-rolled wire rod breaks during drawing. The process route comprises the steps of converter smelting, LF refining, six-machine six-flow arc-shaped square billet continuous casting machine continuous casting, heat storage type heating furnace heating, high-pressure water phosphorus removal, wire rod rolling, bundling, weighing, plate hanging and warehousing. By adjusting the chemical components, the tensile strength of the steel wire rod is effectively reduced, the drawing performance of the steel wire rod is improved, the nitrogen content of the steel wire rod is smaller than or equal to 0.0040%, the coincidence rate reaches 90% or above, and oblique stubble breakage does not occur when the steel wire rod is used for drawing. The structure and thickness of the scale on the surface of the wire rod are improved by adjusting the controlled cooling process, the structure of the wire rod is controlled, abnormal structures are prevented from being generated, and the problem of drawing fracture caused by the abnormal structures is solved.

Description

technical field [0001] The invention belongs to the technical field of ER70S-6 hot-rolled wire rod preparation, and specifically relates to an ER70S-6 hot-rolled wire rod and a preparation method thereof. Background technique [0002] ER70S-6 hot rolled wire rod is mainly used to make CO 2 Gas-shielded solid wire has excellent welding performance and is used in the welding of ships, bridges, engineering machinery, petrochemicals, boilers and pressure vessels. With the improvement of welding automation level in our country, not only the demand for gas shielded welding wire is increasing year by year, but also higher requirements are put forward for product quality. The drawing process of welding wire steel is: Φ5.5mm coiling and unwinding → bending and peeling + abrasive belt grinding → rough drawing to Φ3.2mm after winding → fine drawing to Φ0.8 / 1.0 / 1.2mm after winding → acid / Alkali cleaning→copper plating→packaging in rolls. At present, the main problems are: high tensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/06C22C38/02C22C38/04C21C7/06
CPCC21D8/065C22C38/02C22C38/04C21C7/06
Inventor 邱雪李文武王雪威陶立志王刘艳
Owner 建龙北满特殊钢有限责任公司
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