Smelting method for copper-clad steel

A smelting method, copper-clad steel technology, which is applied in the field of steelmaking, can solve the problems of copper-clad steel wire rod being easy to work and harden, and achieve the effects of streamlining the smelting process, reducing costs and maintaining product quality

Active Publication Date: 2017-06-13
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Patent CN102268595B discloses a production method of steel for copper-clad steel, which mainly solves the problem of easy work hardening of copper-clad steel wire rods by controlling the rolling process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The short-process smelting process of copper-clad steel is BOF smelting-LF refining-billet continuous casting process. details as follows:

[0018] (1) In BOF smelting, end point [C]=0.035%, end point T=1624°C, slag blocking and tapping, molten steel P=0.010%, S=0.022%; argon gas is blown at the bottom of the ladle when tapping, and the pressure in the early stage is 0.8 Mpa, 0.4Mpa in the later stage, the full reaction of residual oxygen and carbon in the molten steel is promoted by argon stirring, and the molten steel C=0.021%.

[0019] (2) In LF refining, the whole process is operated under slight positive pressure; slag (FeO+MnO)=0.86%, (CaO) / (SiO 2 )=11.3, SiO 2 = 4.72%. Add aluminum wire to the slag surface to quickly create white slag, add enough aluminum alloy to the molten steel in the early stage for one-time deoxidation, Al=0.026%, calcium treatment after refining, Ca=0.0017%, static stirring time=12min, to ensure that the inclusions are fully floating . ...

Embodiment 2

[0023] The short-process smelting process of copper-clad steel is BOF smelting-LF refining-billet continuous casting process. details as follows:

[0024] (1) In BOF smelting, end point [C] = 0.031%, end point T = 1671°C, slag blocking and tapping, molten steel P = 0.009%, S = 0.028%; argon gas is blown at the bottom of the ladle when tapping, and the pressure in the early stage is 0.7 Mpa, 0.5Mpa in the later stage, promote the full reaction of residual oxygen and carbon in molten steel through argon stirring, and molten steel C=0.019%.

[0025] (2) In LF refining, the whole process is operated under slight positive pressure; slag (FeO+MnO)=0.78%, (CaO) / (SiO 2 )=9.8, SiO 2 = 4.45%. Add aluminum wire to the slag surface to quickly create white slag, add enough aluminum alloy to the molten steel in the early stage for one-time deoxidation, Al=0.042%, calcium treatment after refining, Ca=0.0022%, static stirring time=11min, to ensure that the inclusions are fully floating . ...

Embodiment 3

[0029] The short-process smelting process of copper-clad steel is BOF smelting-LF refining-billet continuous casting process. details as follows:

[0030] (1) In BOF smelting, the end point [C]=0.030%, the end point T=1655°C, the slag is blocked and the steel is tapped, the molten steel P=0.009%, S=0.028%; the bottom of the ladle is blown with argon when tapping, and the pressure is 0.7 in the early stage Mpa, 0.5Mpa in the later stage, promote the full reaction of residual oxygen and carbon in molten steel through argon stirring, and molten steel C=0.019%.

[0031] (2) In LF refining, the whole process is operated under slight positive pressure; slag (FeO+MnO)=0.82%, (CaO) / (SiO 2 )=10.5, SiO 2 = 4.79%. Add aluminum wire to the slag surface to quickly create white slag, add enough aluminum alloy to the molten steel in the early stage for one-time deoxidation, Al=0.032%, calcium treatment after refining, Ca=0.0021%, static stirring time=12min, to ensure that the inclusions a...

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Abstract

The invention discloses a smelting method for copper-clad steel. A smelting process comprises BOF (Basic Oxygen Furnace) smelting-LF (Ladle Furnace) refining-small square billet continuous casting working procedures in sequence, wherein the BOF smelting controls decarburization strength and tapping temperature, an end point [C] is less than or equal to 0.040%, T is equal to 1620-1680DEG C, and slags are pushed off for tapping; the LF refining controls slag ingredients and static mixing time, (FeO+MnO) is less than or equal to 1.0%, the static mixing time is longer than or equal to 10min, and slag surface deoxidization and calcium feeding processing are carried out; the square billet continuous casting controls pouring temperatures and electromagnetic stirring technologies, T is equal to 1560-1620DEG C, and liquid surface fluctuation and casting speed can be stabilized. Through the smelting method for the copper-clad steel, on the basis of the accurate control on each smelting link, a smelting working procedure of the copper-clad steel is simplified, pre-desulfurization and vacuum processing are omitted, while product quality is kept, production efficiency is improved, cost is lowered, and competitive power is improved.

Description

technical field [0001] The invention belongs to the technical field of steelmaking, and in particular relates to a method for smelting copper-clad steel. Background technique [0002] Copper-clad steel is a steel that can be coated with copper to make a new type of composite wire. This kind of copper-clad steel wire utilizes the skin effect of high-frequency signals, and its conductivity in the field of signal transmission in the high-frequency region is similar to that of copper wires with circular cross-sections. Therefore, it is widely used in many fields such as electric power, transportation, communications, and electronics industries. Such as the central conductor of communication cables, shielded braided wires of communication cables, pin wires of electronic components, twisted ground wires and electrified railway lines, etc. Copper-clad steel wire has the advantages of light weight, high strength, and low manufacturing cost, especially in saving scarce copper resour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/28C21C7/06C21C7/064C21C7/00B22D11/111B22D11/115
CPCB22D11/111B22D11/115C21C5/28C21C7/0006C21C7/06C21C7/064Y02P10/20
Inventor 苑阳阳赵家七邹长东麻晗
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE
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