Production method of steel wire rod for very fine copper-clad steel wire

A copper-clad steel wire and production method technology, which is applied in the field of copper-clad steel wire wire rod production technology, can solve the problems that steel wire rod cannot meet the requirements, and the production process of ultra-fine steel wire rod for mobile phones is difficult

Inactive Publication Date: 2018-02-09
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] It can be seen from the user's production process that this kind of steel wire rod needs to undergo extra large cold drawing deformation during processing, so it is required to have excellent d

Method used

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  • Production method of steel wire rod for very fine copper-clad steel wire

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Experimental program
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Effect test

Embodiment 1

[0066] According to the above process, the specific process parameters of this embodiment are as follows: S = 0.001% of the molten iron into the furnace, converter smelting: the end carbon is 0.05%, and O is controlled at 0.040%. Tapping temperature: 1690°C; tapping without pre-deoxidation. RH refining: the cycle time after adding aluminum for final deoxidation is 12 minutes, and the finished acid-soluble aluminum is controlled at 0.010%. According to the steel composition requirements, the chemical composition of the molten steel (in the tundish) is: C 0.001%, Si 0.01%, Mn 0.25%, P 0.010%, S0.008%, N 0.005%, Als0.01%, Cu+Ni+ Cr+Mo=0.050; the steel is heated to 1200°C in the furnace, and the cross-sectional temperature difference is ≤30°C. Insulate for 180min to fully austenitize the steel. The austenitizing temperature and time are related to the composition of the steel. It is necessary to ensure that the alloying elements in the steel are completely dissolved, the furnace...

Embodiment 2

[0068] According to the above process, the specific process parameters of this embodiment are as follows: S = 0.0009% of molten iron into the furnace, converter smelting: end point carbon is 0.045%, and O is controlled at 0.045%. Tapping temperature: 1693°C; tapping without pre-deoxidation. RH refining: the cycle time after adding aluminum for final deoxidation is 13 minutes, and the finished acid-soluble aluminum is controlled at 0.009%. According to the requirements of steel composition, the chemical composition of molten steel (in the tundish) is: C 0.002%, Si 0.003%, Mn 0.20%, P 0.008%, S 0.005%, N 0.003%, Als0.01%, Cu+Ni+Cr +Mo=0.040; the steel is heated to 1200°C in the furnace, and the cross-sectional temperature difference is ≤30°C. Insulate for 160min to fully austenitize the steel. The austenitizing temperature and time are related to the composition of the steel. It is necessary to ensure that the alloying elements in the steel are completely dissolved, the furnac...

Embodiment 3

[0070] According to the above process, the specific process parameters of this embodiment are as follows: S = 0.0008% of the molten iron into the furnace, converter smelting: the end carbon is 0.040%, and O is controlled at 0.051%. Tapping temperature: 1698°C; tapping without pre-deoxidation. RH refining: the cycle time after adding aluminum for final deoxidation is 14 minutes, and the finished acid-soluble aluminum is controlled at 0.008%. According to the requirements of steel composition, the chemical composition of molten steel (in the tundish) is: C 0.003%, Si 0.006%, Mn 0.15%, P 0.007%, S 0.005%, N 0.003%, Als0.008%, Cu+Ni+Cr +Mo=0.030; the steel is heated to 1200°C in the furnace, and the cross-sectional temperature difference is ≤30°C. Insulate for 140min to fully austenitize the steel. The austenitizing temperature and time are related to the composition of the steel. It is necessary to ensure that the alloying elements in the steel are completely dissolved, the fur...

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Abstract

The invention discloses a production method of a steel wire rod for a very fine copper-clad steel wire. The production method comprises the following steps of a steelmaking procedure and a controlledrolling procedure, wherein the steelmaking procedure comprises the following steps of 1) molten iron pretreatment; 2) converter steelmaking; 3) argon blowing; 4) RH refining: controlling the mass content of carbon in molten steel to be smaller than or equal to 0.003 percent, the mass content of free oxygen to be smaller than or equal to 15ppm and the mass ratio of manganese and sulfur to be Mn/S larger than or equal to 10; and 5) continuous casting; and the controlled rolling procedure comprises the following steps of 6) heating, wherein a temperature of a heating section is 1050-1150 DEG C, atemperature of a heat balance section is 1150 plus/minus 50 DEG C, and a section temperature difference is smaller than or equal to 30 DEG C; 7) roughing; 8) finishing: a temperature of an inlet of afinishing mill is 900 plus/minus 15 DEG C, and a temperature of an inlet of a reducing sizing mill is 890 plus/minus 10 DEG C; and 9) cooling control: controlling cooling on a Stelmor cooling controlline, wherein a laying temperature of a laying machine is 890 plus/minus 10 DEG C, and the average cooling rate is 0.5-1.5 DEG C/s. The steel wire rod produced by the method has especially good colddrawing performance and higher conductivity and meets the requirements for the steel wire rod for the very fine copper-clad steel wire by electronic products including mobile phones.

Description

technical field [0001] The invention relates to a production process of copper-clad steel wire rod, in particular to a production method of steel wire rod for ultra-fine copper-clad steel wire. Background technique [0002] Copper-clad steel wire utilizes the skin effect of high-frequency signal transmission, which not only ensures the quality of signal transmission, but also increases the strength and toughness of the wire. Ultra-fine copper-clad steel wire is mainly used in electronic products, such as integrated blocks in mobile phones, electrical component pins, mobile phone earphone cables, mobile phone charging cables, etc. The wire diameter is very thin, generally 0.05mm to 0.10mm. [0003] The requirements of ultra-fine copper-clad steel wire for steel wire rod are: excellent cold working performance, and high electrical conductivity, preferably above 14%. The cold processing performance must be excellent to process into extremely fine wire; the wire rod has high co...

Claims

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Application Information

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IPC IPC(8): C22C33/04C21D8/06C22C38/02C22C38/04C22C38/06C22C38/16C22C38/12C22C38/08C22C38/18C22C38/22C22C38/24C22C38/40C22C38/42C22C38/44C21C7/06C21C7/064C21C7/068C21C7/10
CPCC22C33/04C21C7/0006C21C7/06C21C7/064C21C7/068C21C7/10C21D8/065C22C38/004C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/16C22C38/18C22C38/22C22C38/24C22C38/40C22C38/42C22C38/44
Inventor 帅习元仇东丽鲁修宇周勇黄静张洪钢黄成红吕学斌
Owner 武汉钢铁有限公司
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