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Steel for shielding wire and its production method

A technology of shielded wire and molten steel, applied in the field of steel for electrical cables, to achieve good cold drawing performance and no deformation of the product

Active Publication Date: 2016-05-18
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But before the present invention, also there is not a kind of steel for shielding wire with excellent comprehensive performance and its production method on the market

Method used

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  • Steel for shielding wire and its production method

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Effect test

Embodiment 1

[0021] A steel for shielding wires, according to the requirements of steel composition, the chemical composition of molten steel is: C: 0.001%, Si: 0.01%, Mn: 0.15%, P: 0.005%, S: 0.009%, Ti: 0.01%, the balance It is Fe and unavoidable impurities.

[0022] The production method of the steel for shielding wire is carried out according to the usual pure steel process, including the following steps: blast furnace molten iron desulfurization treatment, converter smelting, argon blowing, RH furnace treatment, continuous casting, billet acceptance, billet heating, high-wire rolling , Steyrmo controlled cooling, volume collection, and the steps of bundling and packaging, wherein,

[0023] Desulfurization treatment of hot metal in blast furnace: use magnesium powder desulfurization process, and control the percentage of S in the station to be ≤0.010%;

[0024] During converter smelting, the whole process of top-bottom compound blowing is carried out, the content of each element [C]≤0...

Embodiment 2

[0032] A steel for shielding wires, according to the steel composition requirements, the chemical composition of molten steel is: C: 0.002%, Si: 0.008%, Mn: 0.12%, P: 0.007%, S: 0.003%, Ti: 0.03% , the balance is Fe and unavoidable impurities.

[0033] The production method of steel for this shielding wire, basic steps are the same as embodiment 1, and difference is:

[0034] When blowing argon: argon pressure is 0.7MPa, argon flow rate is 12Nm 3 / min, the molten steel arrives at the station and blows argon for 7 minutes, then sprinkles aluminum shot and calcium carbide on the slag surface of the large tank, the dosage of aluminum shot is 52kg per ton of molten steel, and the dosage of calcium carbide is 15kg per ton of molten steel;

[0035] During continuous casting, the target superheat of molten steel in the tundish is 40°C, and the casting speed is 1.0m / min;

[0036]When the billet is heated, the temperature in the soaking section is 1150°C, the cross-sectional temperat...

Embodiment 3

[0039] A steel for shielding wires, according to the steel composition requirements, the chemical composition of molten steel is: C: 0.003%, Si: 0.006%, Mn: 0.10%, P: 0.009%, S: 0.005%, Ti: 0.10%, the balance It is Fe and unavoidable impurities. The product diameter is 6.5mm.

[0040] The production method of steel for this shielding wire, basic steps are the same as embodiment 1, and difference is:

[0041] When blowing argon: Argon pressure is 0.4MPa, argon flow rate is 15.0Nm 3 / min, the molten steel arrives at the station and blows argon for 10 minutes, then sprinkles aluminum shot and calcium carbide on the slag surface of the large tank, the dosage of aluminum shot is 50kg per ton of molten steel, and the dosage of calcium carbide is 15kg per ton of molten steel;

[0042] During continuous casting, the target superheat of molten steel in the tundish is 35°C, and the casting speed is 0.9m / min;

[0043] When the billet is heated, the temperature in the soaking section i...

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Abstract

The invention discloses steel for shielded wires and a manufacturing method of the steel. The steel comprises the following chemical components in percentage by weight: 0.001-0.05% of C, 0.001-0.1% of Si, 0.05-0.20% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.01-0.25% of Ti, and the balance of Fe and inevitable impurities. The manufacturing method is carried out according to the regular technology of clean steel, and comprises the following steps: conducting molten iron desulphurization treatment in a blast furnace; smelting in a converter; argon blowing; processing in an RH furnace; continuous casting; billet accepting; billet heating; high line rolling; stelmor controlled cooling; coil collecting; baling and packaging. Practice proves that the steel is high in strength, good in toughness and light in weight; meanwhile, the manufacturing method is simple in technology and convenient to operate.

Description

technical field [0001] The invention relates to the technical field of steel for electrical cables, in particular to a steel for shielding wires and a production method. Background technique [0002] The shielding wires widely used in the electrical cable industry were mainly made of pure copper in the past. In recent years, steel for ultra-low carbon shielded wires has been widely used in the production of various shielded wires because of its high purity, low cold hardening, excellent drawing performance, and excellent shielding function. Steel wire rods for ultra-low shielded wires are used to produce shielded wires. Compared with shielded wires made of pure copper, they have rapidly developed into an update of the latter due to their high strength, good toughness, light weight and good shielding effect. The replacement variety has great potential for market promotion. At the same time, because the steel has excellent cold workability and toughness, and has a high conte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/14C21D8/06
Inventor 帅习元仇东丽周勇鲁修宇任安超黄静罗国华夏艳花刘婳吴超黄成红邱俊贾万军陶勇吕学斌叶巍刘明辉
Owner 武汉钢铁有限公司
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