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Ultra-low carbon wire rod with high conductivity and production method of wire rod

A technology of ultra-low carbon wire rod and high conductivity, which is applied in the field of iron and steel smelting and high-speed wire rolling. The effect of pullability

Inactive Publication Date: 2017-06-30
XINGTAI IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] So far, there have been no relevant reports on the low-cost, high-conductivity stable production process of ultra-low carbon wire rods in this field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] An ultra-low carbon wire rod with high electrical conductivity, the main chemical composition and its mass percentage are as follows: C: 0.002%, Si: 0.012%, Mn: 0.08%, P: 0.008%, S: 0.010%, Si eq : 0.073%, the rest is iron and unavoidable impurities. The specification is Φ5.5mm, and the conductivity of the finished product is 16.3%.

[0021] The production method of ultra-low carbon wire rod comprises the following steps:

[0022] (1) Smelting process

[0023] The smelting process includes: hot metal desulfurization treatment, top-bottom combined blowing converter smelting, LF furnace refining and RH vacuum refining.

[0024] (2) Slab casting process

[0025] After the slab is opened, the hot-rolled slab is heated for the second time. During the slab opening and the second heating, the heating furnace is first preheated to 1050°C, and then heated to 1065°C for heat preservation; the total time of the continuous casting billet in the heating furnace is 200min , the o...

Embodiment 2

[0031] An ultra-low carbon wire rod with high electrical conductivity, the main chemical composition and its mass percentage are as follows: C: 0.012%, Si: 0.004%, Mn: 0.04%, P: 0.015%, S: 0.008%, Si eq : 0.080%, the rest is iron and unavoidable impurities. The specification is Φ6.5mm, and the conductivity of the finished product is 16.4%.

[0032] The production method of ultra-low carbon wire rod comprises the following steps:

[0033] (1) Smelting process

[0034] The smelting process includes: hot metal desulfurization treatment, top-bottom combined blowing converter smelting, LF furnace refining and RH vacuum refining.

[0035] (2) Slab casting process

[0036] After the slab is opened, the hot-rolled slab is heated for the second time. During the slab opening and the second heating, the heating furnace is first preheated to 1040°C, and then heated to 1060°C for heat preservation; the total time of the continuous casting billet in the heating furnace is 240min , the o...

Embodiment 3

[0042] An ultra-low carbon wire rod with high electrical conductivity, the main chemical composition and its mass percentage are as follows: C: 0.008%, Si: 0.007%, Mn: 0.06%, P: 0.005%, S: 0.005%, Si eq : 0.066%, the rest is iron and unavoidable impurities. The specification is Φ7.0mm, and the conductivity of the finished product is 16.3%.

[0043] The production method of ultra-low carbon wire rod comprises the following steps:

[0044] (1) Smelting process

[0045] The smelting process includes: hot metal desulfurization treatment, top-bottom combined blowing converter smelting, LF furnace refining and RH vacuum refining.

[0046] (2) Slab casting process

[0047] After the slab is opened, the hot-rolled slab is heated for the second time. During the slab opening and the second heating, the heating furnace is first preheated to 1060°C, and then heated to 1070°C for heat preservation; the total time of the continuous casting billet in the heating furnace is 220min , the o...

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Abstract

The invention discloses an ultra-low carbon wire rod with high conductivity and a production method of the wire rod. The ultra-low carbon wire rod comprises main chemical components including, by mass percent, not larger than 0.012% of C, not larger than 0.012% of Si, not larger than 0.08% of Mn, not larger than 0.015% of P, not larger than 0.010% of S, not larger than 0.080% of Sieq, and the balance iron and inevitable impurities. The production method comprises smelting, casting, wire rolling and wire cooling. The specification of the ultra-low carbon wire rod is phi5.5 to 9.0mm, the conductivity is larger than or equal to 16.3%, and due to the high conductivity, the good pulling and drawing and good comprehensive mechanics property of the wire rod, the thickness of the copper layer coated on the surface of the wire during downstream customer machining can be effectively reduced, and therefore the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of iron and steel smelting and high-speed wire rolling, and relates to an ultra-low-carbon wire rod with high electrical conductivity and a production method thereof. Background technique [0002] Hot-rolled wire rod with certain conductivity is widely used in copper-clad steel wire, coaxial cable, electronic components and other fields due to its good conductivity and mechanical properties, after drawing, heat treatment, copper plating and other processing processes. However, due to cost considerations, downstream customers such as copper-clad steel wire, coaxial cables, and electronic components require that the conductivity value of the hot-rolled wire rod used is ≥16.3%, and the control level is stable. [0003] Patent 201110409858.X discloses a "low-resistance low-carbon steel and its preparation method and its use in the preparation of copper-clad steel wire", the chemical composition of the low-carbon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C33/04C21D8/06
CPCC22C38/004C21D8/065C22C33/04C22C38/002C22C38/02C22C38/04
Inventor 李宝秀郭明仪田新中张治广戴永刚韩广杰李世琳阮士朋陈至立黄翠环
Owner XINGTAI IRON & STEEL
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