Production method of high-plasticity steel wire rod for welding

A technology for welding steel and a production method, which is applied in the field of production of high-plasticity welding steel wire rods, can solve problems such as uneven welds, cracks, and low tensile strength, and achieve improved section shrinkage, simple process lines, and The effect of low production cost

Inactive Publication Date: 2016-03-23
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The alloy welding steel produced by the traditional rolling process cannot meet the needs of users due to its strength and plasticity, resulting in serious cracks and fractures when users perform cold drawing without annealing
[0004] The patent application number is 201310126524.0 which discloses a welding steel and its smelting method. Welding with welding wire made of this welding steel can reduce the defects of uneven weld seam, uneven surface and non-dense filling, but the strength of the steel type is not affected. Require
Patent application number 201510324815.X discloses a steel wire rod for building grids and its preparation method. The steel wire rod prepared by the preparation method has simple chemical composition and low tensile strength, but the highest elongation is 29.1%. Plasticity is not high

Method used

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  • Production method of high-plasticity steel wire rod for welding
  • Production method of high-plasticity steel wire rod for welding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Selection of cast slab: The mass percentage of cast slab is C: 0.08%, Si: 0.15%, Mn: 1.60%, P: 0.012%, S: 0.003%, O: 0.0025%, N: 0.007%, Mo: 0.30%, Ni: 0.20%, Ti: 0.04%, B: 0.004%, the rest is iron and unavoidable impurities;

[0027] (2) Heating: The billet enters the heating furnace for heating. The heating furnace adopts a walking beam heating furnace. The temperature of the preheating section is 500°C, the temperature of the heating section is 1010°C, the temperature of the soaking section is 1080°C, and the heating time is 90min. ;

[0028] (3) Descaling: descaling treatment of cast slabs after being released from the furnace, the pressure of descaling water is 13MPa;

[0029] (4) Rough rolling: the cast slab after descaling is rough rolled to obtain a steel bar, the rough rolling start rolling temperature is 950°C, and 27 rolling mills are used for rough rolling;

[0030] (5) Pre-finish rolling: After rough rolling, the steel bar is pre-finish-rolled, and 27...

Embodiment 2

[0038] (1) Selection of cast slab: The mass percentage of cast slab is C: 0.05%, Si: 0.05%, Mn: 1.65%, P: 0.01%, S: 0.002%, O: 0.0015%, N: 0.006%, Mo: 0.35%, Ni: 0.25%, Ti: 0.06%, B: 0.006%, the rest is iron and unavoidable impurities;

[0039] (2) Heating: The billet enters the heating furnace for heating. The heating furnace adopts a walking beam heating furnace. The temperature of the preheating section is 600°C, the temperature of the heating section is 1100°C, the temperature of the soaking section is 1160°C, and the heating time is 120min ;

[0040] (3) Descaling: descaling treatment of cast slabs after being released from the furnace, the pressure of descaling water is 15MPa;

[0041] (4) Rough rolling: rough rolling the cast slab after descaling to obtain a steel bar, adopt 27 rolling mills for rough rolling, and the rough rolling start rolling temperature is 965°C;

[0042] (5) Pre-finish rolling: After rough rolling, the steel bar is pre-finish-rolled, and 27 rolli...

Embodiment 3

[0050] (1) Selection of cast slab: The mass percentage of cast slab is C: 0.04%, Si: 0.1%, Mn: 1.61%, P: 0.008%, S: 0.001%, O: 0.001%, N: 0.005%, Mo: 0.38%, Ni: 0.23%, Ti: 0.07%, B: 0.007%, the rest is iron and unavoidable impurities;

[0051] (2) Heating: The billet enters the heating furnace for heating. The heating furnace adopts a walking beam heating furnace. The temperature of the preheating section is 560°C, the temperature of the heating section is 1080°C, the temperature of the soaking section is 1100°C, and the heating time is 100min ;

[0052] (3) Descaling: descaling treatment of cast slab after being released from the furnace, the pressure of descaling water is 18MPa;

[0053] (4) Rough rolling: rough rolling the cast slab after descaling to obtain a steel bar, adopting 27 rolling mills for rough rolling, and the rough rolling starting temperature is 975°C;

[0054] (5) Pre-finish rolling: After rough rolling, the steel bar is pre-finish-rolled, and 27 rolling m...

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Abstract

The invention relates to a production method of a high-plasticity steel wire rod for welding, comprising the steps of heating, descaling, rough rolling, pre-finish rolling, finish rolling, spinning, cold control, cooling and transportation. The strength of steel for welding is reduced and the plasticity is improved through such methods as rolling temperature control, rolling mill cooling water control, air volume control and insulation measure; and the generation of bad phenomenon in the drawing machining process is effectively improved.

Description

technical field [0001] The invention belongs to the field of welding steel production, and in particular relates to a production method of high plasticity welding steel wire rod. Background technique [0002] The smelting process and rolling process of low-carbon alloy welding steel are gradually reaching a mature stage, but due to the demand for market residual value competition, the requirements for drawing processed materials are getting higher and higher. In the past, drawn materials needed to go through several annealing processes to eliminate processing stress during processing. Recently, in order to reduce processing costs, most users have canceled the annealing process and directly drawn several passes continuously before forming. In the drawing process, it is subject to severe deformation (work hardening). During the drawing process, the deformation of the surface metal is large, and the deformation of the core metal is small. When the deformation reaches a certain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/12C22C38/08C22C38/14C21D8/06
CPCC21D8/065C22C38/001C22C38/04C22C38/08C22C38/12C22C38/14
Inventor 黄海玲张贤忠胡专张渊普陈华强张欢杜方
Owner 武钢集团有限公司
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