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A kind of steel for large-scale concrete electric pole and its production method

A production method and concrete technology, which is applied in the field of steel for large-scale concrete poles and its production, can solve the problems of not being able to meet the needs of some users, improve the mechanical strength and crack resistance, save material costs, and improve yield The effect of intensity

Active Publication Date: 2021-06-08
WUHU XINXING DUCTILE IRON PIPES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing 8-12mm specification products can no longer meet the needs of some users

Method used

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  • A kind of steel for large-scale concrete electric pole and its production method
  • A kind of steel for large-scale concrete electric pole and its production method
  • A kind of steel for large-scale concrete electric pole and its production method

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Effect test

Embodiment 1

[0031] A steel for large-scale concrete electric poles, including the following components in weight percentage: the furnace number is B9214, including the following components C: 0.24%, Si0.45%, Mn1.35%, V0.018%, P0.026%, S0.015%, and the balance of Fe and unavoidable impurities.

[0032] A production method of steel for large-scale concrete poles, the specific process is: molten iron plus scrap → converter smelting → soft argon blowing at the argon blowing station behind the furnace → LF furnace refining → LF weak argon blowing operation → 180 billet continuous casting → Wire rod controlled rolling and controlled cooling process, specification φ16mm.

[0033] Converter smelting: according to the mass ratio of molten iron:scrap = 121:19 stable loading system, the total loading is 140 tons; the end point of the converter is C 0.09%; when 1 / 3 of the molten steel is tapped, the alloy is added, and the order is: recarburizer → Silicon-manganese→ferrosilicon→vanadium-nitrogen all...

Embodiment 2

[0040] A steel for large-scale concrete poles, comprising the following components in weight percent: furnace number A9207, including the following components C: 0.23%, Si0.47%, Mn1.38%, V0.017%, P0.027%, S0.020%, and the balance of Fe and unavoidable impurities.

[0041] The production method of the above-mentioned steel for large-scale concrete poles includes the following technological process: molten iron plus scrap → converter smelting → soft argon blowing at the argon blowing station after the furnace → LF furnace refining → weak argon blowing operation → continuous casting of 180 square billets → wire rod control Rolling controlled cooling process, specification φ

[0042] 16mm.

[0043] Converter smelting: according to the mass ratio molten iron:scrap = 119:20 stable loading system, the total loading is 139 tons; the end point of the converter is 0.11%; when tapping 1 / 3 of the molten steel, add the alloy, and the adding order is: recarburizer → Silicon-manganese → Fe...

Embodiment 3

[0050] A steel for large-scale concrete electric poles, including the following components in weight percentage: the furnace number is B9216, including the following components C0.24%, Si 0.43%, Mn1.42%, V 0.016%, P0.027%, S0. 024%, and the balance of Fe and unavoidable impurities.

[0051] The production method of steel for large-scale concrete poles includes the following technological process: molten iron plus scrap → converter smelting → soft argon blowing at the argon blowing station behind the furnace → LF furnace refining → weak argon blowing operation → continuous casting of 180 square billets → controlled rolling of wire rods Controlled cooling process; specification φ16mm.

[0052] Converter smelting: according to the mass ratio molten iron:scrap = 119:19 stable loading system, the total loading is 138 tons; the end point of the converter is C 0.10%; when 1 / 3 of the molten steel is tapped, the alloy is added, and the order is: recarburizer → Silicon-manganese→ferros...

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Abstract

The invention provides a steel for large-scale concrete poles and a production method thereof. %, S≤0.035%, the rest are Fe and inevitable impurities. Compared with the prior art, the present invention provides a production method of φ16mm specification electric pole coiled steel DG400, which increases the specifications of electric pole steel DG400 products and fills the blank of electric pole steel in the large-scale market. And the development of the concrete pole steel of this specification improves the force strength and crack resistance per unit area, and saves the material cost.

Description

technical field [0001] The invention belongs to the field of steel preparation, and in particular relates to a steel for large-scale concrete electric poles and a production method thereof. Background technique [0002] The steel bars of reinforced concrete poles are pre-stretched first, and form a unified whole with the concrete under the tension of the steel bars. After the concrete reaches a certain strength, the steel bars are loosened. The steel bars produce elastic shrinkage deformation, and the concrete gets precompressive stress. And when the pole is loaded with tensile load, this precompressive stress can offset part or all of the tensile force, so as to achieve the consistency of deformation between the steel bar and the concrete, and give full play to its strength. The size of the steel used for cement poles. At present, the main reinforcement on the market is generally 8-12mm rebar wire (called straight reinforcement). In addition, small-sized coiled steel bars ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/12C21C5/28C21C7/072C21D8/06
CPCC21C5/28C21C7/072C21D8/065C21D2211/005C21D2211/009C22C38/002C22C38/02C22C38/04C22C38/12Y02P10/20
Inventor 陈永峰杨伟勇陶群南王东兴左小坦黄雁赵立
Owner WUHU XINXING DUCTILE IRON PIPES