Novel weathering resistant steel microalloying compound core-spun yarn

A technology of microalloying and weathering steel, applied in the field of cored wire, can solve the problems of high Cu content, limited corrosion resistance and high cost, and achieve the effect of improving strength, excellent comprehensive performance and improving the quality of steel

Inactive Publication Date: 2010-11-03
HUBEI KMK WELDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a new type of weathering steel microalloyed composite cored wire, which is used to solve the existing technical problems of weathering steel with high Cu content, limited corrosion resistance, and high cost.

Method used

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  • Novel weathering resistant steel microalloying compound core-spun yarn
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  • Novel weathering resistant steel microalloying compound core-spun yarn

Examples

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Embodiment 1

[0023] Example 1: The particle size of the powdery inner core of the cored wire is 1-1.5 mm, and the powdery inner core is covered with a carbon steel sheath to make a cored wire with a diameter of 13 mm. Among them, the carbon steel outer skin adopts 08A2 steel strip with a thickness of 0.3-0.4 mm, and the element components and mass percentages in the powdery inner core are: Ca: 15%, Mg: 0.7%, Si: 44.5%, Ba: 1.5% %, rare earth metals: 1.5%, Zr: 2.5%, Ti: 1.8%, B: 0.3%, Mo: 0.8%, Mn: 0.3%, Nb: 0.8%, V: 0.5%, the balance is iron and unavoidable of impurities.

Embodiment 2

[0024] Embodiment 2: The particle size of the powdery inner core of the cored wire is 1-1.5 mm, and the powdery inner core is covered with a carbon steel sheath to make a cored wire with a diameter of 13 mm. Wherein the carbon steel outer skin adopts a low-carbon steel strip with a thickness of 0.3-0.4 mm, and the element components and mass percentages in the powdery inner core are: Ca: 20%, Mg: 0.5%, Si: 38%, Ba : 1.2%, rare earth metals: 1.9%, Zr: 3.2%, Ti: 1.6%, B: 0.5%, Mo: 0.9%, Mn: 0.5%, Nb: 0.9%, V: 0.6%, and the balance is iron and unavoidable impurities.

Embodiment 3

[0025] Embodiment 3: The particle size of the powdery inner core of the cored wire is 1-1.5 mm, and the powdery inner core is covered with a carbon steel sheath to make a cored wire with a diameter of 13 mm. Among them, the carbon steel outer skin adopts 08A2 steel strip with a thickness of 0.3-0.4 mm, and the elemental components and mass percentages in the powdery inner core are: Ca: 18%, Mg: 0.6%, Si: 35%, Ba: 1.0 %, rare earth metals: 3%, Zr: 4.0%, Ti: 1.2%, B: 0.7%, Mo: 1.2%, 0.8%, V: 0.9%, and the balance is iron and unavoidable impurities.

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Abstract

The invention discloses a novel weathering resistant steel microalloying compound core-spun yarn comprising a steel sheath and a powdery inner core, wherein the powdery inner core is composed of the following chemical ingredients in percentage by weight: 20% of Ca, 0.5% of Mg, 38% of Si, 1.2% of Ba, 1.9% of rare-earth metal, 3.2% of Zr, 1.6% of Ti, 0.5% of B, 0.9% of Mo, 0.5% of Mn, 0.9% of Nb, 0.6% of V and the balance of Fe and inevitable impurity. The invention can obviously refine steel microstructure, improves the decay resistance of steel and lowers C, P and S content in steel by reasonably designing the chemical ingredients; and meanwhile the invention can reduce the amount of parts of alloy elements in steel so as to lower cost.

Description

technical field [0001] The invention relates to a cored wire, in particular to a novel weather-resistant steel microalloyed composite cored wire. Background technique [0002] With the rapid development of my country's economic construction, all walks of life need a large amount of low-alloy high-strength steel. However, due to my country's vast territory and large differences in climatic conditions, steel structures such as railways, vehicles, bridges, towers, and pipelines exposed to the atmosphere for a long time are particularly prone to corrosion. Due to corrosion, 10-20% of steel structures in my country become waste every year, which brings huge economic losses to the society. Although the industry has developed a series of corrosion-resistant steel, such as 09CuPCrNi weathering steel and so on. However, the existing weathering steels generally have many technical problems such as limited corrosion resistance, high Cu content (too high Cu element will easily cause h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/04C21C7/06
Inventor 樊兴龙李志远
Owner HUBEI KMK WELDING MATERIALS
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