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Dedicated submerged-arc welding flux for petroleum pipeline

A submerged arc flux, oil pipeline technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problems of high price, lack of mature products, etc., to improve the intergranular structure, improve comprehensive performance, The effect of improving low temperature impact toughness

Active Publication Date: 2013-02-13
TIANJIN GOLDEN BRIDGE WELDING MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, only a few welding consumable factories such as Lincoln and Kobelco have developed welding consumables with such properties in foreign countries, but the price is extremely expensive, and there is no such mature product in China

Method used

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  • Dedicated submerged-arc welding flux for petroleum pipeline
  • Dedicated submerged-arc welding flux for petroleum pipeline
  • Dedicated submerged-arc welding flux for petroleum pipeline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) The weight percentages of various raw materials in the flux powder are as follows: (%)

[0027] calcium fluoride barium fluoride Bauxite Calcined α-alumina White corundum magnesium oxide Calcium Oxide 8 8 7 10 9 8 5 silica Barium titanate Manganese ore powder ferromanganese alloy Metal nickel ferrosilicon alloy Ferro-boron alloy 0.8 0.2 28 6 2 7 1

[0028] Among them, the content of MnO in manganese ore powder is ≥62%, the content of Si in ferrosilicon alloy is ≥72%, and the content of B in ferroboron alloy is ≥15%.

[0029] (2) The binder is high modulus potassium sodium water glass, the modulus is 3.0-3.1, and the ratio of potassium to sodium is 2:1.

[0030] (3) The submerged arc welding flux was prepared according to the above components for inspection. According to the national standard GB / T 12470-2003, with the submerged arc welding wire H08MnMoTiB for oil pipelines, the chemical composition analysi...

Embodiment 2

[0036] (1) The weight percentages of various raw materials in the flux powder are as follows: (%)

[0037] calcium fluoride barium fluoride Bauxite Calcined α-alumina White corundum magnesium oxide Calcium Oxide 7 9 7 9 10 8 5 silica Barium titanate Manganese ore powder ferromanganese alloy Metal nickel ferrosilicon alloy Ferro-boron alloy 0.8 0.2 28 6 2 7 1

[0038] Among them, the content of MnO in manganese ore powder is ≥62%, the content of Si in ferrosilicon alloy is ≥72%, and the content of B in ferroboron alloy is ≥15%.

[0039] (2) The binder is high modulus potassium sodium water glass, the modulus is 3.0-3.1, and the ratio of potassium to sodium is 2:1.

[0040] (3) The submerged arc welding flux was prepared according to the above components for testing. According to the national standard GB / T 12470-2003, with the submerged arc welding wire H08MnMoTiB for oil pipelines, the chemical composition analysis o...

Embodiment 3

[0046] (1) The weight percentages of various raw materials in the flux powder are as follows: (%)

[0047] calcium fluoride barium fluoride Bauxite Calcined α-alumina White corundum magnesium oxide Calcium Oxide 8 8 7 10 9 6 7 silica Barium titanate Manganese ore powder ferromanganese alloy Metal nickel ferrosilicon alloy Ferro-boron alloy 1 0.2 28 6 2 7 0.8

[0048] Among them, the content of MnO in manganese ore powder is ≥62%, the content of Si in ferrosilicon alloy is ≥72%, and the content of B in ferroboron alloy is ≥15%.

[0049] (2) The binder is high modulus potassium sodium water glass, the modulus is 3.0-3.1, and the ratio of potassium to sodium is 2:1.

[0050] (3) The submerged arc welding flux was prepared according to the above components for inspection. According to the national standard GB / T 12470-2003, with the submerged arc welding wire H08MnMoTiB for oil pipelines, the chemical composition analysi...

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Abstract

The invention discloses dedicated submerged-arc welding flux for a petroleum pipeline, which comprises welding flux and adhesive, wherein the welding flux comprises the following materials by weight percent: 15 to 20 percent of fluoride compound, 24 to 32 percent of aluminum sesquioxide compound, 12 to 26 percent of basic oxide compound, 0.1 to 1 percent of silicon dioxide, 0.1 to 1 percent of barium titanate, 26 to 33 percent of manganese mineral powder, 5 to 10 percent of ferromanganese, 0.1 to 4 percent of metallic nickel, 5 to 12 percent of ferrosilicon and 0.1 to 5 percent of ferroboron. Through addition of various trace alloying elements, the low-temperature impact ductility of the dedicated submerged-arc welding flux can be improved remarkably; as various fluorides capable of reducing the contents of hazardous elements such as sulfur, phosphorus and hydrogen are added, the comprehensive performance of a weld joint is improved; and as the contents of manganese and silicone are higher, the requirements on welding with larger parameters can be met, manganese and silicone which are lost through burning during a welding process can be effectively supplemented, and the mechanical property of the weld joint is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of welding materials, in particular to a special submerged arc welding flux for oil pipelines. Background technique [0002] During the 12th Five-Year Plan period, a large number of pipeline constructions started. PetroChina will build 20,000 kilometers of oil pipelines, Sinopec will build 14,000 kilometers of pipelines, and CNOOC will build 8,000 kilometers of pipelines. Welding high-strength pipeline steels urgently needs a large amount of special welding materials. Welding materials also put forward higher and higher requirements accordingly, not only higher requirements for comprehensive performance indicators, but also to meet the needs of high-speed and high-efficiency welding. At present, only a few welding consumable factories abroad, such as Lincoln and Kobelco, have developed welding consumables with such properties, but the price is extremely expensive, and there is no such mature product in China...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362
Inventor 陈洋田国锋
Owner TIANJIN GOLDEN BRIDGE WELDING MATERIALS GRP
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