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Preparation method of aluminum alloy coiled material for high pressure helical weld pipe

A technology of spiral welded pipe and aluminum alloy, which is applied in the field of aluminum alloy manufacturing, can solve the problems that the strength and toughness cannot match the use requirements at the same time, the electrical conductivity of the spiral welded pipe cannot be satisfied, and the welding defects of the spiral welded pipe, etc., to achieve guaranteed strength and mechanical properties. The effect of ensuring crimp solderability

Inactive Publication Date: 2019-08-30
TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, in order to solve the problem that the electrical conductivity of the spiral welded pipe produced by the prior art cannot meet the requirements of high-voltage cables, the strength and toughness cannot match the requirements of use at the same time, and the spiral welded pipe after crimping and welding is prone to welding defects. Preparation method of aluminum alloy coil for high-pressure spiral welded pipe

Method used

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  • Preparation method of aluminum alloy coiled material for high pressure helical weld pipe
  • Preparation method of aluminum alloy coiled material for high pressure helical weld pipe

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Effect test

Embodiment 1

[0026] A method for preparing aluminum alloy coils for high-pressure spiral welded pipes, comprising the following steps:

[0027] A. Ingredients: Calculate the amount of each aluminum alloy raw material used for the preparation of high-pressure spiral welded pipes and prepare the aluminum alloy raw material according to the ratio. The ratio of the mass percentage of each element of the aluminum alloy raw material is as follows:

[0028] element Si Fe Cu mn Mg Cr Zn Ti Impurities Al content 0.046 0.109 0.002 0.004 2.603 0.024 0.006 0.009 0.15 margin

[0029] B. Melting and casting: Add the prepared aluminum alloy raw materials into the smelting furnace and mix them evenly to melt them into liquid aluminum alloys. After standing still, refining, slag removal, online degassing, and filtering processes, the liquid aluminum alloys are melted and cast into aluminum alloys. For ingot casting, the melting temperature is 730-750°C, the re...

Embodiment 2

[0036] A method for preparing aluminum alloy coils for high-pressure spiral welded pipes, comprising the following steps:

[0037] A. Ingredients: Calculate the amount of each aluminum alloy raw material used for the preparation of high-pressure spiral welded pipes and prepare the aluminum alloy raw material according to the ratio. The ratio of the mass percentage of each element of the aluminum alloy raw material is as follows:

[0038] element Si Fe Cu mn Mg Cr Zn Ti Impurities Al content 0.036 0.119 0.003 0.001 2.613 0.023 0.006 0.009 0.15 margin

[0039] B. Melting and casting: Add the prepared aluminum alloy raw materials into the smelting furnace and mix them evenly to melt them into liquid aluminum alloys. After standing still, refining, slag removal, online degassing, and filtering processes, the liquid aluminum alloys are melted and cast into aluminum alloys. For ingot casting, the melting temperature is 730-750°C, the re...

Embodiment 3

[0046] A method for preparing aluminum alloy coils for high-pressure spiral welded pipes, comprising the following steps:

[0047] A. Ingredients: Calculate the amount of each aluminum alloy raw material used for the preparation of high-pressure spiral welded pipes and prepare the aluminum alloy raw material according to the ratio. The ratio of the mass percentage of each element of the aluminum alloy raw material is as follows:

[0048] element Si Fe Cu mn Mg Cr Zn Ti Impurities Al content 0.046 0.089 0.002 0.004 2.643 0.025 0.006 0.009 0.15 margin

[0049] B. Melting and casting: Add the prepared aluminum alloy raw materials into the smelting furnace and mix them evenly to melt them into liquid aluminum alloys. After standing still, refining, slag removal, online degassing, and filtering processes, the liquid aluminum alloys are melted and cast into aluminum alloys. For ingot casting, the melting temperature is 730-750°C, the re...

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Abstract

The invention belongs to the technical field of aluminum alloy manufacturing and relates to a preparation method of an aluminum alloy coiled material for a high pressure helical weld pipe. The preparation method comprises the following steps: proportioning; casting; homogenizing; saw cutting and milling; cast ingot heating; thermal rough rolling; and thermal finish rolling. The aluminum alloy coiled material comprises the following alloy components in percent by weight: less than or equal to 0.10% of Si, less than or equal to 0.12% of Fe, less than or equal to 0.03% of Cu, less than or equal to 0.05% of Mn, 2.60-2.65% of Mg, less than or equal to 0.03% of Cr, less than or equal to 0.10% of Zn, less than or equal to 0.01% of Ti, less than or equal to 0.05% of single impurities, less than orequal to 0.15% of total components, and the balance Al. The preparation method comprises the following steps: carrying out finish rolling on an intermediate blank after thermal rough milling, whereinthe finish rolling temperature is controlled at 270-290 DEG C; and then curling the blank to a coil to prepare the aluminum alloy coiled material. The conductivity of the aluminum alloy coiled material is greater than or equal to 40% IACS, the tensile strength of the aluminum alloy coiled material is greater than or equal to 210 MPa, the yield strength of the aluminum alloy coiled material is 130-150 MPa, and the ductility of the aluminum alloy coiled material is greater than 25%, and the aluminum alloy coiled material can meet the using demands of the high pressure helical weld pipe.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy manufacturing, and relates to a method for preparing aluminum alloy coils for high-pressure spiral welded pipes. Background technique [0002] High-pressure spiral welded pipes are widely used in a wide range of applications, mainly in low-temperature environments, gas insulation equipment, high-voltage transmission lines, and gas processing equipment. Due to the advantages of corrosion resistance, low density and high strength of aluminum alloy spiral welded pipes, compared with steel materials, the demand for high-voltage spiral welded pipes made of aluminum alloy has increased significantly in the field of UHV cable transmission in recent years. [0003] Conductivity is a measure of the ability of an object to conduct current. Aluminum alloys for high-voltage spiral welded pipes have important requirements for conductivity. In addition, because the working environment of spiral welded pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/08C22C1/02C22C1/06C22F1/047B21B1/22
CPCB21B1/22B21B2001/225C22C1/026C22C1/06C22C21/08C22F1/047
Inventor 杨直达马青梅郭富安刘俊涛张义董艺伟刘聪
Owner TIANJIN ZHONGWANG ALUMINUM IND CO LTD
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