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A kind of 3005mod aluminum alloy long-life flat pipe material and its manufacturing method

A manufacturing method and aluminum alloy technology, which is applied in the field of aluminum alloy rolling, can solve the problem of small space for thickness reduction and achieve the effect of delaying failure speed and reducing cost

Active Publication Date: 2021-06-11
JIANGSU DINGSHENG NEW MATERIAL JOINT STOCK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the problem that the above traditional hot-rolled composite flat tube material has less space for thickness reduction under the premise of ensuring high strength and corrosion resistance, the purpose of the present invention is to provide a more economical, hot-rolled composite tube material with the same thickness. 3005Mod long-life flat tube material with relatively high yield strength after brazing and long-life corrosion resistance characteristics and its manufacturing method

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  • A kind of 3005mod aluminum alloy long-life flat pipe material and its manufacturing method

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Experimental program
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Effect test

Embodiment 1

[0028] The embodiment of the present invention prepares the steps of 3005Mod aluminum alloy long-life flat tube material as follows:

[0029] (1) According to Fe 0.41%, Si 0.22%, Cu 0.25%, Mn 1.15%, Mg 0.18%, Zn 0.09%, Ti0.11%, Cr 0.07%, and the rest is the chemical composition ratio of aluminum to prepare aluminum alloy raw materials, Melting the aluminum alloy raw material and then standing still;

[0030] (2) After smelting, it undergoes grain refining treatment, degassing and filtering, and obtains a billet with a thickness of 7.18mm by continuous casting and rolling. During casting and rolling production, the temperature of the degassing box is controlled at 720°C, and the air flow rate is 1.1m3 / h. The rotor speed is 235rpm;

[0031] (3) The casting and rolling billet is rough rolled to the middle thickness through two passes, pay attention to oil control, and the rolling pass is 7.18→5.3→4.2mm;

[0032] (4) Annealing the 4.2mm intermediate thickness billet into the ann...

Embodiment 2

[0044] The embodiment of the present invention prepares the steps of 3005Mod aluminum alloy long-life flat tube material as follows:

[0045] (1) According to the ratio of Fe 0.52%, Si 0.25%, Cu 0.27%, Mn 1.3%, Mg 0.22%, Zn 0.02%, Ti0.07%, Cr 0.08%, and the rest are aluminum alloy raw materials, the aluminum Alloy raw materials are smelted and then left to stand;

[0046] (2) After smelting, it undergoes grain refining treatment, degassing and filtering, and obtains a billet with a thickness of 7.06mm by continuous casting and rolling. During casting and rolling production, the temperature of the degassing box is controlled at 722°C, and the air flow rate is 1.1m3 / h. The rotor speed is 235rpm;

[0047] (3) The casting and rolling billet is rough rolled to the middle thickness through two passes, pay attention to oil control, and the rolling pass is 7.06→5.3→4.2mm;

[0048] (4) Anneal the 4.2mm intermediate thickness billet into the annealing furnace, and protect it with nitrog...

Embodiment 3

[0057] The embodiment of the present invention prepares the steps of 3005Mod aluminum alloy long-life flat tube material as follows:

[0058] (1) According to the proportion of Fe 0.31%, Si 0.29%, Cu 0.16%, Mn 1.15%, Mg 0.54%, Ti 0.05%, Cr0.11%, and the rest is aluminum, the aluminum alloy raw materials are prepared, and the aluminum alloy raw materials are processed smelt, stand still;

[0059] Other steps are similar with embodiment 1, embodiment 2.

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Abstract

The invention discloses a 3005Mod aluminum alloy long-life flat tube material, which is composed of the following components in mass percentage: Fe 0.3-0.6%, Si 0.1-0.3%, Cu 0.15-0.35%, Mn 1.05-1.55%, Mg 0.15% ~0.55%, Zn<0.25%, Ti 0.05~0.2%, Cr 0.03~0.15%, and the rest is Al. The invention also discloses a manufacturing method of the 3005Mod aluminum alloy long-life flat tube material. The method is to firstly produce 3005 cast-rolled billet coils by continuous casting, and then produce finished products through rough rolling, intermediate annealing, intermediate rolling and edge trimming, pre-finished annealing, finished rolling and slitting processes. Compared with traditional hot-rolled materials, it not only shortens the process, but also is green and low energy consumption. The cooling intensity of the casting and rolling process is much higher than that of semi-continuous casting and rolling, which increases the solid solution content of alloy elements and improves the material strength. The finished material is brazed The post-yield strength is higher than 65MPa. After welding, the material is subjected to SWAAT salt spray corrosion test, and the penetration time exceeds 25 days, which has the characteristics of long-life corrosion resistance.

Description

technical field [0001] The invention relates to the processing technology of aluminum alloy materials, in particular to a 3005Mod aluminum alloy long-life flat tube material and a manufacturing method thereof, belonging to the field of aluminum alloy rolling. Background technique [0002] With the development of lightweight automobiles, the requirements for flat tube materials for brazing heat exchange and high-frequency welding are increasing day by day, which is manifested in the continuous thinning of flat tubes while still requiring them to maintain high strength and better corrosion resistance. At present, manufacturers have tried to reduce the thickness to less than 0.2mm. Due to the requirements of end product pressure burst test, pressure cycle pulse test and corrosion resistance test, it is necessary to ensure that the yield strength of raw materials after welding is not less than 55MPa and SWAAT salt spray corrosion test The corrosion penetration time is not less t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/00C22C1/02C22F1/04
CPCC22C1/026C22C21/00C22F1/04
Inventor 田国建刘前换胡刘飞史明飞吴保剑王毓玮
Owner JIANGSU DINGSHENG NEW MATERIAL JOINT STOCK CO LTD