CN102492879B - Preparation method of aluminum alloy thin-wall tube - Google Patents
Preparation method of aluminum alloy thin-wall tube Download PDFInfo
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- CN102492879B CN102492879B CN201110455736.4A CN201110455736A CN102492879B CN 102492879 B CN102492879 B CN 102492879B CN 201110455736 A CN201110455736 A CN 201110455736A CN 102492879 B CN102492879 B CN 102492879B
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Abstract
The invention discloses an aluminum alloy thin-wall tube and a preparation method. The invention aims to achieve the goals of reducing intercrystalline corrosion and improving a qualified rate of intercrystalline corrosion of an aluminum alloy thin-wall tube. The thin-wall tube is prepared from an aluminum alloy material which comprises, by weight, 0.2% of Si, 0.3% of Fe, 4.25 to 4.4% of Cu, 0.3 to 0.9% of Mn, 3.05 to 3.1% of Mg, 0.05% of Ni, 0.1% of Zn and 0.1% of Ti, with the balance being Al and impurities. The preparation method for the aluminum alloy thin-wall tube mainly comprises the steps of extrusion, primary annealing, rolling, secondary annealing, air-reducing and quenching; technological parameters of the method are different from technological parameters of conventional processes. According to the invention, the content of alloy elements causing intercrystalline corrosion in the aluminum alloy material of the aluminum alloy thin-wall tube is adjusted, processing processes and heat treatment standards are collocated and selected, and therefore, intercrystalline corrosion sensitivity is effectively controlled and the qualified rate of intercrystalline corrosion of the aluminum alloy thin-wall tube is improved.
Description
Technical field
The present invention relates to a kind of preparation method of aluminum alloy thin-wall tube.
Background technology
2D12 aluminium alloy is that Al-Cu-Mg is associated gold, is medium tenacity aluminium alloy, widely applies aboard.The effect of air and industrial gaseous waste through moisture, easily there is intergranular corrosion in the plane aluminium alloy of coastland flight.Because intergranular corrosion occurs in metal inside, be often not easy to be found, can cause the Sudden failure of structural part, so once occur, cause catastrophic consequence.
The technique of existing production aluminum alloy thin-wall tube mainly comprises extruding, annealing and quenching etc., but the aluminum alloy thin-wall tube intergranular corrosion qualification rate of producing according to existing processing parameter is less than 10%.
Summary of the invention
The invention provides a kind of aluminum alloy thin-wall tube and preparation method.The aluminum alloy thin-wall tube that the present invention adopts is compared with the aluminum alloy thin-wall tube of general employing, the content of the alloying element that causes intergranular corrosion in its aluminum alloy materials is adjusted to some extent, and by collocation and the selection of complete processing, heat treatment regime, effectively control intergranular corrosion Susceptibility To Intergranular Corrosion, improved aluminum alloy thin-wall tube intergranular corrosion qualification rate.
Described in a kind of thin-wall pipes, thin-wall pipes is made by aluminum alloy materials, and described aluminum alloy materials is comprised of the component of following weight percent:
Si:0.2%, Fe:0.3%, Cu:4.25%～4.4%, Mn:0.3%～0.9%, Mg:3.05%～3.1%, Ni:0.05%, Zn:0.1%, Ti:0.1%, Al and impurity: surplus.
The weight percent of described impurity is 0.1%.
A preparation method for aluminum alloy thin-wall tube, comprising:
Extruding, is specially: the aluminum alloy materials to thin-wall pipes pushes, and wherein container temperature is made as 420 ℃～440 ℃, and heating ingot casting temperature is made as 430 ℃～450 ℃;
The aluminum alloy materials of described thin-wall pipes is comprised of the component of following weight percent:
Si:0.2%, Fe:0.3%, Cu:4.25%～4.4%, Mn:0.3%～0.9%, Mg:3.05%～3.1%, Ni:0.05%, Zn:0.1%, Ti:0.1%, Al and impurity: surplus;
Annealing for the first time, is specially: the aluminum alloy materials of described thin-wall pipes after extruding put into annealing furnace, at 410 ℃ of furnace temperature, is incubated 45 minutes, then is cooled to 260 ℃ or 260 ℃ of following temperature to be not more than the speed of 30 ℃/h, and the air cooling of coming out of the stove;
Rolling, is specially: the aluminum alloy materials of the described thin-wall pipes after annealing is rolled;
Annealing for the second time, is specially: the aluminum alloy materials of the described thin-wall pipes after rolling is incubated to 45 minutes at 410 ℃, then is cooled to 260 ℃ or 260 ℃ of following temperature to be not more than the speed of 30 ℃/h, and the air cooling of coming out of the stove;
Sky draws tube reducing, is specially: the aluminum alloy materials of the described thin-wall pipes after annealing is for the second time carried out to sky and draw tube reducing;
Quench, be specially: draw the aluminum alloy materials of the described thin-wall pipes after tube reducing to quench in sky, wherein quenching temperature is made as 496 ℃, and quenching shift time is less than 14 seconds.
The weight percent that described impurity accounts for the aluminum alloy materials of described thin-wall pipes is 0.1%.
Described annealing is for the first time specially: the aluminum alloy materials of the described thin-wall pipes after extruding is put into annealing furnace, and furnace temperature was risen to 410 ℃ in 40 minutes, and be incubated 45 minutes at 410 ℃ of furnace temperature, to be not more than the speed of 30 ℃/h, be cooled to 260 ℃ or 260 ℃ of following temperature again, and the air cooling of coming out of the stove.
Described annealing is for the second time specially: the aluminum alloy materials of the described thin-wall pipes after rolling is put into annealing furnace, and furnace temperature was risen to 410 ℃ in 40 minutes, and be incubated 45 minutes at 410 ℃, to be not more than the speed of 30 ℃/h, be cooled to 260 ℃ or 260 ℃ of following temperature again, and the air cooling of coming out of the stove.
The invention has the advantages that, the aluminum alloy thin-wall tube that the present invention adopts has been adjusted the content of the alloying element that causes intergranular corrosion in aluminum alloy materials, and by collocation and the selection of complete processing, heat treatment regime, effectively controlled intergranular corrosion Susceptibility To Intergranular Corrosion, aluminum alloy thin-wall tube intergranular corrosion qualification rate has been brought up to 40%.
Accompanying drawing explanation
Fig. 1 is preparation method's schema of a kind of aluminum alloy thin-wall tube of the embodiment of the present invention.
Embodiment
The present invention is described in detail below to enumerate embodiment.
, described thin-wall pipes is made by aluminum alloy materials, and described aluminum alloy materials is comprised of the component of following weight percent:
Si:0.2%, Fe:0.3%, Cu:4.25%～4.4%, Mn:0.3%～0.9%, Mg:3.05%～3.1%, Ni:0.05%, Zn:0.1%, Ti:0.1%, Al and impurity: surplus.
Preferably, the weight percent of described impurity is 0.1%.
What described thin-wall pipes adopted is aluminum alloy materials, and this aluminum alloy materials is compared with existing aluminum alloy materials, and the content of its alloying element is adjusted to some extent, and particularly the content of Mg and Cu is adjusted to some extent.
A preparation method for aluminum alloy thin-wall tube, comprising:
101, extruding, is specially: the aluminum alloy materials to thin-wall pipes pushes, and wherein container temperature is made as 420 ℃～440 ℃, and heating ingot casting temperature is made as 430 ℃～450 ℃.
The aluminum alloy materials of described thin-wall pipes is comprised of the component of following weight percent:
Si:0.2%, Fe:0.3%, Cu:4.25%～4.4%, Mn:0.3%～0.9%, Mg:3.05%～3.1%, Ni:0.05%, Zn:0.1%, Ti:0.1%, Al and impurity: surplus.
Preferably, the weight percent of described impurity is 0.1%.
The content of Mg and Cu is that intergranular corrosion is had to considerable influence, and the content of above-mentioned Mg and Cu is conducive to control intergranular corrosion.
102, annealing for the first time, is specially: the aluminum alloy materials of the described thin-wall pipes after extruding put into annealing furnace, at 410 ℃, is incubated 45 minutes, then is cooled to 260 ℃ or 260 ℃ of following temperature to be not more than the speed of 30 ℃/h, and the air cooling of coming out of the stove.
For example, the aluminum alloy materials of described thin-wall pipes is cooled to 260 ℃, can carries out more efficiently subsequent technique.Certainly, also the aluminum alloy materials cool to room temperature of described thin-wall pipes can be taken out again.
103, rolling, is specially: the aluminum alloy materials of the described thin-wall pipes after annealing is rolled.
104, annealing for the second time, is specially: the aluminum alloy materials of the described thin-wall pipes after rolling is incubated to 45 minutes at 410 ℃, then is cooled to 260 ℃ or 260 ℃ of following temperature to be not more than the speed of 30 ℃/h, and the air cooling of coming out of the stove.
105, sky draws tube reducing, is specially: the aluminum alloy materials of the described thin-wall pipes after annealing is for the second time carried out to sky and draw tube reducing.
106, quench, be specially: draw the aluminum alloy materials of the described thin-wall pipes after tube reducing to quench in sky, wherein quenching temperature is made as 496 ℃, and quenching shift time is less than 14 seconds.
Cooling in the aluminum alloy materials of described thin-wall pipes being taken out from quenching furnance, should in 14 seconds, the aluminum alloy materials of described thin-wall pipes being transferred to tank, quenching shift time is shorter, and the performance of material is better.In addition, according to the wall thickness of the aluminum alloy materials of described thin-wall pipes, regulate Quenching Soaking Time, soaking time parameter is consistent with the time parameter in the existing quenching system of preparing aluminum alloy materials technique, repeats no more here.
The aluminum alloy materials of the described thin-wall pipes after quenching is carried out to whole footpath, aligns, is cut into product.
Preferably, described annealing is for the first time specially: the aluminum alloy materials of the described thin-wall pipes after extruding is put into annealing furnace, and furnace temperature was risen to 410 ℃ in 40 minutes, and be incubated 45 minutes at 410 ℃ of furnace temperature, to be not more than the speed of 30 ℃/h, be cooled to 260 ℃ or 260 ℃ of following temperature again, and the air cooling of coming out of the stove.
Certainly, also the aluminum alloy materials cool to room temperature of described thin-wall pipes can be taken out to air cooling again.
Preferably, described annealing is for the second time specially: the aluminum alloy materials of the described thin-wall pipes after rolling is put into annealing furnace, and furnace temperature was risen to 410 ℃ in 40 minutes, and be incubated 45 minutes at 410 ℃, to be not more than the speed of 30 ℃/h, be cooled to 260 ℃ or 260 ℃ of following temperature again, and the air cooling of coming out of the stove.
Certainly, also the aluminum alloy materials cool to room temperature of described thin-wall pipes can be taken out to air cooling again.
The aluminum alloy thin-wall tube that the present invention adopts has been adjusted the content of the alloying element that causes intergranular corrosion in aluminum alloy materials, and by technique provided by the invention, effectively controlled intergranular corrosion Susceptibility To Intergranular Corrosion, aluminum alloy thin-wall tube intergranular corrosion qualification rate has been brought up to 40%.
Being described in detail a kind of aluminum alloy thin-wall tube provided by the present invention and preparation method above, for one of ordinary skill in the art, thought according to the embodiment of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (2)
1. a preparation method for aluminum alloy thin-wall tube, is characterized in that, comprising:
Extruding, is specially: the aluminum alloy materials to thin-wall pipes pushes, and wherein container temperature is made as 420 ℃～440 ℃, and heating ingot casting temperature is made as 430 ℃～450 ℃;
The aluminum alloy materials of described thin-wall pipes is comprised of the component of following weight percent:
Si:0.2%, Fe:0.3%, Cu:4.25%～4.4%, Mn:0.3%～0.9%, Mg:3.05%～3.1%, Ni:0.05%, Zn:0.1%, Ti:0.1%, Al and impurity: surplus;
Annealing for the first time, be specially: the aluminum alloy materials of the described thin-wall pipes after extruding is put into annealing furnace, in 40 minutes, furnace temperature is risen to 410 ℃, and be incubated 45 minutes at 410 ℃ of furnace temperature, to be not more than the speed of 30 ℃/h, be cooled to 260 ℃ or 260 ℃ of following temperature again, and the air cooling of coming out of the stove;
Rolling, is specially: the aluminum alloy materials of the described thin-wall pipes after annealing is rolled;
Annealing for the second time, be specially: the aluminum alloy materials of the described thin-wall pipes after rolling is put into annealing furnace, in 40 minutes, furnace temperature is risen to 410 ℃, and be incubated 45 minutes at 410 ℃, to be not more than the speed of 30 ℃/h, be cooled to 260 ℃ or 260 ℃ of following temperature again, and the air cooling of coming out of the stove;
Sky draws tube reducing, is specially: the aluminum alloy materials of the described thin-wall pipes after annealing is for the second time carried out to sky and draw tube reducing;
Quench, be specially: draw the aluminum alloy materials of the described thin-wall pipes after tube reducing to quench in sky, wherein quenching temperature is made as 496 ℃, and quenching shift time is less than 14 seconds.
2. the preparation method of aluminum alloy thin-wall tube according to claim 1, is characterized in that, the weight percent that described impurity accounts for the aluminum alloy materials of described thin-wall pipes is 0.1%.
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| CN201110455736.4A CN102492879B (en) | 2011-12-30 | 2011-12-30 | Preparation method of aluminum alloy thin-wall tube |
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| CN201110455736.4A CN102492879B (en) | 2011-12-30 | 2011-12-30 | Preparation method of aluminum alloy thin-wall tube |
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| CN102492879B true CN102492879B (en) | 2014-02-12 |
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| CN103470019A (en) * | 2013-09-29 | 2013-12-25 | 东北轻合金有限责任公司 | Manufacturing method of aluminum alloy tube for quickly installed mobile scaffold |
| CN104668896A (en) * | 2013-12-03 | 2015-06-03 | 上海小荷展示器材有限公司 | Aluminum alloy contracted pipe marble fixed display stand and manufacturing method thereof |
| CN108004443B (en) * | 2017-12-27 | 2019-10-11 | 东北轻合金有限责任公司 | A kind of manufacturing method of aviation alloyed aluminium thin-wallconduit |
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| GB1396216A (en) * | 1972-05-04 | 1975-06-04 | Metal Leve Sa | Surface hardening of aluminum alloys |
| US4216016A (en) * | 1977-06-29 | 1980-08-05 | Swiss Aluminium Ltd. | Filler metal for welding aluminum alloys |
| US6544358B1 (en) * | 1996-12-04 | 2003-04-08 | Alcan International Limited | A1 alloy and method |
| CN1936050A (en) * | 2006-10-18 | 2007-03-28 | 东华大学 | Fine grained aluminium alloy and its preparing method |
| CN101086050A (en) * | 2006-06-06 | 2007-12-12 | 上虞市东轻特种铝材厂 | Aluminum alloy pipe |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1695883A (en) * | 2005-05-20 | 2005-11-16 | 东北轻合金有限责任公司 | Method for manufacturing tubular products made from aluminium alloy in pneumatic tool |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1396216A (en) * | 1972-05-04 | 1975-06-04 | Metal Leve Sa | Surface hardening of aluminum alloys |
| US4216016A (en) * | 1977-06-29 | 1980-08-05 | Swiss Aluminium Ltd. | Filler metal for welding aluminum alloys |
| US6544358B1 (en) * | 1996-12-04 | 2003-04-08 | Alcan International Limited | A1 alloy and method |
| CN101086050A (en) * | 2006-06-06 | 2007-12-12 | 上虞市东轻特种铝材厂 | Aluminum alloy pipe |
| CN1936050A (en) * | 2006-10-18 | 2007-03-28 | 东华大学 | Fine grained aluminium alloy and its preparing method |
Non-Patent Citations (2)
| Title |
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| 2D12铝合金腐蚀性能研究;孙志华 等;《航空材料学报》;20060630;第26卷(第3期);第297-298页 * |
| 孙志华 等.2D12铝合金腐蚀性能研究.《航空材料学报》.2006,第26卷(第3期),第297-298页. |
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