CN105525166B - A kind of anodic oxidation aluminium alloy strips and preparation method thereof - Google Patents

A kind of anodic oxidation aluminium alloy strips and preparation method thereof Download PDF

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Publication number
CN105525166B
CN105525166B CN201610081533.6A CN201610081533A CN105525166B CN 105525166 B CN105525166 B CN 105525166B CN 201610081533 A CN201610081533 A CN 201610081533A CN 105525166 B CN105525166 B CN 105525166B
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finished
aluminium alloy
anodic oxidation
alloy strips
cold rolling
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CN105525166A (en
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黄瑞银
李谢华
江钟宇
吴建新
徐始祥
张宸玮
刘旺
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Chinalco Ruimin Co Ltd
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Chinalco Ruimin Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/06Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08Alloys based on aluminium with magnesium as the next major constituent with silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/047Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent

Abstract

The invention belongs to the preparation field of aluminium and aluminium alloy sheet and strip, and in particular to a kind of anodic oxidation aluminium alloy strips and preparation method thereof.The component of aluminium alloy strips is:Cr 0.15 ~ 0.25wt%, Mg 2.5 ~ 3.5wt%, Si≤0.08wt%, Fe≤0.15wt%, Fe/Si=1 ~ 3, Cu≤0.05wt%, Mn≤0.05wt%, Ti≤0.05wt%;Surplus is aluminium.After dispensing, by cold rolling processing technology, yield strength is made and exceedes anode aluminum alloy sheets and strips highlighted after 200MPa, anode, is suitable for the appearance member of the products such as electronic apparatus, such as mobile phone and computer casing, have widened application of the aluminium alloy strips in field of electronic devices.

Description

A kind of anodic oxidation aluminium alloy strips and preparation method thereof
Technical field
The invention belongs to the preparation field of aluminium and aluminium alloy sheet and strip, and in particular to a kind of anodic oxidation aluminium alloy strips and Its preparation method.
Background technology
Aluminium and aluminium alloy sheet and strip is widely used in making the various decorations such as lighting decoration controlled, electronic product casing, casket Appearance and inside gadget.But anodic oxidation is one of " high, precision and frontier " product recognized within the industry with aluminium and aluminium alloy cold-strip, Technological requirement is high, and quality control difficulty is big.
In the prior art, usual anode strap selects 5052 or 1050 with aluminium alloy strips, but there are intensity deficiency It is partially dark with color and luster after anodic oxidation, and also there are material line defect after thin sandblasting anode.And as electronics industry is to frivolous, beautiful The growth requirement of sight, disadvantages described above constrain development of the aluminium and aluminium alloy sheet and strip in electronics industry.For this reason, the present invention passes through to changing The improvement studied point, coordinates corresponding cold rolling processing technology, produces yield strength more than the sun highlighted after 200 MPa, anode Pole aluminum alloy sheets and strips.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of anodic oxidation aluminium alloy strips and its system Preparation Method.The aluminium alloy strips yield strength is more than 200 MPa, while anode rear surface is fine and smooth, and surface brightness is splendid, can be extensive For the appearance member of the products such as electronic apparatus, such as mobile phone and computer casing.
To achieve the above object, the present invention adopts the following technical scheme that:
A kind of anodic oxidation aluminium alloy strips, its component are:Cr 0.15 ~ 0.25wt%, Mg 2.5 ~ 3.5wt%, Si≤ 0.08wt%, Fe≤0.15wt%, Fe/Si=1 ~ 3, Cu≤0.05wt%, Mn≤0.05wt%, Ti≤0.05wt%;Surplus is Al.
The anodic oxidation aluminium alloy strips, its yield strength >=200MPa.
A kind of method for preparing anodic oxidation aluminium alloy strips as described above, comprises the following steps:
1)Aluminium ingot melts by smelting furnace, after dispensing, carries out semi-continuous casting;
2)Ingot casting enters heating furnace behind sawing, milling face, and 480-580 DEG C of metal temperature, time 1-30h, then comes out of the stove Hot rolling, hot rolling finishing temperature are 250-350 DEG C, hot rolled thickness 3.0-10.0mm;
3)To finished product thickness, cold rolling total reduction >=10%, then carries out finished products for coiled material direct cold rolling after hot rolling, 150-300 DEG C of temperature, finished product;Or the coiled material after hot rolling passes through the cold rolling of 10-70%, then intermediate annealing is carried out, centre is moved back Fiery temperature is 300-500 DEG C, soaking time 30s-4h, is then cold rolled to finished product thickness, and cold rolling reduction ratio is 10 ~ 80%, finally By 150-300 DEG C of finished products, finished product.
Step 3)The surface roughness of obtained finished product is controlled within 0.3 μm of Ra.
The beneficial effects of the present invention are:
1)The present invention is coordinated corresponding cold rolling processing technology, is produced by the improvement to aluminium alloy strips chemical composition Yield strength is more than 200 MPa, the anode aluminum alloy sheets and strips that are highlighted after anode;
2)For the aluminium alloy strips of the present invention after anodic oxidation, surface color is fine and smooth bright, and yield strength is high, can It is widely used in the appearance member of the products such as electronic apparatus, such as mobile phone and computer casing.
Embodiment
The present invention further illustrates the present invention with the following example, but protection scope of the present invention is not limited to following reality Apply example.
Embodiment 1
A kind of anodic oxidation aluminium alloy strips, its component are:Cr 0.15wt%, Mg 2.5wt%, Si 0.08wt%, Fe 0.15wt%, Cu 0.05wt%, Mn 0.05wt%, Ti 0.05wt%;Surplus is Al.
Preparation method, comprises the following steps:
1)Aluminium ingot melts by smelting furnace, after dispensing, carries out semi-continuous casting;
2)Ingot casting enters heating furnace, 520 DEG C, time 15h of metal temperature, hot rolling of then coming out of the stove, heat behind sawing, milling face It is 300 DEG C to roll finishing temperature, hot rolled thickness 6.0mm;
3)Coiled material direct cold rolling after hot rolling is to finished product thickness, and cold rolling total reduction 20%, then carries out finished products, temperature 200 DEG C of degree, finished product.
The yield strength of obtained aluminium alloy strips is 200 MPa, and surface roughness is 0.28 μm of Ra.
Embodiment 2
A kind of anodic oxidation aluminium alloy strips, its component are:Cr 0.25wt%, Mg 3.5wt%, Si 0.05wt%, Fe 0.15wt%, Cu 0.02wt%, Mn 0.03wt%, Ti 0.03wt%;Surplus is Al.
Preparation method, comprises the following steps:
1)Aluminium ingot melts by smelting furnace, after dispensing, carries out semi-continuous casting;
2)Ingot casting enters heating furnace, 580 DEG C, time 1h of metal temperature, hot rolling of then coming out of the stove, heat behind sawing, milling face It is 250 DEG C to roll finishing temperature, hot rolled thickness 10.0mm;
3)Coiled material after hot rolling passes through 40% cold rolling, then carries out intermediate annealing, and intermediate anneal temperature is 400 DEG C, during insulation Between be 2h, be then cold rolled to finished product thickness, cold rolling reduction ratio is 20%, finally by 200 DEG C of finished products, finished product.
The yield strength of obtained aluminium alloy strips is 210 MPa, and surface roughness is 0.23 μm of Ra.
Embodiment 3
A kind of anodic oxidation aluminium alloy strips, its component are:Cr 0.20wt%, Mg 3.0wt%, Si 0.075wt%, Fe 0.15wt%, Cu 0.04wt%, Mn 0.04wt%, Ti 0.04wt%;Surplus is Al.
Preparation method, comprises the following steps:
1)Aluminium ingot melts by smelting furnace, after dispensing, carries out semi-continuous casting;
2)Ingot casting enters heating furnace, 480 DEG C, time 30h of metal temperature, hot rolling of then coming out of the stove, heat behind sawing, milling face It is 350 DEG C to roll finishing temperature, hot rolled thickness 3.0mm;
3)Coiled material direct cold rolling after hot rolling is to finished product thickness, and cold rolling total reduction 50%, then carries out finished products, temperature 150 DEG C of degree, finished product.
The yield strength of obtained aluminium alloy strips is 200 MPa, and surface roughness is 0.25 μm of Ra.
The anodic oxidation aluminium that the present invention designs is compared with tradition 5052, it is in chemical composition and cold rolling processing technology Improved, make same thickness product with identical close elongation percentage(Punching performance)While, the surrender with superelevation is strong Degree, while anode rear surface is fine and smooth, its surface brightness is splendid.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with Modification, should all belong to the covering scope of the present invention.

Claims (3)

  1. A kind of 1. anodic oxidation aluminium alloy strips, it is characterised in that:Its component is:Cr 0 .15wt%, Mg 2 .5wt%, Si 0 .05wt% of 0 .08wt%, Fe 0 .15wt%, Cu 0 .05wt%, Mn 0 .05wt%, Ti;Surplus is Al;
    Or its component is:Cr 0 .25wt%, Mg 3 .5wt%, Si 0 .05wt%, Fe 0 .02wt% of 0 .15wt%, Cu, 0 .03wt% of Mn 0 .03wt%, Ti;Surplus is Al;
    Or its component is::Cr 0 .20wt%, Mg 3 .0wt%, Si 0 .075wt%, Fe 0 .15wt%, Cu 0 .04wt%, 0 .04wt% of 0 .04wt% of Mn, Ti;Surplus is Al.
  2. A kind of 2. method for preparing anodic oxidation aluminium alloy strips as claimed in claim 1, it is characterised in that:Including following Step:
    1)Aluminium ingot melts by smelting furnace, after dispensing, carries out semi-continuous casting;
    2)Ingot casting enters heating furnace behind sawing, milling face, 480-580 DEG C of metal temperature, time 1-30h, hot rolling of then coming out of the stove, Hot rolling finishing temperature is 250-350 DEG C, and hot rolled thickness is 3 .0-10 .0mm;
    3)For coiled material direct cold rolling after hot rolling to finished product thickness, cold rolling total reduction >=10%, then carries out finished products, temperature 150-300 DEG C, finished product;Or the coiled material after hot rolling passes through the cold rolling of 10-70%, then intermediate annealing is carried out, intermediate annealing temperature Spend for 300-500 DEG C, soaking time 30s-4h, be then cold rolled to finished product thickness, cold rolling reduction ratio is 10 ~ 80%, is finally passed through 150-300 DEG C of finished products, finished product.
  3. 3. preparation method according to claim 2, it is characterised in that:Step 3)The surface roughness control of obtained finished product System is within 0 .3 μm of Ra.
CN201610081533.6A 2016-02-05 2016-02-05 A kind of anodic oxidation aluminium alloy strips and preparation method thereof Active CN105525166B (en)

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CN106086532A (en) * 2016-06-20 2016-11-09 中铝瑞闽股份有限公司 A kind of capacitor case aluminium alloy strips and preparation method thereof
CN106591645B (en) * 2016-11-30 2018-04-27 中铝瑞闽股份有限公司 A kind of packaging for foodstuff irregular shaped can aluminium alloy strips and preparation method thereof
CN106636775A (en) * 2016-12-20 2017-05-10 中铝瑞闽股份有限公司 Aluminum alloy strip used for powder battery shell and preparation method of aluminum alloy strip
CN107326311A (en) * 2017-06-07 2017-11-07 中铝瑞闽股份有限公司 A kind of control method of reduction Al Mg line aluminium alloy Strip yield tensile ratios
CN107794470B (en) * 2017-11-18 2019-04-05 中铝瑞闽股份有限公司 After a kind of anodization without heterochromatic defect 5 be aluminium plate cold rolling process
CN109161741B (en) * 2018-11-27 2020-12-25 无锡市铝泰新材料股份有限公司 Aluminum substrate with excellent high-temperature softening resistance and preparation method thereof
CN110756581A (en) * 2019-10-24 2020-02-07 中铝瑞闽股份有限公司 Hot rolling process of high-strength aluminum alloy for anodic oxidation
CN112122383A (en) * 2020-08-26 2020-12-25 中铝瑞闽股份有限公司 Preparation method of aluminum alloy plate strip for anodic oxidation of roughened surface

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CN101476067A (en) * 2009-02-17 2009-07-08 中铝河南铝业有限公司 Aluminum alloy strip assembly for umbrella framework and machining technique thereof
CN104294112B (en) * 2013-07-16 2016-08-10 大力神铝业股份有限公司 A kind of manufacture method of Airline meal box alloy foil
CN104357771B (en) * 2014-12-09 2017-02-22 郑州大学 Cold rolling thermal treatment process for improving bending property of aluminum magnesium alloy

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