CN101798646A - Aluminum alloy material and manufacturing method for dual-zero aluminium foils - Google Patents

Abstract

The invention belongs to an aluminum alloy material and manufacture technology of aluminum foils, in particular to an aluminum alloy material and a manufacturing method for dual-zero aluminium foils. The aluminum alloy material comprises the following components in percentage by weight: 0.2 to 0.35 percent of Si, 0.70 to 0.90 percent of Fe, 0.10 percent of Cu, 0.05 percent of Mn, 0.05 percent of Mg, 0.05 percent of Cr, 0.10 percent of Zn, 0.05 percent of Ti, and the balance of Al; and the components are smelted into an alloy. The manufacturing method orderly comprises the following steps: smelting the components into the alloy; carrying out casting and rolling on the alloy; carrying out cold rolling, intermediate annealing and second cold rolling on the rolled alloy; carrying out aluminum foil rolling; and carrying out final annealing on the finished product. The dual-zero aluminium foil product prepared from the materials by the method integrates the respective advantages of an alloy 1235 and an alloy 8011, has a few pinhole, high surface quality and good rolling stability, and can effectively improve the production efficiency and finished product ratio. The finished product quality and the rolling performance can be comparable with those of the hot-rolled aluminum-foil sheet.

Description

The manufacture method of aluminum alloy materials and double-zero aluminum foil

Technical field

The invention belongs to the manufacturing technology of aluminum alloy materials and aluminium foil, relate to the manufacture method of a kind of aluminum alloy materials and double-zero aluminum foil.

Background technology

The used in the market aluminium alloy of producing following two zero paper tinsels of thickness 0.01mm is generally 1235 and 8011 alloys.Advantages such as it is good to have surface quality with two zero paper tinsels of 1235 alloy production, and the aluminium foil pinhole number is few, but because alloy content is lower, intensity is soft partially, causes rolling performance poor, causes problems such as production efficiency and yield rate are low; And when adopting two zero paper tinsel of 8011 alloy production, though intensity is higher, rolling stability is good, because this alloy self-characteristic tends to occur the problem that pinhole number exceeds standard, influences the use of aluminium foil.

Summary of the invention

Technical problem to be solved by this invention is, a kind of high aluminum alloy materials of rolling double-zero aluminum foil, rolling aluminium foil good product quality, Rolling Production efficient height, yield rate and manufacture method of double-zero aluminum foil of can be used for is provided.

The composition of aluminum alloy materials of the present invention and weight percent are: Si 0.2～0.35%, Fe 0.70～0.90%, Cu 0.10%, Mn 0.05%, Mg 0.05%, Cr 0.05%, Zn 0.10%, Ti 0.05%, Al surplus, each composition melting is an alloy.

Double-zero aluminum foil manufacture method of the present invention is passed through following steps successively:

A. melting is carried out melting with the composition of aforementioned proportion, leads furnace temperature and is controlled in 750 ± 5 ℃ of scopes;

B. casting, the casting finished product thickness is controlled at 7.2 ± 0.3mm, for follow-up rolling process distributes rational rolling pass and arranges suitable annealing thickness to prepare;

C. cold rolling, process annealing, secondary cold-rolling are cold-rolled to 1.0～2.5mm thickness, carry out process annealing, and annealing process is: under 400～500 ℃ of conditions, be incubated 10～20 hours; Carry out secondary cold-rolling after material after annealing is come out of the stove cools off fully, change slitting when being rolled down to 0.3～0.5mm thickness and cut edge;

D. paper tinsel rolls, and the aluminium foil stock that previous step obtains is rolled down to 0.012mm through 4～5 passages, carries out pairing again and is rolled down to 0.005～0.007mm and goes out finished product;

E. finished products, finished product annealing process is: the 4～8h that anneals under 200 ℃ annealing temperature earlier, 12～20h again anneals under 300 ℃ annealing temperature.

The zero paper tinsel product in pairs that material of the present invention and method obtain has been gathered 1235 and 8011 alloys advantage separately, and not only pinhole number is few, the surface quality height, and rolling stability can effectively be enhanced productivity and yield rate simultaneously.Final product quality and rolling performance can be suitable with the rolling aluminum foil blank.

Embodiment

The composition of the embodiment of material of the present invention and weight percent are: Si 0.30%, Fe 0.80%, Cu0.10%, Mn 0.05%, Mg 0.05%, Cr 0.05%, Zn 0.10%, Ti 0.05%, Al surplus.Total impurities does not allow to surpass 0.15% of total mass in the composition, and wherein single impurity element does not allow to surpass 0.05% of total mass.

The embodiment of method of the present invention passes through following steps successively:

A. melting is carried out melting with the composition of aforementioned proportion, and melting must accomplish that degasification, slagging-off are clean, stirs full and uniform; Leading furnace temperature is controlled in 750 ± 5 ℃ of scopes; Hydrogen richness is controlled at below the 0.15ml/100gAl, adopt three grades overanxious, guarantee melt quality.

B. casting adopts the rotation air blast to carry out online degasification, filters and adopts the 30PPi+50PPi double-stage filtering, the Al-5Ti-0.2B silk that alterant must adopt Shenzhen nova to produce, and strict control alterant add-on.Select low roll speed during production, effectively eliminate and control metallurgical imperfections such as hydrogen content in the cast-rolling stock, slag inclusion, tissue looseness, and adopt big casting district and mouth roller gap, guarantee good casting surface quality.The casting finished product thickness is controlled at 7.2 ± 0.3mm, for follow-up rolling process distributes rational rolling pass and arranges suitable annealing thickness to prepare.Casting volume end face must not influential use staggered floor, lack aluminium, cold limit phenomenon; Deflector roll in the middle of the guide passage can not have wound and cause casting volume surface tear, scratch, produces good casting volume and must be placed on above the pallet, does not allow to be placed directly on the ground.

C. cold rolling, process annealing, secondary cold-rolling are cold-rolled to 1.0～2.5mm thickness, carry out process annealing, and annealing process is: under 450 ℃ of conditions, be incubated 20 hours; Carry out secondary cold-rolling after material after annealing is come out of the stove cools off fully, change slitting when being rolled down to 0.4mm thickness and cut edge.

D. paper tinsel rolls, and the aluminium foil stock that previous step obtains is rolled down to 0.012mm through 4 ~ 5 passages, carries out pairing again and is rolled down to 0.006mm and goes out finished product.

E. finished products, finished product annealing process is: the 6h that anneals under 200 ℃ annealing temperature earlier, 18h again anneals under 300 ℃ annealing temperature.

The product that the foregoing description obtains, its pinhole number can be controlled in 200/m after testing ²Below, tensile strength 80～100Mpa, unit elongation 〉=1%.

Claims (2)

1. aluminum alloy materials, it is characterized in that: its composition and weight percent are, Si 0.2～0.35%, Fe 0.70～0.90%, Cu 0.10%, Mn 0.05%, Mg 0.05%, Cr 0.05%, Zn 0.10%, Ti 0.05%, Al surplus, each composition melting is an alloy.

2. double-zero aluminum foil manufacture method is characterized in that: pass through following steps successively,

A. melting is carried out melting with the described material composition of claim 1, leads furnace temperature and is controlled in 750 ± 5 ℃ of scopes;

B. casting, the casting finished product thickness is controlled at 7.2 ± 0.3mm;

C. cold rolling, process annealing, secondary cold-rolling are cold-rolled to 1.0～2.5mm thickness, carry out process annealing, and annealing process is: under 400～500 ℃ of conditions, be incubated 10～20 hours; Carry out secondary cold-rolling after material after annealing is come out of the stove cools off fully, change slitting when being rolled down to 0.3～0.5mm thickness and cut edge;

D. paper tinsel rolls, and the aluminium foil stock that previous step obtains is rolled down to 0.012mm through 4～5 passages, carries out pairing again and is rolled down to 0.005～0.007mm and goes out finished product;

E. finished products, finished product annealing process is: the 4～8h that anneals under 200 ℃ annealing temperature earlier, 12～20h again anneals under 300 ℃ annealing temperature.