CN102409200A - Container foil material and method for manufacturing container foil - Google Patents

Abstract

The invention relates to manufacturing of an aluminum alloy material, in particular to a container foil material and a manufacturing method of a container foil. The alloy composition and weight percentage of the container foil material of the invention are as follows: 0.20 to 0.26% of Si, 0.42 to 0.50% of Fe, 0.05% of Cu, 0.15 to 0.20% of Mn, 0.01% of Mg, 0.1% of Zn, 0.04% of Ti and the balance of Al. The material provided by the invention has the advantages that on the basis of 8011 alloy, the Fe and Si contents are redistributed, and a certain Mn element is added, so that the strength of the material can be improved, and the material also has good processability and is easy to roll. After the processing by the method, the detection shows that when the thickness of the aluminum foil is 0.05-0.06 mm, the tensile strength is 120-160 Mpa, the elongation is more than or equal to 12%, the cupping is more than or equal to 5.0, the punching performance is good, and the production of various aviation tableware can be met.

Description

The method of manufacture of container foil material and container foil

Technical field

The present invention relates to the manufacturing of aluminum alloy materials, specifically is the method for manufacture of a kind of container foil material and container foil.

Background technology

The alloy that is used to produce container foil in the market is generally 3003 alloys or 8011 alloys.Container foil with 3003 alloy production; Have good punching out performance, but owing to Mn constituent content in the alloy is too high, when carrying out homogenizing annealing; Crystal grain is grown up easily; (0.03 ~ 0.08mm) time, the surface inevitably the coarse-grain striped can occur, influences client's normal use being rolled down to finished product thickness; On the other hand, because 3003 alloy self characteristics, the intensity of material is higher, and is bigger to the loss of rolling equipment and punching device, need add a large amount of copper, manganese metal simultaneously, increases the production cost of enterprise.

Tableware with 8011 alloy production is used aluminium foil, though can overcome the some shortcomings of 3003 alloys, because 8011 alloy interalloy constituent contents are lower, but performance is soft partially, is not suitable for the high speed punching out, and the punching out degree of depth is not enough, and its use range receives very big restriction.

Summary of the invention

Technical problem to be solved by this invention is, provides that a kind of strength of materials is higher, good processability, is easy to rolling and the container foil material that the punching out performance is good and the method for manufacture of container foil.

The alloy composition composition and the weight percent of container foil material of the present invention are: Si 0.20～0.26%, Fe 0.42～0.50%, Cu 0.05%, Mn 0.15～0.20%, Mg 0.01%, Zn 0.1%, Ti 0.04%, Al surplus.

The method of manufacture of container foil of the present invention is passed through following steps successively:

A. melting, casting are raw material with the alloy material of above-mentioned composition and proportioning, use the low roll casting speed in electromagnetic agitating technology melting and little casting district to carry out casting, and the sotck thinkness after the casting is 7.0 ± 0.2mm;

B. cold rolling, during cold rolling first passage, working modulus is 30～40%, and follow-up pass reduction remains on about 45～50%, when being rolled down to 0.4～0.6mm thickness through 4～5 passages, after stopping in the middle of 20～30h, changeing the slitting operation and cuts edge;

C. the material that will cut edge is rolled to finished product thickness through 4～5 passage paper tinsels, and through cutting, annealing obtains the finished product then.

Material of the present invention after Fe, Si content carried out redistributing, and has added certain Mn element on the basis of 8011 alloys, can improve the intensity of material, also has better machining property simultaneously, is easy to rolling.After method of the present invention processing, through detecting, aluminum foil thickness when 0.05～0.06mm, tensile strength 120～160Mpa, unit elongation >=12%, cupping >=5.0 possess good punching out performance, can satisfy the production of various aviations with tableware.

Embodiment

The manufacturing embodiment of container foil of the present invention is following:

1, melting

Melting must be accomplished degasification, slagging-off totally, and adopts electromagnetic agitating technology that melt is stirred fully, guarantees that composition is even; Whole fusion process temperature all must be controlled at below 770 ℃, and temperature is controlled at 750 ± 5 ℃ when leading stove; Alloy ingredient is: Si 0.25%, Fe 0.44%, Cu 0.05%, Mn 0.20%, Mg 0.01%, Zn 0.1%, Ti 0.04%, Al surplus.

2, casting

When casting is produced; Adopt the rotation air blast to carry out online degasification; 30PPi+50PPi is board-like, and the double-stage filtering mode is carried out purifying treatment to melt; Guarantee hydrogen richness≤0.15ml/100g.Al in the melt, alterant must adopt aluminium titanium boron wire Al-5Ti-0.2B silk, and according to the strict feeding speed of controlling alterant of 0.2% ratio.Riser and adopt little casting district and low roll speed when producing reducing melt the separating out of supersaturated solid solution when solidifying, and can obtain the tiny metallurgy tissue of uniform crystal particles.The casting finished product thickness is controlled at 7.0 ± 0.2mm, thinks that the annealing of subsequent handling and the reasonable arrangement of rolling pass prepare.

3, cold rolling

Must change working roll during cold rolling cogging, wipe each roller in the guide passage clearly; Aluminium volume surface does not allow the surface imperfection that elongated or discontinuity scratch, scuffing, impression etc. have feel during cogging, does not allow bright wisp, bright band, aberration; The surface purging must be clean, do not allow residual greasy dirt.During rolling first passage, working modulus guarantees between 30～40%, obtains calendering and broken to guarantee casting plate central core tissue, to obtain uniform interior tissue.Follow-up pass reduction can suitably remain on about 50%, to guarantee rolling quality.When being rolled down to 0.4～0.6mm thickness, after stopping in the middle of 20～30h, changeing the slitting operation and cut edge through 4～5 passages.

4, slitting

Must wipe each deflector roll in the guide passage clearly when slitting is cut edge, wipe each deflector roll clearly with alcohol or acetone; Guarantee that can not there be impression, sticking aluminium, scratch, scuffing in aluminium volume surface.Do not allow burr, turriform, flounce, the little broken sea of limit portion etc. during side cut, middle side cut staggered floor must be less than 2mm.

5, paper tinsel rolls

Must change working roll when paper tinsel rolls, wipe each roller in the guide passage clearly, the supporting stick surface is not all right must change supporting roll; Rolling oil product must be clean, and aluminium foil surface must purge totally when going out finished product, does not allow residual greasy dirt; The surface does not allow the surface imperfection that any influences such as elongated or discontinuity scratch, scuffing, cycle row impression, bright wisp and bright band, latent bar, informal voucher are used.After being rolled down to the thickness of customer requirement, changeing and divide cutting process to cut through 4 ~ 5 passages.

6, finished product is cut

Must wipe each deflector roll in the guide passage clearly when cutting, wipe each deflector roll clearly with alcohol or acetone; Guarantee that can not there be impression, sticking aluminium, scratch, scuffing in aluminium volume surface.Notice when cutting checking that aluminium foil surface has or not greasy dirt, the surface has smeary must not mail to annealing operation.

Do not allow burr, turriform, flounce, the little broken sea of limit portion etc. when cutting, cutting staggered floor must be less than 0.5mm.Rouleau end face after cutting must be clean, clean and tidy.Divide the rouleau that cuts when putting on the shelf, must remain with the gap about 10mm between volume and the volume, thick stick is hindered the aluminium volume when preventing to anneal.Divide the examination paper that cuts must use three high temperature foil tape seals firm, it is loose to prevent to anneal.

7, finished products

Finished products is checked supplied materials end face situation, and whether whether the inspection end socket adopts high temperature gummed tape, firm, whether bumps the volume phenomenon between the aluminium volume, whether is stained with aluminium foil on the recirculating air hood of inspection stove, has then can to advance furnace annealing by clean clearly top aluminium foil.

8, inspection and packing

Visual appearance: mainly comprise thickness deviation, width tolerance, template planeness, limit portion burr, flange, wound, the inspection of project such as staggered floor.

Surface quality: mainly comprise the inspection of projects such as striated surface, pit, oil mark, greasy dirt.During the inspection surface and oil contaminant, be used in aluminium foil surface and drip 3～5 65# pairing oil, use absorbent cotton once then, see whether absorbent cotton has black greasy dirt or aluminium powder etc. in the place's wiping of aluminium foil surface oil dripping.

Mechanical property: every volume must be taken a sample and done mechanical property and detect, and confirms can pack after qualified.

Require packing according to single zero Foilpac during packing.

Claims (2)

1. container foil material, it is characterized in that: its alloy composition composition and weight percent are Si 0.20～0.26%, Fe 0.42～0.50%, Cu 0.05%, Mn 0.15～0.20%, Mg 0.01%, Zn 0.1%, Ti 0.04%, Al surplus.

2. the method for manufacture of a container foil is characterized in that: pass through following steps successively,

A. melting, casting are raw material with the described container foil material of claim 1, use the low roll casting speed in electromagnetic agitating technology melting and little casting district to carry out casting, and the sotck thinkness after the casting is 7.0 ± 0.2mm;

B. cold rolling, during cold rolling first passage, working modulus is 30～40%, and follow-up pass reduction remains on about 45～50%, when being rolled down to 0.4～0.6mm thickness through 4～5 passages, after stopping in the middle of 20～30h, changeing the slitting operation and cuts edge;

C. the material that will cut edge is rolled to finished product thickness through 4～5 passage paper tinsels, and through cutting, annealing obtains the finished product then.