CN106311744B - One kind reduces aluminium volume surface secret note production method - Google Patents

One kind reduces aluminium volume surface secret note production method Download PDF

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Publication number
CN106311744B
CN106311744B CN201610683924.5A CN201610683924A CN106311744B CN 106311744 B CN106311744 B CN 106311744B CN 201610683924 A CN201610683924 A CN 201610683924A CN 106311744 B CN106311744 B CN 106311744B
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rolling
aluminium
rolled
volume
secret note
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CN201610683924.5A
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Chinese (zh)
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CN106311744A (en
Inventor
曹盛强
王华春
彭自业
陈秋林
赵启淞
周志乐
郝成罡
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广西南南铝加工有限公司
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/74Temperature control, e.g. by cooling or heating the rolls or the product
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239Lubricating
    • B21B45/0245Lubricating devices
    • B21B45/0248Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0251Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B2267/00Roll parameters
    • B21B2267/10Roughness of roll surface

Abstract

The invention discloses one kind to reduce aluminium volume surface secret note production method, is related to technical field of aluminium alloy preparation, main technological steps include:Ingot casting heating, hot roughing, hot finishing, coiled material cooling, cold rolling, heat treatment, finishing and packaging.Carry out aluminium by adjusting hot finishing and cold rolling parameter and roll up the reduction of surface secret note, optimize improvement from the milling method on source, the generation of secret note is reduced at source, this will greatly reduce sequent surface intractability, and be worth of widely use.

Description

One kind reduces aluminium volume surface secret note production method

Technical field

The present invention relates to technical field of aluminium alloy preparation, more particularly to a kind of aluminium that reduces to roll up surface secret note production method.

Background technology

Existing aluminum alloy coiled materials rolling uses roughing+finish rolling rolling mode at present, and finish rolling has single chassis monovolume to take, is single Machine frame double-coiling and tandem rolling mode, easily because rolling emulsion, rolling coiling tension and mill speed etc. are joined in finishing stands Several influences causes dirty emulsion to enter in coiled material, and surface is also easy to produce viscous wound, the viscous wound of cold-rolled process in follow-up cooling procedure Be mixed together with ROLLING OIL and the dirty emulsion of finish rolling supplied materials, produce rolling to Black strip, had a strong impact on high surface requirements IT appearance member quality.Particularly in 1+1 two-folds take hot-rolling mill, the IT for producing no surface Black strip expects extremely difficult, multiple tracks Secondary double coiling process aluminium volume surfaces easily produce hot sticky wound.

The method of removal aluminium volume Black strip mainly has following several at present:One kind is by deoiling, changing in finished parts The processes such as optical polishing, anodic oxidation carry out reduction secret note;Another kind is by aluminum volume emulsion concentration, granularity and lubrication Fat etc. carries out improving operation of rolling emulsion lubrication, reduces working roll and glues aluminum layer thickness to solve the black silk in surface and black line;Also Exactly the viscous wound of coiled material surface is reduced to control Black strip by adjusting hot finishing and cold rolling tension force.These methods also have one A little deficiencies:(1)Subsequent treatment process is improved in finished parts to reduce surface of aluminum plate secret note, does not proceed by and subtracts from source It is few;(2)Aluminium is glued to reduce secret note to reduce working roll by adjusting emulsion parameter, is not optimized and is subtracted from milling method It is few.A kind of can be to turn into active demand with regard to that can reduce the aluminium volume production method of secret note from milling method from source.

The content of the invention

The deficiency for more than, it can be rolled up it is an object of the invention to provide a kind of on milling method with regard to the aluminium of secret note can be reduced Production method.

To reach above-mentioned purpose, the present invention adopts the following technical scheme that:

One kind reduces aluminium volume surface secret note production method, there is following steps:

(One)Ingot casting heats:Ingot casting to be processed is heated to more than the recrystallization temperature of the ingot casting to be processed;

(Two)Hot roughing:Multi- pass rolling, finish rolling bite the middle base in direction to the ingot casting to be processed repeatedly after heating It is 6-9mm that thickness is rolled in the 0-500mm length ranges of head, and the thickness in the middle part of middle base with afterbody is 15-20mm;

(Three)Hot finishing:Rolled using a time, be 9-10mm by thickness is rolled to afterbody in the middle part of the middle base, heat essence Emulsion spray, outlet side closure emulsion spray are opened in inlet of rolling mill side, and the hot finishing mill outlet side batches mandrel band steel bushing Carry out rolling to batch, mandrel contraction is batched after having rolled, finally obtain the finish rolling thin compared with outer ring coil thickness of inner ring coil thickness Inner wrap strip steel bushing is rolled up in volume, the finish rolling;

(Four)Coiled material cools down:After finish rolling volume with steel bushing is offline, it is placed in hanging steelframe and carries out natural cooling;

(Five)Cold rolling:Using multi- pass rolling, preceding 2 passes use heavy reduction rate and use roughness as 0.8-1.2 μ M working roll is rolled, and back pass rolling uses pair rolling, and finished product thickness is cold-rolled to through multi-pass, obtains aluminium volume;

(Six)Heat treatment:Promoting the circulation of qi pad furnace annealing is involved in the aluminium;

(Seven)Finishing:The aluminium is rolled up and carries out rewinding cutting, obtains finished product;

(Eight)Packaging:The finished product is packed, protected.

Preferably, the step(Three)In hot finishing, temperature of the middle base when carrying out the hot finishing and starting is 360-390 DEG C, temperature of the middle base at the end of the hot finishing is carried out is 300-330 DEG C.

Preferably, the step(Five)In cold rolling, the working modulus of preceding 2 passes in the multi- pass rolling is 40-60%, working roll roughness used in the back pass rolling is 0.3-0.5 μm.

Preferably, the step(Six)In heat treatment, air cushion furnace annealing temperature is 410-430 DEG C, and the aluminium volume is by adding The speed of hot-zone is 20-30m/min.

Compared with prior art, the beneficial effects of the invention are as follows:

By adjusting hot finishing rolling parameter, i.e., a time rolling, which is batched, reduces the distribution of coiled material surface secret note.Pass through cold rolling Preceding 2 passage carries out improving finish rolling blank surface quality using thicker roughness working roll and heavy reduction rate, i.e., former using grinding Reason carries out surface rubbing down, reduces the distribution of cold-rolled process secret note.Hot finishing mill outlet side emulsion spray is closed, and both outlet side did not used Emulsion is sprayed, and avoids multistage emulsion from entering plate surface so that producing excessive residual, causes the viscous wound of coiled material surface, and generation is rolled Make to Black strip.Carry out aluminium by adjusting hot finishing and cold rolling parameter and roll up the reduction of surface secret note, from rolling on source Method processed optimizes improvement, the generation of secret note is reduced at source, this will greatly reduce sequent surface intractability.

Brief description of the drawings

In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment Accompanying drawing be briefly described.

Fig. 1 is the surface image that the aluminium provided according to comparative example rolls up aluminium volume prepared by production method;

A kind of process chart for reducing aluminium volume surface secret note production method in Fig. 2 present invention;

Fig. 3 is the surface reduced aluminium and roll up aluminium volume prepared by surface secret note production method provided according to the embodiment of the present invention 1 Image;

Fig. 4 is the surface reduced aluminium and roll up aluminium volume prepared by surface secret note production method provided according to the embodiment of the present invention 2 Image;

Fig. 5 is the surface reduced aluminium and roll up aluminium volume prepared by surface secret note production method provided according to the embodiment of the present invention 3 Image.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes.Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made Embodiment, belong to the scope of protection of the invention.

Comparative example

The aluminium volume production method that a kind of prior art uses, there is following steps:

(One)Ingot casting heats:Ingot casting to be processed is heated to more than the recrystallization temperature of the ingot casting to be processed.

The ingot casting to be processed is 5252 alloy cast ingots, the aluminium flake that 5252/O thickness is 1.2mm is prepared into, for mobile phone system Standby, ingot casting heating-up temperature to be processed is 510 DEG C.

(Two)Hot roughing:It is 25mm that the ingot casting to be processed after heating is rolled into thickness, obtains middle base.

(Three)Hot finishing:Using three passes, each passage thickness of finish rolling is 16mm, 9.5mm, 6.0mm.Hot finishing mill enters Mouthful side and outlet side open emulsion spray, and the hot finishing mill outlet side, which batches mandrel, to carry out rolling without steel bushing and batch, and obtains The overall consistent finish rolling volume of thickness.

In this comparative example, temperature of the middle base when carrying out the hot finishing and starting is 440 DEG C, the centre Temperature of the base at the end of the hot finishing is carried out is 320 DEG C.

(Four)Coiled material cools down:After the finish rolling volume is offline, it is placed on Pillar for saddle and carries out natural cooling.

The finish rolling volume naturally cools to room temperature.

(Five)Cold rolling:Cold rolling described in this comparative example is rolled using four-pass, and working roll roughness used is 0.45 μ m.In four cold rollings, after corresponding cold rolling each time aluminium roll up thickness be followed successively by 4.2mm, 2.8mm, 1.8mm with 1.2mm.The finished product thickness is 1.2mm, obtains aluminium volume.

(Six)Heat treatment:Promoting the circulation of qi pad furnace annealing is involved in the aluminium.

Air cushion furnace annealing temperature is 420 DEG C, and the speed that the aluminium volume passes through heating zone is 25m/min.

(Seven)Finishing:The aluminium is rolled up and carries out rewinding cutting, obtains finished product.

(Eight)Packaging:The finished product is packed, protected.

Aluminium volume is prepared according to the aluminium volume production method that comparative example provides, the aluminium is rolled up and carries out alkali cleaning in 30 seconds and 20 points The processing of clock anodic oxidation, the surface of the aluminium volume obtained are as shown in Figure 1.

Embodiment 1

Fig. 2 is refer to, one kind reduces aluminium volume surface secret note production method, there are following steps:

(One)Ingot casting heats:Ingot casting to be processed is heated to more than the recrystallization temperature of the ingot casting to be processed.

The ingot casting to be processed is 5252 alloy cast ingots, the aluminium flake that 5252/O thickness is 1.2mm is prepared into, for mobile phone system Standby, ingot casting heating-up temperature to be processed is 510 DEG C.

(Two)Hot roughing:Multi- pass rolling, finish rolling bite the middle base in direction to the ingot casting to be processed repeatedly after heating It is 7mm that thickness is rolled in the 500mm length of head, and the thickness in the middle part of middle base with afterbody is 18mm.

(Three)Hot finishing:Rolled using a time, it is 9.5mm that the middle base is rolled into thickness, hot finishing mill entrance side Emulsion spray is opened, outlet side emulsion is closed, and the hot finishing mill outlet side batches mandrel band steel bushing and carries out rolling and batch, and obtains Obtain finish rolling of the inner ring thickness for 7mm and with steel bushing volume.

Preferably, in the present embodiment, temperature of the middle base when carrying out the hot finishing and starting is 380 DEG C, described Temperature of the middle base at the end of the hot finishing is carried out is 320 DEG C.

(Four)Coiled material cools down:After finish rolling volume with steel bushing is offline, it is placed in hanging steelframe and carries out natural cooling.

The finish rolling volume naturally cools to room temperature.

(Five)Cold rolling:Cold rolling described in the present embodiment is rolled using four-pass.Working roll roughness used in preceding 2 passes For 0.9 μm, working modulus is respectively 47% and 44%;Working roll roughness used in 2 passes is 0.4 μm afterwards.Four cold rollings In, the thickness that aluminium is rolled up after corresponding cold rolling each time is followed successively by 5.0mm, 2.8mm, 1.8mm and 1.2mm.Obtained after cold rolling Aluminium is rolled up.

(Six)Heat treatment:Promoting the circulation of qi pad furnace annealing is involved in the aluminium.

Air cushion furnace annealing temperature is 420 DEG C, and the speed that the aluminium volume passes through heating zone is 25m/min.

(Seven)Finishing:The aluminium is rolled up and carries out rewinding cutting, obtains finished product.

(Eight)Packaging:The finished product is packed, protected.

Present embodiments provide a kind of aluminium that reduces and roll up surface secret note production method, by adjusting hot finishing rolling parameter, i.e., A time rolling, which is batched, reduces the distribution of coiled material surface secret note.By 2 passages before cold rolling using thicker roughness working roll and greatly Reduction ratio carries out improving finish rolling blank surface quality, i.e., carries out surface rubbing down using lapping principle, reduces cold-rolled process secret note point Cloth.Hot finishing mill outlet side emulsion spray is closed, and was avoided multistage emulsion from entering plate surface so that producing excessive residual, and was caused to roll up The viscous wound in material surface, produce rolling to Black strip.Carry out aluminium by adjusting hot finishing and cold rolling parameter and roll up surface secret note Reduce, improvement is optimized from the milling method on source, the generation of secret note is reduced at source, this will greatly reduce rear continued Face intractability.

Embodiment 2

One kind reduces aluminium volume surface secret note production method, there is following steps:

(One)Ingot casting heats:Ingot casting to be processed is heated to more than the recrystallization temperature of the ingot casting to be processed.

The ingot casting to be processed is 5252 alloy cast ingots, the aluminium flake that 5252/O thickness is 1.2mm is prepared into, for mobile phone system Standby, ingot casting heating-up temperature to be processed is 510 DEG C.

(Two)Hot roughing:Multi- pass rolling, finish rolling bite the middle base in direction to the ingot casting to be processed repeatedly after heating It is 6mm that thickness is rolled in the 500mm length of head, and the thickness in the middle part of middle base with afterbody is 15mm.

(Three)Hot finishing:Rolled using a time, it is 9mm that the middle base is rolled into thickness, and hot finishing mill entrance side is opened Emulsion spray is opened, outlet side emulsion is closed, and the hot finishing mill outlet side batches mandrel band steel bushing and carries out rolling and batch, and obtains Inner ring thickness is 6mm and the finish rolling volume with steel bushing.

Preferably, in the present embodiment, temperature of the middle base when carrying out the hot finishing and starting is 360 DEG C, described Temperature of the middle base at the end of the hot finishing is carried out is 300 DEG C.

(Four)Coiled material cools down:After finish rolling volume with steel bushing is offline, it is placed in hanging steelframe and carries out natural cooling.

The finish rolling volume naturally cools to room temperature.

(Five)Cold rolling:Cold rolling described in the present embodiment is rolled using four-pass.Working roll roughness used in preceding 2 passes For 1.0 μm, working modulus is respectively 40% and 55%;Working roll roughness used in 2 passes is 0.3 μm afterwards.Four cold rollings In, the thickness that aluminium is rolled up after corresponding cold rolling each time is followed successively by 5.4mm, 2.43mm, 1.8mm and 1.2mm.Obtained after cold rolling Aluminium is rolled up.

(Six)Heat treatment:Promoting the circulation of qi pad furnace annealing is involved in the aluminium.

Air cushion furnace annealing temperature is 410 DEG C, and the speed that the aluminium volume passes through heating zone is 20m/min.

(Seven)Finishing:The aluminium is rolled up and carries out rewinding cutting, obtains finished product.

(Eight)Packaging:The finished product is packed, protected.

Present embodiments provide a kind of aluminium that reduces and roll up surface secret note production method, by adjusting hot finishing rolling parameter, i.e., A time rolling, which is batched, reduces the distribution of coiled material surface secret note.By 2 passages before cold rolling using thicker roughness working roll and greatly Reduction ratio carries out improving finish rolling blank surface quality, i.e., carries out surface rubbing down using lapping principle, reduces cold-rolled process secret note point Cloth.Hot finishing mill outlet side emulsion spray is closed, and was avoided multistage emulsion from entering plate surface so that producing excessive residual, and was caused to roll up The viscous wound in material surface, produce rolling to Black strip.Carry out aluminium by adjusting hot finishing and cold rolling parameter and roll up surface secret note Reduce, improvement is optimized from the milling method on source, the generation of secret note is reduced at source, this will greatly reduce rear continued Face intractability.

Embodiment 3

One kind reduces aluminium volume surface secret note production method, there is following steps:

(One)Ingot casting heats:Ingot casting to be processed is heated to more than the recrystallization temperature of the ingot casting to be processed.

The ingot casting to be processed is 5252 alloy cast ingots, the aluminium flake that 5252/O thickness is 1.2mm is prepared into, for mobile phone system Standby, ingot casting heating-up temperature to be processed is 510 DEG C.

(Two)Hot roughing:Multi- pass rolling, finish rolling bite the middle base in direction to the ingot casting to be processed repeatedly after heating It is 8.5mm that thickness is rolled in the 500mm length of head, and the thickness in the middle part of middle base with afterbody is 20mm.

(Three)Hot finishing:Rolled using a time, it is 10mm that the middle base is rolled into thickness, and hot finishing mill entrance side is opened Emulsion spray is opened, outlet side emulsion is closed, and the hot finishing mill outlet side batches mandrel band steel bushing and carries out rolling and batch, and obtains Inner ring thickness is 8.5mm and the finish rolling volume with steel bushing.

Preferably, in the present embodiment, temperature of the middle base when carrying out the hot finishing and starting is 390 DEG C, described Temperature of the middle base at the end of the hot finishing is carried out is 330 DEG C.

(Four)Coiled material cools down:After finish rolling volume with steel bushing is offline, it is placed in hanging steelframe and carries out natural cooling.

The finish rolling volume naturally cools to room temperature.

(Five)Cold rolling:Cold rolling described in the present embodiment is rolled using four-pass.Working roll roughness used in preceding 2 passes For 1.2 μm, working modulus is respectively 57% and 50%;Working roll roughness used in 2 passes is 0.5 μm afterwards.Four cold rollings In, the thickness that aluminium is rolled up after corresponding cold rolling each time is followed successively by 5.3mm, 2.65mm, 1.8mm and 1.2mm.Obtained after cold rolling Aluminium is rolled up.

(Six)Heat treatment:Promoting the circulation of qi pad furnace annealing is involved in the aluminium.

Air cushion furnace annealing temperature is 430 DEG C, and the speed that the aluminium volume passes through heating zone is 30m/min.

(Seven)Finishing:The aluminium is rolled up and carries out rewinding cutting, obtains finished product.

(Eight)Packaging:The finished product is packed, protected.

Present embodiments provide a kind of aluminium that reduces and roll up surface secret note production method, by adjusting hot finishing rolling parameter, i.e., A time rolling, which is batched, reduces the distribution of coiled material surface secret note.By 2 passages before cold rolling using thicker roughness working roll and greatly Reduction ratio carries out improving finish rolling blank surface quality, i.e., carries out surface rubbing down using lapping principle, reduces cold-rolled process secret note point Cloth.Hot finishing mill outlet side emulsion spray is closed, and was avoided multistage emulsion from entering plate surface so that producing excessive residual, and was caused to roll up The viscous wound in material surface, produce rolling to Black strip.Carry out aluminium by adjusting hot finishing and cold rolling parameter and roll up surface secret note Reduce, improvement is optimized from the milling method on source, the generation of secret note is reduced at source, this will greatly reduce rear continued Face intractability.

Surface secret note producer legal system is rolled up according to the reduction aluminium that the embodiment of the present invention 1, embodiment 2 and embodiment 3 are provided Standby aluminium is rolled up, and carries out the processing of alkali cleaning in 30 seconds and anodic oxidation in 20 minutes respectively to aluminium volume, the surface point of the aluminium volume obtained Not as shown in Fig. 3, Fig. 4 and Fig. 5.Fig. 1 is that the aluminium provided according to comparative example rolls up aluminium volume surface image prepared by production method, It will be seen from figure 1 that obtaining the aluminium volume surface that aluminium volume production method is produced in the prior art glues wound seriously, Black strip is obvious, The outward appearance and quality of aluminium volume are had a strong impact on, the use to aluminium volume causes significant impact.Reduction aluminium provided in an embodiment of the present invention Volume surface secret note production method prepares aluminium volume, as can be seen that shown aluminium volume surface is without obvious viscous wound from Fig. 3, Fig. 4 and Fig. 5 And secret note, both reduction aluminium provided by the invention, which had rolled up surface secret note production method, improves the outward appearance and quality of aluminium volume, is worthy to be popularized Use.

The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any Those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should It is included within the scope of the present invention.Therefore, protection scope of the present invention should using the scope of the claims as It is accurate.

Claims (4)

1. one kind reduces aluminium volume surface secret note production method, it is characterised in that has following steps:
(One)Ingot casting heats:Ingot casting to be processed is heated to more than the recrystallization temperature of the ingot casting to be processed;
(Two)Hot roughing:Multi- pass rolling, finish rolling bite the middle base head in direction to the ingot casting to be processed repeatedly after heating It is 6-9mm that thickness is rolled in 0-500mm length ranges, and the thickness in the middle part of middle base with afterbody is 15-20mm;
(Three)Hot finishing:Rolled using a time, will in the middle part of the middle base and afterbody to be rolled to thickness be 9-10mm, hot finishing mill Entrance side opens emulsion spray, outlet side closure emulsion spray, and the hot finishing mill outlet side batches mandrel band steel bushing and carried out Rolling is batched, and mandrel contraction is batched after having rolled, and finally obtains the inner ring coil thickness finish rolling volume thin compared with outer ring coil thickness, institute State finish rolling volume inner wrap strip steel bushing;
(Four)Coiled material cools down:After finish rolling volume with steel bushing is offline, it is placed in hanging steelframe and carries out natural cooling;
(Five)Cold rolling:Using multi- pass rolling, preceding 2 passes use heavy reduction rate and use roughness as 0.8-1.2 μm Working roll is rolled, and back pass rolling uses pair rolling, and finished product thickness is cold-rolled to through multi-pass, obtains aluminium volume;
(Six)Heat treatment:Promoting the circulation of qi pad furnace annealing is involved in the aluminium;
(Seven)Finishing:The aluminium is rolled up and carries out rewinding cutting, obtains finished product;
(Eight)Packaging:The finished product is packed, protected.
2. reduction aluminium volume surface secret note production method according to claim 1, it is characterised in that:The step(Three)Hot essence In rolling, temperature of the middle base when carrying out the hot finishing and starting is 360-390 DEG C, and the middle base is carrying out the heat Temperature at the end of finish rolling is 300-330 DEG C.
3. reduction aluminium volume surface secret note production method according to claim 1, it is characterised in that:The step(Five)Cold rolling In, the working modulus of preceding 2 passes in the multi- pass rolling is 40-60%, and the back pass rolling is used to work Roller roughness is 0.3-0.5 μm.
4. reduction aluminium volume surface secret note production method according to claim 1, it is characterised in that:The step(Six)At heat In reason, air cushion furnace annealing temperature is 410-430 DEG C, and the speed that the aluminium volume passes through heating zone is 20-30m/min.
CN201610683924.5A 2016-08-18 2016-08-18 One kind reduces aluminium volume surface secret note production method CN106311744B (en)

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