CN101705459A

CN101705459A - Processing method of 3005 aluminum alloy strip

Info

Publication number: CN101705459A
Application number: CN 200910231102
Authority: CN
Inventors: 马小波
Original assignee: SHANDONG FUHAI INDUSTRY Co Ltd
Current assignee: SHANDONG FUHAI INDUSTRY Co Ltd
Priority date: 2009-12-04
Filing date: 2009-12-04
Publication date: 2010-05-12
Anticipated expiration: 2029-12-04
Also published as: CN101705459B

Abstract

The invention discloses a processing method of a 3005 aluminum alloy strip, comprising the following process steps of casting and rolling blank, interannealing and final annealing. The processing method is characterized by interannealing: rolling cast-rolling stock with the thickness of larger than 7.5 mm and smaller than 9 mm by using cold-rolling equipment, when the cast-rolling stock is rolled to be 1.5-2 mm thich, putting in an annealing furnace with the temperature of 500-520 DEG C, and when the temperature of the stock is raised to 350-450 DEG C, keeping the temperature for 2-3h, and then directly taking out of the furnace for air cooling; and final annealing: rolling cold-rolling stock with the thickness of 0.2-0.5 mm by using the cold-rolling equipment, putting the stock into the annealing furnace and rapidly raising the temperature to 500 DEG C, and when the temperature of the stock reaches 200-300 DEG C, keeping the temperature for 2-3h, and then taking out of the furnace for air cooling to obtain a finished product. The 3005 aluminum alloy strip produced by the processing method has higher tensile strength of 220-240MPa and better elongation of 8-10 percent and completely meets the operating requirements of users on the internal organization and the mechanism property of alloy.

Description

The working method of 3005 alloy aluminum bands

Technical field:

The present invention relates to the alloy material processing technique field, is a kind of working method of 3005 alloy aluminum bands specifically, adopts the continuous casting roll process.

Background technology:

It is alloy that 3005 alloys belong to aluminium manganese magnesium, and this alloy has higher intensity, superior corrosion resistance, and weldability and good plasticity are widely used in curtain wall engineering and roll-type window or door processing etc.3005 alloy plate strips are usually by the processing of hot rolling method, hot rolling blank is that aluminium liquid is cast big slab ingot, washes one's face through large-scale milling machine, removes the oxide compound and the impurity of big flat bloom surface, the high temperature long-time heating is carried out in shove charge then, and the back of coming out of the stove is being rolled above under the condition of recrystallization temperature.Advantages such as the hot rolling method has that deflection is big, blank is organized fine and closely woven, satisfactory mechanical property, production efficiency height, but shortcomings such as the hot rolling line investment cost is big, the construction period is long, production cost is high, energy consumption height.

The continuous casting roll process is to allow aluminium liquid be directed to by a covering device in the roll gap that forms between two rolls, after the cooling and distortion by two rolls, obtains cast-rolling stock.It is the technology of the melting of aluminium being merged into twice to the diverse technology in several roads of hot rolling that continuous casting rolls.Connect casting and roll process production aluminum strip and have less investment, instant effect, advantage such as easy and simple to handle.But casting and roll process is produced the high alloy band technological difficulties of himself are arranged, inborn deficiency is arranged at aspect such as interior tissue, surface quality, mechanical property and hot rolling blank.

Chinese patent: CN200610048882.4, denomination of invention; With the heat treating method in the cast-rolling stock production 5XXX series of aluminium board complete processing, this method has been improved interior tissue and mechanical property that the continuous casting roll process is produced high alloy sheet material effectively.But this method can only be processed the cast-rolling stock of 5.5-7.5mm thickness, and is simultaneously oversize in process annealing stage soaking time, and finished products stages operating complexity need twice intensification, and soaking time is long; Thereby influence production efficiency, waste energy simultaneously.

Summary of the invention:

The objective of the invention is to overcome the deficiency of above-mentioned prior art, and provide a kind of working method of 3005 alloy aluminum bands, problem such as the hot rolling method investment that mainly solves existing production 3005 alloy plate strips is big, the construction period is long, production cost is high, energy consumption is high and connect casting and roll process band interior tissue, surface quality, mechanical properties deficiency and cast-rolling stock thickness is limited, production efficiency is low.

In order to achieve the above object, the present invention is achieved in that the working method of 3005 alloy aluminum bands, it comprises cast-rolling stock, process annealing, finished product annealing process step, it is rolling that the intermediate annealing process step that is its special character adopts cold-rolling equipment that thickness is carried out 5 passages greater than 7.5mm smaller or equal to the cast-rolling stock of 9mm, roll 1.5-2mm when thick, cold rolling blank is put in the annealing furnace, furnace gas temperature is the 500-520 degree, when blank temperature is raised to 350-450 and spends, be incubated 2-3 hour and directly come out of the stove air-cooled; The finished product annealing process step adopts cold-rolling equipment that the cold rolling blank after process annealing is handled is rolled processing, sotck thinkness after rolling is 0.2-0.5mm, then blank is put into annealing furnace, furnace gas temperature rises to 500 degree fast, when metal temperature reaches 200-300 and spends, be incubated 2-3 hour and come out of the stove air-cooled, finished product.

Compared with the prior art the working method of 3005 alloy aluminum bands of the present invention has outstanding substantive distinguishing features and marked improvement: the 3005 alloy aluminum bands that this working method is produced, have advantages of higher tensile strength 220-240MPa and unit elongation 8-10% preferably, satisfy the service requirements of user fully the interior tissue and the mechanical property of alloy.

Embodiment

In order to understand better and to implement, describe the working method of the present invention's 3005 alloy aluminum bands in detail below in conjunction with embodiment.

Embodiment 1, adopts conventional method processing cast-rolling stock, promptly allows aluminium liquid be directed to by a covering device in the roll gap that forms between two rolls, after the cooling and distortion by two rolls, obtains 3005 alloy cast-rolling stocks, and cast-rolling stock thickness is 7.6mm; Adopt cold-rolling equipment rolling to cast-rolling stock being carried out 5 passages then, the sotck thinkness after rolling is 1.5mm, then blank is put into annealing furnace, and furnace gas temperature is raised to 520 degree, treat that blank temperature is raised to 380 degree after, be incubated 2 hours and come out of the stove air-cooled; Carry out finished products then, the cold rolling blank that adopts cold-rolling equipment that process annealing is handled is rolled processing, puts into annealing furnace after rolling 0.3mm, furnace gas temperature is raised to 500 degree, blank temperature is raised to 280 degree, be incubated 2 hours and comes out of the stove air-cooled, must 3005 alloy aluminum bands.The tensile strength of the 0.3mm3005 alloy strip steel rolled stock after above-mentioned thermal treatment is 238Mpa, unit elongation 9%.

Utilize the prior art and the embodiment of the invention 1 respectively 3005 alloy strip steel rolled stocks of casting and roll process production to be heat-treated, its result is as follows:

Project	Rolling situation	Rolling minimal thickness mm	Tensile strength MPa	Unit elongation %	The result
Project	Rolling situation	Rolling minimal thickness mm	Tensile strength MPa	Unit elongation %	The result	There is not any thermal treatment	0.8 broken belt frequently can't be rolling during following thickness	??0.8	??360	Break	Template, performance inconsistency lattice
Process annealing	Rolling smooth	??0.3	??270	??2	The performance inconsistency lattice	There is not any thermal treatment		??0.8	??360	Break	Template, performance inconsistency lattice
Process annealing	Rolling smooth	??0.3	??270	??2	The performance inconsistency lattice	Process annealing and finished products (embodiment 1)	Rolling smooth	??0.3	??238	??9	Qualified

Embodiment 2, adopt conventional method to process 3005 alloy cast-rolling stocks, and cast-rolling stock thickness is 9.0mm; Adopt cold-rolling equipment rolling to cast-rolling stock being carried out 5 passages then, the sotck thinkness after rolling is 2.0mm, then blank is put into annealing furnace, and furnace gas temperature is raised to 500 degree, treat that blank temperature is raised to 450 degree after, be incubated 2 hours and come out of the stove air-cooled; Carry out finished products then, the cold rolling blank that adopts cold-rolling equipment that process annealing is handled is rolled processing, puts into annealing furnace after rolling 0.2mm, furnace gas temperature is raised to 500 degree, blank temperature is raised to 200 degree, be incubated 3 hours and comes out of the stove air-cooled, must 3005 alloy aluminum bands.The tensile strength of the 0.2mm3005 alloy strip steel rolled stock after above-mentioned thermal treatment is 235Mpa, unit elongation 8%.

Embodiment 3, adopt conventional method to process 3005 alloy cast-rolling stocks, and cast-rolling stock thickness is 8.0mm; Adopt cold-rolling equipment rolling to cast-rolling stock being carried out 5 passages then, the sotck thinkness after rolling is 1.8mm, then blank is put into annealing furnace, and furnace gas temperature is raised to 510 degree, treat that blank temperature is raised to 350 degree after, be incubated 3 hours and come out of the stove air-cooled; Carry out finished products then, the cold rolling blank that adopts cold-rolling equipment that process annealing is handled is rolled processing, puts into annealing furnace after rolling 0.5mm, furnace gas temperature is raised to 500 degree, blank temperature is raised to 300 degree, be incubated 2.5 hours and comes out of the stove air-cooled, must 3005 alloy aluminum bands.The tensile strength of the 0.5mm3005 alloy strip steel rolled stock after above-mentioned thermal treatment is 240Mpa, unit elongation 10%.

Claims

1.3005 the working method of alloy aluminum band, it comprises cast-rolling stock, process annealing, finished product annealing process step, it is rolling to it is characterized in that the intermediate annealing process step adopts cold-rolling equipment that thickness is carried out 5 passages greater than 7.5mm smaller or equal to the cast-rolling stock of 9mm, roll 1.5-2mm when thick, cold rolling blank is put in the annealing furnace, furnace gas temperature is the 500-520 degree, when blank temperature is raised to 350-450 and spends, is incubated 2-3 hour and directly comes out of the stove air-cooled; The finished product annealing process step adopts cold-rolling equipment that the cold rolling blank after process annealing is handled is rolled processing, sotck thinkness after rolling is 0.2-0.5mm, then blank is put into annealing furnace, furnace gas temperature rises to 500 degree fast, when blank temperature reaches 200-300 and spends, be incubated 2-3 hour and come out of the stove air-cooled, finished product.