CN109317679A - A kind of aluminum alloy thin plate production method - Google Patents
A kind of aluminum alloy thin plate production method Download PDFInfo
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- CN109317679A CN109317679A CN201811062268.2A CN201811062268A CN109317679A CN 109317679 A CN109317679 A CN 109317679A CN 201811062268 A CN201811062268 A CN 201811062268A CN 109317679 A CN109317679 A CN 109317679A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/057—Changing 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 copper as the next major constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The present invention provides a kind of production methods of aluminum alloy plate materials, including by Al alloy powder compression moulding, sintering, machining, multi-pass cold rolling, finishing shearing and final annealing；Blank anneal first is carried out to sintered blank before the cold rolling；In the multi-pass cold rolling, for the reduction ratio before total deformation reaches 50% per pass less than 8%, total deformation is greater than the reduction ratio after 50% per pass in 10-30%；The total deformation of aluminum alloy plate materials is 50-92% after the multi-pass cold rolling；It is aided with intermediate annealing after any a time cold rolling.The production method of aluminum alloy plate materials of the invention, can be mass aluminum alloy plate materials, and compared with the aluminum alloy plate materials of casting and roll process production, at low cost, band microscopic structure is uniform in size, segregation-free, and intensity is high；The defects of compared with the method for powder Direct Rolling production aluminum alloy plate materials, simple process, application is more flexible, economic, and plate compactness height, no hole.
Description
Technical field
The present invention relates to a kind of production methods of aluminum alloy thin plate, belong to technical field of aluminum alloy technology.
Background technique
Aluminium alloy plate is a kind of industrial building materials, various industries is used for according to the difference of material, such as Aeronautics and Astronautics, automobile, machine
The industries such as tool manufacture, ship and chemical industry.
Currently, aluminum alloy plate materials are more main one kind in aluminium alloy extrusions, and the maximum one kind of industrial dosage,
Production method be by aluminium alloy perhaps direct chill casting at ingot or continuous casting at thick strip, be then rolled into predetermined thickness
The plate of degree, then with after individually plate is cold-rolled to final thickness by process together, carry out heat treatment process.
However, the aluminum alloy plate materials of above-mentioned this method production have the defect of itself, such as plate interior tissue uniformity
Difference, in casting process there are component segregation, be mingled with the defects of, residual stress is uneven, and formability is poor, this to apply
It is easily deformed when aluminum alloy plate materials processing part in the process, to influence the quality and precision of the part of processing.In addition, casting method
The utilization rate of material is lower in production process, and production process is longer, thus aluminum alloy plate materials production cost is higher.
And method for producing aluminum alloy plate provided in the present invention can eliminate defect present in the above method.
That is Powder Sintered Blanks cold-rolling practice, this method are to produce a kind of method of metal plate including bimetallic, band,
Compared with powder Direct Rolling method, simple process, application is more flexible, economical, is not in that the influences such as disconnected band or hole are raw
The defect of efficiency and product quality is produced, and strip quality is high, intensity, consistency are high.And compared with casting and roll process, Powder Sintered Blanks roll
System production aluminum alloy plate materials there is no such as component segregation, be mingled with influence product quality defect, and rolling after plate it is close
The density substantially close to or equal to as cast condition material is spent, intensity is higher.
Summary of the invention
In view of this, material can be effectively improved it is an object of the invention to provide a kind of aluminum alloy thin plate production method
Structural homogenity, the defects of avoiding component segregation, be mingled with, to achieve the purpose that improve product processing performance.Its simple process,
Using more flexible, economic, energy rapid batch production high-quality Al latten material.
In R&D process of the invention, encounters and be most difficult to solve the problems, such as how to obtain high finished product rate, high quality
Product.
In order to achieve the above objectives, the present invention provides the following technical solutions (as shown in Figure 1), including Al alloy powder is pressed into
Shape, sintering, machining, multi-pass cold rolling, finishing shearing and final annealing；In the multi-pass cold rolling, reach in total deformation
For reduction ratio before 50% per pass less than 8%, total deformation is greater than the reduction ratio after 50% per pass in 10-30%；It is more
The total deformation of passage cold rolling is 50-92%；It is aided with intermediate annealing after any a time cold rolling.
A kind of production method of aluminum alloy thin plate of the present invention,
The powder pressing is formed using hydraulic single column press or four-column hydraulic press；
The sintering is carried out using vacuum hotpressing stove；
The cold rolling is completed using two rollers or four-high mill.
A kind of production method of aluminum alloy thin plate of the present invention,
The aluminum alloy thin plate raw material of the cold rolling is prepared into green compact using Al alloy powder compression moulding, then true
Sintered blank is made in sintering in empty hot pressing furnace, finally the slab of square or rectangular is cut into using wire cutting, to obtain cold
It rolls and uses raw material.
A kind of production method of aluminum alloy thin plate of the present invention, the granularity of Al alloy powder are 10-100 microns, are preferably
47-61 microns.In order to improve the sintering characteristic of Al alloy powder, 2% magnesium elements are added into raw material powder.
In the lab, the intermediate annealing, final annealing carry out in tube furnace.Lead to high-purity argon gas in tube furnace
(99.999%) it protects.Industrially in application, all atmosphere furnaces may be incorporated for the present invention.
A kind of production method of aluminum alloy thin plate of the present invention, the pressure of Al alloy powder compression moulding are 200-
400MPa；Dwell time is 8-15s.
A kind of production method of aluminum alloy thin plate of the present invention, green compact obtained by Al alloy powder compression moulding with a thickness of 2-
10mm。
A kind of production method of aluminum alloy thin plate of the present invention, green compact sintering temperature are 535-625 DEG C, preferably 575-
625℃；Green compact sintering pressure is 2-10MPa.
A kind of production method of aluminum alloy thin plate of the present invention, it is described to be machined as: for the base of cylindrical steel mold pressing
Its four round edges are cut away using electric arc scribing line cutting machine after material sintering, leave original of the intermediate square sintered blank as rolling
Material.After machining, square slab (because round billet is in cold-rolled process because local shear forces are easy cracking), thickness are obtained
For 2-9mm.
A kind of production method of aluminum alloy thin plate of the present invention, carries out an intermediate annealing per pass after cold rolling；Become when total
When shape amount is less than 50%, per pass after intermediate anneal temperature be 320-350 DEG C；Soaking time is 90-120min, is then come out of the stove
It is air-cooled；When total deformation be greater than 50% when, per pass after intermediate annealing system be 390~450 DEG C, keep the temperature 1~3h；After heat preservation
It is cooled to 260 DEG C hereinafter, coming out of the stove again air-cooled with the cooling velocity no more than 30 DEG C/h.
A kind of production method of aluminum alloy thin plate of the present invention, the finishing shearing is: for cylindrical steel mold pressing
Its four round edges are cut away using electric spark wire cutting machine after blank sintering, intermediate square sintered blank is left and is used as to strip plate.
After machining, obtain with a thickness of 2-9mm square slab (because round billet is in cold-rolled process because local shear forces are easy out
It splits).
The temperature of a kind of production method of aluminum alloy thin plate of the present invention, the final annealing is 390~450 DEG C, preferably
It is 410-420 DEG C；Keep the temperature 60~180min, preferably 90-150min；It is cooled to after heat preservation with the cooling velocity no more than 30 DEG C/h
260 DEG C hereinafter, come out of the stove air-cooled again
A kind of production method of aluminum alloy thin plate of the present invention, plate finished product final after rolling-annealing are thick
Degree is 0.5~4.0mm.
A kind of production method of aluminum alloy thin plate of the present invention, when Al alloy powder is 2A12 Al alloy powder,
The green compact with a thickness of 2-10mm is obtained with the pressing pressure compression moulding of 200-400MPa；Then in vacuum condition
Under, in 535-625 DEG C of progress pressure sintering 90-150min；After pressure sintering, cogging is processed into a thickness of 2-9mm to strip plate；
The cold rolling that strip plate carries out at least 6 passages is treated, is aided with an intermediate annealing between rolling per pass；Last a time cold rolling is completed
Afterwards, finishing shearing and final annealing are carried out；Obtain product；In the multi-pass cold-rolled process, total deformation reach 50% with
For preceding reduction ratio per pass less than 8%, total deformation is greater than the reduction ratio after 50% per pass in 10-30% and adjacent two
The direction of passes is into θ angle, and the value at the angle θ is 60-120 °；The temperature of the intermediate annealing are as follows: when single pass deforms
Amount less than 8% when, per pass after intermediate anneal temperature be 320-350 DEG C；Soaking time is 90-120min, sky of then coming out of the stove
It is cold；When single pass heavy deformation is in 10-30%, per pass after intermediate annealing system be 390~450 DEG C, keep the temperature 1~3h；It protects
It is cooled to 260 DEG C hereinafter, coming out of the stove again air-cooled with the cooling velocity no more than 30 DEG C/h after temperature；The temperature of the final annealing is 390
~450 DEG C, keep the temperature 1~3h；It is cooled to 260 DEG C hereinafter, coming out of the stove again air-cooled with the cooling velocity no more than 30 DEG C/h after heat preservation；It obtains
With a thickness of the product of 0.5~4.0mm；The tensile strength of the product is 300~410MPa, is preferably 350~410MPa, further
Preferably 380~410MPa.
A kind of production method of aluminum alloy thin plate of the present invention, the granularity of the 2A12 Al alloy powder are 250~300
Mesh；Al alloy powder is the subsphaeroidal powder of water atomization preparation.
The yield rate of a kind of production method of aluminum alloy thin plate of the present invention, product is more than or equal to 95%.
The present invention is by avoiding cold rolling in the case where controlling the synergistic effect of every a time cold rolling reduction and other conditions
Plate generates side and splits in the process, greatly improves the yield rate of product and the quality of gained finished product.Beneficial effect of the invention
Fruit is: a kind of production method of aluminum alloy thin plate provided by the invention being capable of production high quality aluminum alloy thin rapidly and efficiently
Plate, simple process is flexible in application, economical, and utilization rate of raw materials is high, and equipment requirement is low, and process is few.The method can be effective
The structural homogenity for improving plate, the defects of avoiding component segregation, be mingled with, so that reaching improves finished product plate processing performance and power
Learn the purpose of performance.By this method produce 0.5~4.0mm specification 2A12 aluminum alloy thin plate tensile strength be 300~
410MPa。
Detailed description of the invention
The present invention is explained in detail below by way of the embodiment being shown in the accompanying drawings:
Fig. 1 is aluminum alloy thin plate production procedure designed by the present invention；
Fig. 2 is aluminium alloy sinters base cold rolling direction schematic diagram designed by the present invention；
Sintered blank rolling front and back macrograph in Fig. 3 embodiment 1；
In Fig. 4 embodiment 1 under different processes plate load-deformation curve；
Plate macrograph under different rolling pass deflections in Fig. 5 comparative example 1；
Plate macrograph under single rolling direction in Fig. 6 comparative example 2；
Macrograph in Fig. 7 comparative example 3 after round sintered blank cold rolling；
Plate macrograph is rolled after different sintering temperatures in Fig. 8 comparative example 4.
Specific embodiment
The present invention is further explained in the light of specific embodiments, so that those skilled in the art can be better
Understand the present invention and be practiced, but illustrated embodiment is not as a limitation of the invention.
In the present invention, the calculation of yield rate is；Sample/total number of samples * 100% of crackle is not present in surface.
Embodiment 1:
Prepare the 2A12 aluminum alloy plate materials with a thickness of 0.5mm；
Production method according to the invention, 250~300 mesh using the production of Changsha Tian Jiu metal material Co., Ltd are spherical
2A12 Al alloy powder (the subsphaeroidal powder of water atomization preparation) is that (its chemical component meets the rule of GB/T3190 to raw material powder
It is fixed), plate production procedure is as shown in Figure 1, powder prepares green compact (green compact with a thickness of 3mm), general by steel mold pressing forming
Green compact sintering in high vacuum precise vacuum hot pressing furnace prepare cold rolled sheet raw material (575 DEG C of sintering temperature, time 120min,
Pressure is 10MPa), sintered blank is cut into square platelet (with a thickness of 2.5mm) using wire cutting, and its surface is carried out clear
It washes, square platelet is rolled on reversible two-roll cold rolling mill, single pass reduction ratio is controlled 5%；Between passage into
Row intermediate annealing, annealing temperature are 330 DEG C, keep the temperature 2h；As shown in Fig. 2, along R1、R2Direction intersects cold rolling (R1、R2The folder in direction
Angle is 90 °)；After 2A12 aluminum alloy plate materials are rolling to 0.5mm thickness (total deformation 80%), alignment and finishing are carried out to plate
Shearing；Final annealing is finally carried out to it, annealing temperature is 420 DEG C, 2h is kept the temperature, then with the cooling velocity no more than 30 DEG C/h
It is cooled to 260 DEG C hereinafter, coming out of the stove again air-cooled.Gained light sheet tensile strength is 349.61MPa.
Above-mentioned experiment 100 times are repeated, yield rate 99%.
Embodiment 2:
Prepare the 2A12 aluminum alloy plate materials with a thickness of 1.0mm；
Its preparation process is consistent with the process of embodiment 1, light sheet production process (the plate total deformation of detailed in Example 1
Amount is 60%).Gained light sheet tensile strength is 311.59MPa.
Above-mentioned experiment 100 times are repeated, yield rate 99%.By embodiment 1 and embodiment 2 as can be seen that rolled plate
Total deflection size influences its tensile strength.
Embodiment 3；
Prepare the 2A12 aluminum alloy plate materials with a thickness of 0.5mm；
Production method according to the invention, 250~300 mesh using the production of Changsha Tian Jiu metal material Co., Ltd are spherical
2A12 Al alloy powder (the subsphaeroidal powder of water atomization preparation) is that (its chemical component meets the rule of GB/T3190 to raw material powder
It is fixed), plate production procedure is as shown in Figure 1, powder prepares green compact (green compact with a thickness of 3mm), general by steel mold pressing forming
Green compact sintering in high vacuum precise vacuum hot pressing furnace prepare cold-strip raw material (535 DEG C of sintering temperature, time 120min,
Pressure is 10MPa), sintered blank is cut into square platelet (with a thickness of 2.5mm) using wire cutting, and its surface is carried out clear
It washes, square platelet is rolled on reversible two-roll cold rolling mill, single pass reduction ratio is controlled 8%；Between passage into
Row intermediate annealing, annealing temperature are 330 DEG C, keep the temperature 2h；As shown in Fig. 2, along R1、R2Direction intersects cold rolling (R1、R2The folder in direction
Angle is 60 °)；After 2A12 aluminum alloy plate materials are rolling to 0.5mm thickness, alignment is carried out to plate and finishing is sheared；Finally to it
Final annealing is carried out, annealing temperature is 420 DEG C, keeps the temperature 2h, is cooled to 260 DEG C hereinafter, again with the cooling velocity no more than 30 DEG C/h
It comes out of the stove air-cooled.Gained light sheet tensile strength is 313.11MPa.
Above-mentioned experiment 100 times are repeated, yield rate 95%.By embodiment 1 and embodiment 3 as can be seen that compacting green compact
During sintering densification, the yield rate of sintering temperature influence of rolled plate.
Embodiment 4
Prepare the 2A12 aluminum alloy plate materials with a thickness of 0.5mm；
Production method according to the invention, 250~300 mesh using the production of Changsha Tian Jiu metal material Co., Ltd are spherical
2A12 Al alloy powder (the subsphaeroidal powder of water atomization preparation) is that (its chemical component meets the rule of GB/T3190 to raw material powder
It is fixed), plate production procedure is as shown in Figure 1, powder prepares green compact (green compact with a thickness of 3mm), general by steel mold pressing forming
Green compact sintering in high vacuum precise vacuum hot pressing furnace prepare cold-strip raw material (575 DEG C of sintering temperature, time 120min,
Pressure is 5MPa), sintered blank is cut by square platelet (with a thickness of 2.5mm) using wire cutting, and clean to its surface,
Square platelet is rolled on reversible two-roll cold rolling mill, single pass reduction ratio is controlled 8%；In being carried out between passage
Between anneal, annealing temperature be 330 DEG C, keep the temperature 2h；As shown in Fig. 2, along R1、R2Direction intersects cold rolling (R1、R2The angle in direction is
60°)；After 2A12 aluminum alloy plate materials are rolling to 0.5mm thickness, alignment is carried out to plate and finishing is sheared；Finally it is carried out
Final annealing, annealing temperature are 420 DEG C, keep the temperature 2h, are cooled to 260 DEG C hereinafter, coming out of the stove again with the cooling velocity no more than 30 DEG C/h
It is air-cooled.Gained light sheet tensile strength is 347.45MPa.
Above-mentioned experiment 100 times are repeated, yield rate 95%.By embodiment 1 and embodiment 4 as can be seen that passage pushes
The angular compliance of amount and tandem rolling, can be improved the yield rate of product.
Embodiment 5
Other conditions are consistent with embodiment 4, the difference is that:
The temperature of intermediate annealing is 350 DEG C, time 2h；The system of final annealing is 450 DEG C, time 60min；Gained
Light sheet tensile strength is 394.5MPa.
Above-mentioned experiment 100 times are repeated, yield rate 96%.By embodiment 4 and embodiment 5 as can be seen that annealing schedule
It will affect the intensity of product.
Embodiment 6:
Such as: prepare 1050 aluminum alloy plate materials with a thickness of 1.5mm；
Its preparation process is consistent with the process of embodiment 1, and difference is that intermediate annealing is different from final annealing system.It is intermediate
The temperature of annealing is 370 DEG C, time 2h；The system of final annealing is 430 DEG C, time 90min；Gained light sheet tension is strong
Degree is 121.4MPa.
Above-mentioned experiment 100 times are repeated, yield rate 96%.
Comparative example 1
Other conditions parameter is consistent with embodiment 1, the difference is that rolling pass deflection is 15%；As shown in figure 5,
Since single pass heavy deformation leads to greatly product edge crack, the yield rate of products obtained therefrom is only 40%.And the tensile strength of product
Only 212.54MPa.
Comparative example 2
Other conditions parameter is consistent with embodiment 1, the difference is that passes deflection is 8%, but not using friendship
For rolling (i.e. R1、R2The angle in direction is 0 °)；As shown in fig. 6, plate is rolled into long ribbon shape, and due to single direction
Extension causes plate to occur being bent and distort, while side occurs and splitting phenomenon.The yield rate of products obtained therefrom is only 75%.And product
Tensile strength is only 298.7MPa.
Comparative example 3
Other conditions parameter is consistent with embodiment 1, the difference is that being circle to strip plate, as shown in fig. 7, rolling pass
In the identical situation of deflection, when being rolled using round sintered blank, sample is easy cracking；The yield rate of products obtained therefrom is only
It is 45%.And the tensile strength of product is only 195.54MPa.
Comparative example 4
Other conditions parameter is consistent with embodiment 1, the difference is that green compact are burnt in high vacuum precise vacuum hot pressing furnace
Junction temperature is 525 DEG C, time 120min, pressure 10MPa)；As shown in figure 8, side, which occurs, in plate splits phenomenon, products obtained therefrom
Yield rate is only 65%.And the tensile strength of product is only 278.8MPa.
Claims (10)
1. a kind of production method of aluminum alloy thin plate, it is characterised in that include the following steps；By Al alloy powder compression moulding,
Sintering, machining, multi-pass cold rolling, finishing shearing and final annealing；Blank anneal first is carried out to sintered blank before the cold rolling；
In the multi-pass cold rolling, the reduction ratio before total deformation reaches 50% per pass is less than 8%；Aluminium closes after multi-pass cold rolling
The total deformation of golden plate material is 50-92%；It is aided with intermediate annealing after any a time cold rolling.
2. a kind of production method of aluminum alloy thin plate according to claim 1, it is characterised in that；
The powder pressing is formed using hydraulic single column press or four-column hydraulic press；
The sintering is carried out using vacuum hotpressing stove；
The cold rolling is completed using two rollers or four-high mill.
3. a kind of production method of aluminum alloy thin plate according to claim 1, it is characterised in that；The grain of Al alloy powder
Degree is 10-100 microns.
4. a kind of production method of aluminum alloy thin plate according to claim 1, it is characterised in that；
The pressure of Al alloy powder compression moulding is 200-400MPa；Dwell time is 8-15s；
Green compact obtained by Al alloy powder compression moulding with a thickness of 2-10mm.
5. a kind of production method of aluminum alloy thin plate according to claim 1, it is characterised in that；Green compact sintering temperature is
535-625℃；Green compact sintering pressure is 2-10MPa.
6. a kind of production method of aluminum alloy thin plate according to claim 1, it is characterised in that；
It is described to be machined as: its four circles being cut away using electric spark wire cutting machine for after the blank sintering of cylindrical steel mold pressing
Side leaves raw material of the intermediate square sintered blank as rolling；After machining, obtain with a thickness of 2-9mm square slab.
7. a kind of production method of aluminum alloy thin plate according to claim 1, it is characterised in that；
Blank anneal first is carried out to sintered blank before rolling, the temperature of annealing is 390-450 DEG C；Soaking time is 60-180min, is protected
260 DEG C or less are cooled in furnace after temperature with the speed no more than 30 DEG C/h to come out and cool down again；
Intermediate annealing is carried out after cold rolling per pass；Wherein, when total deformation is less than 50%, per pass after annealing temperature be
320-350℃；Soaking time is 90-120min, is then come out of the stove air-cooled；When total deformation be greater than 50% when, per pass after move back
Fiery system is consistent with blank anneal system；
The temperature of final annealing is 390~450 DEG C；Soaking time is 60-180min, to be not more than 30 in furnace after heat preservation
DEG C/speed of h is cooled to 260 DEG C or less and comes out and cools down again；
Plate finished product thickness final after rolling-annealing is 0.5~4.0mm.
8. a kind of production method of aluminum alloy thin plate according to claim 1, it is characterised in that；When Al alloy powder is
When adding the 2A12 Al alloy powder of 2% magnesium elements,
The green compact with a thickness of 2-10mm is obtained with the pressing pressure compression moulding of 200-400MPa；Then under vacuum conditions, in
535-625 DEG C of progress pressure sintering 90-150min；After pressure sintering, cogging is processed into a thickness of 2-9mm to strip plate；It treats
Strip plate carries out the cold rolling of at least 6 passages, is aided with an intermediate annealing between rolling per pass；After the completion of last a time cold rolling, into
Row finishing shearing and final annealing；Obtain product；Reduction ratio before total deformation reaches 50% per pass is less than 8%, always
The reduction ratio that deflection is greater than after 50% per pass is into θ angle in the direction of 10-30% and adjacent two passes, the angle θ
Value be 60-120 °；The temperature of the intermediate annealing are as follows: when total deformation is less than 50%, per pass after intermediate annealing
Temperature is 320-350 DEG C；Soaking time is 90-120min, is then come out of the stove air-cooled；When total deformation is greater than 50%, per pass
Intermediate annealing system afterwards is 390~450 DEG C, keeps the temperature 1~3h；It is cooled to 260 after heat preservation with the cooling velocity no more than 30 DEG C/h
DEG C hereinafter, coming out of the stove again air-cooled；The temperature of the final annealing is 390~450 DEG C, keeps the temperature 1~3h；To be not more than 30 after heat preservation
DEG C/cooling velocity of h is cooled to 260 DEG C hereinafter, coming out of the stove again air-cooled；Obtain the product with a thickness of 0.5~4.0mm；The product
Tensile strength is 300~410MPa.
9. a kind of production method of aluminum alloy thin plate according to claim 8, it is characterised in that；The 2A12 aluminium alloy
The granularity of powder is 250~325 mesh；Powder particle is the subsphaeroidal powder of water atomization preparation.
10. a kind of production method of aluminum alloy thin plate according to claim 8, it is characterised in that；The yield rate of product
More than or equal to 95%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111876700A (en) * | 2020-06-08 | 2020-11-03 | 中南大学 | Heat treatment process of powder metallurgy aluminum alloy cold-rolled sheet |
| CN112828037A (en) * | 2020-12-21 | 2021-05-25 | 中南大学 | Method for preparing ultrathin aluminum-magnesium layered composite material by low-temperature rolling |
| CN115305329A (en) * | 2022-07-25 | 2022-11-08 | 中铝瑞闽股份有限公司 | Preparation method of 6xxx series aluminum alloy plate strip with high surface quality |
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| CN111876700B (en) * | 2020-06-08 | 2021-12-03 | 中南大学 | Heat treatment process of powder metallurgy aluminum alloy cold-rolled sheet |
| CN112828037A (en) * | 2020-12-21 | 2021-05-25 | 中南大学 | Method for preparing ultrathin aluminum-magnesium layered composite material by low-temperature rolling |
| CN112828037B (en) * | 2020-12-21 | 2022-06-10 | 中南大学 | Method for preparing ultrathin aluminum-magnesium layered composite material by low-temperature rolling |
| CN115305329A (en) * | 2022-07-25 | 2022-11-08 | 中铝瑞闽股份有限公司 | Preparation method of 6xxx series aluminum alloy plate strip with high surface quality |
| CN115305329B (en) * | 2022-07-25 | 2023-10-27 | 中铝瑞闽股份有限公司 | Preparation method of 6xxx series aluminum alloy plate strip with high surface quality |
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