CN109022971B - A kind of powder metallurgy 2xxx aluminium alloy sheet and application - Google Patents
A kind of powder metallurgy 2xxx aluminium alloy sheet and application Download PDFInfo
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- CN109022971B CN109022971B CN201811009293.4A CN201811009293A CN109022971B CN 109022971 B CN109022971 B CN 109022971B CN 201811009293 A CN201811009293 A CN 201811009293A CN 109022971 B CN109022971 B CN 109022971B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0408—Light metal alloys
- C22C1/0416—Aluminium-based alloys
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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
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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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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Abstract
The present invention relates to a kind of powder metallurgy 2xxx aluminium alloy sheet and applications, belong to powder metallurgy preparation technology field.The present invention is combined using powder metallurgy process with solid-solution and aging heat treatment technique, and high performance 2xxx aluminium alloy sheet is prepared.Concrete operations are as follows: the powder metallurgy green body by thickness less than or equal to 1mm obtains aluminium alloy sheet in 625-675 DEG C of heat preservation 120-240min；Then it first keeps the temperature at 520-550 DEG C, then cools down, heat up after cooling and kept the temperature at 470-500 DEG C again；Then oil quenching；Multistage artificial aging is carried out after oil quenching obtains product.Products obtained therefrom good mechanical performance of the present invention；By optimization heat treatment process and oil quenching technique, yield rate ensure that while promoting product mechanical property.The present invention also realizes the exploration of the mechanical property enhancing and yield rate Synchronous lifting of powder metallurgy ultra-thin materials for the first time.An effective approach is provided for the preparation of high-performance ultrathin foil.
Description
Technical field
The invention belongs to the powder metallurgy preparation technology of aluminium alloy and Field of Heat-treatment, and in particular to a kind of 2xxx aluminium alloy
The powder metallurgy preparation of thin plate and two step solid solutions+multistage aging heat treatment technics.
Background technique
With the rise of gas price and the enhancing of people's environmental consciousness, automotive light weight technology causes people more and more to be closed
It infuses, the material alumina-base material on aircraft and automobile accounts for very big ratio.Light-weighted requirement is the aluminium base part of high specific strength
Using providing industrial prospect.Inevitably there is component segregation in conventional cast acieral, be unable to satisfy the high property of material
The requirement of energy.And powder metallurgy process can be effectively prevented from component segregation, improve solid solubility, refine crystal grain, improve aluminium alloy
Form and distribution characteristics.The characteristics of powder metallurgy process is due to near-net-shape, following process is few, and stock utilization is high, and energy
The blank of the materials such as porous, gradient, insoluble metal, ceramics can not be prepared by making up conventional casting methods.The development of modern technologies, it is right
More stringent requirements are proposed for aluminium alloy capability.The present invention in order to prepare high rigidity, high-intensitive POWDER METALLURGY ALUMINIUM ALLOYS ultra thin plate,
Aluminium alloy is prepared using powder metallurgy process, and POWDER METALLURGY ALUMINIUM ALLOYS is heat-treated, has obtained powder with high performance
Last metallurgy 2xxx aluminium alloy, can further widen its application field.
Summary of the invention
It is an object of the invention to overcome the shortcomings of existing aluminium alloy technology of preparing, in the development base of POWDER METALLURGY ALUMINIUM ALLOYS
The powder metallurgy that a kind of 2xxx aluminium alloy sheet is provided on plinth prepares and heat treatment technics, this method simple process, flexible operation,
The features such as high yield rate.
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention；The 2xxx alloy substrate by percentage to the quality, including
Following components:
Cu:3.8%-4.9%,
Mg: greater than be equal to 1.2% and be less than or equal to the content of Cu；
Mn:0.30%-1.0%,
Aluminium Al: surplus.
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention；The preparation process of the powder metallurgy 2xxx aluminium alloy sheet
Include the following steps:
Step 1
2xxx alloy powder is chosen by design component to mix with the sintering aid of 0.2-3wt.%, preferably 0.5-1.5wt.%
Standby material is obtained after uniformly；
Step 2
By pressing mode, standby material is made the green compact that thickness is less than or equal to 1mm, when compacting, control forming pressure is
150-400MPa, dwell time 15-30s；
Step 3
Under protective atmosphere, green compact obtained by step 2 is sintered, powder metallurgy 2xxx alloy is obtained；The sintering
Temperature is 625-675 DEG C；
Step 4
Powder metallurgy 2xxx alloy obtained by step 3 is put into heat-treatment furnace；Under protective atmosphere；First it is warming up to 520-
550 DEG C of heat preservation 60-120min；Then 100 DEG C and less are cooled to；It is warming up to 470-500 DEG C of heat preservation 60-120min again；
Thin stock after to solution treatment；
Thin stock after solution treatment is quickly quenched in 50-80 DEG C of quenching oil, keeps the temperature 0-10min；After obtaining oil quenching
Thin stock；Thin stock is no more than 20s from the time being transferred in quenching oil in heat-treatment furnace；Or；Thin stock after solution treatment is quick
It is transferred in spray chamber；Quenching oil is uniformly sprayed to thin stock surface；Thin stock after obtaining oil quenching；The temperature of the quenching oil is
50-80℃；Thin stock is transferred to since heat-treatment furnace spray chamber and spray quenching oil time be less than or equal to 20s；
Step 5
Under protective atmosphere；Thin stock after oil quenching is placed again into progress two-stage time effect processing in heat-treatment furnace, it is described double
The system of grade ageing treatment are as follows: first in 230-250 DEG C of heat preservation 30-120min, then in 180-200 DEG C of heat preservation 120-480min；
It cools to room temperature with the furnace later, obtains finished product.
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention；In step 1,
Each raw material is matched with powdered form to be taken；Its partial size is 8-15 μm, and sphericity is more than or equal to 90%.The too big meeting of powder diameter
The quality of ultra-thin green compact and ultra-thin finished product is influenced, the yield rate of product can be especially reduced.
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention；In step 1,
Each raw material powder is matched as requested in the ball grinder for taking and being placed in atmosphere protection, corresponding three-dimensional blender is placed on
In machine or V-type batch mixer, with the revolving speed of 20-40r/min, mixing time 180-720min, ratio of grinding media to material 5:1-10:1；It is mixed
Close uniform standby material.
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention, in step 1, the sintering aid is submicron order Mg powder.This
Mg is added in finished product by way of being introduced into twice in invention preferred embodiment, this is conducive to the yield rate for promoting product.
The ratio for especially controlling the introduction volume of Mg twice and the two, cooperates the compacting, solid solution, quenching, aging treatment process in later period,
The performance of product can not only be obviously improved, moreover it is possible to control yield rate 90% or more.
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention, in step 2, when compacting, control forming pressure is 150-
400MPa, dwell time 15-30s.
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention in step 3, under protective atmosphere, uses 5-15 first
DEG C/heating rate of min is warming up to 280-320 DEG C, 15-60min is kept the temperature, is then warming up to the heating rate of 5-15 DEG C/min
625-675 DEG C, 120-240min is kept the temperature, loads 0-10MPa pressure in insulating process；With the drop of 5-15 DEG C/min after the completion of heat preservation
Warm rate cools the temperature to 280-320 DEG C of heat preservation, cools to room temperature with the furnace after heat preservation；Obtain powder metallurgy 2xxx alloy.
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention, in step 3, the protective atmosphere is vacuum atmosphere, described
The vacuum degree of vacuum atmosphere is 1 × 10-2~1 × 10-6Pa。
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention, is put into heat for the powder metallurgy 2xxx aluminium alloy being prepared
Two step solid solutions are carried out in treatment furnace in favor of Al2Cu and Al2The abundant precipitation of second phase such as CuMg, the liquid phase of precipitation can be used for filling out
Powder particle gap is filled in favor of improving the consistency of sintered body, and argon gas is poured after heat-treatment furnace is vacuumized or nitrogen carries out
Protection, first in 520-550 DEG C of heat preservation 60-120min, heats up after cooling to 100 DEG C in 470-500 DEG C of heat preservation 60- again
120min。
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention, by the thin stock fast transfer after solution treatment to spray chamber
In；Quenching oil is uniformly sprayed to thin stock surface；Thin stock after obtaining oil quenching；The spray rate of quenching oil are as follows:: 0.01-0.5L/
s.cm2, preferably 0.05-0.3L/s.cm2, further preferably 0.08-0.3L/s.cm2。
It is quenched compared to being directly placed into quenching oil, there is better advantage using spray quenching.In particular for
(thickness is less than or equal to 1mm to large-scale sheet, and size is more than or equal to 5024mm2) for, the control of spray parameters of quenching appropriate,
The yield rate of product can be substantially improved.The probability of occurrence of cracking, fold is dropped into an extremely low level.Meanwhile optimizing spray
Speed can also suitably promote the mechanical property of product.In the present invention, fountain height is it is to be understood that in 1 second every square centimeter
The amount of the quenching oil of sprinkling.
The thickness of a kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention, finished product is less than or equal to 1mm.The single side of finished product simultaneously
Surface area be more than or equal to 5024mm2。
A kind of powder metallurgy preparation of 2xxx aluminium alloy sheet of the present invention and heat treatment technics；By the aluminium alloy after oil quenching
It is placed again into progress two-stage time effect processing in heat-treatment furnace, plays precipitation second-phase dispersion extra at granule boundary into matrix
To the effect of dispersion-strengtherning, argon gas is poured after heat-treatment furnace is vacuumized or nitrogen is protected, in 230-250 DEG C and 180-
The multistage artificial aging of 30-120min and 120-480min is carried out at 200 DEG C respectively；It cools to room temperature with the furnace later, is heat-treated
Process terminates.
It present invention can be suitably applied to the preparation and heat treatment process of larger size powder metallurgy 2xxx aluminium alloy, and the technology
It can also prepare provide for the powder metallurgy of other materials and certain instruct thinking.
A kind of powder metallurgy 2xxx aluminium alloy sheet of the present invention；The application of the powder metallurgy 2xxx aluminium alloy sheet, packet
It includes and is used for aerospace, automobile manufacturing field.
Advantage
One, the present invention can be prepared that crystal grain is tiny, the higher powder of mechanical property by regulating and controlling system of heat treatment process
Last metallurgy aluminium alloy；
Two, preparation process of the present invention is simple, at low cost, is applicable to the preparation of larger size powder metallurgy 2xxx aluminium alloy
And heat treatment, and extend to the development of other similar material；
Three, the present invention designed by technique make the present invention there is no the component segregations of dissimilar material, so as to have
The application field of effect broadening similar material.
Four, the present invention by twice introduce Mg, cooperation compacting, solid solution, quenching, aging treatment process, by thin layer (be less than etc.
In 1mm) yield rate of product has been promoted to 90% or more, preferably after, can be 95% or more.
Detailed description of the invention
Fig. 1 is the stretching fracture pattern of heat treated sample in embodiment 1；
Fig. 2 is the stretching fracture pattern of heat treated sample in embodiment 2；
Fig. 3 is the stretching fracture pattern of heat treated sample in embodiment 3.
Specific embodiment
With reference to the accompanying drawings and detailed description, to a kind of powder metallurgy preparation of 2xxx aluminium alloy sheet of the present invention and
Heat treatment technics and application are described further.
Quenching oil used is market purchase in the embodiment of the present invention；Its producer and model are as follows: Dezhou Cisco industrial media
The quick bright quenc hing oil of the senco-o20 of Co., Ltd.
Embodiment 1
POWDER METALLURGY ALUMINIUM ALLOYS used in heat treatment process is mainly prepared by following steps in the invention；
Step 1
With Al alloy powder (granularity is 5-10 μm of 2A12 Al alloy powder) and magnesium powder (0.2-03 μm) etc. for raw material, by powder
End is packed into batch mixer and is uniformly mixed；Ratio of grinding media to material 1:2, mixing time 8h.Wherein the quality of magnesium powder is Al alloy powder quality
1%.
Step 2
By the powdering in φ 80mm mold, unidirectional cold-press moulding, the forming according to design requirement of raw material powder obtained by step 1
Pressure 200MPa, the dwell time, 20s obtained green body；Green body with a thickness of 0.7mm.
Step 3
By aluminium alloy green body obtained by step 2, under vacuum atmosphere, it is warming up to first using the heating rate of 10 DEG C/min
300 DEG C, then heat preservation is warming up to 650 DEG C with the heating rate of 5 DEG C/min, keeps the temperature 180min, loads 10MPa in insulating process
Pressure；300 DEG C are cooled the temperature to the rate of temperature fall of 5 DEG C/min after the completion of heat preservation, heat preservation, with being furnace-cooled to room temperature after heat preservation.Institute
The vacuum degree for stating vacuum environment is 2 × 10-2Pa。
Performance characterization, hardness 78HV are carried out to material made above, material tensile property is 223MPa.
Step 4
The aluminium alloy that step 3 is prepared is put into heat-treatment furnace, is filled with argon gas after vacuumizing, using 10 DEG C/min
Heating rate heat-treatment furnace is warming up to 530 DEG C of heat preservation 90min, then when temperature drops to 100 DEG C use 5 DEG C/min liter
Heat-treatment furnace is warming up to 490 DEG C and keeps the temperature 90min by warm rate；
Step 5
Aluminium alloy rapid quenching after heat preservation is entered in 30 DEG C of oil, keeps the temperature 2min；
Step 6
Aluminium alloy block after oil quenching is placed again into heat-treatment furnace, is filled with argon gas after vacuumizing, using 10 DEG C/min
Heating rate heat-treatment furnace is warming up to 240 DEG C of heat preservation 90min, be then cooled to the heating speed after room temperature using 5 DEG C/min
Furnace temperature is raised to 190 DEG C of heat preservation 240min by rate again；
Step 7: cooling to room temperature with the furnace after heat preservation, takes out sample after completing heat treatment process.
Performance measurement, sample rate 2.69g/cm are carried out to aluminium alloy obtained by present embodiment3, thickness of sample
0.67mm, hardness 113HV, material tensile property are 365MPa.
It repeats aforesaid operations 100 times, the yield rate of product is 93%.The yield statistics mode of product in the present invention
For；It chooses and is not less than 100 samples, there is no obvious crackle, fold, as qualified products in sample；Yield rate=qualification produces
Product number/sample number * 100%.
Stretching fracture scanning result is shown in attached drawing 1.
Embodiment 2
Step 1 is consistent with embodiment 1 to step 3；It is with place；
Step 4: obtained aluminium alloy made above is put into heat-treatment furnace, argon gas is filled with after vacuumizing, using 10
DEG C/heat-treatment furnace is warming up to 540 DEG C of heat preservation 120min by the heating rate of min, then when temperature drops to 100 DEG C using 5 DEG C/
Heat-treatment furnace is warming up to 490 DEG C and keeps the temperature 120min by the heating rate of min；
Step 5: the aluminium alloy rapid quenching after heat preservation being entered in 30 DEG C of oil, keeps the temperature 2min；
Step 6: the aluminium alloy block after oil quenching is placed again into heat-treatment furnace, argon gas is filled with after vacuumizing, using 10
DEG C/heat-treatment furnace is warming up to 240 DEG C of heat preservation 90min by the heating rate of min, it is then cooled to after room temperature using 5 DEG C/min's
Furnace temperature is raised to 190 DEG C of heat preservation 240min by heating rate again；
Step 7: cooling to room temperature with the furnace after heat preservation, takes out sample after completing heat treatment process.
Performance measurement, sample rate 2.71, thickness of sample 0.64mm, hardness are carried out to aluminium alloy obtained by present embodiment
128HV, material tensile property are 382MPa.
It repeats aforesaid operations 100 times, the yield rate of product is 93.5%.
Stretching fracture scanning result is shown in attached drawing 2
Embodiment 3
Step 1 is consistent with embodiment 1 to step 3；It is with place；
Step 4: obtained aluminium alloy made above is put into heat-treatment furnace, argon gas is filled with after vacuumizing, using 10
DEG C/heat-treatment furnace is warming up to 540 DEG C of heat preservation 120min by the heating rate of min, then when temperature drops to 100 DEG C using 5 DEG C/
Heat-treatment furnace is warming up to 490 DEG C and keeps the temperature 120min by the heating rate of min；
Step 5: the aluminium alloy rapid quenching after heat preservation being entered in 30 DEG C of oil, keeps the temperature 2min；
Step 6: the aluminium alloy block after oil quenching is placed again into heat-treatment furnace, argon gas is filled with after vacuumizing, using 10
DEG C/heat-treatment furnace is warming up to 240 DEG C of heat preservation 120min by the heating rate of min, it is then cooled to after room temperature using 5 DEG C/min's
Furnace temperature is raised to 195 DEG C of heat preservation 360min by heating rate again；
Step 7: cooling to room temperature with the furnace after heat preservation, takes out sample after completing heat treatment process.
Performance measurement, sample rate 2.71, thickness of sample 0.65mm, hardness are carried out to aluminium alloy obtained by present embodiment
119HV, material tensile property are 373MPa.
It repeats aforesaid operations 100 times, the yield rate of product is 94%.
Stretching fracture scanning result is shown in attached drawing 3
Embodiment 4-12；
Other operations are consistent with embodiment 3, the difference is that；In step 5, the thin stock after solution treatment is quickly turned
It moves in spray chamber；Quenching oil is uniformly sprayed to thin stock surface；Thin stock after obtaining oil quenching；The spray rate of quenching oil is successively
Are as follows: 0.01L/s.cm2、0.03L/s.cm2、0.05L/s.cm2、0.07L/s.cm2、0.09L/s.cm2、0.1L/s.cm2、0.2L/
s.cm2、0.3L/s.cm2、0.5L/s.cm2；The yield rate of product is followed successively by 97%, 96%, 96%, 96%, 96%, 96%,
95%, 94%, 90%.It follows that spray rate is preferable are as follows: 0.01L/s.cm2、0.03L/s.cm2、0.05L/s.cm2、
0.07L/s.cm2、0.09L/s.cm2、0.1L/s.cm2、0.2L/s.cm2、0.3L/s.cm2；But the mechanical property of testing product is sent out
It is existing, 0.01L/s.cm2When, the mechanical property (intensity 345MPa) of product is much worse than the product of other preferred spray rates.
Wherein spray rate are as follows: 0.05L/s.cm2、0.07L/s.cm2、0.09L/s.cm2、0.1L/s.cm2、0.2L/
s.cm2、0.3L/s.cm2The tensile strength of products obtained therefrom is 376-390MPa.
0.5L/s.cm2Spray rate easily causes product surface to damage；The general of face crack is generated during spray simultaneously
Rate is sharply increased compared to other spray rates.
Comparative example 1
Other conditions are consistent with embodiment 2, and the aluminium alloy of step 3 is placed directly within natrual ageing 48h in air, obtains
Material hardness and tensile property are respectively 95HV and 312MPa.Yield rate and implementation 2 are almost the same.
Comparative example 2
Other conditions are consistent with embodiment 2, and water quenching, obtained material hardness 106HV are utilized in the quenching process of step 2
With tensile property be respectively and 319MPa.Yield rate is only 85%.
Comparative example 3
Other conditions are consistent with embodiment 2, the difference is that being added without cosolvent Mg；The hardness and stretching of products obtained therefrom
Performance is respectively 109HV and 331MPa.And the yield rate of product is also only 87%.
Claims (9)
1. a kind of powder metallurgy 2xxx aluminium alloy sheet；It is characterized in that；The powder metallurgy 2xxx aluminium alloy sheet is with quality
Percentages, including following components:
Cu:3.8%-4.9%,
Mg: greater than be equal to 1.2% and be less than or equal to the content of Cu；The Mg is that finished product is added to by way of introducing twice
In；
Mn:0.30%-1.0%,
Aluminium Al: surplus；
The preparation process of the powder metallurgy 2xxx aluminium alloy sheet includes the following steps:
Step 1
Standby material is obtained after mixing by the sintering aid that design component chooses 2xxx alloy powder and 0.2-3wt.%；It is described to help
Burning agent is submicron order Mg powder；
Step 2
By pressing mode, standby material is made the green compact that thickness is less than or equal to 1mm, when compacting, control forming pressure is 150-
400MPa, dwell time 15-30s；
Step 3
Under protective atmosphere, green compact obtained by step 2 is sintered, powder metallurgy 2xxx alloy is obtained；The temperature of the sintering
It is 625-675 DEG C；
Step 4
Powder metallurgy 2xxx alloy obtained by step 3 is put into heat-treatment furnace；Under protective atmosphere；First it is warming up to 520-550 DEG C
Keep the temperature 60-120min；Then 100 DEG C and less are cooled to；It is warming up to 470-500 DEG C of heat preservation 60-120min again；It is dissolved
Treated thin stock；
Thin stock after solution treatment is quickly quenched in 50-80 DEG C of quenching oil, keeps the temperature 0-10min；Thin stock after obtaining oil quenching；
Thin stock is no more than 20s from the time being transferred in quenching oil in heat-treatment furnace；Or；Extremely by the thin stock fast transfer after solution treatment
In spray chamber；Quenching oil is uniformly sprayed to thin stock surface；Thin stock after obtaining oil quenching；The temperature of the quenching oil is 50-80
℃；Thin stock is transferred to since heat-treatment furnace spray chamber and spray quenching oil time be less than or equal to 20s；
Step 5
Under protective atmosphere；Thin stock after oil quenching is placed again into heat-treatment furnace progress two-stage time effect processing, when the twin-stage
Imitate the system of processing are as follows: first in 230-250 DEG C of heat preservation 30-120min, then in 180-200 DEG C of heat preservation 120-480min；Later
It cools to room temperature with the furnace, obtains finished product.
2. a kind of powder metallurgy 2xxx aluminium alloy sheet according to claim 1, it is characterised in that: in step 1,
Each raw material is matched with powdered form to be taken；Its partial size is 8-15 μm, and sphericity is more than or equal to 90%；
Each raw material powder is matched as requested in the ball grinder for taking and being placed in atmosphere protection, be placed on corresponding three-dimensional material mixer or
In person's V-type batch mixer, with the revolving speed of 20-40r/min, mixing time 180-720min, ratio of grinding media to material 5:1-10:1；It is equal to obtain mixing
Even standby material.
3. a kind of powder metallurgy 2xxx aluminium alloy sheet according to claim 1；It is characterized by: being protected in step 3
It protects under atmosphere, is warming up to 280-320 DEG C using the heating rate of 5-15 DEG C/min first, 15-60min is kept the temperature, then with 5-15
DEG C/heating rate of min is warming up to 625-675 DEG C, 120-240min is kept the temperature, loads 0-10MPa pressure in insulating process；Heat preservation
280-320 DEG C of heat preservation is cooled the temperature to the rate of temperature fall of 5-15 DEG C/min after the completion, cools to room temperature with the furnace after heat preservation；It obtains
Powder metallurgy 2xxx alloy.
4. a kind of powder metallurgy 2xxx aluminium alloy sheet according to claim 1；It is characterized by: in step 3, it is described
Protective atmosphere is vacuum atmosphere, and the vacuum degree of the vacuum atmosphere is 1 × 10-2~1 × 10-6Pa。
5. a kind of powder metallurgy 2xxx aluminium alloy sheet according to claim 1；It is characterized by: in step 4；It will consolidate
Molten treated thin stock fast transfer is into spray chamber；Quenching oil is uniformly sprayed to thin stock surface；Thin stock after obtaining oil quenching；
The spray rate of quenching oil are as follows: press 0.01-0.5L/s.cm2。
6. a kind of powder metallurgy 2xxx aluminium alloy sheet according to claim 5；It is characterized by: the spray speed of quenching oil
Degree is 0.05-0.3L/s.cm2。
7. a kind of powder metallurgy 2xxx aluminium alloy sheet according to claim 5；It is characterized by: the spray speed of quenching oil
Degree is 0.08-0.3L/s.cm2。
8. a kind of powder metallurgy 2xxx aluminium alloy sheet according to claim 5；It is characterized by: the thickness of finished product is less than
Equal to 1mm.
9. a kind of application of the powder metallurgy 2xxx aluminium alloy sheet as described in claim 1-8 any one；It is characterized by:
The application of the powder metallurgy 2xxx aluminium alloy sheet, including it is used for aerospace, automobile manufacturing field.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889402A (en) * | 2015-06-05 | 2015-09-09 | 东睦新材料集团股份有限公司 | Production method of aluminum-based powder metallurgy parts |
| CN105063438A (en) * | 2015-08-14 | 2015-11-18 | 中南大学 | Manufacturing method for high-copper-silicon magnesium powder metallurgy aluminum alloy |
| CN107829003A (en) * | 2017-11-09 | 2018-03-23 | 北京科技大学 | A kind of method that aluminum alloy spare part is prepared using powder metallurgic method |
| CN108315615A (en) * | 2018-03-27 | 2018-07-24 | 中南大学 | A kind of rare earth oxide strengthens powder metallurgy Al-Cu-Mg alloy and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104889402A (en) * | 2015-06-05 | 2015-09-09 | 东睦新材料集团股份有限公司 | Production method of aluminum-based powder metallurgy parts |
| CN105063438A (en) * | 2015-08-14 | 2015-11-18 | 中南大学 | Manufacturing method for high-copper-silicon magnesium powder metallurgy aluminum alloy |
| CN107829003A (en) * | 2017-11-09 | 2018-03-23 | 北京科技大学 | A kind of method that aluminum alloy spare part is prepared using powder metallurgic method |
| CN108315615A (en) * | 2018-03-27 | 2018-07-24 | 中南大学 | A kind of rare earth oxide strengthens powder metallurgy Al-Cu-Mg alloy and preparation method thereof |
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