CN109487184A - A kind of artificial aging state high strength alumin ium alloy recurrence forming synchronous process - Google Patents
A kind of artificial aging state high strength alumin ium alloy recurrence forming synchronous process Download PDFInfo
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- CN109487184A CN109487184A CN201811624579.3A CN201811624579A CN109487184A CN 109487184 A CN109487184 A CN 109487184A CN 201811624579 A CN201811624579 A CN 201811624579A CN 109487184 A CN109487184 A CN 109487184A
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- artificial aging
- high strength
- aging state
- alumin ium
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
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- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The present invention provides a kind of artificial aging state high strength alumin ium alloy recurrence forming synchronous process, press forming die is cleaned first and artificial aging state aluminium alloy is placed on mold, it is above between 120-160 DEG C that plate is heated rapidly to artificial aging temperature using electromagnetic induction or conductive heater, held for some time, soaking time controlled in 20-60 seconds, and it is stamping in this process, the component after forming is air-cooled to room temperature, subsequent according to demand to can proceed with artificial aging intensive treatment.The present invention can significantly improve alloy punching formability at a lower temperature, i.e., high strength alumin ium alloy is set to improve its formability efficiency while guaranteeing material property, which is conducive to the shape Collaborative Control of high-strength alloy, can be used for the manufacture of the parts such as automobile, aerospace, ships.
Description
Technical field
The invention belongs to metal material processing technical field, in particular to a kind of artificial aging state high strength alumin ium alloy return at
Just as step process.
Background technique
Aluminium alloy has many advantages, such as that density is low, plasticity is good, corrosion resistance is strong, and resource relative abundance can be processed into various
Profile, plate etc. have excellent electric conductivity, thermal conductivity and corrosion stability, are industrially widely used.2xxx system, 6xxx system
The precipitation that solute atoms after solution hardening is formed in ag(e)ing process is mainly derived from the intensity of the wrought aluminium alloy of 7xxx series
Phase, therefore aging technique is most important to excellent mechanical property is obtained.High strength alumin ium alloy plate room temperature elongation percentage is lower, it is difficult to
Using process formings such as conventional cold stampings, generally require at relatively high temperatures using hot press-formed.Existing hot stamping method
In order to guarantee the intensity of good formability and part, process is relatively complicated, and blank is first generally reheated to solid solution temperature
Simultaneously held for some time is spent, shaping dies is transferred to and carries out hot forming, shaping dies need to be equipped with heated for controlling temperature system and heat-insulated dress
It sets.Although aluminium alloy forming capacity is substantially improved under high temperature, intensity is very low, it is easy to scratch surface.In addition it is needed after cooling down
Continue longer artificial aging to obtain sufficient intensity, and it is cooling slow when alloy in will form coarse precipitated phase, supersaturation
Degree reduces, and subsequent artefacts' ageing strengthening effect weakens.Therefore requirement of the technique to mold is very high, needs built-in cooling system.
This process is complicated, and the production cycle is long, and production cost is higher.Therefore, need to seek one kind can reduce cost, improve figuration manufacture
Efficiency and the manufacturing process that plate property can be kept.
In order to improve the press formability of high strength alumin ium alloy, current solution is mainly by being heated to higher temperature
It is shaped after held for some time.Such as Authorization Notice No. is patent of invention " the aluminum alloy plate materials punch forming of CN104117562B
Method " proposes a kind of aluminium alloy impact forming method, which is heated to 495-500 DEG C for plate first, keeps the temperature 30-60 minutes
Rapid water quenching afterwards, and punch forming is completed within the scope of 250-290 DEG C in 8 hours.Punching press can be reduced to a certain extent
The problem of abrading, deform and cracking in forming process.But the same complex steps of the technique, need workpiece being first to heat to higher temperatures
Reshaping after degree water quenching cooling, energy consumption are higher.A kind of patent of invention " lightweight aluminium conjunction of domestic Publication No. CN108380722A
The hot press-formed method of golden bodywork component " proposes a kind of T6 state aluminum alloy heat press-processing method, by T6 state aluminium alloy plate
Material, which is placed in heating equipment, is heated and is kept the temperature 1-5min, and wherein heating temperature ratio T6 state aluminum alloy plate materials solid solubility temperature is low
It 50-300 DEG C, plate is taken out and is transferred in stamping die in 7s carries out stamping, pressure maintaining quenches in mold later
Obtain final product.This method, without continuing heat treatment reinforcement, saves process time, improves production effect after stamping
Rate.But be transferred quickly in shaping dies again after needing to heat plate, process is still complicated.In addition heating temperature still compared with
The high and time is longer, is likely to result in the roughening of T6 state alloy precipitated phase, reduced performance.Domestic Publication No. CN106583489A's
Patent of invention " high strength alumin ium alloy plate returns forming integrated technique " proposes that a kind of recurrence by high strength alumin ium alloy plate is handled
With the stamping combination process combined.The high strength alumin ium alloy that the invention handles T6 is between aging temp and solid solubility temperature
Heating and thermal insulation is completed to return processing 5-10 minutes, and quickly molding is completed forming and is quickly cooled down, part after plate is put into mold
Conventional ageing treatment is carried out after forming again.Recurrence in aluminium sheet RRA technique is handled and is combined with stamping by the technique, can be with
Energy consumption is reduced to a certain extent, shortens manufacturing process.But the technique is only applicable to artificial aging lack time effect state plate, forming temperature
Still the higher and time is longer, faces the problem same as CN108380722A patent.
In the stamping production of existing aluminum alloy plate materials, require for plate to be first to heat to higher temperature heat preservation substantially
Certain time, then certain temperature forming is cooled to by cooling device, forming is likely to result in plate cracking, becomes at these elevated temperatures
Shape, precipitated phase roughening, reduced performance etc., and such process efficiency is lower, energy consumption is larger.In conclusion development technology is easy
The technique of the low-cost raising aluminium alloy formability convenient for practical application is extremely important to production high-quality aluminum alloy component.
Summary of the invention
In order to overcome the disadvantages of the above prior art, the purpose of the present invention is to provide a kind of heat-treatable strengthened artificial
Aging state high strength alumin ium alloy returns forming synchronous process, can significantly improve alloy punching formability at a lower temperature, that is, make
High strength alumin ium alloy improves its formability efficiency while guaranteeing material property, which is conducive to the shape of high-strength alloy
Collaborative Control can be used for the manufacture of the parts such as automobile, aerospace, ships.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of artificial aging state high strength alumin ium alloy recurrence forming synchronous process, first cleaning press forming die simultaneously will be artificial
Aging state aluminum alloy plate materials are placed on mold, and plate is heated rapidly to artificial aging temperature using electromagnetic induction or conductive heater
Spend or more between 120-160 DEG C, held for some time, soaking time control strikes out in 20-60 seconds, and in insulating process
Shape, the component after forming are air-cooled to room temperature.
The high strength alumin ium alloy refers mainly to the apparent 7xxx system of aging hardening effect, 2xxx system and 6xxx system alloy.
The artificial aging state refer to lack time effect between peak value artificial aging state, aging temp generally 60-200 DEG C it
Between.
The time of the heat temperature raising is usually no more than 20 seconds.
It is described be heated to 120 DEG C before heating speed more preferably greater than 20 DEG C/sec.
The stamping speed is preferably 0.01-10s-1。
After the component is air-cooled to room temperature, artificial aging intensive treatment can proceed with according to demand.
Compared with prior art, the beneficial effects of the present invention are:
The above-mentioned aluminium alloy being placed at room temperature for passes through solution hardening processing and artificial aging in material manufacturer, is dissolved at this time
Quenched solute atoms has formed precipitated phase in ag(e)ing process.The elements such as zinc, copper and magnesium be high strength alumin ium alloy such as 7xxx system and
The main alloy element of 2xxx system addition, the just analysis with these elements during heat treatment of the age-hardening potentiality of such alloy
It is related out.These elements are precipitated from supersaturated solid solution after keeping the temperature at a certain temperature, to achieve the effect that precipitation strength.
In order to improve aluminium alloy element forming capacity and the final mechanical property that obtains, it is necessary to make artificial aging by certain technique
State alloy rigidity reduces.Machining factory lacks corresponding equipment, is not generally possible to that aluminium alloy is dissolved and is quenched again again
Fire.The difficulty for reshaping processing by high temperature recurrence is also quite large, controls improper aluminium alloy and is easy overaging, this can not only make aluminium
Alloy is more difficult to process, the effect that can also inhibit subsequent ageing treatment to strengthen.
Present system have studied artificial aging precipitated phase in high strength alumin ium alloy plate in the stability of each temperature and
Back dissolving and the competitive relation being precipitated again propose suitable artificial aging state high strength alumin ium alloy plate and return the synchronous forming side of forming
Method (heat treatment method of the invention), can be improved above-mentioned aluminium alloy formability and subsequent curing potentiality.Heated
Direct forming can be further improved the forming efficiency of aluminium alloy in journey, it is subsequent can also be enabled aluminum alloy to using air and grinding tool it is cold
But, energy consumption is saved.Intensity is maintained after forming, can no longer carry out artificial aging.
Compared with prior art, present invention has an advantage that
1, compared with Traditional heating devices, electromagnetic induction heating uses contactless heating method, and heating speed is fast, temperature
Degree is easy to control, safe and efficient, stable product quality, easy control of temperature, is limited less heating condition, factory easy to accomplish is big
Large-scale production.
2, by Optimum Temperature Raising mode and heating process, the present invention can efficiently control time of precipitated phase in artificial aging
Molten and precipitation process again is inventing the holding temperature and intensity can will not lose in this way from 300MPa is reduced in the time
The intensity of alloy promotes its forming capacity simultaneously, in turn ensures that forming process precipitated phase is not easy to be roughened.After forming intensity compared with
Height, can carry out artificial aging as needed, after forming can also no longer carry out artificial aging.
3, heat treatment method of the present invention can carry out in existing Forming Equipments, be not required to add new heat treatment
Equipment；It is suitble to the aluminum alloy complex exemplar of actual production；Forming temperature is lower and has larger temperature window, and process controllability is strong,
It is easy to guarantee stable product quality, does not will cause precipitated phase and grain coarsening, reduced performance.
4, present invention direct forming while aluminium alloy heating and thermal insulation, the figuration manufacture time is short, can also utilize air
It enables aluminum alloy to cool down with grinding tool, does not need specially to design the shaping dies with cooling system, reduce die cost.
5, technique provided by the invention can improve the forming capacity of high strength alumin ium alloy, be convenient for shape Collaborative Control, be promoted
The quality of articles made of aluminium alloy.
Detailed description of the invention
Fig. 1 is present invention process flow diagram.
Specific embodiment
It is said that it is bright further to illustrate line number of going forward side by side to the method for the present invention below in conjunction with case study on implementation, but the present invention is not limited to
These embodiments.Room temperature of the present invention is generally between 0 DEG C -30 DEG C.
With reference to Fig. 1, in the embodiment of the present invention, cleaning press forming die and artificial aging state aluminium alloy is placed in first
On mold, plate is heated to artificial aging temperature or more (generally in 20 seconds) rapidly using electromagnetic induction or conductive heater
Between 120-160 DEG C, held for some time, soaking time was controlled in 20-60 seconds, and stamping in this process, after forming
Component be air-cooled to room temperature, it is subsequent according to demand to can proceed with artificial aging intensive treatment.
Embodiment sample used is commercial 7075 high-strength alloys.Alloy rigidity test is enterprising in Vickers hardness tester
Row, experiment load are 4.9N, duration 15s.GB/T 7314-2005 carries out Metal Compressing Experiments according to national standards.
Following embodiment is devised based on considerations above:
Comparative example 1
After 7075 aluminium alloys carry out solution treatment water quenching in air circulation resistance furnace, aluminum alloy plate materials are obtained；Again at 120 DEG C
It is lower to place 1h, 12h respectively and carry out compression test afterwards for 24 hours.
Embodiment 1
After 7075 aluminium alloys carry out solution treatment water quenching in air circulation resistance furnace, aluminum alloy plate materials are obtained；Again at 120 DEG C
It is lower to place 1h respectively, then using electromagnetic induction heating to 250 DEG C of heat preservations 30 seconds, 1 minute, 2 minutes, plate holding stage into
The test of row hot compression, it is cooling to then take out room temperature.
Embodiment 2
After 7075 aluminium alloys carry out solution treatment water quenching in air circulation resistance furnace, aluminum alloy plate materials are obtained；Again at 120 DEG C
It is lower to place 12h respectively, then using electromagnetic induction heating to 250 DEG C keep the temperature 30 seconds, plate holding stage carry out hot compression survey
It is cooling to then take out room temperature for examination.
Embodiment 3
After 7075 aluminium alloys carry out solution treatment water quenching in air circulation resistance furnace, aluminum alloy plate materials are obtained；Again at 120 DEG C
It is lower to place respectively for 24 hours, then using electromagnetic induction heating to 250 DEG C keep the temperature 30 seconds, plate holding stage carry out hot compression survey
It is cooling to then take out room temperature for examination.
Embodiment 4
After 7075 aluminium alloys carry out solution treatment water quenching in air circulation resistance furnace, aluminum alloy plate materials are obtained；Again at 120 DEG C
It is lower to place 12h respectively, then using electromagnetic induction heating to 280 DEG C keep the temperature 30 seconds, plate holding stage carry out hot compression survey
It is cooling to then take out room temperature for examination.
Embodiment 5
After 7075 aluminium alloys carry out solution treatment water quenching in air circulation resistance furnace, aluminum alloy plate materials are obtained；Again at 120 DEG C
It is lower to place respectively for 24 hours, then using electromagnetic induction heating to 280 DEG C keep the temperature 30 seconds, plate holding stage carry out hot compression survey
It is cooling to then take out room temperature for examination.
Embodiment 6
After 7075 aluminium alloys carry out solution treatment water quenching in air circulation resistance furnace, aluminum alloy plate materials are obtained；Again at 120 DEG C
It is lower to place 12h respectively, then using electromagnetic induction heating to 250 DEG C keep the temperature 30 seconds, plate is deformed in holding stage, then
It takes out air cooling and carries out room temperature compression test.
Table 1 is the compression performance test value after comparative example difference artificial aging process, above embodiments counterpoise
It is 3 times or more multiple.As it can be seen that the alloy strength of artificial aging is big, elongation percentage is low, is not suitable for figuration manufacture.
Compression performance after 1 comparative example of table, 1 process
| 1 hour | 12 hours | 24 hours | |
| Yield strength | 489MPa | 561MPa | 589MPa |
| Ultimate strength | 596MPa | 622MPa | 630MPa |
| Elongation after fracture | 18% | 12% | 11% |
Compression performance after the different soaking times of 2 embodiment of table 1 after corresponding process
| 30 seconds | 1 minute | 2 minutes | |
| Yield strength | 202MPa | 216MPa | 256MPa |
| Ultimate strength | 312MPa | 313MPa | 309MPa |
| Elongation after fracture | 70% | 71% | 70% |
Compression performance after 3 comparative example 1 of table process corresponding with embodiment 2-4
Table 2 and table 3 show the effect of comparative example (the method for the present invention), it is seen that the alloy strength of different artificial aging states
It is greatly lowered, reaches as high as 300MPa or more, elongation percentage promotes 3 times, is very suitable to stamping.In addition, by embodiment 4
It is found that the intensity of alloy is very high without subsequent artefacts' ageing treatment after forming.
In summary, synchronous treatment process, artificial aging aluminium alloy recurrence processing are shaped using recurrence proposed by the present invention
Alloy yield strength can decline 300MPa after 30 seconds, and alloy elongation percentage, which also has, significantly to be promoted, and be readily formed manufacture.The technique
Aluminium alloy does not need certain moduli tool cooling after processing, very big without subsequent aging strength.The present invention can be mentioned significantly
Aluminium alloy forming capacity is risen, and can guarantee sufficient intensity, therefore is convenient for shape Collaborative Control, promotes aluminum alloy complex product
Quality.
Claims (7)
1. a kind of artificial aging state high strength alumin ium alloy returns forming synchronous process, which is characterized in that cleaning stamping forming die first
Have and artificial aging state aluminum alloy plate materials are placed on mold, is heated rapidly to plate using electromagnetic induction or conductive heater
Artificial aging temperature is above between 120-160 DEG C, held for some time, and soaking time controlled in 20-60 seconds, and was keeping the temperature
Stamping in journey, the component after forming is air-cooled to room temperature.
2. artificial aging state high strength alumin ium alloy returns forming synchronous process according to claim 1, which is characterized in that the height
Strength aluminum alloy refers mainly to the apparent 7xxx system of aging hardening effect, 2xxx system and 6xxx system alloy.
3. artificial aging state high strength alumin ium alloy returns forming synchronous process according to claim 1, which is characterized in that the people
Work aging state refers to lack time effect between peak value artificial aging state, and aging temp is between 60-200 DEG C.
4. artificial aging state high strength alumin ium alloy returns forming synchronous process according to claim 1, which is characterized in that described to add
The time of heat heating is no more than 20 seconds.
5. artificial aging state high strength alumin ium alloy returns forming synchronous process according to claim 1, which is characterized in that described to add
Heat to heating speed before 120 DEG C is greater than 20 DEG C/sec.
6. artificial aging state high strength alumin ium alloy returns forming synchronous process according to claim 1, which is characterized in that the punching
Pressing formation speed is 0.01-10s-1。
7. artificial aging state high strength alumin ium alloy returns forming synchronous process according to claim 1, which is characterized in that the structure
After part is air-cooled to room temperature, continue artificial aging intensive treatment according to demand.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111893410A (en) * | 2020-09-10 | 2020-11-06 | 东莞市和镁五金有限公司 | Magnesium alloy aging shaping technology and equipment |
| CN112122465A (en) * | 2020-09-11 | 2020-12-25 | 天津航天长征火箭制造有限公司 | Self-resistance heating forming method for hard aluminum alloy section sinking structure |
| CN112264498A (en) * | 2020-09-30 | 2021-01-26 | 武汉理工大学 | Aluminum alloy pre-strengthening hot stamping forming method |
| CN112775310A (en) * | 2020-12-23 | 2021-05-11 | 上海交通大学 | Aluminum alloy thin-wall component and efficient hot stamping forming method and application thereof |
| CN114798797A (en) * | 2022-03-18 | 2022-07-29 | 上海泽升汽车科技有限公司 | 6111 extrusion aluminum alloy plate punch forming method |
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| CN112775310A (en) * | 2020-12-23 | 2021-05-11 | 上海交通大学 | Aluminum alloy thin-wall component and efficient hot stamping forming method and application thereof |
| CN114798797A (en) * | 2022-03-18 | 2022-07-29 | 上海泽升汽车科技有限公司 | 6111 extrusion aluminum alloy plate punch forming method |
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