CN105220091B - A kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate - Google Patents
A kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate Download PDFInfo
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- CN105220091B CN105220091B CN201510661243.4A CN201510661243A CN105220091B CN 105220091 B CN105220091 B CN 105220091B CN 201510661243 A CN201510661243 A CN 201510661243A CN 105220091 B CN105220091 B CN 105220091B
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- lithium alloy
- aluminium lithium
- artificial aging
- thin plate
- aging state
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Abstract
The present invention provides a kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate to improve the roughness of die surface, reduce the scuffing in forming process to piece surface by using detergent, clear mould glue to mold clean；Plate is preheated by using the mode that induction is quickly heated, the material property effectively improved, further, since heating time is short, precipitated phase back dissolving, recrystallization will not occur for material, and therefore, material property will not change during heating；By carrying out cooling treatment to upper mold, part heat can be taken away rapidly in forming process, therefore, material property will not change in forming process.Artificial aging state aluminium lithium alloy thin plate is formed through the invention, simple process, cost is relatively low, it is easy to accomplish large-scale industrial production.
Description
Technical field
The present invention relates to a kind of manufacturing process of golden thin plate, in particular to a kind of artificial aging state aluminium lithium alloy thin plate
Manufacturing process.
Background technique
Aluminium lithium alloy is comprehensive with its higher fracture toughness, good anti-fatigue performance and good corrosion resistance etc.
Can, it is widely used as the main structure of metal plate parts and aircraft.Due to artificial aging state aluminium lithium alloy thin plate, room temperature forming property
The only one third of annealed state plate, elongation percentage also only have 10% or so, are significantly less than 20% elongation percentage of annealing plate,
Therefore serious, part manufacturing process generation cracking is sprung back after causing part forming, so, mostly use annealed sheet to shape at present,
It is quenched after forming, school shape, artificial aging.Although being also able to achieve the manufacture of part through such process, exist
Repeat grain coarsening, intensity decline caused by being heat-treated, skid wire, surface scratching, energy consumption height, the disadvantages such as production efficiency is low
End.Therefore, it is necessary to seek, a kind of manufacturing cost is cheap, machinability is more preferable and can keep the manufacturing process of material property.
A kind of alloy synchronous-quenchinthermal-forming thermal-forming process forming technology is disclosed in CN103695817, is situated between including with water
Matter quenching, but need to quench again and subsequent artefacts' timeliness makes material to use state, this forming efficiency is lower, and energy consumption is larger,
And it is with certain limitation, 1.0mm or less plate is not suitable for the material for repeating to be heat-treated number.
CN102974675A discloses thermo shaping method after a kind of solid solution water quenching of aluminum alloy sheet metal component, which needs to mold
Heating, the material for then improving Part temperature by heat transfer, improving forming property, but handled in the prior art
Material is in 150 DEG C~400 DEG C temperature range stay longers, and the time is uncertain, it means that generates to material property larger
It influences.(" ML377 aluminium lithium alloy THERMAL STABILITY ") disclosed in the prior art shows that aluminium lithium alloy stops at 200 DEG C or more
It stays, material property will decline to a great extent, and it is larger to mold heating energy consumption, and efficiency is lower.
Summary of the invention
The purpose of the present invention is to provide a kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate, and existing aluminium is overcome to close
Efficiency in golden preparation process is lower, energy consumption is larger low with material property etc. insufficient, this technique have manufacturing cost it is cheap, can
Processability is more preferable and the advantages that can keeping material property.
To achieve the above object, the invention adopts the following technical scheme:
A kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate, the method includes following processing steps:
(1) cleaning solution is prepared；
(2) mold is cleaned to 0.6~0.8 surface roughness of Ra；
(3) 2A97-T8 aluminium lithium alloy slab is cleaned；
(4) flexible heat insulating mattress and 2A97-T8 aluminium lithium alloy slab are sequentially placed under on mold and is fixed；
(5) with Dry ice cleaning upper mold to -20 DEG C~-10 DEG C surface temperatures；
(6) use induction heating, with 100 DEG C/s~200 DEG C/s heating rate by 2A97-T8 aluminium lithium alloy heating of plate blank extremely
500 DEG C~520 DEG C, 2-5min is kept the temperature, the heat insulating mattress, stamping and pressure maintaining are removed；
(7) part of trimming amendment step (6) obtains final part shape.
A kind of first preferred embodiment of the artificial aging state aluminium lithium alloy sheet moulding method, in the step (1),
By mass, the cleaning solution includes: hydrochloric acid 40-50g, and EDTA0.2-0.3 grams, corrosion inhibiter 65-70g, water 1000-1100
Gram.
A kind of second preferred embodiment of the artificial aging state aluminium lithium alloy sheet moulding method, in the step (3),
Cleaning to the 2A97-T8 aluminium lithium alloy steel slab surface includes: to be closed with the cleaning cotton wiping aluminium lithium for being moistened with ethyl alcohol or acetone
Golden steel slab surface, until dipping in the emergy hand polish that deionized water and granularity are 20 μm with fine sand felt after the oil-free dirt of wiping cotton
Aluminium lithium alloy steel slab surface, then at least clean 5min with deionized water, with oil-free anhydrous compressed air by aluminium lithium alloy slab
Surface drying.
A kind of third preferred embodiment of artificial aging state aluminium lithium alloy sheet moulding method, the heat insulating mattress are thick
Degree is 1~3mm.
A kind of 4th preferred embodiment of the artificial aging state aluminium lithium alloy sheet moulding method, in the step (5),
Including: (1) with the step of Dry ice cleaning upper mold is added Dry ice cleaning for the rodlike dry ice of 4~8mm of length 7-10mm and diameter
In machine glacial cirque；(2) the rifle mouth of dry ice cleaner is vertically arranged in the face to be cleaned of the upper mold of 20~25mm, with 2~2.5kg/
Min goes out ice amount, the injection pressure of 9~10bar and 0.2~0.25s/cm2Cleaning speed cleaning.
A kind of 5th preferred embodiment of artificial aging state aluminium lithium alloy sheet moulding method, makes top mold surface temperature
Degree reaches -20 DEG C~-10 DEG C times for 30s-60s.
A kind of 6th preferred embodiment of the artificial aging state aluminium lithium alloy sheet moulding method, in the step (6),
Keep the temperature 3-4min.
A kind of 7th preferred embodiment of the artificial aging state aluminium lithium alloy sheet moulding method, in the step (6),
Stamping speed is 50mm/s~95mm/s.
A kind of 8th preferred embodiment of the artificial aging state aluminium lithium alloy sheet moulding method, in the step (6),
130~180s of dwell time.
Compared with the immediate prior art, the invention has the following advantages:
1, technical solution provided by the invention improves die surface by using detergent, clear mould glue to mold clean
Roughness reduces the scuffing in forming process to piece surface.
2, plate is preheated by using the mode that induction is quickly heated, the material property effectively improved.In addition,
Since heating time is short, precipitated phase back dissolving, recrystallization will not occur for material, and therefore, material property will not be sent out during heating
It is raw to change.In addition, by upper mold carry out cooling treatment, part heat can be taken away rapidly in forming process, therefore, at
Material property will not change during shape.
3, artificial aging state aluminium lithium alloy thin plate is formed through the invention, simple process, cost is relatively low, is easy to real
Existing large-scale industrial production.
Specific embodiment
Below in conjunction with embodiment, technical solution of the present invention is clearly and completely described, it is clear that described
Embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff every other embodiment obtained without making creative work belongs to what the present invention protected
Range.
Embodiment 1:
(1) prepare cleaning solution to die surface according to cleaning, removal black film the step of clean, cleaning solution at
Being divided into % by weight includes: hydrochloric acid 45g, EDTA0.2g, corrosion inhibiter 65g, water 1000g.Then using clear mould glue to mold table
Face is cleaned, and mold surface roughness Ra0.6 is made.
(2) using the cleaning cotton for being moistened with ethyl alcohol that 2A97-T8 aluminium lithium alloy slab (thickness 1.5mm) surface wipes are dry
Only, oil-free on visual cotton, the emergy hand polish aluminium lithium alloy plate that deionized water and granularity are 20 μm is dipped in fine sand felt
Piece surface position 5min to be brushed is cleaned using deionized water, with oil-free anhydrous compressed air in the surface base (thickness 1.5mm)
The surface aluminium lithium alloy slab (thickness 1.5mm) is dried up.
(3) flexible heat insulating mattress is placed in above lower mold, heat insulating mattress is with a thickness of 2mm, by 2A97-T8 aluminium lithium alloy slab
(thickness 1.5mm) is placed in above flexible heat insulating mattress and fixed.
(4) choose length be 7-10mm, the pole shape dry ice that diameter is 4~8mm, dry ice is added to dry ice cleaner
In glacial cirque, by the rifle mouth of dry ice cleaner perpendicular to the face to be cleaned of upper mold, rifle mouth is apart from face 20mm to be cleaned, to be cleaned
Face injection dry ice is cleaned, and ice amount is 2.5kg/min out, and injection pressure is 10bar, cleaning speed 0.25s/cm2, 1min
Top mold surface temperature reaches -18 DEG C afterwards.
(5) use and (be spaced 20s with step 4) mode of induction heating with the heating speed of 150 DEG C/s by 2A97-T8 immediately
After aluminium lithium alloy slab (thickness 1.5mm) is warming up to 500 DEG C, 4min is kept the temperature, used time 3s quickly removes heat insulating mattress, then rushed
Pressing formation speed is 60mm/s, pressure maintaining 130s.
(6) part trimming is corrected, obtains final part shape, part springback capacity < 0.5%.
(7) 4 points 20 seconds (without mold clean, school shape, trimming amendment) the time required to entire preparation flow is minimum,
Wherein induction heating 4 seconds, forming process 4 are divided 16 seconds.Compared with comparative example 1, efficiency is significantly increased.
Embodiment 2:
(1) prepare cleaning solution to die surface according to cleaning, removal black film the step of clean, cleaning solution at
Being divided into % by weight includes: hydrochloric acid 45g, EDTA0.2g, corrosion inhibiter 65g, water 1000g.Then using clear mould glue to mold table
Face is cleaned, and mold surface roughness Ra0.6 is made.
(2) using the cleaning cotton for being moistened with ethyl alcohol that 2A97-T8 aluminium lithium alloy slab (thickness 1.5mm) surface wipes are dry
Only, oil-free on visual cotton, the emergy hand polish 2A97-T8 aluminium lithium that deionized water and granularity are 20 μm is dipped in fine sand felt
Piece surface position 10min to be brushed is cleaned using deionized water, with oil-free anhydrous in the surface alloy slab (thickness 1.5mm)
Compressed air dries up the surface aluminium lithium alloy slab (thickness 1.5mm).
(3) flexible heat insulating mattress is placed in above lower die, heat insulating mattress is with a thickness of 1mm, by 2A97-T8 aluminium lithium alloy slab
(thickness 1.5mm) is placed in above flexible heat insulating mattress and fixed.
(4) choose length be 7-10mm, the pole shape dry ice that diameter is 4~8mm, dry ice is added to dry ice cleaner
In glacial cirque, by the rifle mouth of dry ice cleaner perpendicular to the face to be cleaned of upper mold, rifle mouth is apart from face 22mm to be cleaned, to be cleaned
Face injection dry ice is cleaned, and ice amount is 2.3kg/min out, and injection pressure is 9bar, and cleaning speed is 0.22 second/cm2, 2min
Top mold surface temperature reaches -12 DEG C afterwards.
(5) use and (be spaced 10s with step 4) mode of induction heating with the heating speed of 180 DEG C/s by 2A97-T8 immediately
After aluminium lithium alloy slab (thickness 1.5mm) is warming up to 520 DEG C, 3min is kept the temperature, used time 2s quickly removes heat insulating mattress, then rushed
Pressing formation speed is 70mm/s, pressure maintaining 160s.
(6) part trimming is corrected, obtains final part shape, part springback capacity < 0.5%.
(7) 3 points 47 seconds (without mold clean, school shape, trimming amendment) the time required to entire preparation flow is minimum,
Wherein induction heating 3 seconds, forming process 3 are divided 44 seconds.Compared with comparative example 1, efficiency is significantly increased.
Comparative example:
(1) it selects with a thickness of 1.5mm 2A97-T8 aluminium lithium alloy annealed state thin plate, is carried out using the mold in embodiment 1
Part manufacturing, stamping speed are 60mm/s, pressure maintaining 130s.
(2) part after forming is subjected to solution hardening processing, solid solubility temperature is 510 DEG C, 35min is kept the temperature, then in water
It is quenched in medium, water temperature is 4 DEG C.
(3) part after quenching is placed in mold and is corrected shape.
(4) part trimming is corrected, obtains final part shape, part springback capacity < 0.5%.
(5) part carries out second level artificial aging after high-ranking officers' shape, and level-one artificial aging system is 121 DEG C/3h, when second level is artificial
Effect system is 163 DEG C/8h.
(6) it (is repaired without mold clean, school shape, trimming within 10 seconds 37 minutes 11 hours the time required to entire preparation flow is minimum
Just and etc.), wherein stamping 130s, is quenched 35min, artificial aging 11h.
According to experimental standard HB 5143-1996, cut on to the slab and part in above-described embodiment and comparative example respectively
It materialses, carries out tensile property test, test result is as shown in table 1.
The test of 1 tensile property of table
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, the ordinary skill people of fields
Member should be appreciated that can be with modifications or equivalent substitutions are made to specific embodiments of the invention referring to above-described embodiment, these
Without departing from any modification of spirit and scope of the invention or equivalent replacement apply pending claims it
It is interior.
Claims (7)
1. a kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate, which is characterized in that the method includes following technique steps
It is rapid:
(1) cleaning solution is prepared；
(2) mold is cleaned to 0.6~0.8 surface roughness of Ra；
(3) 2A97-T8 aluminium lithium alloy slab is cleaned；
(4) flexible heat insulating mattress and 2A97-T8 aluminium lithium alloy slab are sequentially placed under on mold and is fixed；
(5) with Dry ice cleaning upper mold to -20 DEG C~-10 DEG C surface temperatures；
(6) induction heating is used, with 100 DEG C/s~200 DEG C/s heating rate by 2A97-T8 aluminium lithium alloy heating of plate blank to 500 DEG C
~520 DEG C, 2-5min is kept the temperature, the heat insulating mattress, stamping and pressure maintaining are removed；
(7) slab of trimming amendment step (6) obtains final part shape；
In the step (1), by mass, the cleaning solution includes: hydrochloric acid 40-50g, and EDTA0.2-0.3 grams, corrosion inhibiter
65-70g, 1000-1100 grams of water；
In the step (3), the cleaning to the aluminium lithium alloy steel slab surface includes: with the cleaning cotton for being moistened with ethyl alcohol or acetone
Aluminium lithium alloy steel slab surface is wiped, until dipping in the corundum that deionized water and granularity are 20 μm with fine sand felt after the oil-free dirt of wiping cotton
Sand hand polish aluminium lithium alloy steel slab surface, then at least clean 5min with deionized water, with oil-free anhydrous compressed air by aluminium
The drying of lithium alloy steel slab surface.
2. a kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate according to claim 1, the heat insulating mattress is thick
Degree is 1~3mm.
3. a kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate according to claim 1, which is characterized in that described
It include: that (1) adds the rodlike dry ice of 4~8mm of length 7-10mm and diameter with the step of Dry ice cleaning upper mold in step (5)
Enter in dry ice cleaner glacial cirque；(2) the rifle mouth of dry ice cleaner is vertically arranged in the face to be cleaned of the upper mold of 20~25mm, with
2~2.5kg/min goes out ice amount, injection pressure and 0.2~0.25s/cm cleaning speed cleaning of 9~10bar.
4. a kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate according to claim 1, which is characterized in that make
Mold surface temperature reaches -20 DEG C~-10 DEG C times for 30s-60s.
5. a kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate according to claim 1, which is characterized in that described
In step (6), 3-4min is kept the temperature.
6. a kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate according to claim 1, which is characterized in that described
In step (6), stamping speed is 50mm/s~95mm/s.
7. a kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate according to claim 1, which is characterized in that described
In step (6), 130~180s of dwell time.
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| CN201510661243.4A CN105220091B (en) | 2015-10-12 | 2015-10-12 | A kind of manufacturing process of artificial aging state aluminium lithium alloy thin plate |
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| CN109487184B (en) * | 2018-12-28 | 2021-03-16 | 中南大学 | Regression forming synchronous process for high-strength aluminum alloy in artificial aging state |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447467A (en) * | 2013-08-21 | 2013-12-18 | 无锡蠡湖叶轮制造有限公司 | Method for cleaning metal mould |
| CN103469221A (en) * | 2013-09-05 | 2013-12-25 | 天津东义镁制品股份有限公司 | Cleaning liquor and treatment method for removing residual magnesium alloys in die |
| CN103695817A (en) * | 2013-12-12 | 2014-04-02 | 南京航空航天大学 | Heat-treatable aluminum alloy synchronous-quenching thermal-forming process |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447467A (en) * | 2013-08-21 | 2013-12-18 | 无锡蠡湖叶轮制造有限公司 | Method for cleaning metal mould |
| CN103469221A (en) * | 2013-09-05 | 2013-12-25 | 天津东义镁制品股份有限公司 | Cleaning liquor and treatment method for removing residual magnesium alloys in die |
| CN103695817A (en) * | 2013-12-12 | 2014-04-02 | 南京航空航天大学 | Heat-treatable aluminum alloy synchronous-quenching thermal-forming process |
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Address after: 100095 Haidian District hot springs town, Beijing Village Patentee after: AECC BEIJING INSTITUTE OF AERONAUTICAL MATERIALS Address before: 100095 Haidian District hot springs town, Beijing Village Patentee before: AVIC BEIJING INSTITUTE OF AERONAUTICAL MATERIALS |
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