CN104498847B - Thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation - Google Patents
Thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation Download PDFInfo
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- CN104498847B CN104498847B CN201410725568.XA CN201410725568A CN104498847B CN 104498847 B CN104498847 B CN 104498847B CN 201410725568 A CN201410725568 A CN 201410725568A CN 104498847 B CN104498847 B CN 104498847B
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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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- 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
Abstract
A kind of thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation, this method are as follows：1. providing that workpiece enters the mode of stove placement according to workpiece feature；2. heating and thermal insulation, 3. Putting into water rapidly quenching；4. hydraulic press is segmented school shape；5. tooling ties up shape, natrual ageing is carried out.Advantages of the present invention：It using heating and thermal insulation, is quickly cooled down, is segmented school shape and the method that is combined of tooling dimension shape, solve the problems, such as thin-walled cavity structure alloyed aluminium variable shape；Belong to wrought aluminium alloy Field of Heat-treatment, is suitable for thin-walled wrought aluminium alloy class part.
Description
Technical field
The invention belongs to wrought aluminium alloy Field of Heat-treatment, are related to a kind of thin-walled cavity structure aluminium alloy post heat treatment
Deformation control method, it is suitable for the yielding aluminium alloy class part of thin-walled cavity.
Background technology
Aluminum alloy junction component can shape complex component, feature at low cost is navigated in aviation because having excellent performance
It, ship, the fields such as rail traffic are using very extensive.With the continuous improvement of manufacturing technology index request, product
Structure type becomes increasingly complex, using traditional heat treatment process, it will generates larger deformation.Thin-walled cavity structure aluminium alloy
Holder use 2A12 wrought aluminium alloys, condition of heat treatment be quenching natrual ageing, the aluminium alloy aerospace, rail traffic,
The fields such as weaponry are using very extensive.The holder generally uses the aluminium sheet of thickness about 30mm, passes through Milling Process forming cavity knot
Structure, thinnest part about 5mm.Due to holder each section became uneven, cutting output is different, and structure is longer, generated after Milling Process is complete compared with
Big deformation, deflection about 10mm.By the method for cold sizing, rebound is larger, cannot be satisfied the requirement subsequently assembled.
By studying the method for finding heat treatment plus school shape, can the deformation of effective solution workpiece the problem of, while not reducing
The mechanical property of workpiece.
Invention content
The present invention discloses a kind of thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation, it is intended to overcome thin wall type
The shortcomings that cavity configuration aluminium alloy post Workpiece structure is complicated, mechanical processing deflection is larger, cold sizing cannot be satisfied, can be effectively
Ensure that the requirement subsequently assembled, performance indicator reach design requirement.
Technical scheme is as follows：
A kind of thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation, includes the following steps：
The first step enters stove mode：Thin-walled cavity structure aluminium alloy post workpiece enters stove using the vertical disposing way of length direction；
Second step, heating and thermal insulation：Technological parameter is to be heated to 280~290 DEG C, keeps the temperature 20min~30min；
Third walks, and is quickly cooled down：With the transfer time workpiece Putting into water rapidly less than 15s, water temperature is 20~30 DEG C；Workpiece water
5~10min of middle stop；
4th step is segmented school shape：After being quickly cooled down, first to one end proximal end school shape of workpiece length direction, after it is long to workpiece
Direction other end proximal end school shape, then to school shape in the middle part of workpiece length direction；
5th step, tooling tie up shape：Workpiece after the completion of the shape of school is packed into tooling dimension shape immediately, then natrual ageing 96~100
Hour.
Preferably, when implementing,
In second step, optimal heating temperature is 285 DEG C, and optimal soaking time is 25min；
In the third step, optimal water temperature is 25 DEG C, and the residence time is 5min in most excellent water；
In the 4th step, school shape uses hydraulic press；
In the 4th step, it is segmented in the shape of school, determines the point of application of school shape, workpiece length direction one end proximal end refers to workpiece
At length direction 1/4, the workpiece length direction other end proximal end refers at workpiece length direction 3/4, in the middle part of the workpiece length direction
Refer at workpiece length direction 1/2；
In the 5th step, the tooling is fixed workpiece with 6 card orchids in workpiece surrounding, according to flat support with the blue spiral shell of card
Bolt adjusts the size of clamping force；Optimal natrual ageing 96 hours.
Beneficial effects of the present invention：
1) holding temperature and the time for defining heat treatment, can reduce workpiece deformation and properties of product does not reduce；2) it provides
The requirement of the time and water temperature of quenching transfer are conducive to workpiece and reach superior performance and the best binding site of minimal deformation；3)
Shape method is tieed up using special tooling, controls and deforms relative to particular manufacturing craft, it is simple in structure, it is easily operated, it can reach control deformation
Purpose；4) by grasping the rule of workpiece deformation, school shape is segmented using hydraulic press, accurate school shape can be carried out to workpiece；5) when
Effect stage overall process keeps the constraint of tooling, effectively controls the deformation of complex component Stages of Aging stress relaxation generation.
Can effective solution workpiece deformation the problem of, experiment shows that deflection is can be controlled within 1.5mm, while not dropping
The mechanical property of low workpiece.
Description of the drawings
Fig. 1, thin-walled cavity structure aluminium alloy post part schematic diagram
A) it is side view that holder front view b) is holder
Fig. 2, hydraulic press school shape schematic diagram
Fig. 3 toolings tie up shape timeliness schematic diagram
It marks and indicates in figure：1-workpiece, 2-school shape cushion blocks, 3-hydraulic presses, 4-school shape platforms, 5-cards are blue
Specific implementation mode
In the following, with reference to the drawings and specific embodiments, being further described to invention.
By taking thin-walled inlets structure casts cast aluminium alloy gold bay section workpiece Deformation control as an example, as shown in Fig. 1, workpiece
Material is 2A12, and condition of heat treatment is quenching+natrual ageing, and workpiece overall length is 1400mm, width 280mm, maximum gauge 27mm,
Minimum thickness 10mm.About 8mm is deformed after mechanical processing.
Deflection is controlled within 2mm by using rapid thermal treatment school shape, and workpiece performance does not reduce.
Embodiment 1
Specific implementation mode is carried out by following processing step：
The first step determines stove mode：Workpiece uses the vertical disposing way of length direction；
Second step determines heating and thermal insulation technological parameter：Workpiece heat keeps the temperature 30min to 280 DEG C；
Third walks, Putting into water rapidly quenching：Less than 15s transfer time workpiece Putting into water rapidly, 30 DEG C of water temperature；It is stopped in workpiece water
5min；
4th step is segmented school shape：As shown in Fig. 2, workpiece 1 is placed on the shape platform of school, divides into school shape cushion block 2, school shape
Using hydraulic press 3, first to school shape at workpiece length direction 1/4, after to school shape at workpiece length direction 3/4, then to workpiece length direction 1/2
Locate school shape；
5th step, tooling tie up shape：As shown in Fig. 3, workpiece fills tooling dimension shape immediately after the completion of the shape of school, and workpiece 1 is fixed
It on school shape platform 4, shares 6 card orchids 5 and uniformly fixes workpiece, the size of clamping force is adjusted with the blue bolt of card, it is then natural
Timeliness 96 hours.
Embodiment 2
Specific implementation mode is carried out by following processing step：
The first step determines stove mode：Workpiece uses the vertical disposing way of length direction；
Second step determines heating and thermal insulation technological parameter：Workpiece heat keeps the temperature 20min to 290 DEG C；
Third walks, and enters water quenching：Less than 15s transfer time workpiece Putting into water rapidly, 30 DEG C of water temperature stops in workpiece water
10min；
4th step is segmented school shape：Using hydraulic press 1 first to school shape at workpiece length direction 1/4,2 again to workpiece length direction 3/4
Locate school shape, finally to school shape at workpiece length direction 1/2；
5th step, tooling tie up shape：School gestalt workpiece fills tooling dimension shape immediately, workpiece 4 is fixed on school shape platform 2, altogether
Workpiece is uniformly fixed with 6 card orchids 5, the size of clamping force is adjusted with the blue bolt of card, then natrual ageing 100 hours.
Embodiment 3
Specific implementation mode is carried out by following processing step：
The first step determines stove mode：Workpiece uses the vertical disposing way of length direction；
Second step determines heating and thermal insulation technological parameter：Workpiece heat keeps the temperature 25min to 285 DEG C；
Third walks, and enters water quenching：Less than 15s transfer time workpiece Putting into water rapidly, 25 DEG C of water temperature stops in workpiece water
5min；
4th step is segmented school shape：Using hydraulic press 1 first to school shape at workpiece length direction 1/4,2 again to workpiece length direction 3/4
Locate school shape, finally to school shape at workpiece length direction 1/2；
5th step, tooling tie up shape：School gestalt workpiece fills tooling dimension shape immediately, workpiece 1 is fixed on school shape platform 2, altogether
Workpiece is uniformly fixed with 6 card orchids 5, the size of clamping force is adjusted with the blue bolt of card, then natrual ageing 96 hours.
The foregoing is merely the preferable possible embodiments of the present invention, not thereby limit to the scope of the claims of the present invention, therefore all
It is to be both contained in protection scope of the present invention with equivalence changes made by description of the invention and accompanying drawing content.
Claims (6)
1. a kind of thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation, includes the following steps：
The first step enters stove mode：Thin-walled cavity structure aluminium alloy post workpiece enters stove using the vertical disposing way of length direction；
Second step, heating and thermal insulation：280~290 DEG C are heated to, 20min~30min is kept the temperature；
Third walks, and is quickly cooled down：With the transfer time workpiece Putting into water rapidly less than 15s, water temperature is 20~30 DEG C；Stop in workpiece water
Stay 5~10min；
4th step is segmented school shape：After being quickly cooled down, first to one end proximal end school shape of workpiece length direction, after to workpiece length direction
Other end proximal end school shape, then to school shape in the middle part of workpiece length direction；
5th step, tooling tie up shape：Workpiece after the completion of the shape of school is packed into tooling dimension shape immediately, then natrual ageing 96~100 hours.
2. thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation according to claim 1, which is characterized in that
In second step, heating temperature is 285 DEG C, soaking time 25min.
3. a kind of thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation according to claim 1, feature
It is, in the third step, water temperature is 25 DEG C, and the residence time is 5min in water.
4. thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation according to claim 1, school shape feature
It is, in the 4th step, school shape uses hydraulic press.
5. thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation according to claim 1, which is characterized in that
In the 4th step, workpiece length direction one end proximal end refers at workpiece length direction 1/4, and the workpiece length direction other end is close
Refer at workpiece length direction 3/4 at end, refers at workpiece length direction 1/2 in the middle part of the workpiece length direction.
6. thin-walled cavity structure aluminium alloy post method for controlling heat treatment deformation according to claim 1, which is characterized in that
In the 5th step, workpiece is fixed with 6 card orchids in workpiece surrounding, the size of clamping force is adjusted with the blue bolt of card；Natrual ageing
96 hours.
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| CN105506522B (en) * | 2015-12-24 | 2017-04-05 | 西北工业大学 | A kind of frame clsss aluminium alloy castings heat treatment deformation bearing calibration |
| CN112588878B (en) * | 2020-11-27 | 2022-09-27 | 北京星航机电装备有限公司 | Local shape correcting method for aluminum alloy thin-wall special-shaped part |
| CN114952180B (en) * | 2022-08-01 | 2022-12-06 | 陕西斯瑞新材料股份有限公司 | Shape correction method for deformation of thin-wall part after vacuum brazing and application thereof |
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| CN103834883B (en) * | 2012-11-20 | 2016-02-10 | 北京航星机器制造公司 | A kind of thin-walled shape of a saddle aluminum alloy casting method for controlling heat treatment deformation |
| CN103831579A (en) * | 2012-11-20 | 2014-06-04 | 北京航星机器制造公司 | Machining method of complex casting with non-circular cross section |
| CN103468893B (en) * | 2013-07-18 | 2018-08-07 | 中国兵器工业第五九研究所 | Quenching unit and its application method for Complex Aluminum Alloy Casting with Thin Wall Thickness |
| CN103451580A (en) * | 2013-09-12 | 2013-12-18 | 江南工业集团有限公司 | Solution treatment method of aluminum-alloy tubular workpiece |
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