CN108823473A - A kind of 2A97 extruding aluminium alloy and preparation method thereof - Google Patents
A kind of 2A97 extruding aluminium alloy and preparation method thereof Download PDFInfo
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- CN108823473A CN108823473A CN201811119223.4A CN201811119223A CN108823473A CN 108823473 A CN108823473 A CN 108823473A CN 201811119223 A CN201811119223 A CN 201811119223A CN 108823473 A CN108823473 A CN 108823473A
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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
- C22C21/00—Alloys based on aluminium
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/18—Alloys based on aluminium with copper as the next major constituent with zinc
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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 provides a kind of preparation methods of 2A97 extruding aluminium alloy, which is characterized in for preparing the extensibility that 2A97 extruding aluminium alloy uses in the process as 3.5~4.5%.Extensibility is very big to the Effect on Mechanical Properties of 2A97 extruding aluminium alloy product, and the present invention is optimized by the extensibility to 2A97 extruding aluminium alloy, reduces the discreteness of 2A97 extruding aluminium alloy mechanical property.The present invention also provides the 2A97 extruding aluminium alloys that a kind of method described in above-mentioned technical proposal is prepared.
Description
Technical field
The present invention relates to technical field of aluminum alloy technology more particularly to a kind of 2A97 extruding aluminium alloy and preparation method thereof.
Background technique
2A97 aluminium lithium alloy is Al-Cu-Li system precipitation enhanced type aluminium alloy, and alloying level is high, and intensity is high, be China from
The processing performance of the novel alloy of main research and development, alloy is good, the fields such as aerospace with good application prospect.Currently,
Research report about the alloy is seldom.
For prior art when preparing 2A97 extruding aluminium alloy, the mode of stretching is more extensive, and some products are quenching
After deform larger, some products are porous extruding, squeeze that woollen is also different in size, and subjective factor when stretching is more, product
Extensibility fluctuation is larger.Stretching mode used by the prior art is primarily present following problems：Same product head, in, the drawing of tail
It is big to stretch rate difference；Stretching stability bandwidth between root and root is larger.The mechanical property of the 2A97 extruding aluminium alloy of prior art preparation
It is not high, and stability is poor, it is difficult to meet actual demand.
Summary of the invention
In view of this, the present invention mentions the purpose of the present invention is to provide a kind of 2A97 extruding aluminium alloy and preparation method thereof
The 2A97 extruding aluminium alloy of the method preparation of confession has good mechanical property.
The present invention provides a kind of preparation methods of 2A97 extruding aluminium alloy, which is characterized in that preparation 2A97 extruded aluminium is closed
The extensibility that uses is 3.5~4.5% during gold.
The present invention provides a kind of preparation methods of 2A97 extruding aluminium alloy, preferably include：
Alloy cast ingot is successively heated, is squeezed, is quenched and tension straingtening, obtaining 2A97 extruding aluminium alloy.
In the present invention, the ingredient of the alloy cast ingot is：
The Cu of 3.7~4.0wt%；
The Li of 1.3~1.6wt%；
The Mg of 0.35~0.55wt%；
The Zr of 0.1~0.2wt%；
The Zn of 0.4~0.6wt%；
Surplus is Al.
In the present invention, the mass content of the Cu is preferably 3.8~3.9%.
In the present invention, the mass content of the Li is preferably 1.4~1.5%.
In the present invention, the mass content of the Mg is preferably 0.38~0.42%, and more preferably 0.4%.
In the present invention, the mass content of the Zr is preferably 0.12~0.18%, and more preferably 0.14~0.16%.
In the present invention, the mass content of the Zn is preferably 0.45~0.55%, and more preferably 0.5%.
The present invention does not have special limitation to the preparation method of the alloy cast ingot, and use is well known to those skilled in the art
The preparation method of aluminium alloy cast ingot carries out ingredient, melting and casting and is prepared.
In the present invention, the temperature of the heating is preferably 420~460 DEG C, and more preferably 430~450 DEG C, most preferably
435~445 DEG C.
In the present invention, the cylinder temperature in the extrusion process is preferably 420~450 DEG C, and more preferably 425~440 DEG C, most
Preferably 430~435 DEG C.
In the present invention, the mold temperature in the extrusion process is preferably 400~450 DEG C, more preferably 420~450
DEG C, most preferably 435~450 DEG C.
In the present invention, the extrusion speed in the extrusion process is preferably 0.2~1.2m/min, more preferably 0.5~
1m/min, most preferably 0.7~0.8m/min.
In the present invention, the extrusion coefficient in the extrusion process is preferably 30~35, and more preferably 31~34, most preferably
It is 32~33.
The present invention does not have special limitation to the method for the quenching, is squeezed using preparation well known to those skilled in the art
Quenching technology scheme during aluminium alloy.In the present invention, the temperature of the quenching is preferably 515~525 DEG C, more excellent
It is selected as 518~522 DEG C, most preferably 520 DEG C.The present invention does not have special limitation, ability to the soaking time in quenching process
Field technique personnel can select suitable soaking time according to the thickest or diameter of product.
Inventor has found after study on the basis of many experiments, for 2A97 extruding aluminium alloy, with extensibility
Increase, tensile strength and yield strength are gradually increased, and elongation percentage is gradually reduced, influence pole of the extensibility to yield strength
Greatly.
For 2A97 extruding aluminium alloy, in order to meet mechanical property requirements, in the present invention, during the tension straingtening
Optimum stretch rate be 3.5~4.5%, preferably 3.8~4.2%, most preferably 4%.Inventor is by a large amount of research hair
Existing, extensibility is very big to the Effect on Mechanical Properties of 2A97 extruding aluminium alloy, seriously affects the uniform of entire batch product properties
Property and stability, the extruding aluminium alloy performance number made it is very discrete, the invention proposes for 2A97 extruding aluminium alloy
Optimal extensibility, the discreteness of 2A97 extruding aluminium alloy performance, it is steady to improve performance caused by capable of reducing because of extensibility difference
It is qualitative, meet the production requirement of 2A97 extruding aluminium alloy product.
Inventor is on the basis of many experiments the study found that quenched alloy is parked before tension straingtening different
Time, with the extension of storage period, alloy strength rapid growth, yield strength can increase megapascal up to a hundred in 3 hours.At this
In invention, by quenched alloy, the storage period is shorter before tension straingtening, and easier stretching is not easy to break, storage period mistake
Long, intensity rises, and the storage period, yield strength growth was especially fast, as shown in Figure 1 in 3 hours.
Therefore, the present invention is while controlling the optimum range of extensibility, to alloy before tension straingtening after control quenching
Storage period is also extremely important to the raising of 2A97 extruding aluminium alloy mechanical property.
In the present invention, after the quenching present invention preferably quenched product is completed to stretch within the shortest time it is strong
Directly, i.e., quenched product need to stretch in time；The shortest time preferably≤2 hours, more preferably≤1.5 hours, most preferably
≤ 1 hour.
In the present invention, after the tension straingtening it is also preferable to include：
Product after tension straingtening is sampled.
The present invention does not have special limitation to the method for the sampling, and those skilled in the art adopt according to practical condition
It is sampled with suitable sampling method.
In the present invention, after the sampling it is also preferable to include：
Product after sampling is subjected to crop end.
In the present invention, cutting off during the crop end and squeezing the length of head end is preferably 300~500mm, more preferably
For 350~450mm, most preferably 380~420mm；The length that excision squeezes tail end is preferably 500~1000mm, more preferably
600~900mm, most preferably 700~800mm.
The present invention also provides the 2A97 extruding aluminium alloys that a kind of method described in above-mentioned technical proposal is prepared.At this
In invention, the preparation method of the 2A97 extruding aluminium alloy is consistent with method described in above-mentioned technical proposal, and details are not described herein.
In the present invention, the ingredient of the 2A97 extruding aluminium alloy is consistent with the ingredient of alloy cast ingot described in above-mentioned technical proposal, herein
It repeats no more.
Compared with prior art, the present invention changes when being directed to the technical issues of improving 2A97 extruding aluminium alloy mechanical property
Conventional thinking is become, has been changed in terms of the adjustment heat treatment process parameter as the prior art when aluminium alloy capability is lower
Into；And the present invention by rationally control quenched in 2A97 extruding aluminium alloy preparation process after to when parking of alloy before tension straingtening
Between and reasonably optimizing obtain optimal extensibility, make the 2A97 extruding aluminium alloy being prepared that there is good mechanical property, together
When reduce the discrete value of same batch alloy property, improve the alloy mass production stability and performance it is uniform
Property, meet production requirement.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is influence of the storage period to 2A97 extruding aluminium alloy performance in the present invention.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example 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 common
Technical staff it is improved or retouching all other example, shall fall within the protection scope of the present invention.
Embodiment 1
2A97 extruding aluminium alloy is prepared by the following method：
Alloy cast ingot is successively heated, squeezes, quench, tension straingtening, sampling and crop end, obtains 2A97 extruded aluminium
Alloy；
The ingredient of the alloy cast ingot is：
The Cu of 3.8wt%；The Li of 1.4wt%；The Mg of 0.45wt%；The Zr of 0.15wt%；The Zn of 0.5wt%；Surplus is
Al。
The temperature of the heating is 440 DEG C.
Specific process parameter in the extrusion process is：
Cylinder temperature is 435 DEG C, and mold temperature is 435 DEG C, extrusion speed 0.7m/min, extrusion coefficient 32.96.
The temperature of the quenching is 520 DEG C.
It is 1.5 hours total to the time for completing tension straingtening after quenching.
Specific process parameter during the tension straingtening is：
Extensibility is 4%；
Referring to ASTM B557M-15 test method, the 2A97 extruding aluminium alloy that the embodiment of the present invention 1 is prepared is carried out
Yield strength detection, testing result is that the yield strength for the 2A97 extruding aluminium alloy that the embodiment of the present invention 1 is prepared is
545MPa。
Referring to ASTM B557M-15 test method, the 2A97 extruding aluminium alloy that the embodiment of the present invention 1 is prepared is carried out
Tensile strength detection, testing result is that the tensile strength for the 2A97 extruding aluminium alloy that the embodiment of the present invention 1 is prepared is
580MPa。
Referring to ASTM B557M-15 test method, the 2A97 extruding aluminium alloy that the embodiment of the present invention 1 is prepared is carried out
Elongation percentage detection, testing result are that the elongation percentage for the 2A97 extruding aluminium alloy that the embodiment of the present invention 1 is prepared is 9.5%.
Embodiment 2
2A97 extruding aluminium alloy is prepared by the following method：
Alloy cast ingot is successively heated, squeezes, quench, tension straingtening, sampling and crop end, obtains 2A97 extruded aluminium
Alloy；
The ingredient of the alloy cast ingot is：
The Cu of 4.0wt%；The Li of 1.6wt%；The Mg of 0.55wt%；The Zr of 0.2wt%；The Zn of 0.6wt%；Surplus is
Al。
The temperature of the heating is 460 DEG C.
Specific process parameter in the extrusion process is：
Cylinder temperature is 450 DEG C, and mold temperature is 450 DEG C, extrusion speed 1.2m/min, extrusion coefficient 32.96.
The temperature of the quenching is 520 DEG C.
It is 2 hours total to the time for completing tension straingtening after quenching.
Specific process parameter during the tension straingtening is：
Extensibility is 4.5%；
According to the method for embodiment 1, yield strength is carried out to the 2A97 extruding aluminium alloy that the embodiment of the present invention 2 is prepared
Detection, testing result are that the yield strength for the 2A97 extruding aluminium alloy that the embodiment of the present invention 2 is prepared is 560MPa.
According to the method for embodiment 1, tensile strength is carried out to the 2A97 extruding aluminium alloy that the embodiment of the present invention 2 is prepared
Detection, testing result are that the tensile strength for the 2A97 extruding aluminium alloy that the embodiment of the present invention 2 is prepared is 605MPa.
According to the method for embodiment 1, elongation percentage inspection is carried out to the 2A97 extruding aluminium alloy that the embodiment of the present invention 2 is prepared
It surveys, testing result is that the elongation percentage for the 2A97 extruding aluminium alloy that the embodiment of the present invention 2 is prepared is 9%.
Embodiment 3
2A97 extruding aluminium alloy is prepared by the following method：
Alloy cast ingot is successively heated, squeezes, quench, tension straingtening, sampling and crop end, obtains 2A97 extruded aluminium
Alloy；
The ingredient of the alloy cast ingot is：
The Cu of 3.7wt%；The Li of 1.3wt%；The Mg of 0.35wt%；The Zr of 0.1wt%；The Zn of 0.4wt%；Surplus is
Al。
The temperature of the heating is 420 DEG C.
Specific process parameter in the extrusion process is：
Cylinder temperature is 420 DEG C, and mold temperature is 400 DEG C, extrusion speed 0.2m/min, extrusion coefficient 32.96.
The temperature of the quenching is 520 DEG C.
It is 0.5 hour total to the time for completing tension straingtening after quenching.
Specific process parameter during the tension straingtening is：
Extensibility is 3.5%；
According to the method for embodiment 1, yield strength is carried out to the 2A97 extruding aluminium alloy that the embodiment of the present invention 3 is prepared
Detection, testing result are that the yield strength for the 2A97 extruding aluminium alloy that the embodiment of the present invention 3 is prepared is 525MPa.
According to the method for embodiment 1, tensile strength is carried out to the 2A97 extruding aluminium alloy that the embodiment of the present invention 3 is prepared
Detection, testing result are that the tensile strength for the 2A97 extruding aluminium alloy that the embodiment of the present invention 3 is prepared is 550MPa.
According to the method for embodiment 1, elongation percentage inspection is carried out to the 2A97 extruding aluminium alloy that the embodiment of the present invention 3 is prepared
It surveys, testing result is that the elongation percentage for the 2A97 extruding aluminium alloy that the embodiment of the present invention 3 is prepared is 10%.
Comparative example 1
2A97 extruding aluminium alloy is prepared according to method described in embodiment 1, the difference from embodiment 1 is that, it stretches
Extensibility in straightening process is 3%.
According to the method for embodiment 1, yield strength is carried out to the 2A97 extruding aluminium alloy that comparative example 1 of the present invention is prepared
Detection, testing result are that the yield strength for the 2A97 extruding aluminium alloy that comparative example 1 of the present invention is prepared is 495MPa.
According to the method for embodiment 1, tensile strength is carried out to the 2A97 extruding aluminium alloy that comparative example 1 of the present invention is prepared
Detection, testing result are that the tensile strength for the 2A97 extruding aluminium alloy that comparative example 1 of the present invention is prepared is 535MPa.
According to the method for embodiment 1, elongation percentage inspection is carried out to the 2A97 extruding aluminium alloy that comparative example 1 of the present invention is prepared
It surveys, testing result is that the elongation percentage for the 2A97 extruding aluminium alloy that comparative example 1 of the present invention is prepared is 12%.
Comparative example 2
2A97 extruding aluminium alloy is prepared according to method described in embodiment 1, the difference from embodiment 1 is that, it stretches
Extensibility in straightening process is 5%.
According to the method for embodiment 1, yield strength is carried out to the 2A97 extruding aluminium alloy that comparative example 2 of the present invention is prepared
Detection, testing result are that the yield strength for the 2A97 extruding aluminium alloy that comparative example 2 of the present invention is prepared is 568MPa.
According to the method for embodiment 1, tensile strength is carried out to the 2A97 extruding aluminium alloy that comparative example 2 of the present invention is prepared
Detection, testing result are that the tensile strength for the 2A97 extruding aluminium alloy that comparative example 2 of the present invention is prepared is 625MPa.
According to the method for embodiment 1, elongation percentage inspection is carried out to the 2A97 extruding aluminium alloy that comparative example 2 of the present invention is prepared
It surveys, testing result is that the elongation percentage for the 2A97 extruding aluminium alloy that comparative example 2 of the present invention is prepared is 7%.
As seen from the above embodiment, the present invention provides a kind of preparation methods of 2A97 extruding aluminium alloy, including：By alloy
Ingot casting is successively heated, squeezed, quenched and tension straingtening, obtains 2A97 extruding aluminium alloy；The ingredient of the alloy cast ingot is：
The Cu of 3.7~4.0wt%；The Li of 1.3~1.6wt%；The Mg of 0.35~0.55wt%；The Zr of 0.1~0.2wt%；0.4~
The Zn of 0.6wt%；Surplus is Al；Extensibility during the tension straingtening is 3.5~4.5%.Extensibility squeezes 2A97
The Effect on Mechanical Properties of Al-alloy products is very big, and the present invention is optimized by the extensibility to 2A97 extruding aluminium alloy, reduces
The discreteness of 2A97 extruding aluminium alloy mechanical property.
What has been described above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill of the art
For personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (8)
1. a kind of preparation method of 2A97 extruding aluminium alloy, which is characterized in that prepare what 2A97 extruding aluminium alloy used in the process
Extensibility is 3.5~4.5%.
2. the method according to claim 1, wherein the preparation method of the 2A97 extruding aluminium alloy includes：
Alloy cast ingot is successively heated, is squeezed, is quenched and tension straingtening, obtaining 2A97 extruding aluminium alloy；
The ingredient of the alloy cast ingot is：
The Cu of 3.7~4.0wt%；The Li of 1.3~1.6wt%；The Mg of 0.35~0.55wt%；The Zr of 0.1~0.2wt%；0.4
The Zn of~0.6wt%；Surplus is Al.
3. the method according to claim 1, wherein the temperature of the heating is 420~460 DEG C.
4. the method according to claim 1, wherein the cylinder temperature in the extrusion process is 420~450 DEG C.
5. the method according to claim 1, wherein the mold temperature in the extrusion process is 400~450
℃。
6. the method according to claim 1, wherein the extrusion speed in the extrusion process is 0.2~1.2m/
min。
7. the method according to claim 1, wherein the extrusion coefficient in the extrusion process is 30~35.
8. a kind of 2A97 extruding aluminium alloy that method described in claim 1 is prepared.
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| CN201811119223.4A CN108823473A (en) | 2018-09-25 | 2018-09-25 | A kind of 2A97 extruding aluminium alloy and preparation method thereof |
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| CN201811119223.4A CN108823473A (en) | 2018-09-25 | 2018-09-25 | A kind of 2A97 extruding aluminium alloy and preparation method thereof |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101889099A (en) * | 2007-12-04 | 2010-11-17 | 美铝公司 | Improved Solder for Al-Cu Joint Welding-lithium alloy |
-
2018
- 2018-09-25 CN CN201811119223.4A patent/CN108823473A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101889099A (en) * | 2007-12-04 | 2010-11-17 | 美铝公司 | Improved Solder for Al-Cu Joint Welding-lithium alloy |
| CN104674090A (en) * | 2007-12-04 | 2015-06-03 | 美铝公司 | Improved aluminum-copper-lithium alloys |
Non-Patent Citations (2)
| Title |
|---|
| 周斌兴等: "《最新实用五金手册》", 28 February 2015, 河南科学技术出版社 * |
| 廖健等: "《铝合金挤压材生产与应用》", 31 March 2018, 冶金工业出版社 * |
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