CN107779680A - A kind of 6 line aluminium alloy section bars and preparation method thereof - Google Patents
A kind of 6 line aluminium alloy section bars and preparation method thereof Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- C22C21/00—Alloys based on aluminium
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
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- 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
- C22F1/04—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
- C22F1/043—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 silicon as the next major constituent
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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
- C22F1/047—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 magnesium as the next major constituent
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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
- C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
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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
- C22F1/053—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 zinc as the next major constituent
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Abstract
The invention belongs to field of extrusion of aluminium alloy profile, is related to a kind of 6 line aluminium alloy section bars, includes the component of following weight/mass percentage composition：Si：0.6%~1.2%, Mg：0.5%~0.7%, Mn：0.1%~0.4%, Cr：0.1%~0.3%, Zr：0.1%~0.35%, V：0.1%~0.24%, Fe：0.1%~1%, Ti：0.05%~0.3%, Zn：0.03%~2.5%, Cu≤0.05%, surplus is Al, its preparation method is by by traditional common aging process, the method for being changed to take four sections of low-temperature short-time preageings, to suppress the Shelf―time effect of aluminium alloy extrusions, and then the aluminium alloy extrusions for making to prepare can still ensure the mechanical property of section bar by prolonged placement, and the final performance of its aluminium alloy extrusions there has also been very big raising.
Description
Technical field
The invention belongs to aluminium alloy extrusions production field, is related to a kind of 6 line aluminium alloy section bars and preparation method thereof.
Background technology
Aluminium alloy has that small density, good conductivity, thermal conductivity be high, erosion-resisting advantage, therefore does structural wood with aluminium alloy
Material can mitigate product weight and increase structural stability significantly, be used widely in production.Arranged especially as permanent magnetism
6 line aluminium alloys of vehicle material, it can not only mitigate car body weight in the case where meeting Structural strength calls, while can be notable
Reduce the energy consumption of automobile.As can be seen here, aluminium alloy will replace ferrous materials, turn into the main material of following train body.Rail
For road vehicle hanging arm type material as one of main load bearing section bar of rail vehicle, stress is big, it is desirable to which the section bar has high intensity and height
The features such as rigidity and processing and good processability.
The problem of aluminium section bar of the prior art is present：Aluminium alloy has Shelf―time effect, traditional Al- in preparation process
Mg-Si base alloy materials have serious Shelf―time effect problem, due to the presence of Shelf―time effect so that Al-Mg-Si alloy material
Even if meeting that each mechanical property meets the requirements after manufacture, but after parking a period of time each mechanical property all can
Decline, cause mechanical property to be unsatisfactory for the requirement of production, if panel material, then punching formation property and crimping processability all can
Deterioration, have a strong impact on the combination property of later stage finished product.
The content of the invention
In view of this, the present invention can influence later stage product synthesis to solve Shelf―time effect of the aluminium alloy in preparation process
A kind of the problem of performance, there is provided 6 line aluminium alloy section bars and preparation method thereof.
To reach above-mentioned purpose, the present invention provides a kind of 6 line aluminium alloy section bars, includes the group of following weight/mass percentage composition
Point：Si：0.6%~1.2%, Mg：0.5%~0.7%, Mn：0.1%~0.4%, Cr：0.1%~0.3%, Zr：0.1%~
0.35%th, V：0.1%~0.24%, Fe：0.1%~1%, Ti：0.05%~0.3%, Zn：0.03%~2.5%, Cu≤
0.05%, surplus Al.
Further, the component of following weight/mass percentage composition is included：Si：0.8%th, Mg：0.6%th, Mn：0.25%th, Cr：
0.25%th, Zr：0.25%th, V：0.2%th, Fe：0.6%th, Ti：0.15%th, Zn：1.8%th, Cu：0.05%, surplus Al.
A kind of preparation method of 6 line aluminium alloy section bar, comprises the following steps：
A, calculate each aluminium alloy stock dosage and prepare aluminium alloy stock by proportioning, the aluminium alloy stock prepared is added
Melting is liquid aluminium alloy after uniformly being mixed into smelting furnace, is aluminium alloy cast ingot by liquid aluminium alloy founding；
B, aluminium alloy cast ingot made from step A being subjected to Homogenization Treatments, the temperature of Homogenization Treatments is 500~550 DEG C,
Soaking time is 1~20h；
C, the aluminium alloy cast ingot after step B Homogenization Treatments is placed in extruder and extruded, obtain required aluminium
Alloy profile, the aluminium alloy extrusions after extruding is cooled to room temperature；
D, the aluminium alloy extrusions after step C is extruded is heated to 500~580 DEG C, and constant temperature keeps 3~4min, is dissolved
The rate of heat addition of aluminium alloy extrusions after processing, wherein aluminium alloy extrusions is 200~300 DEG C/min；
E, the aluminium alloy extrusions after step D solution treatment is cooled to less than 55 DEG C, wherein aluminium alloy in a manner of extremely cold
The cooling velocity of section bar is 500~550 DEG C/min so that magnesium silicon atom fully dissolves；
F, the aluminium alloy extrusions after step E is cooled down carries out four sections of low-temperature short-time preageings, when wherein the first stage prepares
Imitate to be incubated 1~3min at a temperature of 30~60 DEG C；Second stage preliminary aging be at a temperature of 60~80 DEG C insulation 1~
3min；Phase III preliminary aging is that 1~3min is incubated at a temperature of 30~60 DEG C；Fourth stage preliminary aging be 80~
3~6h is incubated at a temperature of 120 DEG C；
G, tension straingtening is carried out after the aluminium alloy extrusions after four sections of low-temperature short-time preageings in step F being cooled into room temperature,
Aluminium alloy extrusions after tension straingtening is parked into 24h；
H, the aluminium alloy extrusions after step G tension straingtenings is subjected to artificial aging heat treatment.
Further, in step A aluminium alloy smelting process be melt, stir, skimming, degasification removal of impurities, filtering, cast partly connect
Continuous casting method.
Further, the extrusion speed of extruder is 4.5~5.0m/min in step C, and the heating-up temperature of aluminium alloy cast ingot is
440~490 DEG C.
Further, the aluminium alloy cast ingot of Homogenization Treatments is placed in when being extruded in recipient using heat stepwise in step C
Method, the heating-up temperature on aluminium alloy cast ingot head is 475~485 DEG C, and the heating-up temperature at middle part is 450~460 DEG C, and afterbody adds
Hot temperature is 440~450 DEG C.
Further, the temperature that artificial aging is heat-treated in step H is 150~170 DEG C, and aging time is 5~8h.
Further, amount of tension is controlled within 1% in step G.
The beneficial effects of the present invention are：
1st, the 6 line aluminium alloy section bars prepared by the 6 line aluminium alloy section bar preparation methods of the present invention, to the aluminium of prior art
The chemical composition of alloy profile is optimized, and the highest content that the highest content of Mn elements is promoted to 0.4%, Cr elements carries
0.3% is risen to, the characteristic of aluminium alloy extrusions recrystallization temperature can be improved by Mn, to suppress growing up for crystal grain, so as to refine
The crystal grain of aluminium alloy extrusions, lifts Fine Texture of Material, and the aluminium alloy extrusions after optimization has more excellent mechanical property.
2nd, the 6 line aluminium alloy section bars prepared by the 6 line aluminium alloy section bar preparation methods of the present invention, solution treatment process
In, aluminium alloy extrusions is heated to 500~580 DEG C by aluminium alloy extrusions with 200~300 DEG C/min firing rate so that aluminium closes
It is superfluous in golden raw material to be mutually fully dissolved into solid solution, oversaturated solid solution is obtained, by the aluminium alloy extrusions after solid solution with 500
~550 DEG C/min cooling velocity pole is cooled to less than 55 DEG C, it is therefore prevented that crystal grain is grown up again, ensures magnesium silicon atom in aluminium alloy
Even dispersion state in matrix.The aluminium alloy extrusions being dissolved after cooling down is subjected to four sections of low-temperature short-time preageings, can be suppressed
The Shelf―time effect of aluminium alloy extrusions.Drawing process after four sections of low-temperature short-time preageings, enable to each member in aluminium alloy extrusions
The further disperse of element so that the aluminium alloy extrusions of preparation has the microstructure of trickleer stabilization.
3rd, the 6 line aluminium alloy section bars prepared by the 6 line aluminium alloy section bar preparation methods of the present invention, by will be traditional general
The method of logical timeliness, the method for being changed to take four sections of low-temperature short-time preageings, to suppress the Shelf―time effect of aluminium alloy extrusions, and then
The aluminium alloy extrusions for making to prepare can still ensure the mechanical property of section bar by prolonged placement, and its mechanical property is still
The requirement of client can be met, and the final performance of its aluminium alloy extrusions there has also been very big raising.
Embodiment
The preferred embodiments of the present invention will be described in detail below.
Embodiment 1：
A kind of preparation method of 6 line aluminium alloy section bar, comprises the following steps：
A, calculate each aluminium alloy stock dosage and prepare aluminium alloy stock, 6 line aluminium alloy raw material each element quality by proportioning
Percentage proportioning is as follows：
| Element | Si | Mg | Mn | Cr | Zr | V | Fe | Ti | Zn | Cu | Al |
| Content | 0.60 | 0.50 | 0.10 | 0.10 | 0.10 | 0.10 | 0.10 | 0.05 | 0.03 | 0.05 | Surplus |
Melting is liquid aluminium alloy after the aluminium alloy stock prepared is added in smelting furnace into uniformly mixing, by liquid aluminium
Alloy casting is aluminium alloy cast ingot, wherein aluminium alloy smelting process be melt, stir, skimming, degasification removal of impurities, filtering, cast
Semi-continuous casting method；
B, aluminium alloy cast ingot made from step A is subjected to Homogenization Treatments, the temperature of Homogenization Treatments is 500 DEG C, insulation
Time is 5h；
C, the aluminium alloy cast ingot after step B Homogenization Treatments is placed in extruder and extruded, aluminium alloy cast ingot is squeezing
Using the method for heat stepwise when being extruded in pressure cylinder, the heating-up temperature on aluminium alloy cast ingot head is 475 DEG C, the heating-up temperature at middle part
For
450 DEG C, the heating-up temperature of afterbody is 440 DEG C, and the extrusion speed of extruder is 4.5m/min, obtains required aluminium
Alloy profile, the aluminium alloy extrusions after extruding is cooled to room temperature；
D, the aluminium alloy extrusions after step C is extruded is heated to 500 DEG C, and constant temperature keeps 3min, after obtaining solution treatment
The rate of heat addition of aluminium alloy extrusions, wherein aluminium alloy extrusions is 200 DEG C/min；
E, the aluminium alloy extrusions after step D solution treatment is cooled to less than 55 DEG C, wherein aluminium alloy in a manner of extremely cold
The cooling velocity of section bar is 500 DEG C/min so that magnesium silicon atom fully dissolves；
F, the aluminium alloy extrusions after step E is cooled down carries out four sections of low-temperature short-time preageings, when wherein the first stage prepares
Imitate pre- to be incubated the 3min phase IIIs at a temperature of 60 DEG C to be incubated 3min second stage preliminary aging at a temperature of 30 DEG C
Standby timeliness is to be incubated 3min at a temperature of 30 DEG C；Fourth stage preliminary aging is to be incubated 6h at a temperature of 80 DEG C；
G, tetra- sections of pretreated aluminium alloy extrusions of low-temperature short-time of step F are cooled to after room temperature and carry out tension straingtening, drawn
The amount of stretching is controlled within 1%, and the aluminium alloy extrusions after tension straingtening is parked into 24h；
H, the aluminium alloy extrusions after stretching being subjected to artificial aging heat treatment, the temperature of artificial aging heat treatment is 150 DEG C,
Aging time is 8h.
Embodiment 2
The difference of embodiment 2 and embodiment 1 in step A 6 line aluminium alloy raw material each element mass percents with such as
Under：
| Element | Si | Mg | Mn | Cr | Zr | V | Fe | Ti | Zn | Cu | Al |
| Content | 0.80 | 0.60 | 0.25 | 0.25 | 0.25 | 0.20 | 0.60 | 0.15 | 1.8 | 0.05 | Surplus |
Embodiment 3
The difference of embodiment 3 and embodiment 1 in step A 6 line aluminium alloy raw material each element mass percents with such as
Under：
| Element | Si | Mg | Mn | Cr | Zr | V | Fe | Ti | Zn | Cu | Al |
| Content | 1.20 | 0.70 | 0.40 | 0.30 | 0.35 | 0.24 | 1.0 | 0.30 | 2.5 | 0.05 | Surplus |
Embodiment 4
The difference of embodiment 4 and embodiment 2 is 550 DEG C in the temperature of the aluminium alloy cast ingot Homogenization Treatments in step B, is protected
The warm time is 20h.
Embodiment 5
Heating-up temperature of the difference of embodiment 5 and embodiment 2 on the aluminium alloy cast ingot head in step C is 485 DEG C, middle part
Heating-up temperature be 460 DEG C, the heating-up temperature of afterbody is 450 DEG C, and the extrusion speed of extruder is 5.0m/min.
Embodiment 6
Aluminium alloy extrusions of the difference of embodiment 6 and embodiment 2 after being extruded in step D is heated to 580 DEG C, and constant temperature is protected
4min is held, obtains the aluminium alloy extrusions after solution treatment, the wherein rate of heat addition of aluminium alloy extrusions is 300 DEG C/min.
Embodiment 7
The difference of embodiment 7 and embodiment 2 is 550 DEG C/min in the cooling velocity of the aluminium alloy extrusions in step E.
Embodiment 8
The difference of embodiment 8 and embodiment 2 in step F aluminium alloy extrusions carry out four sections of low-temperature short-time preageings, its
Middle first stage preliminary aging is to be incubated 1min at a temperature of 60 DEG C；Second stage preliminary aging is to be protected at a temperature of 80 DEG C
Warm 1min；Phase III preliminary aging is to be incubated 1min at a temperature of 60 DEG C；Fourth stage preliminary aging is the temperature at 120 DEG C
The lower insulation 3h of degree.
Embodiment 9
The difference of embodiment 9 and embodiment 2 in step H artificial aging heat treatment temperature be 170 DEG C, aging time is
5h。
Comparative example 1
The difference of comparative example 1 and embodiment 1 is to omit step F, and the aluminium alloy extrusions after step E solid solution coolings is direct
Carry out step G tension straingtening.
Comparative example 2
The difference of comparative example 2 and embodiment 2 is to omit step F, and the aluminium alloy extrusions after step E solid solution coolings is direct
Carry out step G tension straingtening.
Comparative example 3
The difference of comparative example 3 and embodiment 3 is to omit step F, and the aluminium alloy extrusions after step E solid solution coolings is direct
Carry out step G tension straingtening.
Comparative example 4
The difference of comparative example 4 and embodiment 4 is to omit step F, and the aluminium alloy extrusions after step E solid solution coolings is direct
Carry out step G tension straingtening.
Comparative example 5
The difference of comparative example 5 and embodiment 5 is to omit step F, and the aluminium alloy extrusions after step E solid solution coolings is direct
Carry out step G tension straingtening.
Comparative example 6
The difference of comparative example 6 and embodiment 6 is to omit step F, and the aluminium alloy extrusions after step E solid solution coolings is direct
Carry out step G tension straingtening.
Comparative example 7
The difference of comparative example 7 and embodiment 7 is to omit step F, and the aluminium alloy extrusions after step E solid solution coolings is direct
Carry out step G tension straingtening.
Comparative example 8
The difference of comparative example 8 and embodiment 8 is to omit step F, and the aluminium alloy extrusions after step E solid solution coolings is direct
Carry out step G tension straingtening.
Comparative example 9
The difference of comparative example 9 and embodiment 9 is to omit step F, and the aluminium alloy extrusions after step E solid solution coolings is direct
Carry out step G tension straingtening.
The 6 line aluminium alloy section bars that comparative example 1~9 obtains with embodiment 1~9 carry out Mechanics Performance Testing, respectively to extruding
Afterwards, park after 24h and the mechanical property of aluminium alloy extrusions is tested after artificial aging, test result is shown in Table one：
Table one：
As can be seen from the above table, after the section bar that comparative example is squeezed out using conventional method is by depositing 24h, its yield strength
10~20MPa is substantially reduced with tensile strength, and 6 prepared by the 6 line aluminium alloy section bar preparation methods of the present invention are aluminium
Alloy profile adds a step preageing process, and after depositing 24h, yield strength and tensile strength change less substantially, and
And be also greatly improved raising by the yield strength after timeliness and tensile strength, fully meet the production requirement of client.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment the present invention is described in detail, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (8)
1. a kind of 6 line aluminium alloy section bars, it is characterised in that include the component of following weight/mass percentage composition：Si：0.6%~
1.2%th, Mg：0.5%~0.7%, Mn：0.1%~0.4%, Cr：0.1%~0.3%, Zr：0.1%~0.35%, V：
0.1%~0.24%, Fe：0.1%~1%, Ti：0.05%~0.3%, Zn：0.03%~2.5%, Cu≤0.05%, surplus
For Al.
2. 6 line aluminium alloy section bar as claimed in claim 1, it is characterised in that include the component of following weight/mass percentage composition：
Si：0.8%th, Mg：0.6%th, Mn：0.25%th, Cr：0.25%th, Zr：0.25%th, V：0.2%th, Fe：0.6%th, Ti：0.15%th,
Zn：1.8%th, Cu：0.05%, surplus Al.
3. the preparation method of the 6 line aluminium alloy section bars as described in right wants 1 or 2, it is characterised in that comprise the following steps：
A, calculate each aluminium alloy stock dosage and prepare aluminium alloy stock by proportioning, the aluminium alloy stock prepared is added to molten
Melting is liquid aluminium alloy after uniformly being mixed in furnace, is aluminium alloy cast ingot by liquid aluminium alloy founding；
B, aluminium alloy cast ingot made from step A is subjected to Homogenization Treatments, the temperature of Homogenization Treatments is 500~550 DEG C, insulation
Time is 1~20h；
C, the aluminium alloy cast ingot after step B Homogenization Treatments is placed in extruder and extruded, obtain required aluminium alloy
Section bar, the aluminium alloy extrusions after extruding is cooled to room temperature；
D, the aluminium alloy extrusions after step C is extruded is heated to 500~580 DEG C, and constant temperature keeps 3~4min, obtains solution treatment
The rate of heat addition of aluminium alloy extrusions afterwards, wherein aluminium alloy extrusions is 200~300 DEG C/min；
E, the aluminium alloy extrusions after step D solution treatment is cooled to less than 55 DEG C, wherein aluminium alloy extrusions in a manner of extremely cold
Cooling velocity be 500~550 DEG C/min so that magnesium silicon atom fully dissolves；
F, the aluminium alloy extrusions after step E is cooled down carries out four sections of low-temperature short-time preageings, and wherein first stage preliminary aging is
1~3min is incubated at a temperature of 30~60 DEG C；Second stage preliminary aging be at a temperature of 60~80 DEG C insulation 1~
3min；Phase III preliminary aging be incubated at a temperature of 30~60 DEG C 1~3min fourth stages preliminary agings be 80~
3~6h is incubated at a temperature of 120 DEG C；
G, tension straingtening is carried out after the aluminium alloy extrusions after four sections of low-temperature short-time preageings in step F being cooled into room temperature, will be drawn
Stretch the aluminium alloy extrusions after aligning and park 24h；
H, the aluminium alloy extrusions after step G tension straingtenings is subjected to artificial aging heat treatment.
4. the preparation method of 6 line aluminium alloy section bar as claimed in claim 3, it is characterised in that aluminium alloy smelting mistake in step A
Journey is melts, stirred, skimming, degasification cleans, filters, the semi-continuous casting method of casting.
5. the preparation method of 6 line aluminium alloy section bar as claimed in claim 4, it is characterised in that the extruding of extruder in step C
Speed is 4.5~5.0m/min, and the heating-up temperature of aluminium alloy cast ingot is 440~490 DEG C.
6. the preparation method of 6 line aluminium alloy section bar as claimed in claim 5, it is characterised in that Homogenization Treatments in step C
Aluminium alloy cast ingot is placed in using the method for heat stepwise when being extruded in recipient, and the heating-up temperature on aluminium alloy cast ingot head is 475
~485 DEG C, the heating-up temperature at middle part is 450~460 DEG C, and the heating-up temperature of afterbody is 440~450 DEG C.
7. the preparation method of 6 line aluminium alloy section bar as claimed in claim 6, it is characterised in that in step H at artificial aging heat
The temperature of reason is 150~170 DEG C, and aging time is 5~8h.
8. the preparation method of 6 line aluminium alloy section bar as claimed in claim 7, it is characterised in that amount of tension control exists in step G
Within 1%.
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| CN109022965A (en) * | 2018-08-31 | 2018-12-18 | 营口忠旺铝业有限公司 | A kind of super thick high-strength aluminium alloy plate and preparation method thereof |
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| CN110951998A (en) * | 2019-11-28 | 2020-04-03 | 辽宁忠旺集团有限公司 | Production process of high-temperature stable 6-series aluminum alloy section |
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| CN115652230A (en) * | 2022-11-10 | 2023-01-31 | 魏桥轻量化(苏州)科技有限公司 | Method for eliminating parking effect of 6-series aluminum alloy and aluminum alloy product |
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