CN109457155A - A kind of thermostabilization 6xxx line aluminium alloy and its heat treatment process - Google Patents
A kind of thermostabilization 6xxx line aluminium alloy and its heat treatment process Download PDFInfo
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- CN109457155A CN109457155A CN201811627651.8A CN201811627651A CN109457155A CN 109457155 A CN109457155 A CN 109457155A CN 201811627651 A CN201811627651 A CN 201811627651A CN 109457155 A CN109457155 A CN 109457155A
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- aluminium alloy
- heat treatment
- alloy
- thermostabilization
- line aluminium
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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
- C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
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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
- C22C21/06—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
-
- 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
-
- 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
-
- 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
Abstract
A kind of thermostabilization 6xxx line aluminium alloy, by percentage to the quality, consisting of: Si:0.2~0.6；Mg:0.6~1.5；Cu:0.8~1.5；Mn:0.10~0.2；Remaining is Al and trace impurity.The mass ratio of Mg and Si is between 2~3, and the mass ratio of Mg and Si is not equal to 2；The total content of Mg, Si and Cu not less than 2.4%, Si and Cu relative to Mg mass ratio [(Si+0.5 × Cu)/Mg] less than 1.The present invention also provides its heat treatment process: after solution hardening processing, being heat-treated in 60 minutes, heat treatment temperature is 160 DEG C~200 DEG C, heat treatment time 5~30 hours.The present invention has preferable creep resistance by the content and ratio of control different-alloy element to make alloy at high temperature, therefore thermal stability keeps good, the thermal stability under alloy service state can be improved, simultaneously by being heat-treated to it, enhance mechanical property, there is such aluminum alloy plate materials performance under higher intensity and high temperature exposure to stablize, and enhance the competitiveness of lightweight aluminum alloy plate materials, promote extensive use of the aluminium alloy on automobile and aircraft.
Description
Technical field
The invention belongs to nonferrous materials technical field, in particular at a kind of thermostabilization 6xxx line aluminium alloy and its heat
Science and engineering skill.
Background technique
Aluminium and aluminium alloy have been widely applied in Modern Traffic field as lightweighting materials, with traditional steel phase
, light-weight, excellent corrosion resistance higher than, aluminium alloy specific strength, therefore aluminium alloy is used widely in automobile and aviation field.
6xxx system alloy price is low, is a kind of most widely used aluminium alloy, and typical heat treatment method is T6 processing: cast and equal
It is deformed after homogenizing processing, then carries out solution treatment and quenching, finally carry out ageing strengthening processing at a certain temperature.When
The nanoscale hardened granules that even dispersion has been precipitated in aluminium alloy after effect processing hinder dislocation motion to enable aluminum alloy to strengthen.6xxx
System is a kind of typical precipitation-hardening aluminium alloy, and the 6xxx line aluminium alloy speed of separating out rapid hardening effect of silicone content surplus is significant,
Mutually and Q series is equal, these mutually become when being on active service with external environment by the area GP that main precipitated phase includes monocline and β "
Change to influence service life and safety.The aluminium alloy plate of heterogeneity and the manufacture of different heat treatment technique, the superiority and inferiority of military service performance are poor
It is very not big.
The development of civil and military communications and transportation is proposed requirements at the higher level to aluminum alloy plate materials, especially in safety of being on active service
In terms of stability.Although 6xxx line aluminium alloy used at present has faster Precipitation Kinetics, these alloys have very much
Use limitation.It is severe for high-speed rail, this use environment of fighter plane, need to be exposed to the equipment of higher temperature, aluminium alloy exists
In use process, internal precipitated phase is easy to be roughened and strength reduction, so that making the stability of entire design of part reduces, simultaneously
Grain boundaries are also easy to form coarse precipitated phase and pollution freemetallurgy, and corrosion resistance and fatigue life decline, these factors will cause
Transit equipment military service safety and life factor reduce.In summary it analyzes, it is a kind of more stable new under high temperature environment at exploitation
Type aluminium alloy is extremely important.
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 thermostabilization 6xxx line aluminium alloys
And its heat treatment process, have by the content and ratio that control different-alloy element making alloy at high temperature preferably resist it is compacted
Denaturation, therefore thermal stability keeps good, the thermal stability under alloy service state can be improved, while by being heat-treated to it,
Enhance mechanical property, there is such aluminum alloy plate materials performance under higher intensity and high temperature exposure to stablize, and enhance light weight
Change the competitiveness of aluminum alloy plate materials, promotes extensive use of the aluminium alloy on automobile and aircraft.
To achieve the goals above, the technical solution adopted by the present invention is that:
A kind of thermostabilization 6xxx line aluminium alloy, by percentage to the quality, consisting of:
Remaining is Al and trace impurity.
The mass ratio of the Mg and Si is between 2~3, and the mass ratio of Mg and Si is not equal to 2；Mg, Si and Cu's always contains
Amount not less than 2.4%, Si and Cu relative to Mg mass ratio [(Si+0.5 × Cu)/Mg] less than 1.
The composition of the trace impurity are as follows: Fe < 0.2, Zn < 0.1, Ti < 0.05, Cr < 0.3.
The present invention also provides its heat treatment process: after solution hardening processing, being heat-treated, is heat-treated in 60 minutes
Temperature is 160 DEG C~200 DEG C, heat treatment time 5~30 hours.
Compared with prior art, the beneficial effects of the present invention are:
1. the novel 6xxx line aluminium alloy that the present invention designs, thermal stability at high operating temperatures is closed than existing 6xxx system aluminium
The golden time extends 40-60h, can be with using on the severe high-speed cruising means of transport of high-speed rail, this use environment of fighter plane
Improve military service safety and life factor.
2. novel 6xxx line aluminium alloy proposed by the present invention is after heat treatment, existing alloy is compared, elongation percentage is in holding
Yield strength can promote 40-50MPa simultaneously.The heat treatment method of offer can improve the mechanical property of aluminium alloy element, mention
The quality for rising aluminum alloy plate materials, it is more extensive to enable aluminum alloy to utilization.
Detailed description of the invention
Fig. 1 is the creep curve schematic diagram of comparative example and embodiment aluminum alloy plate materials of the present invention.
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.Embodiment sample used is commercialization 6xxx system and novel 6xxx line aluminium alloy.
Wherein, comparative example sample used is divided into commercial alloy 6013 and alloy A, and (magnesium is siliceous for 6013 chemical component
Ratio is measured close to 1) are as follows: Mg 1.05wt.%, Si 0.95wt.%, Cu 0.5wt.%, Mn 0.10wt.%, Cr 0.11wt.%,
Ti 0.10wt.%, Fe 0.23wt.%, remaining is aluminium；The chemical component (magnesium silicon mass ratio close to 2) of A are as follows: Mg
0.98wt.%, Si 0.52wt.%, Cu 0.81wt.%, Mn 0.13wt.%, Cr 0.13wt.%, Ti 0.11wt.%, Fe
0.23wt.%, remaining is aluminium.Embodiment sample used is divided into alloy B, chemical component (magnesium silicon mass ratio close to 2.6) are as follows: Mg
1.05wt.%, Si 0.41wt.%, Cu 1.08wt.%, Mn 0.13wt.%, Cr 0.13wt.%, Ti 0.11wt.%, Fe
0.23wt.%, remaining is aluminium；
Alloy rigidity test carries out on Vickers hardness tester, and experiment load is 4.9N, duration 15s.It draws
Test is stretched using standard are as follows: GB/T 228-2002.High-temerature creep ag(e)ing test is in the RMT-D10 for thinking carefully the production of Tai Jie company
It is carried out on type electronic type high-temerature creep permanent strength testing machine, the temperature-controlled precision of testing machine is ± 2 DEG C, and load precision is ± 3N.
Following embodiment is devised based on considerations above:
Comparative example 1
Existing 6013 aluminium alloy carries out 180 DEG C of peak value timeliness after carrying out solution treatment water quenching in air circulation resistance furnace,
It obtains aluminum alloy plate materials and carries out room temperature tensile test.
Comparative example 2
Existing 6013 aluminium alloy carries out peak value timeliness after carrying out solution treatment water quenching in air circulation resistance furnace, obtains aluminium conjunction
Golden plate material carries out creep test in creep machine, and creep ageing temperature chooses 250 DEG C, creep time 60h, and creep stress is
100MPa。
Comparative example 3
A aluminium alloy carries out 180 DEG C of peak value timeliness after carrying out solution treatment water quenching in air circulation resistance furnace, obtains aluminium alloy
Plate carries out room temperature tensile test.
Comparative example 4
A aluminium alloy carries out peak value timeliness after carrying out solution treatment water quenching in air circulation resistance furnace, obtains aluminum alloy plate materials
Creep test is carried out in creep machine, creep ageing temperature chooses 250 DEG C, creep time 60h, creep stress 100MPa.
Embodiment 1
After novel 6xxx line aluminium alloy B carries out solution treatment water quenching in air circulation resistance furnace, when carrying out 180 DEG C of peak values
Effect obtains aluminum alloy plate materials and carries out room temperature tensile test.
Embodiment 2
After novel 6xxx line aluminium alloy B carries out solution treatment water quenching in air circulation resistance furnace, aluminum alloy plate materials are obtained, so
Creep test is carried out in creep machine afterwards, creep ageing temperature chooses 250 DEG C, creep time 100h, and creep stress is
100MPa。
1 embodiment of table and the corresponding process post-tensioning performance of comparative example (volume unit: MPa)
| Comparative example 1 | Comparative example 3 | Embodiment 1 | |
| Yield strength | 319.0 | 323.57 | 371.2 |
| Tensile strength | 441.6 | 462.6 | 469.20 |
| Elongation after fracture | 10.95% | 9.30% | 9.95% |
Table 1 is that tensile strength after identical aging strengthening model of novel 6xxx line aluminium alloy and comparative example, surrender are strong
Degree, elongation after fracture.Fig. 1 is the creep curve that comparative example and embodiment change over time, since comparative example 1 was at 10 hours
With regard to creep rupture occurs, creep curve is not drawn in figure.From these icons it is recognised that novel 6xxx system of the invention alloy
Creep-resistant property is good under high temperature environment, and thermal stability extends 40-60h compared to tradition 6xxx line aluminium alloy, while using new
Alloy, yield strength promotes 40-50MPa (traditional 6xxx system conjunction while novel 6xxx system alloy elongation percentage can be made to keep
Golden yield strength is 310-330MPa).
Above data proves that aluminum alloy heat stabilization and mechanics can be improved in novel 6xxx line aluminium alloy proposed by the present invention
Performance expands the application range of 6xxx line aluminium alloy.
Claims (4)
1. a kind of thermostabilization 6xxx line aluminium alloy, which is characterized in that by percentage to the quality, consisting of:
Remaining is Al and trace impurity.
2. thermostabilization 6xxx line aluminium alloy according to claim 1, which is characterized in that the mass ratio of the Mg and Si is 2~3
Between, and the mass ratio of Mg and Si is not equal to 2；The total content of Mg, Si and Cu are not less than matter of 2.4%, the Si and Cu relative to Mg
Amount is than [(Si+0.5 × Cu)/Mg] less than 1.
3. thermostabilization 6xxx line aluminium alloy according to claim 1, which is characterized in that the composition of the trace impurity are as follows: Fe <
0.2, Zn < 0.1, Ti < 0.05, Cr < 0.3.
4. the heat treatment process of thermostabilization 6xxx line aluminium alloy described in claim 1, which is characterized in that after solution hardening processing,
It is heat-treated in 60 minutes, heat treatment temperature is 160 DEG C~200 DEG C, heat treatment time 5~30 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811627651.8A CN109457155B (en) | 2018-12-28 | 2018-12-28 | Thermally stable 6xxx series aluminum alloy and heat treatment process thereof |
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| CN201811627651.8A CN109457155B (en) | 2018-12-28 | 2018-12-28 | Thermally stable 6xxx series aluminum alloy and heat treatment process thereof |
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| CN109457155A true CN109457155A (en) | 2019-03-12 |
| CN109457155B CN109457155B (en) | 2020-09-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961890A (en) * | 2020-09-09 | 2020-11-20 | 四川三星新材料科技股份有限公司 | Production process method of section bar for high-conductivity and high-strength aluminum alloy electrical equipment |
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| CN109457155B (en) | 2020-09-08 |
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