CN108624791A - A kind of Al-Zn-Mg aluminum alloy materials and its preparation method and application - Google Patents
A kind of Al-Zn-Mg aluminum alloy materials and its preparation method and application Download PDFInfo
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- CN108624791A CN108624791A CN201810449520.9A CN201810449520A CN108624791A CN 108624791 A CN108624791 A CN 108624791A CN 201810449520 A CN201810449520 A CN 201810449520A CN 108624791 A CN108624791 A CN 108624791A
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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
- C22C21/10—Alloys based on aluminium with zinc 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
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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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
- C22F1/053—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 present invention relates to a kind of Al Zn Mg aluminum alloy materials and its preparation method and application.The Al Zn Mg aluminum alloy materials include the chemical composition of following weight percent：Zn=4.2~5.2%, Mg=0.8~1.6%, Cu=0.05~0.3%, Mn=0.15~0.45%, Cr=0.10~0.40%, Zr=0.10~0.20%, Ti=0.02~0.10%, V=0.01 0.06%, Fe<0.2%, Si<0.15%, other impurity element total amounts are no more than 0.15%, and single impurity content is no more than 0.05%, surplus Al.The present invention uses specific extrudate preparation process by being optimized and revised to main alloying element content, micro alloying element content, obtains that a kind of intensity is high, corrosion resisting property is good, good welding performance Al Zn Mg aluminum alloy materials.
Description
Technical field
The present invention relates to a kind of Al-Zn-Mg aluminum alloy materials and its preparation method and application, belong to aluminum alloy materials processing
Technical field.
Background technology
The lightweight of the vehicles is the target that people chase always, and the application of high-strength light structural material can significantly drop
The fuel consumption of the low vehicles improves conevying efficiency.
Aluminium alloy is because of its light weight, corrosion resistance is good, easy processing is widely used as the necks such as rail traffic, aerospace due to the features such as
The structural material in domain.And wherein Al-Zn-Mg line aluminium alloys are that heat treatment can reinforced alloys.After ageing treatment, intensity can be big
Amplitude rises；Favored by people simultaneously as its density is small, becomes the structural material of the first choice such as rail traffic, aerospace.
However, during vehicles long service, component (especially at Member Welding) is often because of etching medium
It acts on and corrodes, cause component premature deterioration, service life to greatly shorten when serious, or even endanger safe traffic.
Therefore, how to obtain high, corrosion-resistant, the good high combination property of welding performance the Al-Zn-Mg aluminium alloys of intensity at
For this field technical problem urgently to be resolved hurrily.
Invention content
That in order to solve the above technical problem, the present invention provides a kind of intensity is high, corrosion resisting property is good, good welding performance Al-
Zn-Mg aluminum alloy materials.By being optimized and revised to main alloying element content, micro alloying element content, and using specific
Extrudate preparation process has regulated and controled microstructure state of the aluminium alloy in extrudate preparation process, so that should
Aluminum alloy extrusion section bar has good comprehensive performance.
A kind of Al-Zn-Mg aluminum alloy materials, include the chemical composition of following weight percent：Zn=4.2~5.2%, Mg
=0.8~1.6%, Cu=0.05~0.3%, Mn=0.15~0.45%, Cr=0.10~0.40%, Zr=0.10~
0.20%, Ti=0.02~0.10%, V=0.01-0.06%, Fe<0.2%, Si<0.15%, other impurity element total amounts are not
More than 0.15%, single impurity content is no more than 0.05%, surplus Al.
As one of embodiment of the present invention, the Al-Zn-Mg aluminum alloy materials include the change of following weight percent
It studies point：Zn=4.5~4.6%, Mg=1.2~1.3%, Cu=0.04~0.06%, Mn=0.45~0.45%, Cr=
0.10~0.12%, Zr=0.18~0.20%, Ti=0.08~0.10%, V=0.01-0.02%, Fe<0.2%, Si<
0.15%, other impurity element total amounts are no more than 0.15%, and single impurity content is no more than 0.05%, surplus Al.
As one of embodiment of the present invention, the Al-Zn-Mg aluminum alloy materials include the change of following weight percent
It studies point：Zn=5.1~5.2%, Mg=0.8~0.85%, Cu=0.25~0.3%, Mn=0.15~0.2%, Cr=
0.35~0.40%, Zr=0.10~0.12%, Ti=0.02~0.03%, V=0.05-0.06%, Fe<0.2%, Si<
0.15%, other impurity element total amounts are no more than 0.15%, and single impurity content is no more than 0.05%, surplus Al.
As one of embodiment of the present invention, the Al-Zn-Mg aluminum alloy materials include the change of following weight percent
It studies point：Zn=4.2~4.3%, Mg=1.5~1.6%, Cu=0.1~0.2%, Mn=0.3~0.4%, Cr=0.2~
0.3%, Zr=0.10~0.15%, Ti=0.09~0.10%, V=0.02-0.04%, Fe<0.2%, Si<0.15%,
Its impurity element total amount is no more than 0.15%, and single impurity content is no more than 0.05%, surplus Al.
In addition, Al-Zn-Mg aluminum alloy materials of the present invention are also with one or more in following feature：
(1) tensile strength is more than 350MPa；
(2) elongation is more than 15.0%；
(3) exfoliation Corrosion is better than EA grades；
(4) slow strain rate tension stress corrosion Sensitivity Index<5%；
(5) MIG plumb joints strength factor>0.8.
The present invention also provides the preparation methods of above-mentioned Al-Zn-Mg aluminum alloy materials, including：By raw material through founding, uniformly
Change, squeeze, quench, ageing treatment, obtains the Al-Zn-Mg aluminum alloy materials of high combination property.
Preferably, the method may also include founding, homogenization, milling face, heating, extruding, solid solution, quenching, timeliness, and
The processes such as inspection, packaging, storage.
Preferably, the casting temperature is 700-720 DEG C, further preferred 710 DEG C.
Preferably, the homogenization conditio is：460-480 DEG C/8h, further preferred 470 DEG C/8h.
Preferably, the extruding temperature is 450~500 DEG C；Further preferably 470 DEG C.The extrusion ratio is 10-20.
Preferably, the quenching cooling rate is not less than 180 DEG C/s.
Preferably, the aging condition is：(20~60 DEG C/48~720h)+(120~130 DEG C/16~for 24 hours)+(170~
180 DEG C/8~for 24 hours)；It is preferred that 25 DEG C/72h+120 DEG C /+180 DEG C for 24 hours/8h.
The present invention also provides above-mentioned Al-Zn-Mg aluminum alloy extrusion section bars in rail traffic, aerospace, new-energy automobile
Application in equal fields.
The present invention is by optimizing and revising main alloying element content, micro alloying element content, using current commercial
The producing equipment and flow for producing Al-Zn-Mg extrudates influence to advise grasping the alloy profile microstructure on multinomial performance
On the basis of rule, by reasonably regulating and controlling the temperature range of each process, obtain that a kind of intensity is high, corrosion resisting property is good, welding performance
Good Al-Zn-Mg aluminum alloy extrusion section bars, reduce the production cost of high combination property extrudate.
Specific implementation mode
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Gained aluminium alloy is tested for the property using following standard in the present invention：
(1) room temperature tensile properties of squeeze wood are tested is made standard tensile specimen according to national standard GB/T228-2002, stretches
Speed is 2mm/min；
(2) Peeling Corrosion soak test is carried out by standard GB/T/T 22639-2008；
(3) slow-drawing stress corrosion test is carried out according to GB/T 15970.7-2000 standards, and initial strain rate is
10-6s-1, medium is respectively air and 3.5%NaCl aqueous solutions；
(4) welding of squeeze wood is carried out according to ISO 15614-2-2005；
(5) standard tensile specimen is made by national standard GB/T228-2002 in plumb joint room temperature tensile properties, and tensile speed is
2mm/min。
Embodiment 1-3
Embodiment 1-3 provides a kind of Al-Zn-Mg aluminum alloy materials, specific ingredient (weight percent) such as table 1.
Table 1
Wherein, miscellaneous amount indicates impurity element total amount (weight percent).
The preparation method of Al-Zn-Mg aluminum alloy materials described in Examples 1 to 3, including：Founding-homogenization-milling face-adds
Heat-extruding-quenching-aging sequence；Wherein, the specific feature energy number of each process is as shown in table 2.
Table 2
Comparative example 1-3
Comparative example 1-3 provides a kind of Al-Zn-Mg aluminum alloy materials, specific ingredient (weight percent) such as table 3.
Table 3
Wherein, miscellaneous amount indicates impurity element total amount (weight percent).
The preparation method of 1~3 Al-Zn-Mg aluminum alloy materials of comparative example, including：Founding-homogenization-milling face-adds
Heat-extruding-quenching-aging sequence；Wherein, the specific feature energy number of each process is as shown in table 4.
Table 4
Compliance test result
The aluminum alloy materials that above-mentioned all embodiments are obtained carry out performance detection using aforementioned detection method, as a result such as table
5。
Table 5
By above-mentioned testing result it is found that the performance characteristics of Al-Zn-Mg aluminum alloy materials obtained by Examples 1 to 3：(1) tension
Intensity is more than 350MPa；(2) elongation is more than 15.0%；(3) exfoliation Corrosion is better than EA grades；(4) slow strain rate tension
Stress corrosion Sensitivity Index<5%；(5) MIG plumb joints strength factor>0.8.
And the element Zn contents of comparative example 1 are higher, MIG plumb joint strength factors are less than 0.80；
The first order aging temp of comparative example 2 is higher, slow strain rate tension stress corrosion Sensitivity Index>5%, MIG
Plumb joint strength factor is less than 0.80；
Heating temperature before the extruding of comparative example 3 is higher, and exfoliation Corrosion is less than EA, and slow strain rate tension stress is rotten
Lose Sensitivity Index>5%.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (10)
1. a kind of Al-Zn-Mg aluminum alloy materials, which is characterized in that include the chemical composition of following weight percent：Zn=4.2
~5.2%, Mg=0.8~1.6%, Cu=0.05~0.3%, Mn=0.15~0.45%, Cr=0.10~0.40%, Zr=
0.10~0.20%, Ti=0.02~0.10%, V=0.01-0.06%, Fe<0.2%, Si<0.15%, other impurity elements
Total amount is no more than 0.15%, and single impurity content is no more than 0.05%, surplus Al.
2. Al-Zn-Mg aluminum alloy materials according to claim 1, which is characterized in that include the change of following weight percent
It studies point：Zn=4.5~4.6%, Mg=1.2~1.3%, Cu=0.04~0.06%, Mn=0.45~0.45%, Cr=
0.10~0.12%, Zr=0.18~0.20%, Ti=0.08~0.10%, V=0.01-0.02%, Fe<0.2%, Si<
0.15%, other impurity element total amounts are no more than 0.15%, and single impurity content is no more than 0.05%, surplus Al.
3. Al-Zn-Mg aluminum alloy materials according to claim 1, which is characterized in that include the change of following weight percent
It studies point：Zn=5.1~5.2%, Mg=0.8~0.85%, Cu=0.25~0.3%, Mn=0.15~0.2%, Cr=
0.35~0.40%, Zr=0.10~0.12%, Ti=0.02~0.03%, V=0.05-0.06%, Fe<0.2%, Si<
0.15%, other impurity element total amounts are no more than 0.15%, and single impurity content is no more than 0.05%, surplus Al.
4. Al-Zn-Mg aluminum alloy materials according to claim 1, which is characterized in that include the change of following weight percent
It studies point：Zn=4.2~4.3%, Mg=1.5~1.6%, Cu=0.1~0.2%, Mn=0.3~0.4%, Cr=0.2~
0.3%, Zr=0.10~0.15%, Ti=0.09~0.10%, V=0.02-0.04%, Fe<0.2%, Si<0.15%,
Its impurity element total amount is no more than 0.15%, and single impurity content is no more than 0.05%, surplus Al.
5. according to any Al-Zn-Mg aluminum alloy materials of claim 1-4, which is characterized in that have in following feature
It is one or more：
(1) tensile strength is more than 350MPa；
(2) elongation is more than 15.0%；
(3) exfoliation Corrosion is better than EA grades；
(4) slow strain rate tension stress corrosion Sensitivity Index<5%；
(5) MIG plumb joints strength factor>0.8.
6. a kind of preparation method of Al-Zn-Mg aluminum alloy materials, which is characterized in that including：By raw material through founding, homogenization, squeeze
Pressure, quenching, ageing treatment to get.
7. preparation method according to claim 6, which is characterized in that the extruding temperature is 450~500 DEG C；Preferably
470℃。
8. the preparation method described according to claim 6 or 7, which is characterized in that the extrusion ratio of the extruding is 10-20.
9. according to any preparation methods of claim 6-8, which is characterized in that the aging condition is：(20~60 DEG C/
48~720h)+(120~130 DEG C/16~for 24 hours)+(170~180 DEG C/8~for 24 hours)；It is preferred that 25 DEG C/72h+120 DEG C/for 24 hours+180
℃/8h。
10. any Al-Zn-Mg aluminum alloy materials of claim 1-5 are in rail traffic, aerospace, new-energy automobile
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109957688A (en) * | 2019-03-22 | 2019-07-02 | 广西南南铝加工有限公司 | A kind of preparation method of the big specification rectangle ingot of Al-Zn-Mg |
| CN112267052A (en) * | 2020-09-23 | 2021-01-26 | 山东兖矿轻合金有限公司 | 7XXX aluminum alloy seamless square tube and extrusion process thereof |
| CN112708812A (en) * | 2020-12-18 | 2021-04-27 | 亚太轻合金(南通)科技有限公司 | 7XXX series aluminum alloy and preparation method thereof |
| CN114080460A (en) * | 2021-07-30 | 2022-02-22 | 三菱铝株式会社 | High-strength high-elongation aluminum alloy and aluminum alloy extrusion material |
| RU2771396C1 (en) * | 2020-12-29 | 2022-05-04 | Общество с ограниченной ответственностью "Институт легких материалов и технологий" | Aluminium-based alloy and product made therefrom |
| CN116043079A (en) * | 2022-12-28 | 2023-05-02 | 优模(上海)新材料科技有限公司 | High-strength and high-toughness aluminum alloy and hollow structural section bar thereof and preparation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109957688A (en) * | 2019-03-22 | 2019-07-02 | 广西南南铝加工有限公司 | A kind of preparation method of the big specification rectangle ingot of Al-Zn-Mg |
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| CN112267052A (en) * | 2020-09-23 | 2021-01-26 | 山东兖矿轻合金有限公司 | 7XXX aluminum alloy seamless square tube and extrusion process thereof |
| CN112708812A (en) * | 2020-12-18 | 2021-04-27 | 亚太轻合金(南通)科技有限公司 | 7XXX series aluminum alloy and preparation method thereof |
| RU2771396C1 (en) * | 2020-12-29 | 2022-05-04 | Общество с ограниченной ответственностью "Институт легких материалов и технологий" | Aluminium-based alloy and product made therefrom |
| CN114080460A (en) * | 2021-07-30 | 2022-02-22 | 三菱铝株式会社 | High-strength high-elongation aluminum alloy and aluminum alloy extrusion material |
| CN116043079A (en) * | 2022-12-28 | 2023-05-02 | 优模(上海)新材料科技有限公司 | High-strength and high-toughness aluminum alloy and hollow structural section bar thereof and preparation method |
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Application publication date: 20181009 |