CN109852854A - A kind of preparation method of extrusion pressing type weldable aluminium - Google Patents
A kind of preparation method of extrusion pressing type weldable aluminium Download PDFInfo
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- CN109852854A CN109852854A CN201711231834.3A CN201711231834A CN109852854A CN 109852854 A CN109852854 A CN 109852854A CN 201711231834 A CN201711231834 A CN 201711231834A CN 109852854 A CN109852854 A CN 109852854A
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Abstract
The present invention provides a kind of preparation methods of extrusion pressing type weldable aluminium, belong to technical field of aluminium alloy preparation.The present invention is realized by following proposal: being aluminium by the component Zn 5.5wt% of aluminium alloy, Mg 2.0wt%, Mn 0.8wt%, 0.8wt%, Cr 0.5wt%, Zr 0.3wt%, rare earth element 0.1%, total content≤0.3% of inevitable impurity element, surplus; after taking raw material; under protective atmosphere; it will be placed in smelting furnace after melting that D.C.casting obtains ingot casting with the raw material that takes; after ingot casting is cooling; under protective atmosphere; extrusion molding after Homogenization Treatments obtains high-strength extrusion pressing type aluminium alloy.The present invention solves the problems, such as existing aluminium alloy there are welding performances to be difficult to match with high intensity.Operation of the present invention is simple, is easy to implement industrialized production.
Description
Technical field
The present invention relates to a kind of preparation methods of aluminium alloy；In particular to a kind of preparation side of extrusion pressing type weldable aluminium
Method.
Background technique
Aluminium alloy is most widely used one kind non-ferrous metal structural material in industry, in Aeronautics and Astronautics, automobile, machinery
It has been widely applied in manufacture, ship and chemical industry.With scientific and technical and industrial economy rapid development in recent years, to aluminium
The demand of alloy welding structural element is increasing, and the Research on Weldability enabled aluminum alloy to is also goed deep into therewith.For a long time, aerospace
Field suffers from very urgent demand to high strength weldable aluminium, and traditional 7XXX (Al-Zn-Mg) is that weldable aluminium is often strong
Degree is not high, and aluminium alloy of the intensity higher than 500MPa is all difficult to be welded.Traditional 7XXX (Al-Zn-Mg) is that solderable aluminium closes
Gold includes middle strength aluminum alloy and high strength alumin ium alloy by the intensity difference of alloy, but without specific boundary.Middle strength aluminum alloy it is strong
Spend it is relatively low, and Cu content 0.1% hereinafter, be weldable aluminium, the intensity of high strength alumin ium alloy is relatively high, and Zn, Mg
Content is higher, and contains a certain amount of Cu, as 7A52 al alloy component is calculated as Zn4.0-4.8%, Mg2.0-2.8%, Mn0.2-
0.5%, Zr0.05-0.15%, Cr0.15-0.25%, Cu0.05-0.2%, Ti0.05-0.18, surplus Al, are used in this
The consistent welding wire of alloy compositions, after argon arc welding, the tensile strength of welding point also can only achieve 358MPa, and yield strength is
238MPa。
Summary of the invention
The purpose of the present invention is to provide a kind of superior weldabilities that is provided simultaneously with can be with high-intensitive Al-Zn-Mg-Cu alloy
Preparation method solves the problems, such as existing aluminium alloy there are welding performances to be difficult to match with high intensity.
A kind of preparation method of extrusion pressing type weldable aluminium of the present invention, includes the following steps:
Step 1 ingredient
By the component of aluminium alloy: Zn 5.5wt%, Mg 2.0wt%, Mn 0.8wt%, 0.8wt%, Cr 0.5wt%, Zr
0.3wt%, rare earth element 0.1%, total content≤0.3% of inevitable impurity element, surplus be aluminium, with take pure Al, pure Mg,
Pure Zn, pure Cu, Al-Mn intermediate alloy, Al-Cr intermediate alloy, Al- rare earth element intermediate alloy, Al-Zr intermediate alloy are as former
Material, the rare earth element are selected from least one of Sc, Er；
The preparation of step 2 alloy
Under protective atmosphere, step 1 is placed in smelting furnace D.C.casting after melting with the raw material taken and obtains ingot casting, ingot casting
After cooling, under protective atmosphere, Homogenization Treatments, extrusion forming obtains extrusion pressing type aluminium alloy；
The intensive treatment of step 3 alloy
Under protective atmosphere, extrusion pressing type aluminium alloy obtained by step 2 is obtained into high-strength squeeze after solution treatment, ageing treatment
Die mould aluminium alloy.
A kind of preparation method of extrusion pressing type weldable aluminium of the present invention, the pure Al, pure Mg, pure Zn, pure Cu purity >=
99.99%.
A kind of 4 preparation methods of extrusion pressing type weldable aluminium of the present invention, the Al-Mn intermediate alloy are Al-10wt.%
Mn, Al-Cr intermediate alloy be Al-5wt.%Cr, Al- rare earth element intermediate alloy be Al-2wt.%Sc or Al-2wt.%Er,
Al-Zr intermediate alloy is Al-5wt.%Zr.
A kind of preparation method of extrusion pressing type weldable aluminium of the present invention, in-furnace temperature is 725 DEG C when casting, and fire door temperature is
706 DEG C, Rose Box inlet temperature is 701 DEG C, and dock door temperature is 681 DEG C, and platform end temperature is 663 DEG C；Casting speed
For 25-35mm/min, cooling water flow 20-30m3/ h, the water temperature of cooling water outlet are 22 DEG C.
A kind of preparation method of extrusion pressing type weldable aluminium of the present invention, the temperature of Homogenization Treatments are 460 DEG C, at homogenization
The time of reason is for 24 hours；The temperature of solution treatment is 460 DEG C, and the time of solution treatment is 90min；The ageing treatment is twin-stage
The condition of ageing treatment, two-stage time effect processing is that level-one aging temp is 105 DEG C, aging time 9h, and secondary aging temperature is
135 DEG C, aging time 15h.
A kind of preparation method of extrusion pressing type weldable aluminium of the present invention, the protective atmosphere is in nitrogen, argon gas, helium
One kind.
A kind of preparation method of extrusion pressing type weldable aluminium of the present invention, the protective atmosphere is in nitrogen, argon gas, helium
One kind.
Principle and advantage
The present inventor is by making repeated attempts and largely testing, after the proportional amount for having adjusted Cu, Mn, Cr in alloy,
And simultaneously by the way that trace rare-earth element Sc and/or Er is added, it is suppressed that dynamic recrystallization of the alloy in hot procedure, thus
Obtain the aluminium alloy of high comprehensive performance；By Homogenization Treatments, solution treatment and ageing treatment aluminium alloy is crystallized
Uniformly, to improve the performance of aluminium alloy；And it is found surprisingly that the welding performance ratio 7A52 aluminium alloy of finished product of the invention is excellent
Different, the room temperature tensile intensity of welding point is significantly larger than existing similar product on the market.
Specific embodiment
Embodiment 1
Alloying component (by weight percentage) Zn 5.5wt%, Mg 2.0wt%, Mn 0.8wt%, 0.8wt%, Cr
0.5wt%, Zr 0.3wt%, Sc 0.1%, Fe≤0.2%；Si≤0.1%；Surplus is Al；By mentioned component with take pure Al,
Pure Mg, pure Zn, pure Cu, Al-10wt.%Mn, Al-5wt.%Cr, Al-2wt.%Sc and Al-5wt.%Zr as raw material,
In pure Al, pure Mg, pure Zn, pure Cu purity > 99.99wt.%；It is melted alloy is carried out in 10 tons of smelting furnaces with the raw material taken
Refining, obtains ingot casting after D.C.casting, and in-furnace temperature is 725 DEG C when casting, and fire door temperature is 706 DEG C, and Rose Box inlet temperature is 701
DEG C, dock door temperature is 681 DEG C, and platform end temperature is 663 DEG C；Casting speed is 25-35mm/min, and cooling water flow is
28m3/ h, the water temperature of cooling water outlet are 22 DEG C., after ingot casting is cooling, under an argon atmosphere 460 DEG C of Homogenization Treatments for 24 hours,
Then extrusion forming takes part molding style to carry out melting welding, and a part for welding style directly carries out stretching detection, at homogenization
The temperature of reason is 460 DEG C, and the time of Homogenization Treatments is for 24 hours；The temperature of solution treatment is 460 DEG C, and the time of solution treatment is
90min；The ageing treatment is two-stage time effect processing, and the condition of two-stage time effect processing is that level-one aging temp is 105 DEG C, when
The effect time is 9h, and secondary aging temperature is 135 DEG C, aging time 15h.
Claims (7)
1. a kind of preparation method of extrusion pressing type weldable aluminium, it is characterised in that include the following steps:
Step 1 ingredient
By the component of aluminium alloy: Zn 5.5wt%, Mg 2.0wt%, Mn 0.8wt%, 0.8wt%, Cr 0.5wt%, Zr
0.3wt%, rare earth element 0.1%, total content≤0.3% of inevitable impurity element, surplus be aluminium, with take pure Al, pure Mg,
Pure Zn, pure Cu, Al-Mn intermediate alloy, Al-Cr intermediate alloy, Al- rare earth element intermediate alloy, Al-Zr intermediate alloy are as former
Material, the rare earth element are selected from least one of Sc, Er；
The preparation of step 2 alloy
Under protective atmosphere, step 1 is placed in smelting furnace D.C.casting after melting with the raw material taken and obtains ingot casting, ingot casting is cooling
Afterwards, under protective atmosphere, Homogenization Treatments, extrusion forming obtains extrusion pressing type aluminium alloy.
2. a kind of preparation method of extrusion pressing type weldable aluminium according to claim 1, it is characterised in that: in protective atmosphere
Under, extrusion pressing type aluminium alloy obtained by step 2 is obtained into high-strength extrusion pressing type aluminium alloy after solution treatment, ageing treatment.
3. a kind of preparation method of extrusion pressing type weldable aluminium according to claim 1, it is characterised in that: the pure Al,
Purity >=99.99% of pure Mg, pure Zn, pure Cu.
4. a kind of preparation method of extrusion pressing type weldable aluminium according to claim 1, it is characterised in that: the Al-Mn
Intermediate alloy is Al-10wt.%Mn, and Al-Cr intermediate alloy is Al-5wt.%Cr, and Al- rare earth element intermediate alloy is Al-
2wt.%Sc or Al-2wt.%Er, Al-Zr intermediate alloy are Al-5wt.%Zr.
5. an a kind of preparation method for extrusion pressing type weldable aluminium according to claim 1, it is characterised in that: furnace when casting
Interior temperature is 725 DEG C, and fire door temperature is 706 DEG C, and Rose Box inlet temperature is 701 DEG C, and dock door temperature is 681 DEG C, platform
Terminal temperature is 663 DEG C；Casting speed is 25-35mm/min, cooling water flow 20-30m3/ h, the water of cooling water outlet
Temperature is 22 DEG C.
6. a kind of preparation method of high-strength extrusion pressing type aluminium alloy according to claim 1, it is characterised in that: Homogenization Treatments
Temperature be 460 DEG C, time of Homogenization Treatments is for 24 hours；The temperature of solution treatment is 460 DEG C, and the time of solution treatment is
90min；The ageing treatment is two-stage time effect processing, and the condition of two-stage time effect processing is that level-one aging temp is 105 DEG C, when
The effect time is 9h, and secondary aging temperature is 135 DEG C, aging time 15h.
7. a kind of preparation method of high-strength extrusion pressing type aluminium alloy according to claim 1, it is characterised in that: the protection gas
Atmosphere is selected from one of nitrogen, argon gas, helium.
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| CN201711231834.3A CN109852854A (en) | 2017-11-30 | 2017-11-30 | A kind of preparation method of extrusion pressing type weldable aluminium |
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| CN201711231834.3A CN109852854A (en) | 2017-11-30 | 2017-11-30 | A kind of preparation method of extrusion pressing type weldable aluminium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111020423A (en) * | 2019-12-27 | 2020-04-17 | 北京首航科学技术开发有限公司 | Light ultrahigh-strength aluminum alloy nut and aluminum alloy material |
| CN114990395A (en) * | 2022-04-13 | 2022-09-02 | 山东南山铝业股份有限公司 | High-strength wrought aluminum alloy containing rare earth elements and preparation method thereof |
-
2017
- 2017-11-30 CN CN201711231834.3A patent/CN109852854A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111020423A (en) * | 2019-12-27 | 2020-04-17 | 北京首航科学技术开发有限公司 | Light ultrahigh-strength aluminum alloy nut and aluminum alloy material |
| CN114990395A (en) * | 2022-04-13 | 2022-09-02 | 山东南山铝业股份有限公司 | High-strength wrought aluminum alloy containing rare earth elements and preparation method thereof |
| CN114990395B (en) * | 2022-04-13 | 2024-01-16 | 山东南山铝业股份有限公司 | High-strength deformed aluminum alloy containing rare earth elements and preparation method thereof |
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Application publication date: 20190607 |
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