CN105908029A - Non-rapidly solidified aluminum alloy with super strength and preparation method thereof - Google Patents
Non-rapidly solidified aluminum alloy with super strength and preparation method thereof Download PDFInfo
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- CN105908029A CN105908029A CN201610432186.7A CN201610432186A CN105908029A CN 105908029 A CN105908029 A CN 105908029A CN 201610432186 A CN201610432186 A CN 201610432186A CN 105908029 A CN105908029 A CN 105908029A
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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
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
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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
Abstract
The invention discloses a 770MPa-level non-rapidly solidified aluminum alloy with the super strength and a preparation method thereof and belongs to the field of super aluminum alloy preparation technology. In the aluminum alloy, the mass percent of zinc is from 8.8% to 9.4%, the mass percent of magnesium is from 2.75% to 2.85%, the mass percent of copper is from 1.8% to 2.2%, the mass percent of zirconium is from 0.25% to 0.55%, the mass percent of strontium is from 0% to 0.025%, the balance is aluminum, and the ratio of the mass percent of Zn and that of Mg in the alloying elements shall meet that WtZn /WtMg is less than or equal to 4 and greater than or equal to 3, and the mass percent of Mg shall meet that WtMg is less than or equal to 3% and greater than or equal to 2%. The preparation technology of the alloy successively comprises: casting, homogenizing anneal, hot extrusion, solution treatment and aging treatment; the strength of extension of the obtained aluminum alloy is 770MPa; meanwhile, the ductility is more than 7.0%; the technology is simple; the cost is low; and the aluminum alloy is beneficial to industrialization.
Description
Technical field
The invention belongs to metal alloy field, particularly relate to a kind of 770MPa grade super strength non-rapid solidification aluminium alloy and
Preparation method.
Background technology
Aluminium alloy is typical lightweighting materials, has that density is low, intensity is high, good toughness, processing corrosion-resistant, easy, easily returns
The features such as receipts, low cost of manufacture, the basic industries strength that can rely on are strong, civil-military inosculation is good, its combination property or a certain heavy
The great-leap-forward wanting individual event performance promotes, and for the development of different times Advanced Equipment, serves the strongest supporting role.
For a long time, develop that intensity rank aluminium alloy always higher, combination property more balance optimizing is very important grinds
Studying carefully problem, it is all that it is related to national Aero-Space, weaponry, general industry, resources conservation, environmental conservation etc.
Multi-field level of development, one of the most most hotly competitive science and technology field.
The mid-90 in 20th century, developed country uses reaction-injection moulding flash set technology successfully to have developed 750MPa
Intensity level superduralumin alloy, its exemplary alloy is RSA7034 (Al-11Zn-2.3Mg-1Cu), marches at the forefront of the world.But
It is that the preparation of reaction-injection moulding flash set technology is difficult to prepare large-scale ingot blank aluminium alloy, and price is high, limits its application.
Chinese patent CN101338391 discloses one to be had high intensity height and prolongs toughness rapid solidification block aluminum alloy and system thereof
Preparation Method, but although this rapid solidification block aluminum alloy intensity is high, but preparation technology is reaction-injection moulding rapid solidification skill
Art, cost is the highest, and this technology can only prepare millimetre-sized block aluminum alloy, basically can not be applied in actual production.
Chinese patent CN102127665 discloses and a kind of can use as super High Strength Cast Aluminum Alloy
Al-Zn-Mg-Cu-Sc-Zr-RE alloy and preparation method thereof, wherein RE is Er or Yb both yttriums,
Both elements are thulium, and price is relatively costly, and cost of material is higher, aluminium alloy prepared by the most this method
Maximum pulling strength can reach 605MPa, does not has substantive breakthroughs compared with international most advanced level.
Chinese patent CN103993211 discloses a kind of 720-750MPa superelevation strong non-rapid solidification aluminium alloy and preparation side thereof
Method, the intensity of this aluminium alloy can reach 720-750MPa, but patent only gives the composition of alloy, to master alloying unit
Relation between cellulose content is not defined, and has certain limitation, and this alloy need to be through founding-homogenize
Annealing-hot extrusion-pre-recovery annealing-solution treatment-predeformation-Ageing Treatment, processes technique up to seven road, and technique is relatively cumbersome,
It is unfavorable for industrialized production, and some of which technique there is also the space of optimization.
Up to the present, not yet there is a kind of 770MPa grade super strength non-rapid solidification aluminium alloy with independent intellectual property right
And preparation method thereof available, this constrains the industrial expansions such as China's Aero-Space, weaponry to a certain extent.
Summary of the invention
It is an object of the invention to be designed by composition design and technology of preparing, a kind of 770MPa grade super strength non-rapid of invention
Solidification aluminium alloy and preparation method thereof.
The technical scheme is that
A kind of 770MPa grade super strength non-rapid solidification aluminium alloy, it is characterised in that: this aluminium alloy mainly by aluminum (Al),
Zinc (Zn), magnesium (Mg), copper (Cu), zirconium (Zr) and strontium (Sr) composition, wherein, the quality hundred of zinc (Zn)
Proportion by subtraction is 8.8～9.4%, and the mass percent of magnesium (Mg) is 2.75～2.85%, and the mass percent of copper (Cu) is 1.8～2.2%,
The mass percent of zirconium (Zr) is 0.25～0.55%, and the mass percent of strontium (Sr) is 0～0.025%, and surplus is aluminum,
And the ratio of the mass percent of Zn and Mg meets 3≤Wt in the most guaranteed alloying elementZn/WtMg≤ 4, Mg's
Mass percent WtMgMeet 2%≤WtMg≤ 3%, the main ZnMg hardening constituent in alloy just can be made to obtain maximum
Strengthening effect.
The preparation method of a kind of 770MPa grade super strength non-rapid solidification aluminium alloy, is characterized in that it includes successively: founding
Homogenizing anneal hot extrusion solution treatment Ageing Treatment.
Described founding: its process is to design according to composition, weighs each raw material, wherein the adding of tri-kinds of elements of Cu, Zr, Sr
Entering to use Al-Cu, Al-Zr, Al-Sr intermediate alloy, Al, Zn, Mg all use simple substance, and the particular order of melting is first will
Load weighted Al, Zn, Al-Cu, Al-Zr, Al-Sr are placed in melting in smelting furnace, and smelting temperature is 900 DEG C, treat these five kinds
Stir with titanium alloy bar after melting sources, standing 3min, adding hexachlorethane and argon refine degasification until not having
Gas escapes, and in order to reduce the Mg scaling loss when melting, furnace temperature is down to 800 DEG C, adds Mg, and Mg aluminum to be used
Paper tinsel wraps up, and in order to prevent Mg density low, swims on other liquid alloys, is pressed into liquid alloy with titanium alloy container always
Bottom, stirring with titanium alloy bar after standing insulation 5min, adding hexachlorethane and argon refine degasification until not having gas
Effusion, then furnace temperature is risen to 850 DEG C, it is incubated 10min, is finally cast into ingot.
Described homogenizing anneal: it is characterized in that mechanism of anneal is 420 DEG C × 6h+440 DEG C × 6h+460 DEG C × 6h+465 DEG C
× 12h, annealing terminal temperature is higher, and the composition within alloy can be made more uniform.
Described hot extrusion: it is characterized in that its technique is the alloy after homogenizing anneal to be heated to 480 DEG C and to be incubated 8h laggard
Row extrusion ratio is the extruding of 10:1, and this moderate extrusion ratio can reduce the generation of alloy internal flaw.
Described solution treatment: it is characterized in that Solid solution machine is made as room temperature water after 450 DEG C × 2h+460 DEG C × 2h+470 DEG C × 2h insulation
Quenching, shrend is less than 10s transfer time.
Described Ageing Treatment: it is characterized in that its technique is T6 timeliness, ageing mechanism is 121 DEG C × 24h.
770MPa grade super strength non-rapid solidification aluminium alloy can be obtained.
Beneficial effects of the present invention:
(1) present invention obtains composition of a kind of 770MPa grade super strength non-rapid solidification aluminium alloy and preparation method thereof
Compared to disclosed patent, on composition, difference is substantially, and composition interval is more accurate, and clearly gives in alloy
Relation between main alloy element content, more scientific and reasonable in technique, especially melting, homogenizing anneal and hot extrusion
The optimization of the composition design and processes of technique, more science improves the intensity of aluminium alloy jointly.And see technique on the whole
Substantially simplify, lay the first stone for industrialization.
(2) composition of 770MPa grade super strength non-rapid solidification aluminium alloy that the present invention obtains and preparation method thereof, closes
Gold intensity is high, and elongation percentage remains to be maintained at more than 7% simultaneously, can only manufacture milli with existing reaction-injection moulding flash set technology
The block aluminium alloy of meter level is compared, and this technology can manufacture bigger high strength alumin ium alloy goods, has more use value.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further illustrated.
Embodiment one
Preparation 770MPa grade super strength non-rapid solidification aluminium alloy Al-9.01Zn-2.79Mg-2.14Cu-0.52Zr-0.025
Sr, WtZn/WtMg=3.23, and WtMg=2.79%, meet 3≤WtZn/WtMg≤ 4,2%≤WtMg≤ 3%, it is prepared
Technique is as follows:
(1) founding: design according to mentioned component, weighs each raw material, and wherein the addition of tri-kinds of elements of Cu, Zr, Sr uses
Al-Cu, Al-Zr, Al-Sr intermediate alloy, Al, Zn, Mg all use simple substance, and the particular order of melting is first by weighing well
Al, Zn, Al-Cu, Al-Zr, Al-Sr be placed in melting in smelting furnace, smelting temperature is 900 DEG C, treat these five kinds of raw materials melt
Stir with titanium alloy bar after change, standing 3min, adding hexachlorethane and argon refine degasification until not having gas to escape
Go out, in order to reduce the Mg scaling loss when melting, furnace temperature be down to 800 DEG C, add Mg, and Mg aluminium foil wraps up,
In order to prevent Mg density low, swim on other liquid alloys, be pressed into bottom liquid alloy with titanium alloy container always, quiet
Stirring with titanium alloy bar after putting insulation 5min, adding hexachlorethane and argon refine degasification until not having gas to escape, then
Furnace temperature is risen to 850 DEG C, is incubated 10min, is finally cast into ingot.
(2) homogenizing anneal: the ingot casting that previous step obtains is carried out homogenizing anneal, and mechanism of anneal is 420 DEG C × 6h+440 DEG C
×6h+460℃×6h+465℃×12h。
(3) hot extrusion: carrying out extrusion ratio after the alloy after homogenizing anneal being heated to 480 DEG C and being incubated 8h is 10:1
Extruding, obtain extruded bars.
(4) solution treatment: the extruded bars that previous step obtains is carried out solution treatment, and Solid solution machine is made as
After 450 DEG C × 2h+460 DEG C × 2h+470 DEG C × 2h insulation, room temperature water is quenched, and shrend is less than 10s transfer time.
(5) Ageing Treatment: the bar after solution treatment obtained in the previous step is carried out T6 Ageing Treatment, ageing mechanism is
121℃×24h。
I.e. obtaining described aluminium alloy through above-mentioned steps, test through strength pull, recording this strength of alloy is
770.1MPa, elongation percentage is 8.2%.
Embodiment two
Preparation 770MPa grade super strength non-rapid solidification aluminium alloy Al-9.34Zn-2.84Mg-2.17Cu-0.29Zr-0.025
Sr, WtZn/WtMg=3.29, and WtMg=2.84%, meet 3≤WtZn/WtMg≤ 4,2%≤WtMg≤ 3%, it is prepared
Technique is identical with embodiment one, the aluminium alloy that the present embodiment obtains, and tests through strength pull, and recording maximum pulling strength is
780.8MPa, elongation percentage is 7%.
Embodiment three
Preparation 770MPa grade super strength non-rapid solidification aluminium alloy Al-8.89Zn-2.82Mg-1.85Cu-0.31Zr-0.025
Sr, WtZn/WtMg=3.15, and WtMg=2.82%, meet 3≤WtZn/WtMg≤ 4,2%≤WtMg≤ 3%, it is prepared
Technique is identical with embodiment one, the aluminium alloy that the present embodiment obtains, and tests through strength pull, and recording tensile strength is
776.4MPa, elongation percentage is 7.8%.
Those skilled in the art can suitably adjust the proportioning of each component and strictly enter by above-mentioned steps according to examples detailed above
Row manufacture can obtain preferable 770MPa grade super strength non-rapid solidification aluminium alloy and preparation method thereof.
Part that the present invention does not relate to is the most same as the prior art maybe can use prior art to be realized.
Claims (4)
1. a superhigh intensity non-rapid solidification aluminium alloy, the tensile strength of described aluminium alloy is not less than 770Mpa, elongation percentage remains to be maintained at more than 7% simultaneously, the composition of described aluminium alloy is by aluminum (Al), zinc (Zn), magnesium (Mg), copper (Cu), zirconium (Zr) and strontium (Sr) composition, it is characterized in that: the mass percent of zinc (Zn) is 8.8～9.4%, the mass percent of magnesium (Mg) is 2.75～2.85%, the mass percent of copper (Cu) is 1.8～2.2%, the mass percent of zirconium (Zr) is 0.25～0.55%, the mass percent of strontium (Sr) is 0～0.025%, surplus is aluminum, and the ratio of the mass percent of Zn and Mg should meet 3≤Wt in alloying elementZn/WtMgThe mass percent Wt of≤4, MgMg2%≤Wt should be metMg≤ 3%.
The preparation method of a kind of superhigh intensity non-rapid the most as claimed in claim 1 solidification aluminium alloy, step includes successively: founding homogenizing anneal hot extrusion solution treatment Ageing Treatment, it is characterized in that,
nullDescribed founding，Its process is: design according to composition，Weigh each raw material，Wherein Cu、Zr、The addition of tri-kinds of elements of Sr uses Al-Cu、Al-Zr、Al-Sr intermediate alloy，Al、Zn、Mg all uses simple substance，The particular order of melting is first by load weighted Al、Zn、Al-Cu、Al-Zr、Al-Sr is placed in melting in smelting furnace，Smelting temperature is 900 DEG C，Stir with titanium alloy bar after these five kinds of melting sources，Stand 3min，Add hexachlorethane and argon refine degasification until not having gas to escape，In order to reduce the Mg scaling loss when melting，Furnace temperature is down to 800 DEG C，Add Mg，And Mg aluminium foil wraps up，In order to prevent Mg density low，Swim on other liquid alloys，With titanium alloy container, Mg is pressed into bottom liquid alloy always，Stir with titanium alloy bar after standing insulation 5min，Add hexachlorethane and argon refine degasification until not having gas to escape，Again furnace temperature is risen to 850 DEG C，Insulation 10min，Finally it is cast into ingot；
Described homogenizing anneal: mechanism of anneal is 420 DEG C × 6h+440 DEG C × 6h+460 DEG C × 6h+465 DEG C × 12h；
Described hot extrusion, its technique is: carry out, after the alloy after homogenizing anneal being heated to 480 DEG C and being incubated 8h, the extruding that extrusion ratio is 10:1.
The preparation method of a kind of superhigh intensity non-rapid the most as claimed in claim 2 solidification aluminium alloy, is characterized in that: described solution treatment, after Solid solution machine is made as 450 DEG C × 2h+460 DEG C × 2h+470 DEG C × 2h insulation, room temperature water is quenched, and shrend is less than 10s transfer time.
The preparation method of a kind of superhigh intensity non-rapid the most as claimed in claim 2 solidification aluminium alloy, is characterized in that: described Ageing Treatment, it is characterized in that its technique is T6 timeliness, ageing mechanism is 121 DEG C × 24h.
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| CN201610432186.7A CN105908029B (en) | 2016-06-16 | 2016-06-16 | A kind of superhigh intensity non-rapid solidification aluminium alloy and preparation method thereof |
| PCT/CN2016/094819 WO2017215104A1 (en) | 2016-06-16 | 2016-08-12 | Super-high strength non-rapidly solidified aluminum alloy and preparation method therefor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097646A (en) * | 2018-08-27 | 2018-12-28 | 江苏大学 | 780-820MPa ultrahigh-strength aluminum alloy and preparation method thereof |
| CN109457154A (en) * | 2019-01-07 | 2019-03-12 | 江苏豪然喷射成形合金有限公司 | A kind of heat treatment process of 7055 aluminium alloy |
| CN110592444A (en) * | 2019-08-27 | 2019-12-20 | 江苏大学 | 700-doped 720 MPa-strength heat-resistant high-intergranular corrosion-resistant aluminum alloy and preparation method thereof |
| CN111101032A (en) * | 2019-12-18 | 2020-05-05 | 山东南山铝业股份有限公司 | High-strength and high-plasticity extruded aluminum alloy and preparation method thereof |
| CN112322919A (en) * | 2020-11-12 | 2021-02-05 | 成都阳光铝制品有限公司 | Production process of aluminum alloy seamless pipe for aerospace |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112359235B (en) * | 2020-11-16 | 2021-12-14 | 四川阳光坚端铝业有限公司 | Production process of aluminum alloy airplane luggage rack profile |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109097646A (en) * | 2018-08-27 | 2018-12-28 | 江苏大学 | 780-820MPa ultrahigh-strength aluminum alloy and preparation method thereof |
| CN109457154A (en) * | 2019-01-07 | 2019-03-12 | 江苏豪然喷射成形合金有限公司 | A kind of heat treatment process of 7055 aluminium alloy |
| CN110592444A (en) * | 2019-08-27 | 2019-12-20 | 江苏大学 | 700-doped 720 MPa-strength heat-resistant high-intergranular corrosion-resistant aluminum alloy and preparation method thereof |
| CN111101032A (en) * | 2019-12-18 | 2020-05-05 | 山东南山铝业股份有限公司 | High-strength and high-plasticity extruded aluminum alloy and preparation method thereof |
| CN112322919A (en) * | 2020-11-12 | 2021-02-05 | 成都阳光铝制品有限公司 | Production process of aluminum alloy seamless pipe for aerospace |
| CN112322919B (en) * | 2020-11-12 | 2022-02-15 | 成都阳光铝制品有限公司 | Production process of aluminum alloy seamless pipe for aerospace |
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| WO2017215104A1 (en) | 2017-12-21 |
| CN105908029B (en) | 2017-12-05 |
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