CN104611617B - A kind of liquid forging Al-Cu-Zn aluminium alloy and preparation method thereof - Google Patents

A kind of liquid forging Al-Cu-Zn aluminium alloy and preparation method thereof Download PDF

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CN104611617B
CN104611617B CN201410670968.5A CN201410670968A CN104611617B CN 104611617 B CN104611617 B CN 104611617B CN 201410670968 A CN201410670968 A CN 201410670968A CN 104611617 B CN104611617 B CN 104611617B
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content
alloy
liquid forging
melt
refining
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CN104611617A (en
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高文林
陆政
王强
王建国
张显峰
孙刚
王少华
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Aviation Industry Corp of China AVIC
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Aviation Industry Corp of China AVIC
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/12Alloys based on aluminium with copper as the next major constituent
    • C22C21/18Alloys based on aluminium with copper as the next major constituent with zinc
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/026Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/03Making alloys by melting using master alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/06Making alloys with the use of special agents for refining or deoxidising

Abstract

The invention belongs to light-alloy design and preparation field, relate to the middle strength/tenacity aluminum alloy material of a kind of liquid forging, particularly relate to a kind of liquid forging Al Cu Zn aluminium alloy and preparation method thereof.nullThe key component of this alloy and mass percent be: Cu content 3.2 4.8%,Zn content 1.8 3.0%,Mn content 0.3 0.8%,Cd content 0.08 0.22%,Ti content 0.06 0.24%,V content 0.05 0.15%,Zr content 0.07 0.16%,B content 0.005 0.06%,Be content 0.002 0.006%,Impurity content Fe≤0.15%,Mg≤0.1%,Si≤0.06%,Single content≤0.05% of other impurity elements,Content of impurities≤0.3%,Al is balance-element,In Al Cu Zn system mentioned by the present invention, strength/tenacity aluminum alloy possesses excellent forming property in liquid forging forming process、Without hot cracking tendency、Low loose、Low segregation,The part utilizing this alloy to prepare after heat treatment possesses excellent intensity and plasticity,Possesses the superiority that other active service alloys are incomparable,Gather around and have broad application prospects.

Description

A kind of liquid forging Al-Cu-Zn aluminium alloy and preparation method thereof
Technical field
The invention belongs to light-alloy design and preparation field, relate to the middle strength/tenacity aluminum alloy material of a kind of liquid forging Material, particularly relates to a kind of liquid forging Al-Cu-Zn aluminium alloy and preparation method thereof.
Background technology
The development progress of Chinese large-sized transporter smoothly and will be assemblied in army, therefore to operation panzer in recent years Lightweight propose high request, bogie wheel wheel hub loss of weight is one of which important technology.For ensureing high production Efficiency and higher product quality, current bogie wheel wheel hub mainly uses liquid forging technology to prepare.Due to performance Requiring higher, therefore select Al-Cu system alloy, conventional alloy includes that LD5 wrought aluminium alloy casts with ZL205A Aluminium alloy, does not has the middle strength/tenacity aluminum alloy that liquid forging is special.
Both alloys there is problems in that in liquid forging forming technology (1) LD5 is deforming alloy, and Cu contains Amount is 1.8~2.6%, and Mg content is 0.4~0.8%, and in liquid forging forming process, hub interior exists loose With fire check, due to the existence of Mg element, easily it is involved in oxide during pressure solidification in melt, causes wheel Hub internal metallurgical quality is poor, and tensile strength is defective;(2) ZL205A is high strength cast aluminum alloys, Cu content 4.6~5.3%, but its crystallization range width, liquid forging forming process exists serious ardent tendency, loose With segregation phenomena.
Summary of the invention
It is an object of the invention to provide strength/tenacity aluminum alloy in the Al-Cu-Zn system of a kind of liquid forging, solve alloy Internal existence loosens and fire check, serious ardent tendency, loose and segregation problems.
The technical scheme is that its component and mass percent are Cu content 3.2-4.8%, Zn content 1.8-3.0%, Mn content 0.3-0.8%, Zr content 0.07-0.20%, Cd content 0.08-0.22%, Ti content 0.06-0.24%, V content 0.05-0.15%, B content 0.005-0.06%, Be content 0.002-0.006%, impurity Constituent content Fe≤0.15%, Mg≤0.1%, Si≤0.06%, surplus is Al, and wherein Cu, Zn are main alloying Element, Mn, Zr are main technique element, the ratio ≈ 4 of Mn/Zr, and Ti, B, V, Be, Cd are metallurgical matter Amount control element, in claimed range, Fe, Mg, Si are impurity element, it is desirable to control in allowed band.
Liquid forging includes following step by the preparation method of novel middle strength/tenacity aluminum alloy:
1) by the alloy composition described in claim 1 and percentage by weight requirement dispensing;
2) melting in crucible for smelting stove, smelting temperature is in the range of 690-800 DEG C;
3) refining the molten metal being completely melt, during refining, molten metal temperature maintains 700 DEG C~the model of 740 DEG C In enclosing, refining time 15-20min;
4) carrying out vacuum degassing process after refining, vacuum processing time is 20min;
5) after application of vacuum, melt stands 8-12min, then, is passed through argon shield melt in coffin, with Time use mechanical stirring device that melt is stirred 3-5min, mixing speed 200-300r/min, then use half Ingot casting is prepared in casting continuously, in casting process, is stirred once every 10min, stirs 3min every time, Until having cast, wherein cast temperature is 690-710 DEG C;
6) after ingot casting shaping, alloy of ingot composition is carried out chemical detection, except the chemical element of regulation in alloying component Outward, single content≤0.05% of other impurity elements, content of impurities≤0.3%, if exceeding regulation requirement, by ingot casting Melt down remelting and improve refining number of times again cast;
7) by after ingot casting remelting, utilize liquid forging technology to prepare alloy part, and carry out solid-solution and aging heat treatment.
Described alloy compositions and mass percent are Cu content 4.2%, Zn content 2.4%, Mn content 0.5%, Zr content 0.12%, Cd content 0.15%, Ti content 0.15%, V content 0.12%, B content 0.04%, Be Content 0.005%.
The present invention has the advantage that and provides the benefit that:
1) in order to reduce the segregation of Cu, alloy in the design process with Zn for Cu.Reduce the content of Cu, carry High Zn content, relies on the solution strengthening effect of Zn to make up Cu and reduces the intensity lost, thus ensure low segregation While possess again higher intensity.
2) combined reinforced by adding Mn/Zr, suppression material recrystallization tendency, add Cd, Ti, V, B simultaneously Deng element, make alloy realize structure refinement in process of setting as far as possible, improve alloy strength and toughness.
3) in melting with casting process, use mechanical device stirring, improve the distribution of Cu, Ti element in alloy melt Uniformity, to ensure the uniform of semicontinuous ingot casting head, middle part and Cu, Ti element everywhere such as afterbody and compound thereof Property, to improve being uniformly distributed of the overall performance everywhere of liquid forging part.
4) these alloy liquid die forging goods, its forming property is excellent, without hot cracking tendency, low loose, segregation, comprehensively Performance is significantly better than active service LD5 and ZL205A alloy.
5) this alloy parts goods of strong high-ductility be applicable to prepared by liquid forging, be particularly suited for preparing panzer, The bogie wheel wheel hubs such as female tank and heavy goods vehicle, performance is significantly excellent.
Detailed description of the invention
Strength/tenacity aluminum alloy in the Al-Cu-Zn system of a kind of liquid forging, each component and mass percent be: Cu Content 3.2-4.8%, Zn content 1.8-3.0%, Mn content 0.3-0.8%, Zr content 0.07-0.20%, Cd content 0.08-0.22%, Ti content 0.06-0.20%, V content 0.05-0.30%, B content 0.005-0.06%, Be content 0.002-0.006%, impurity content Fe≤0.15%, Mg≤0.1%, Si≤0.06%, surplus is Al.
The middle strength/tenacity aluminum alloy preparation technology of a kind of liquid forging is as follows:
1) by above-mentioned alloy composition and percentage by weight requirement dispensing, raw material include: pure Al, pure Zn, Al-Cu intermediate alloy, Al-Mn intermediate alloy, Al-Ti-B intermediate alloy, Al-V intermediate alloy, potassium fluorozirconate, Cd simple substance, Al-Be intermediate alloy etc..
2) in crucible for smelting stove, carry out melting, raw-material melting order be followed successively by pure Al, potassium fluorozirconate solvent, Close in the middle of Al-Cu intermediate alloy, pure Zn, Al-Mn intermediate alloy, Cd simple substance, Al-V intermediate alloy, Al-Be Gold, Al-Ti-B intermediate alloy, smelting temperature is in the range of 690-800 DEG C.
3) refining the molten metal being completely melt, during refining, molten metal temperature maintains 700 DEG C~the model of 740 DEG C In enclosing, refining time 15-20min.
4) carrying out vacuum degassing process after refining, vacuum processing time is 20min.
5) after application of vacuum, melt stands 10min, is passed through argon shield in crucible furnace, uses mechanical stirring device To Melt Stirring 4min, mixing speed 260r/min, then use the accurate ingot casting of semi-continuous casting preparation, every 10 Min is stirred once, stirs 3min every time, until having cast, in casting process, cast temperature is 690-710 DEG C, casting speed 50-220mm/min, cool down water intensity 0.015MPa.
6) ingot casting of preparation being carried out remelting, refining, liquid forging prepares part.
Embodiment:
Table 1 below gives novel middle strength/tenacity aluminum alloy chemical composition proposed by the invention and percentage by weight is implemented Example.
High tough aluminum alloy chemical composition and percentage by weight in table 1 new A l-Cu-Zn system
In embodiment 1,2,3,4, liquid forging alloy product performance after fixation rates is as shown in table 2.
Alloy product aging performance in table 2 embodiment 1,2,3,4
Embodiment Tensile strength Rm/MPa Yield strength Rp0.2/MPa Elongation percentage A/%
1 400 327 10
2 420 334 10.9
3 460 354 14
4 440 359 11.2
As can be seen from Table 1, wherein embodiment 1,3,4 meets single content≤0.05% of other impurity elements, miscellaneous The requirement of matter total content≤0.3%, embodiment 2 is unsatisfactory for requirement, and wherein the alloy in embodiment 2 is through chemical detection After, find impurity F e, Na content overproof, this composition alloy ingot casting is carried out remelting, on refined base before Increasing by twice refining and again cast, gained ingot casting chemical composition after inspection is up to standard, and impurity content controls In prescribed limit, wherein Fe content 1.2%, Na content 0.012%.Alloy performance after Overheating Treatment is shown in Table 2.
In sum, in of the present invention, strong high-ductility Al-Cu-Zn system alloy can be stablized under described preparation technology Obtain tensile strength more than 400MPa, the elongation percentage middle strength/tenacity aluminum alloy goods more than 10%, and formability Energy loose, low segregation excellent, low, produces high-performance components field in liquid forging and there is the biggest application potential.

Claims (3)

1. a liquid forging Al-Cu-Zn aluminium alloy, it is characterised in that: its component and mass percent are Cu Content 3.2-4.8%, Zn content 1.8-3.0%, Mn content 0.3-0.8%, Zr content 0.07-0.20%, Cd content 0.08-0.22%, Ti content 0.06-0.24%, V content 0.05-0.15%, B content 0.005-0.06%, Be content 0.002-0.006%, impurity content Fe≤0.15%, Mg≤0.1%, Si≤0.06%, surplus is Al, wherein Cu, Zn are main alloying elements, and Mn, Zr are main technique element, the ratio ≈ 4 of Mn/Zr, Ti, B, V, Be, Cd are metallurgical quality control element, and in claimed range, Fe, Mg, Si are impurity element, Requirement controls in allowed band.
A kind of liquid forging Al-Cu-Zn aluminium alloy the most according to claim 1, is characterized in that, described conjunction Gold component and mass percent are Cu content 4.2%, Zn content 2.4%, Mn content 0.5%, Zr content 0.12%, Cd content 0.15%, Ti content 0.15%, V content 0.12%, B content 0.04%, Be content 0.005%.
3. the method preparing liquid forging aluminium alloy described in claim 1, including following step:
1) by the alloy composition described in claim 1 and percentage by weight requirement dispensing;
2) melting in crucible for smelting stove, smelting temperature is in the range of 690-800 DEG C;
3) refining the molten metal being completely melt, during refining, molten metal temperature maintains 700 DEG C~the model of 740 DEG C In enclosing, refining time 15-20min;
4) carrying out vacuum degassing process after refining, vacuum processing time is 20min;
5) after application of vacuum, melt stands 8-12min, then, is passed through argon shield melt in coffin, with Time use mechanical stirring device to Melt Stirring 3-5min, mixing speed 200-300r/min, then use semicontinuous Ingot casting is prepared in casting, in casting process, every 10min to Melt Stirring once, stirs 3min, directly every time Completing to casting, wherein cast temperature is 690-710 DEG C;
6) after ingot casting shaping, alloy of ingot composition is carried out chemical detection, except the chemical element of regulation in alloying component Outward, single content≤0.05% of other impurity elements, content of impurities≤0.3%, if exceeding regulation requirement, by ingot casting Melt down remelting and improve refining number of times again cast;
7) by after ingot casting remelting, utilize liquid forging technology to prepare alloy part, and carry out solid-solution and aging heat treatment.
CN201410670968.5A 2014-11-20 2014-11-20 A kind of liquid forging Al-Cu-Zn aluminium alloy and preparation method thereof Active CN104611617B (en)

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WO2016192040A1 (en) * 2015-06-02 2016-12-08 GM Global Technology Operations LLC Aluminum alloy for forming an axisymmetric article
CN105369090B (en) * 2015-12-04 2017-08-08 西南铝业(集团)有限责任公司 A kind of preparation method of Zl205A alloy cast ingots
CN105525160B (en) * 2015-12-18 2018-08-17 百色学院 Aluminum alloy for automobile wheel hub ingot and preparation method thereof
CN105483472B (en) * 2015-12-18 2018-07-20 百色学院 A kind of casting hub aluminium alloy ingots and preparation method thereof
CN110257652A (en) * 2019-06-27 2019-09-20 北京京翰林模具制造有限公司 A kind of aluminium alloy casting automotive wheel, design method and manufacturing method

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JPH04263035A (en) * 1991-02-18 1992-09-18 Furukawa Alum Co Ltd High strength clad aluminum alloy material for low temperature brazing
CN100451148C (en) * 2005-03-07 2009-01-14 东北轻合金有限责任公司 Hub alloy made of aluminium alloy and its making method
CN101484604B (en) * 2006-07-07 2013-01-09 阿勒里斯铝业科布伦茨有限公司 Aa7000-series aluminium alloy products and a method of manufacturing thereof
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