CN103233150B - A kind of extrusion pressing type aluminium alloy - Google Patents
A kind of extrusion pressing type aluminium alloy Download PDFInfo
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- CN103233150B CN103233150B CN201310157580.0A CN201310157580A CN103233150B CN 103233150 B CN103233150 B CN 103233150B CN 201310157580 A CN201310157580 A CN 201310157580A CN 103233150 B CN103233150 B CN 103233150B
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Abstract
The invention provides a kind of extrusion pressing type aluminium alloy, belong to technical field of aluminium alloy preparation.Its component of aluminium alloy of the present invention comprises by percentage to the quality: Zn4.0 ~ 5.5%; Mg1.0 ~ 2.0%; Mn0.6 ~ 0.8%; Cu0.3 ~ 0.8%; Cr0.3 ~ 0.5%; Zr0.05 ~ 0.3%; Rare earth element 0.03-0.1%; Total content≤0.3% of inevitable impurity element; Surplus is aluminium.The room temperature tensile intensity of this aluminium alloy is 396.17-540.03Mpa, yield strength is 303.61-480.13Mpa; This aluminium alloy is after melting welding, and its tensile strength is 389.17-530.03Mpa, and yield strength is 292.61-460.13Mpa, and during welding, welding wire is consistent with the component of parent.The invention solves existing aluminium alloy and there is the problem that welding property and high strength be difficult to mate.The present invention is simple to operate, is convenient to realize suitability for industrialized production.
Description
Technical field
The present invention relates to a kind of aluminium alloy; In particular to a kind of extrusion pressing type aluminium alloy.
Background technology
Aluminium alloy is a most widely used class non-ferrous metal structured material in industry, widely applies in Aeronautics and Astronautics, automobile, machinofacture, boats and ships and chemical industry.Along with science and technology and the develop rapidly of industrial economy in recent years, increasing to the demand of Welded structural part, make the Research on Weldability of aluminium alloy also thereupon deeply.For a long time, aerospace field has very urgent demand to weldable aluminium, and often intensity is not high for traditional 7XXX system weldable aluminium, and intensity is all difficult to weld higher than the aluminium alloy of 500MPa.The component of alloy is the principal element affecting alloy welding property and intensity, 7A52 aluminium closes high strength weldable aluminium of being known as, its component is: Zn4.0-4.8wt%, Mg2.0-2.8wt%, Mn0.2-0.5wt%, Zr0.05-0.15wt%, Cr0.15-0.25wt%, Cu0.05-0.2wt%, Ti0.05-0.18wt%, surplus is Al, its room temperature tensile intensity is 380-502Mpa, yield strength is 245-451Mpa, but adopt the welding wire consistent with this alloy compositions, after argon arc welding, cooling, uniaxial direct tensile, its tensile strength also can only reach 358Mpa, yield strength is 238Mpa.
Summary of the invention
The object of the present invention is to provide a kind of possess simultaneously high strength and superior weldability can extrusion pressing type aluminium alloy, solve existing aluminium alloy and there is the problem that welding property and high strength be difficult to mate.
A kind of extrusion pressing type aluminium alloy of the present invention, its component is by percentage to the quality:
Zn4.0-5.5%; Mg1.0-2.5%; Mn0.6-0.8%; Cu0.3-0.8%; Cr0.3-0.5%; Zr0.05-0.3%; Rare earth element 0.03-0.1%; Total content≤0.3% of inevitable impurity element; Surplus is aluminium;
Described rare earth element is selected from least one in Sc, Er.
Aluminium alloy preferred ingredient of the present invention is by percentage to the quality:
Zn5.0%; Mg2.0%; Mn0.6%; Cu0.4%; Cr0.3%; Zr0.1%; Sc0.03%; Fe≤0.2%; Si≤0.1%; Surplus is aluminium.
The room temperature tensile intensity of aluminium alloy of the present invention is 396.17-540.03Mpa, and yield strength is 303.61-480.13Mpa; Described aluminium alloy is after melting welding, and room temperature tensile intensity is 389.17-530.03Mpa, and yield strength is 292.61-460.13Mpa; During welding, welding wire is consistent with the component of parent.
The preparation process of alloy of the present invention is: batching: join and get pure Al, pure Mg, pure Zn, pure Cu, Al-Mn master alloy, Al-Cr master alloy, Al-rare earth element master alloy, Al-Zr master alloy as raw material, described rare earth element is selected from least one in Sc, Er;
Under protective atmosphere, after above-mentioned raw materials being placed in smelting furnace melting, D.C.casting obtains ingot casting, after ingot casting cooling, under protective atmosphere, and Homogenization Treatments, extrusion molding obtains extrusion pressing type aluminium alloy;
Under protective atmosphere, gained extrusion pressing type aluminium alloy is obtained high-strength extrusion pressing type aluminium alloy after solution treatment, ageing treatment.
Principle of the present invention and beneficial effect are embodied in:
The present inventor is by making repeated attempts and a large amount of experiments, have adjusted the Cu in alloy, Mn, after the proportional amount of Cr, and simultaneously by adding trace rare-earth element Sc and/or Er, mechanical property and the welding property of unexpected discovery finished product of the present invention are all very excellent, the room temperature tensile intensity of its welding product is up to 530.03Mpa, yield strength is up to 460.13Mpa, the present invention adds and appropriate Cu because of trace rare-earth element Sc's and/or Er, Mn, Cr, Mg coordinates interpolation thus ensure that the mechanical property of aluminium alloy excellence, aluminium alloy of the present invention, the tensile strength of its room temperature has been up to 540.03Mpa, yield strength has been up to 480.13Mpa.
Accompanying drawing explanation
Accompanying drawing 1. is the XRD figure through different treatment system gained aluminium alloy in embodiment;
Accompanying drawing 2 is the photo of embodiment gained welding tension specimen;
Accompanying drawing 3 is the metallograph of embodiment gained welding tension specimen weld metal zone;
Accompanying drawing 4 is for embodiment gained welding tension specimen is through the SEM photo of solution treatment, ageing treatment back draft gained fracture.
As can be seen from Figure 1 the diffraction peak of cast alloy is mainly by α-Al matrix and MgZn
2the diffraction peak composition of phase; After 460 DEG C/24h Homogenization Treatments, MgZn
2diffraction peak weakens.
As can be seen from Figure 3: 1 region is the metallographic of weld metal zone, coarse grains; 2nd district are the fusion area of weld seam and base material, and crystal grain is very tiny; 3rd district are base material, and it is very good that weld seam and base material merge in welding process.
As can be seen from Figure 4: stretching fracture dimple is obvious, can prove that the tension fracture of alloy is almost ductile rupture.
Embodiment
Embodiment
Alloying constituent (by weight percentage) Zn5.0%, Mg2.0%, Mn0.6%, Cu0.4%, Cr0.3%, Zr0.1%, Sc0.03%, Fe≤0.2%, Si≤0.1%, surplus is Al, join by mentioned component and get pure Al, pure Mg, pure Zn, pure Cu, Al-10wt.%Mn, Al-5wt.%Cr, Al-2wt.%Sc and Al-5wt.%Zr as raw material, the wherein purity >=99.99wt.% of pure Al, pure Mg, pure Zn, pure Cu, in 10 tons of smelting furnaces, carry out alloy melting by joining the raw material got, obtain ingot casting after D.C.casting, during casting, in-furnace temperature is 728 DEG C, and fire door temperature is 709 DEG C, and strumbox temperature in is 701 DEG C, and dock door temperature is 681 DEG C, and platform end temperature is 663 DEG C, casting speed is 25-35mm/min, cooling water flow is 20-30m3/h, the water temperature of cooling water outlet is 22 DEG C, after ingot casting cooling, at 460 DEG C of Homogenization Treatments 24h under protective atmosphere, then extrusion molding, shaping style is divided into three parts, first part directly carries out stretching and detects, detected value is in table 1, second section carries out welding test, a part for welding style is directly carried out stretching and is detected, detected value is in table 1, another part style of welding style and the shaping style of Part III solution treatment 90min at 460 DEG C, carry out stretching after carrying out two-stage time effect process after cooling to detect, detected value is in table 1, the technique of two-stage time effect process is: one-level aging temp is 100 DEG C, aging time 8h, secondary time effect temperature is 140 DEG C, and aging time is 10h, during welding, welding wire is consistent with the component of parent, and the method for welding is melting welding.
Comparative example:
Adopt 7A52 weldable aluminium, its component is by percentage to the quality: Zn4.8%, Mg2.0%, Mn0.5%, Zr0.1%, Cr0.25%, Cu0.2%, Ti0.18, Fe<0.2%, Si<0.1%, and surplus is Al.Its melting, D.C.casting, extrusion molding processing parameter used and embodiment just the same, after extrusion molding, shaping style is divided into three parts, first part directly carries out stretching and detects, detected value is in table 1, second section carries out welding test, a part for welding style is directly carried out stretching and is detected, detected value is in table 1, another part style of welding style and the shaping style of Part III solution treatment 90min at 460 DEG C, carry out stretching after carrying out two-stage time effect process after cooling to detect, detected value is in table 1, solution treatment, solution treatment in the condition of ageing treatment and embodiment, the condition of ageing treatment is completely the same, during welding, welding wire is consistent with the component of traditional 7A52 weldable aluminium, and other welding conditionss are consistent with the welding conditions in embodiment.
Table 1. aluminium alloy capability detects table
In table: No. 1 style is the aluminium alloy extruded stance sample of 7A52, No. 2 styles are the As-extruded style of alloy of the present invention, No. 3 styles are the As-extruded welded plate of 7A52 aluminium alloy, No. 4 styles are the As-extruded welded plate of alloy of the present invention, No. 5 styles are that 7A52 aluminium alloy is through extruding, solid solution, gained style after ageing treatment, No. 6 styles are that alloy of the present invention is through extruding, solid solution, gained style after ageing treatment, No. 7 styles are that 7A52 aluminium alloy is through extruding, welding, solid solution, gained style after ageing treatment, No. 8 styles are that alloy of the present invention is through extruding, welding, solid solution, gained style after ageing treatment.
In conjunction with the embodiments with comparative example and table 1, can find out:
1. alloy of the present invention and 7A52 alloy are after identical treatment process process, and the mechanical property of alloy of the present invention is all superior than the mechanical property of 7A52 alloy; Be in particular in: As-extruded, the tensile strength of alloy of the present invention is than the tensile strength height 12.57MPa of 7A52 alloy, the yield strength height 55.62MPa of the yield strength ratio 7A52 alloy of alloy of the present invention; After solid solution, ageing treatment, the tensile strength of alloy of the present invention is than the tensile strength height 38.96Mpa of 7A52 alloy, the yield strength height 29.68Mpa of the yield strength ratio 7A52 alloy of alloy of the present invention;
2. the welding product of alloy of the present invention and the welding product of 7A52 alloy are after identical treatment process process, and the mechanical property of alloy welding product of the present invention is all superior than the mechanical property of 7A52 alloy welding product; Be in particular in: As-extruded, the tensile strength of alloy welding product of the present invention exceeds 20MPa than the tensile strength of 7A52 alloy welding product, and the yield strength of the yield strength ratio 7A52 alloy welding product of alloy welding product of the present invention exceeds about 60MPa; After solid solution, ageing treatment, the tensile strength of alloy welding product of the present invention exceeds about 50Mpa than the tensile strength of 7A52 alloy welding product, and the yield strength of the yield strength ratio 7A52 alloy welding product of alloy welding product of the present invention exceeds about 40Mpa.
In sum: compare and 7A52 alloy, the present invention makes aluminium alloy provided by the present invention have excellent mechanical property and welding property due to the change of alloy compositions, achieves high strength and mates with the better of weldability.
Claims (3)
1. an extrusion pressing type aluminium alloy, its composition is by percentage to the quality:
Zn 4.0-5.5％；
Mg1.0-2.5％；
Mn0.6-0.8％；
Cu0.3-0.8％；
Cr 0.3-0.5％；
Zr 0.05-0.3％；
Rare earth element 0.03-0.1%;
Total content≤0.3% of inevitable impurity element;
Surplus is aluminium;
Described rare earth element is selected from least one in Sc, Er;
Described aluminium alloy is after melting welding, and room temperature tensile intensity is 389.17-530.03MPa, and yield strength is 292.61-460.13MPa; During welding, welding wire is consistent with the component of parent.
2. aluminium alloy according to claim 1, is characterized in that: the component of aluminium alloy is by percentage to the quality: Zn 5.0%; Mg2.0%; Mn 0.6%; Cu 0.4%; Cr 0.3%; Zr 0.1%; Sc0.03%; Fe≤0.2%; Si≤0.1%; Surplus is aluminium.
3. aluminium alloy according to claim 1 and 2, is characterized in that: the room temperature tensile intensity of aluminium alloy is 396.17-540.03MPa, and yield strength is 303.61-480.13MPa.
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| CN104018041B (en) * | 2014-06-26 | 2016-08-24 | 龙口市丛林铝材有限公司 | A kind of high ferro car body aluminium section bar and preparation method thereof |
| CN109207821A (en) * | 2018-11-21 | 2019-01-15 | 贵州正合博莱金属制品有限公司 | A kind of aluminum alloy materials |
| CN113403511B (en) * | 2021-05-27 | 2023-04-07 | 江苏大学 | High-strength and high-toughness weldable in-situ nano reinforced rare earth aluminum alloy and preparation method thereof |
| CN114672708A (en) * | 2022-03-11 | 2022-06-28 | 山东南山铝业股份有限公司 | High-strength heat-deformation-resistant rare earth aluminum alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2293783C1 (en) * | 2005-08-30 | 2007-02-20 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") | Aluminum-based alloy and an article made therefrom |
| CN101353744A (en) * | 2007-07-26 | 2009-01-28 | 中南大学 | Stress corrosion resistant Al-Zn-Mg-(Cu) alloy and preparation thereof |
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| US8673209B2 (en) * | 2007-05-14 | 2014-03-18 | Alcoa Inc. | Aluminum alloy products having improved property combinations and method for artificially aging same |
| JP2011058047A (en) * | 2009-09-10 | 2011-03-24 | Furukawa-Sky Aluminum Corp | Method for producing aluminum alloy thick plate having excellent strength and ductility |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2293783C1 (en) * | 2005-08-30 | 2007-02-20 | Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") | Aluminum-based alloy and an article made therefrom |
| CN101353744A (en) * | 2007-07-26 | 2009-01-28 | 中南大学 | Stress corrosion resistant Al-Zn-Mg-(Cu) alloy and preparation thereof |
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Effective date of registration: 20210112 Address after: 310000 he Shang Zhen Zi Dong Cun, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: ZHEJIANG JIALUMINIUM NEW MATERIALS Co.,Ltd. Address before: No. 154, Yuelu Mountain, Yuelu District, Changsha City, Hunan Province Patentee before: CENTRAL SOUTH University |
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Effective date of registration: 20210120 Address after: 310000 he Shang Zhen Zi Dong Cun, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: ZHEJIANG JIALUMINIUM NEW MATERIALS Co.,Ltd. Address before: No. 154, Yuelu Mountain, Yuelu District, Changsha City, Hunan Province Patentee before: CENTRAL SOUTH University |
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Denomination of invention: An extruded aluminum alloy Effective date of registration: 20221024 Granted publication date: 20150826 Pledgee: China Minsheng Banking Corp Hangzhou branch Pledgor: ZHEJIANG JIALUMINIUM NEW MATERIALS Co.,Ltd. Registration number: Y2022980019515 |