CN102796924B - Method for producing 180 aluminium alloy sections - Google Patents

Method for producing 180 aluminium alloy sections Download PDF

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Publication number
CN102796924B
CN102796924B CN201210334086.2A CN201210334086A CN102796924B CN 102796924 B CN102796924 B CN 102796924B CN 201210334086 A CN201210334086 A CN 201210334086A CN 102796924 B CN102796924 B CN 102796924B
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China
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aluminium alloy
aluminium
manufacture
alloy extrusions
extrusions
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CN201210334086.2A
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Chinese (zh)
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CN102796924A (en
Inventor
张燕飞
刘科研
刘记伟
王国军
高新宇
潘哲
马琳
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东北轻合金有限责任公司
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Abstract

A method for producing 180 aluminium alloy sections relates to a method for producing aluminium alloy sections. The method is used for solving the technical problems that the aluminium alloy section which is produced by the prior art has unstable alloy ingot casting strength, low shear strength, weak tensile strength, low elongation percentage, bad corrosion resistance and bad plasticity. The method for producing 180 aluminium alloy sections comprises the following steps of: 1, weighing raw materials; 2, preparing aluminium alloy melt; 3, producing an aluminium alloy round ingot; 4, homogenizing annealing; 5, producing the aluminium alloy section through extrusion forming; and 6, producing the 180 aluminium alloy section. The 180 aluminium alloy section which is produced by the method has the tensile strength of 310-380 MPa, the shear strength of 200-236MPa and the elongation percentage of 16.0-20.0A, and can be applied in the ship field as the ideal material of ship structures, warship radars and the like.

Description

A kind of manufacture method of 180 aluminium alloy extrusions
Technical field
The present invention relates to the manufacture method of aluminium alloy extrusions.
Background technology
Al-Mg line aluminium alloy is non-thermal treatment intensified type aluminium alloy, has a lot of shortcomings: due to magnesium, be 1, the chief component element of alloy, ingot crack is large, easily form oxide compound, the easy scaling loss of Mg during founding, alloying constituent proportioning is difficult to be controlled, and causes alloy cast ingot intensity unstable; 2, due to a precipitation forming core difficulty, core is few, and a precipitation size is large, timeliness weak effect, thereby alloy yield strength is low, is only 160~200Mpa conventionally, and low cross-intensity, is only 310Mpa conventionally, unit elongation is low, is only 16.0A; 3, magnesium is preferentially anode item Mg 5al 8or Mg 5al 3at grain boundary precipitate, thereby make alloy have the tendency that produces intergranular crack and stress corrosion, antiseptic property is poor; 4, foreign matter content is large, and plasticity is poor.
180 aluminium alloys are to be on non-thermal treatment intensified type aluminium alloy basis at Al-Mg, add appropriate Mn, Cr, Ti and Be element strict a kind of new alloy of controlling Fe+Si foreign matter content and developing.This alloy has medium room temperature strength, and the Comprehensive Characteristics such as good sea water corrosion resistant and welding property, are mainly used in ship domain, is the ideal material of manufacturing hull structure and warship radar etc., and marine ships army industrial expansion is had to promoter action.
Summary of the invention
The present invention be to solve that the alloy cast ingot intensity that aluminium alloy extrusions prepared by existing method exists is unstable, yield strength is low, low cross-intensity, unit elongation is low, antiseptic property is poor and plasticity is poor technical problem, thereby a kind of manufacture method of 180 aluminium alloy extrusions is provided.
The manufacture method of a kind of 180 aluminium alloy extrusions of the present invention is carried out according to the following steps:
One, by each element mass percent, be Mg:4.70%~5.50%, Mn:0.50%~1.00%, Cr:0.05%~0.20%, Ti:0.03~0.15%, Be:0.0001%~0.0015%, Zn :≤0.25%, Cu :≤0.10%, Fe+Si :≤0.40%, single impurity :≤0.05%, add up to impurity :≤0.15% and the Al of surplus, take respectively fine aluminium ingot, magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, Al-Ti-B intermediate alloy and aluminium beryllium master alloy;
Two, metal step 1 being taken joins in smelting furnace and carries out melting, and smelting temperature is 700~750 ℃, and smelting time is 3~5h, obtains molten aluminium alloy;
Three, by resulting molten aluminium alloy in step 2, in casting temp, be to cast under 715 ℃~730 ℃, the casting speed condition that is 20~85mm/min, obtain aluminium alloy round cast ingot;
Four, the aluminium alloy round cast ingot obtaining in step 3 is cooling, prescind after, be placed in annealing furnace and be heated to 460~480 ℃, and be incubated 24h, the air cooling of coming out of the stove, carries out homogenizing annealing;
Five, the aluminium alloy round cast ingot of process homogenizing annealing in step 4 is placed in air-heating furnace and is heated, Heating temperature is incubated 3h after reaching 400~450 ℃, then by the tool and mould hot extrusion molding of preheating in advance, obtains the aluminium alloy extrusions of hot extrusion molding;
Six, the aluminium alloy extrusions of the hot extrusion molding of step 5 is rectified and manually aligned by tension straightening, crop end, roller, obtain 180 aluminium alloy extrusions.
The present invention includes following effect:
1,180 alloys that prepared by the present invention are to be on non-thermal treatment intensified type aluminium alloy basis at Al-Mg, add appropriate Mn, Cr, Ti and Be element strict a kind of alloy of controlling Fe+Si foreign matter content and developing;
2,180 alloys that prepared by the present invention add Mn, can make magnesium precipitate item even, put forward heavy alloyed corrosion stability, the ability of stress corrosion dehiscence resistant particularly, the effect that not only improves alloy strength is larger than magnesium, and can guarantee that alloy has higher stability, to every increase 1%Mg in aluminium, can make intensity improve about 35MPa, add the manganese with amount can make intensity improve approximately 65~70MPa, effect is almost twice; Put forward heavy alloyed recrystallization temperature, stop grain coarsening; Manganese content reduces in the solubleness that can make Mg below 1% in matrix, reduces crack tendence;
3, in 180 alloys that prepared by the present invention, the effect of Cr and Mn's is similar, improve stress corrosion dehiscence resistant ability, improve matrix metal and weldquality, reduce welding crack tendency, but its content is no more than 0.35%, with regard to strengthening effect, Cr is not as Mn, if two elements add simultaneously, its effect is than single add large;
4, in 180 alloys that prepared by the present invention, add Be, can reduce the crackle tendency of ingot casting, reduce the scaling loss of magnesium simultaneously, and can also reduce the oxide compound that material surface forms in heat-processed;
5, in 180 alloys that prepared by the present invention, adding a small amount of Ti, is mainly crystal grain thinning;
6, the Fe+Si foreign matter content adding in 180 alloys that prepared by the present invention is less than 0.4%, can strengthen the plasticity of alloy.
The over-all properties of 180 alloys that 7, prepared by the present invention: tensile strength is 310~380MPa, yield strength is 200~236MPa, unit elongation is 16.0~20.0A.
Embodiment
Embodiment one: in present embodiment, a kind of manufacture method of 180 aluminium alloy extrusions is carried out according to the following steps:
One, by each element mass percent, be Mg:4.70%~5.50%, Mn:0.50%~1.00%, Cr:0.05%~0.20%, Ti:0.03~0.15%, Be:0.0001%~0.0015%, Zn :≤0.25%, Cu :≤0.10%, Fe+Si :≤0.40%, single impurity :≤0.05%, add up to impurity :≤0.15% and the Al of surplus, take respectively fine aluminium ingot, magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, Al-Ti-B intermediate alloy and aluminium beryllium master alloy;
Two, metal step 1 being taken joins in smelting furnace and carries out melting, and smelting temperature is 700~750 ℃, and smelting time is 3~5h, obtains molten aluminium alloy;
Three, by resulting molten aluminium alloy in step 2, in casting temp, be to cast under 715 ℃~730 ℃, the casting speed condition that is 20~85mm/min, obtain aluminium alloy round cast ingot;
Four, the aluminium alloy round cast ingot obtaining in step 3 is cooling, prescind after, be placed in annealing furnace and be heated to 460~480 ℃, and be incubated 24h, the air cooling of coming out of the stove, carries out homogenizing annealing;
Five, the aluminium alloy round cast ingot of process homogenizing annealing in step 4 is placed in air-heating furnace and is heated, Heating temperature is incubated 3h after reaching 400~450 ℃, then by the tool and mould hot extrusion molding of preheating in advance, obtains the aluminium alloy extrusions of hot extrusion molding;
Six, the aluminium alloy extrusions of the hot extrusion molding of step 5 is rectified and manually aligned by tension straightening, crop end, roller, obtain 180 aluminium alloy extrusions.
Present embodiment comprises following effect:
1,180 alloys that prepared by present embodiment are to be on non-thermal treatment intensified type aluminium alloy basis at Al-Mg, add appropriate Mn, Cr, Ti and Be element strict a kind of new alloy of controlling Fe+Si foreign matter content and developing;
2,180 alloys that prepared by present embodiment add Mn, can make magnesium precipitate item even, put forward heavy alloyed corrosion stability, the ability of stress corrosion dehiscence resistant particularly, the effect that not only improves alloy strength is larger than magnesium, and can guarantee that alloy has higher stability, to every increase 1%Mg in aluminium, can make intensity improve about 35MPa, add the manganese with amount can make intensity improve approximately 65~70Mpa, effect is almost twice; Put forward heavy alloyed recrystallization temperature, stop grain coarsening; Manganese content reduces in the solubleness that can make Mg below 1% in matrix, reduces crack tendence;
3, in 180 alloys that prepared by present embodiment, the effect of Cr and Mn's is similar, improve stress corrosion dehiscence resistant ability, improve matrix metal and weldquality, reduce welding crack tendency, but its content is no more than 0.35%, with regard to strengthening effect, Cr is not as Mn, if two elements add simultaneously, its effect is than single add large;
4, in 180 alloys that prepared by present embodiment, add Be, can reduce the crackle tendency of ingot casting, reduce the scaling loss of magnesium simultaneously, and can also reduce the oxide compound that material surface forms in heat-processed;
5, in 180 alloys that prepared by present embodiment, adding a small amount of Ti, is mainly crystal grain thinning;
6, the Fe+Si foreign matter content adding in 180 alloys that prepared by present embodiment is less than 0.4%, can strengthen the plasticity of alloy.
The over-all properties of 180 alloys that 7, prepared by present embodiment: tensile strength is 310~380Mpa, yield strength is 200~236Mpa, unit elongation is 16.0~20.0A.
Embodiment two: present embodiment is different from embodiment one: in step 2, smelting temperature is 750 ℃, smelting time is 5h.Other is identical with embodiment one.
Embodiment three: present embodiment is different from embodiment one or two: in step 3, the casting temp of aluminium alloy round cast ingot is 720 ℃, casting speed is 30~50mm/min.Other is identical with embodiment one or two.
Embodiment four: present embodiment is different from one of embodiment one to three: aluminium alloy round cast ingot is placed in annealing furnace and is heated to 465~475 ℃ in step 4.Other is identical with one of embodiment one to three.
Embodiment five: present embodiment is different from one of embodiment one to four: in step 5, the Heating temperature of aluminium alloy round cast ingot reaches 420~440 ℃.Other is identical with one of embodiment one to four.
Embodiment six: present embodiment is different from one of embodiment one to five: in step 5, tool and mould preheating temperature is 450~500 ℃, insulation 2h.Other is identical with one of embodiment one to five.
Embodiment seven: present embodiment is different from one of embodiment one to six: in step 6, in aluminium alloy round cast ingot finishing, the extensibility of tension straightening is 2~3%, other is identical with one of embodiment one to six.
By following verification experimental verification beneficial effect of the present invention:
Test one: the manufacture method of a kind of 180 aluminium alloy extrusions of this test is to realize by the following method:
One, in each element mass percent in 180 aluminium alloy extrusions, be Mg:5.00%, Mn:0.9%, Cr:0.10%, Ti:0.10%, Be:0.0008%, Zn:0.20%, Cu:0.10%, Fe+Si:0.35%, single impurity: 0.04%, add up to impurity: 0.13% and the Al of surplus ratio, take respectively fine aluminium ingot, magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, Al-Ti-B intermediate alloy, aluminium beryllium master alloy, high magnesium alloy one-level waste material;
Two, metal step 1 being taken joins in smelting furnace and carries out melting, and melting 5h at 750 ℃ of temperature, obtains molten aluminium alloy;
Three, by resulting aluminium alloy solution in step 2, in casting temp, be to cast under 720 ℃, the casting speed condition that is 45mm/min, obtain aluminium alloy round cast ingot;
Four, the aluminium alloy round cast ingot obtaining in step 3 is cooling, prescind after, be placed in annealing furnace and be heated to 470 ℃, and be incubated 24h, the air cooling of coming out of the stove, carries out homogenizing annealing;
Five, the aluminium alloy round cast ingot of process homogenizing annealing in step 4 is placed in air-heating furnace and is heated, Heating temperature is incubated 3h after reaching 440 ℃, by shift to an earlier date the tool and mould hot extrusion molding of preheating 2h at 450 ℃ of temperature, obtain the aluminium alloy extrusions of hot extrusion molding again;
Six, the tension straightening that is 2~3% by the aluminium alloy extrusions of the hot extrusion molding of step 5 by extensibility, crop end, roller are rectified and hand is rectified technique finishing, obtain 180 aluminium alloy extrusions.
The tensile strength of 180 aluminium alloy extrusions of this test preparation is 325R m,, yield strength is 220R p0.2, unit elongation is 18A;
180 aluminium alloy extrusions of this test preparation add Mn, can make magnesium precipitate item even, put forward the ability of heavy alloyed corrosion stability, particularly stress corrosion dehiscence resistant, and the effect that not only improves alloy strength is larger than magnesium, and can guarantee that alloy has higher stability;
The Fe+Si foreign matter content adding in 180 aluminium alloy extrusions of this test preparation is less than 0.4%, can strengthen the plasticity of alloy.
Test two: the manufacture method of a kind of 180 aluminium alloy extrusions of this test is to realize by the following method:
One, in each element mass percent in 180 aluminium alloy extrusions, be Mg:5.10%, Mn:0.91%, Cr:0.12%, Ti:0.072%, Be:0.0006%, Zn:0.15%, Cu:0.05%, Fe+Si:0.23%, single impurity: 0.03%, add up to impurity: 0.12% and the Al of surplus ratio, take respectively fine aluminium ingot, magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, Al-Ti-B intermediate alloy, aluminium beryllium master alloy, high magnesium alloy one-level waste material;
Two, metal step 1 being taken joins in smelting furnace and carries out melting, and melting 5h at 750 ℃ of temperature, obtains molten aluminium alloy;
Three, by resulting aluminium alloy solution in step 2, in casting temp, be to cast under 720 ℃, the casting speed condition that is 50mm/min, obtain aluminium alloy round cast ingot;
Four, the aluminium alloy round cast ingot obtaining in step 3 is cooling, prescind after, be placed in annealing furnace and be heated to 470 ℃, and be incubated 24h, the air cooling of coming out of the stove, carries out homogenizing annealing;
Five, the aluminium alloy round cast ingot of process homogenizing annealing in step 4 is placed in air-heating furnace and is heated, Heating temperature is incubated 3h after reaching 440 ℃, by shift to an earlier date the tool and mould hot extrusion molding of preheating 2h at 450 ℃ of temperature, obtain the aluminium alloy extrusions of hot extrusion molding again;
Six, the tension straightening that is 2~3% by the aluminium alloy extrusions of the hot extrusion molding of step 5 by extensibility, crop end, roller are rectified and hand is rectified technique finishing, obtain 180 aluminium alloy extrusions.
The tensile strength of 180 aluminium alloy extrusions of this test preparation is 360R m,, yield strength is 225R p0.2, unit elongation is 19A;
180 aluminium alloy extrusions of this test preparation add Mn, can make magnesium precipitate item even, put forward the ability of heavy alloyed corrosion stability, particularly stress corrosion dehiscence resistant, and the effect that not only improves alloy strength is larger than magnesium, and can guarantee that alloy has higher stability;
The Fe+Si foreign matter content adding in 180 aluminium alloy extrusions of this test preparation is less than 0.4%, can strengthen the plasticity of alloy.

Claims (7)

1. a manufacture method for 180 aluminium alloy extrusions, is characterized in that the manufacture method of 180 aluminium alloy extrusions is carried out according to the following steps:
One, by each element mass percent, be Mg:4.70%~5.50%, Mn:0.50%~1.00%, Cr:0.05%~0.20%, Ti:0.03~0.15%, Be:0.0001%~0.0015%, Zn :≤0.25%, Cu :≤0.10%, Fe+Si :≤0.40%, single impurity :≤0.05%, add up to impurity :≤0.15% and the Al of surplus, take respectively fine aluminium ingot, magnesium ingot, aluminium manganese master alloy, aluminium chromium hardener, Al-Ti-B intermediate alloy and aluminium beryllium master alloy;
Two, metal step 1 being taken joins in smelting furnace and carries out melting, and smelting temperature is 700~750 ℃, and smelting time is 3~5h, obtains molten aluminium alloy;
Three, by resulting molten aluminium alloy in step 2, in casting temp, be to cast under 715 ℃~730 ℃, the casting speed condition that is 20~85mm/min, obtain aluminium alloy round cast ingot;
Four, the aluminium alloy round cast ingot obtaining in step 3 is cooling, prescind after, be placed in annealing furnace and be heated to 460~480 ℃, and be incubated 24h, the air cooling of coming out of the stove, carries out homogenizing annealing;
Five, the aluminium alloy round cast ingot of process homogenizing annealing in step 4 is placed in air-heating furnace and is heated, Heating temperature is incubated 3h after reaching 400~450 ℃, then by the tool and mould hot extrusion molding of preheating in advance, obtains the aluminium alloy extrusions of hot extrusion molding;
Six, the aluminium alloy extrusions of the hot extrusion molding of step 5 is rectified and manually aligned by tension straightening, crop end, roller, obtain 180 aluminium alloy extrusions.
2. the manufacture method of a kind of 180 aluminium alloy extrusions according to claim 1, is characterized in that in step 2, smelting temperature is 750 ℃, and smelting time is 5h.
3. the manufacture method of a kind of 180 aluminium alloy extrusions according to claim 1, the casting temp that it is characterized in that aluminium alloy round cast ingot in step 3 is 720 ℃, casting speed is 30~50mm/min.
4. the manufacture method of a kind of 180 aluminium alloy extrusions according to claim 1, is characterized in that aluminium alloy round cast ingot being placed in annealing furnace and being heated to 465~475 ℃ in step 4.
5. the manufacture method of a kind of 180 aluminium alloy extrusions according to claim 1, is characterized in that in step 5, the Heating temperature of aluminium alloy round cast ingot reaches 420~440 ℃.
6. the manufacture method of a kind of 180 aluminium alloy extrusions according to claim 1, is characterized in that in step 5, tool and mould preheating temperature is 450~500 ℃, insulation 2h.
7. the manufacture method of a kind of 180 aluminium alloy extrusions according to claim 1, is characterized in that in step 6 in aluminium alloy round cast ingot finishing that the extensibility of tension straightening is 2~3%.
CN201210334086.2A 2012-09-11 2012-09-11 Method for producing 180 aluminium alloy sections CN102796924B (en)

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CN103014450B (en) * 2012-12-03 2014-11-26 滁州迪蒙德模具制造有限公司 Processing technology for high-performance aluminium alloy foaming mould casting
CN104451283B (en) * 2014-12-12 2017-01-04 西南铝业(集团)有限责任公司 A kind of production method of 5A06 aluminium alloy cast ingot
CN105088028A (en) * 2015-10-14 2015-11-25 肖鹏 Aluminium magnesium alloy
CN106756275A (en) * 2016-12-19 2017-05-31 镇江创智特种合金科技发展有限公司 A kind of reinforced aluminium based composites
CN106702228A (en) * 2017-01-23 2017-05-24 沈阳工业大学 Extrusion casting forming hypereutectic Al-Si alloy and preparation method thereof
CN107739918A (en) * 2017-10-18 2018-02-27 东北轻合金有限责任公司 A kind of aluminium alloy of tank body containing erbium and its manufacturing method of plate thereof
CN108707791B (en) * 2018-05-11 2020-03-13 广西南南铝加工有限公司 Preparation method of oversized high-Mg aluminum alloy round ingot
CN110592435A (en) * 2019-11-01 2019-12-20 安徽鑫铂铝业股份有限公司 Lightweight aluminum alloy profile
CN111187951A (en) * 2019-12-20 2020-05-22 西南铝业(集团)有限责任公司 Aluminum-magnesium-scandium-zirconium-titanium alloy and preparation method thereof
CN111020313A (en) * 2019-12-26 2020-04-17 营口忠旺铝业有限公司 Production process of 5-series aluminum alloy section

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JP2831157B2 (en) * 1991-04-17 1998-12-02 株式会社神戸製鋼所 Al-Mg based superplastic aluminum alloy sheet excellent in strength and corrosion resistance and method for producing the same
JPH08283923A (en) * 1995-04-13 1996-10-29 Shinko Alcoa Yuso Kizai Kk Production of aluminum-magnesium alloy material having high corrosion resistance and high strength
CN1286595C (en) * 2005-05-20 2006-11-29 东北轻合金有限责任公司 Method for manufacturing cone shaped open die forgings made rom aluminium alloy
CN101880802B (en) * 2010-07-30 2013-06-19 浙江巨科铝业有限公司 Al-Mg high magnesium alloys for automobile body sheets and manufacturing method thereof

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