CN104404318A - Rare earth strengthening aluminum alloy sheet for air conditioner radiator and preparation method of rare earth strengthening aluminum alloy sheet - Google Patents

Rare earth strengthening aluminum alloy sheet for air conditioner radiator and preparation method of rare earth strengthening aluminum alloy sheet Download PDF

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Publication number
CN104404318A
CN104404318A CN201410684180.XA CN201410684180A CN104404318A CN 104404318 A CN104404318 A CN 104404318A CN 201410684180 A CN201410684180 A CN 201410684180A CN 104404318 A CN104404318 A CN 104404318A
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CN
China
Prior art keywords
aluminum alloy
rare earth
alloy sheet
temperature
air conditioner
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Application number
CN201410684180.XA
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Chinese (zh)
Inventor
骆宣佐
Original Assignee
安徽天祥空调科技有限公司
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Priority to CN201410684180.XA priority Critical patent/CN104404318A/en
Publication of CN104404318A publication Critical patent/CN104404318A/en

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Classifications

    • 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
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/06Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08Alloys based on aluminium with magnesium as the next major constituent with silicon
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/047Changing 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 magnesium as the next major constituent
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081Heat exchange elements made from metals or metal alloys
    • F28F21/084Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys

Abstract

The invention relates to a rare earth strengthening aluminum alloy sheet for an air conditioner radiator and a preparation method of the rare earth strengthening aluminum alloy sheet. The aluminum alloy sheet comprises the following chemical element compositions in percentage by weight: 0.45-0.75 of Si (silicon), 0.02-0.04 of La (lanthanum), 0.01-0.03 of Ce (cerium), 0.01-0.03 of Pr (praseodymium), 0.01-0.03 of Nd (neodymium), 0.24-0.49 of Ni (nickel), 2.03-2.69 of Mg (magnesium) and the balance of Al (aluminium). The aluminum alloy sheet disclosed by the invention uses magnesium and rare-earth elements, so that the strength of alloy is greatly strengthened, crystal grains are refined, gases and inclusions are reduced, and the aging temperature is low. The production method disclosed by the invention reduces the layering, peeling, bubbling and cracking probabilities of the aluminum alloy, and the rate of finished products is increased. The refining agent of the aluminum alloy sheet has a good refining effect, and the probabilities of air holes and slag inclusion are obviously reduced.

Description

A kind of rare earth reinforced air conditioner heat radiator aluminum alloy sheet and preparation method thereof
Technical field
The present invention relates to aluminium alloy heat sink material field, particularly relate to a kind of rare earth reinforced air conditioner heat radiator aluminum alloy sheet and preparation method thereof.
Background technology
Air conditioner heat radiator is the key part of air-conditioning, is related to working efficiency and the work-ing life of air-conditioning.And along with domestic air conditioning miniaturization and the requirement reducing manufacturing cost, the thickness of air-conditioner foil fin is more and more thinner, towards future development that is thinning, that become hard, high-precision, requires new alloy, new processing technology and new quality height.The requirement on machining accuracy of air-conditioner foil fin is high, requires that aluminium foil has good plasticity and higher intensity.Mainly there is bad mechanical property in current air conditioner heat radiator aluminium foil, as tensile strength (140Rm/MPa), yield strength (100R 0.2/ MPa), hardness (9-12 degree) is more weak, poor electric conductivity, poor thermal conductivity, the shortcomings such as poor plasticity.
Often there are the quality problems of stratification, peeling, bubble, crackle in aluminum alloy heat sink, depends on the complete processings such as founding, extrusion temperature, extrusion speed, therefore needs the production technique improving radiator element, improve the performance of radiator element.
Summary of the invention
The object of the present invention is to provide a kind of rare earth reinforced air conditioner heat radiator aluminum alloy sheet and preparation method thereof, the intensity of this aluminium alloy is high, grain refining, gas and to be mingled with phenomenon few, and aging temp is low.
Technical scheme of the present invention is as follows:
A kind of rare earth reinforced air conditioner heat radiator aluminum alloy sheet, is characterized in that: the chemical element composition that it contains and mass percent thereof are: Si0.45-0.75, La0.02-0.04, Ce0.01-0.03, Pr0.01-0.03, Nd 0.01-0.03, Ni0.24-0.49, Mg2.03-2.69, remaining as Al.
The production method of described rare earth reinforced air conditioner heat radiator aluminum alloy sheet, is characterized in that:
(1) prepare burden, melting, temperature is 740-755 DEG C, smelting time 3.5-4 hour;
(2) refining, temperature is 740-755 DEG C, and refining agent consumption is 1.6% of aluminum alloy melt weight, and refining time is 26-30 minute, leaves standstill 15-20 minute;
(3) cast, adopt 50 height of eye temperature ceramic filter plate aluminum filtration liquid, then cast, temperature of aluminum liquid is 700-710 DEG C, and the water cooling with 20-25 DEG C after casting is consistent with water temperature, sends in homogenizing stove, processes 6-7 hour at 570-580 DEG C;
(4) extrusion molding, extrusion speed is 2.5-4m/min, and casting rod temperature is 500-525 DEG C, and die temperature is 500-525 DEG C, and container temperature is 450-465 DEG C;
(5) the laggard sector-style cold quenching of extrusion molding, speed of cooling controls at 4-6 DEG C/S;
(6) tension leveling, extensibility remains on 0.8-1.4%;
(7) ageing treatment, aging temp is 150-160 DEG C, and the time is 7-8 hour, to obtain final product.
The production method of described rare earth reinforced air conditioner heat radiator aluminum alloy sheet, is characterized in that: described refining agent is made up of the raw material of following weight part: potassium fluoborate 1-1.3, potassium fluoroaluminate 20-25, KCl22-27, SiCl4 1.5-3, CaF2 2-3, Na3AlF6 3.5-5.5, gac 1-2, CCl4 0.5-1.3, CaO0.3-0.6, MgO0.6-0.8, nanometer aluminium powder 0.3-0.6, rare earth 0.2-0.3, ethanol 15-20; Preparation method is: CaO, MgO, rare earth, gac are pulverized, cross 100 mesh sieves, mix with potassium fluoborate, potassium fluoroaluminate, KCl, CaF2, Na3AlF6, ethanol, grinding 20-30 minute, dry at 150-170 DEG C to over dry, spraying dry, then mix with other remaining components, grinding distribution is even, to obtain final product.
Beneficial effect of the present invention
Aluminum alloy sheet of the present invention employs magnesium and rare earth element, considerably increases the intensity of alloy, grain refining, gas and to be mingled with phenomenon few, and aging temp is low; Production method of the present invention decreases the phenomenon of aluminium alloy stratification, peeling, bubble, crackle, improves yield rate; Refining agent refining effect of the present invention is good, significantly reduces pore and slag inclusion phenomenon.
Embodiment
A kind of rare earth reinforced air conditioner heat radiator aluminum alloy sheet, the chemical element composition that it contains and mass percent thereof are: Si0.45-0.75, La0.02-0.04, Ce0.01-0.03, Pr0.01-0.03, Nd 0.01-0.03, Ni0.24-0.49, Mg2.03-2.69, remaining as Al.
The production method of described rare earth reinforced air conditioner heat radiator aluminum alloy sheet:
(1) prepare burden, melting, temperature is 748 DEG C, smelting time 3.8 hours;
(2) refining, temperature is 748 DEG C, and refining agent consumption is 1.6% of aluminum alloy melt weight, and refining time is 28 minutes, leaves standstill 18 minutes;
(3) cast, adopt 50 height of eye temperature ceramic filter plate aluminum filtration liquid, then cast, temperature of aluminum liquid is 705 DEG C, consistent with water temperature with the water cooling of 23 DEG C after casting, sends in homogenizing stove, at 575 DEG C, processes 6.5 hours;
(4) extrusion molding, extrusion speed is 3.5m/min, and casting rod temperature is 515 DEG C, and die temperature is 515 DEG C, and container temperature is 455 DEG C;
(5) the laggard sector-style cold quenching of extrusion molding, speed of cooling controls at 5 DEG C/S;
(6) tension leveling, extensibility remains on 1.2%;
(7) ageing treatment, aging temp is 155 DEG C, and the time is 7.5 hours, to obtain final product.
Described refining agent is made up of the raw material of following weight part (kilogram): potassium fluoborate 1.1, potassium fluoroaluminate 23, KCl23, SiCl4 2.3, CaF2 2.5, Na3AlF6 4.5, gac 1.5, CCl4 2, CaO0.5, MgO0.7, nanometer aluminium powder 0.4, rare earth 0.2, ethanol 18; Preparation method is: CaO, MgO, rare earth, gac are pulverized, cross 100 mesh sieves, mix with potassium fluoborate, potassium fluoroaluminate, KCl, CaF2, Na3AlF6, ethanol, grind 25 minutes, dry at 160 DEG C to over dry, spraying dry, then mix with other remaining components, grinding distribution is even, to obtain final product.
Experimental data
According to YS/T95.1 standard, the tensile strength of 1122 state aluminium foils is 135MPa, elongation 19%, Erichsen number 5.8mm.

Claims (3)

1. a rare earth reinforced air conditioner heat radiator aluminum alloy sheet, is characterized in that: the chemical element composition that it contains and mass percent thereof are: Si0.45-0.75, La0.02-0.04, Ce0.01-0.03, Pr0.01-0.03, Nd 0.01-0.03, Ni0.24-0.49, Mg2.03-2.69, remaining as Al.
2. the production method of rare earth reinforced air conditioner heat radiator aluminum alloy sheet according to claim 1, is characterized in that:
(1) prepare burden, melting, temperature is 740-755 DEG C, smelting time 3.5-4 hour;
(2) refining, temperature is 740-755 DEG C, and refining agent consumption is 1.6% of aluminum alloy melt weight, and refining time is 26-30 minute, leaves standstill 15-20 minute;
(3) cast, adopt 50 height of eye temperature ceramic filter plate aluminum filtration liquid, then cast, temperature of aluminum liquid is 700-710 DEG C, and the water cooling with 20-25 DEG C after casting is consistent with water temperature, sends in homogenizing stove, processes 6-7 hour at 570-580 DEG C;
(4) extrusion molding, extrusion speed is 2.5-4m/min, and casting rod temperature is 500-525 DEG C, and die temperature is 500-525 DEG C, and container temperature is 450-465 DEG C;
(5) the laggard sector-style cold quenching of extrusion molding, speed of cooling controls at 4-6 DEG C/S;
(6) tension leveling, extensibility remains on 0.8-1.4%;
(7) ageing treatment, aging temp is 150-160 DEG C, and the time is 7-8 hour, to obtain final product.
3. the production method of rare earth reinforced air conditioner heat radiator aluminum alloy sheet according to claim 2, is characterized in that: described refining agent is made up of the raw material of following weight part: potassium fluoborate 1-1.3, potassium fluoroaluminate 20-25, KCl22-27, SiCl4 1.5-3, CaF2 2-3, Na3AlF6 3.5-5.5, gac 1-2, CCl4 0.5-1.3, CaO0.3-0.6, MgO0.6-0.8, nanometer aluminium powder 0.3-0.6, rare earth 0.2-0.3, ethanol 15-20; Preparation method is: CaO, MgO, rare earth, gac are pulverized, cross 100 mesh sieves, mix with potassium fluoborate, potassium fluoroaluminate, KCl, CaF2, Na3AlF6, ethanol, grinding 20-30 minute, dry at 150-170 DEG C to over dry, spraying dry, then mix with other remaining components, grinding distribution is even, to obtain final product.
CN201410684180.XA 2014-11-25 2014-11-25 Rare earth strengthening aluminum alloy sheet for air conditioner radiator and preparation method of rare earth strengthening aluminum alloy sheet CN104404318A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106086554A (en) * 2016-06-17 2016-11-09 安徽天祥空调科技有限公司 Air conditioner heat radiator aluminum alloy sheet that a kind of high intensity is anti-fracture and moulding process thereof
CN106498243A (en) * 2015-09-08 2017-03-15 浙江荣荣实业有限公司 A kind of pack alloy radiator dedicated aluminium alloy material and preparation method thereof
CN106498244A (en) * 2015-09-08 2017-03-15 浙江荣荣实业有限公司 A kind of steel aluminium composite radiator dedicated aluminium alloy material and preparation method thereof
CN110218917A (en) * 2019-06-13 2019-09-10 广西平果铝合金精密铸件有限公司 A kind of alloy aluminium bar and its preparation process containing rare earth element

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005045081A1 (en) * 2003-11-10 2005-05-19 Arc Leichtmetallkompetenzzentrum Ranshofen Gmbh Aluminium alloy, component made therefrom and method for production of said component
CN1936050A (en) * 2006-10-18 2007-03-28 东华大学 Fine grained aluminium alloy and its preparing method
CN103725939A (en) * 2013-12-17 2014-04-16 芜湖万润机械有限责任公司 Preparation method of aluminium alloy section for hot roller of duplicator
CN104226725A (en) * 2014-09-16 2014-12-24 湖北泰福瑞轻合金有限公司 Production method of aluminum-alloy pipe for positioner in rail traffic contact line

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005045081A1 (en) * 2003-11-10 2005-05-19 Arc Leichtmetallkompetenzzentrum Ranshofen Gmbh Aluminium alloy, component made therefrom and method for production of said component
CN1936050A (en) * 2006-10-18 2007-03-28 东华大学 Fine grained aluminium alloy and its preparing method
CN103725939A (en) * 2013-12-17 2014-04-16 芜湖万润机械有限责任公司 Preparation method of aluminium alloy section for hot roller of duplicator
CN104226725A (en) * 2014-09-16 2014-12-24 湖北泰福瑞轻合金有限公司 Production method of aluminum-alloy pipe for positioner in rail traffic contact line

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106498243A (en) * 2015-09-08 2017-03-15 浙江荣荣实业有限公司 A kind of pack alloy radiator dedicated aluminium alloy material and preparation method thereof
CN106498244A (en) * 2015-09-08 2017-03-15 浙江荣荣实业有限公司 A kind of steel aluminium composite radiator dedicated aluminium alloy material and preparation method thereof
CN106086554A (en) * 2016-06-17 2016-11-09 安徽天祥空调科技有限公司 Air conditioner heat radiator aluminum alloy sheet that a kind of high intensity is anti-fracture and moulding process thereof
CN110218917A (en) * 2019-06-13 2019-09-10 广西平果铝合金精密铸件有限公司 A kind of alloy aluminium bar and its preparation process containing rare earth element

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