CN105452499A - High strength aluminum alloy fin stock for heat exchanger - Google Patents

High strength aluminum alloy fin stock for heat exchanger Download PDF

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Publication number
CN105452499A
CN105452499A CN201480044210.9A CN201480044210A CN105452499A CN 105452499 A CN105452499 A CN 105452499A CN 201480044210 A CN201480044210 A CN 201480044210A CN 105452499 A CN105452499 A CN 105452499A
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CN
China
Prior art keywords
weight
ingot
aluminum alloy
heat exchanger
finstock
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201480044210.9A
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Chinese (zh)
Inventor
A.D.豪厄尔斯
K.M.加滕比
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Novelis Inc Canada
Novelis Inc
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Novelis Inc Canada
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Filing date
Publication date
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Publication of CN105452499A publication Critical patent/CN105452499A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D15/00—Casting using a mould or core of which a part significant to the process is of high thermal conductivity, e.g. chill casting; Moulds or accessories specially adapted therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
    • B22D21/002—Castings of light metals
    • B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D7/00—Casting ingots, e.g. from ferrous metals
    • B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/26—Methods of annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • 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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • 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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C22C21/04—Modified aluminium-silicon alloys
    • 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
    • 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
    • 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
    • C22F1/043—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 silicon as the next major constituent
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/124—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and being formed of pins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00—Fins
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/04—Fastening; Joining by brazing

Abstract

The present invention provides an aluminum alloy fin stock alloy material with higher strength, and improved sag resistance for use in heat exchangers. This aluminum alloy fin stock alloy material was made by direct chill (DC) casting.

Description

For the high strength aluminium fin stock of heat exchanger
the cross reference of related application
This application claims the rights and interests of the U.S. Provisional Patent Application sequence number 61/863,568 that on August 8th, 2013 submits to, the mode that described temporary patent application is quoted in full is incorporated herein.
Technical field
The present invention relates to Materials science, materials chemistry, metallurgy, aluminium alloy, aluminium manufacture field and association area.The invention provides the novel aluminum alloy for the manufacture of heat exchanger fin, described heat exchanger fin is again in various heat exchanger unit such as vehicle radiator, condenser, vaporizer and relative unit.
Background technology
Need for the aluminum alloy finstock with the sagging resistance high strength of high strength and improvement in various heat exchanger application (comprising automobile radiators).Need to obtain the aluminum alloy finstock being used for high-performance heat exchangers application, the radiator element of the braze material sagging resistance that namely mechanical property before it has strong brazing, good behavior during brazing strengthen and reduction corrodes, and after brazing good intensity and transport properties.
Summary of the invention
The invention provides for the aluminum alloy finstock alloy material with the sagging resistance of more high strength and improvement in heat exchanger.This aluminum alloy finstock alloy material is manufactured by direct Quench (DC) casting.
Mechanical property, sagging resistance, erosion resistance and conductive DC cooling fin blank after (H14 tempering) and brazing before exploitation has desired brazing.Described aluminum alloy finstock alloy shows larger crystal grain and the intensity of improvement before brazing.
Described aluminum alloy finstock alloy can be used for various application examples as in heat exchanger.Described cooling fin blank is particularly useful for high-performance light car heat exchanger, but also can be used for other brazing application, includes, but is not limited to HVAC.In one embodiment, described aluminum alloy finstock alloy can be used for car heat exchanger as in scatterer, condenser and vaporizer.According to the following detailed description of embodiment of the present invention, other objects of the present invention and advantage will be apparent.
Embodiment
The invention provides for heat exchanger as the aluminum alloy finstock alloy material with the more erosion resistance of high strength, improvement and the sagging resistance of improvement in car heat exchanger.This aluminum alloy finstock alloy material is manufactured by direct-chill casting.
Mechanical property, sagging resistance, erosion resistance and conductivity after (H14 tempering) and brazing before this DC cooling fin blank represents desired brazing.Described aluminum alloy finstock alloy shows larger crystal grain and the intensity of improvement before brazing.
Described aluminum alloy finstock alloy can be used for various application examples as in heat exchanger.In one embodiment, described aluminum alloy finstock alloy can be used for car heat exchanger as in scatterer, condenser and vaporizer.
In one embodiment, described DC cooling fin blank comprises about 0.8-1.4%Si, 0.4-0.8%Fe, 0.05-0.4%Cu, 1.2-1.7%Mn and 1.2-2.3%Zn, and surplus is aluminium.All % values are all in weight (wt) %.
In another embodiment, described DC cooling fin blank comprises about 0.9-1.3%Si, 0.45-0.75%Fe, 0.10-0.30%Cu, 1.3-1.7%Mn and 1.30-2.2%Zn, and surplus is aluminium.
In another embodiment, described DC cooling fin blank comprises about 0.9-1.2%Si, 0.50-0.75%Fe, 0.15-0.30%Cu, 1.4-1.6%Mn and 1.4-2.1%Zn, and surplus is aluminium.
Optionally, Cr and/or Zr or other grain-size control elements up to 0.2%, up to 0.15%%, up to 0.1%, up to 0.05% or can be present in these alloy composites up to 0.03% separately.All % values are all in weight (wt) %.
Should be understood that alloy composite as herein described can contain other minor elements, sometimes referred to as being not intended to element, lower than 0.05%.
Manufacture the method for ingot
Ingot as herein described utilizes direct Quench (DC) method to manufacture, described method is generally used in whole aluminium sheet industry, cast the large ingot of about 1.5m × 0.6m × 4m thus from large holding furnace, described large holding furnace is to the one or more shallow mould supplying metal being supplied with water coolant.Solidification ingot is slowly taken out until complete one or more complete ingot from mold bottom by the direct impact continuous coo1ing of water coolant.Once cool from castingprocesses, just process to remove surface segregation and irregularity to ingot rolled surface.By the ingot preheating through processing for hot rolling.Preheating temperature and time length are controlled as low-level to keep large grain-size and high strength after finished product cooling fin blank is by brazing.By ingot hot rolling to form coiled material, then cold rolling to it.Cold-rolled process carry out with several step and the process annealing applied within the scope of about 300-450 DEG C to make material recrystallization before final cold rolling step.Then by cold rolling for material to obtain required ultimate criterion size and to be cut into the fillet being suitable for manufacturing scatterer and other car heat exchangers.Ingot carried out preheating as follows before hot rolling, to make reached final metal temperature for about 480 DEG C and to keep average about 4 hours (usually minimum about 2 hours and about 12 hours at most) at this.Some ingots (about 8 to 30) to be loaded in stove and with gas or electrical pre-heating to rolling temperature.Aluminium alloy is rolling in about 450 DEG C to about 560 DEG C scopes usually.If temperature is excessively cold, then rolling load is too high, and if temperature overheating, then metal may be crossed soft and decompose in milling train.In this case, preheating temperature is lower relative to other aluminium products and soaking time is relatively short, and to limit the growth of dispersate, this is by grain-size after brazing final for reduction.In fact, schedule is ranked with the many different ingots of rolling and alloy and can not always rolling ingot under minimum soak time to hot rolls.In one embodiment, the minimum soak time at about 480 DEG C is about 2 hours.During manufacture, the intermediate anneal temperature applied is about 400 DEG C, continues average about 3 hours, then applies cold working (CW) % of about 29% to ultimate criterion size.%CW is the cold rolling degree for the material obtained within the scope of final desirable strength applies.Cold working % is defined as: (primary standard size-ultimate criterion size) × 100/ primary standard size.Along with cold working increases, H14 intensity increases, but after final brazing, grain-size and sagging resistance reduce.For most of aluminium rolling application, 29% is relatively low.
In one embodiment, be used in the warm-up operation continuing average 4 hours at about 480 DEG C, its %CW with the intermediate anneal temperature of about 300-400 DEG C and about 25-35% is to ultimate criterion size.
Then cold rolling for finished product coiled material is cut into the many fillets with width needed for heat exchanger manufacturers for shaping, assembling and brazing finished product heat exchanger.
Following examples will be used for further illustrating the present invention, and not constitute any limitation it simultaneously.On the contrary, should be expressly understood, can resort to various embodiment, its amendment and equivalents, after reading description herein, those skilled in the art can associate them in the case of without departing from the spirit of the present invention.
Embodiment
Manufacture the alloy composite of DC situation.The compositing range of described alloy is in following specification: 1.1 ± 0.1%Si, 0.6 ± 0.1%Fe, 0.2 ± 0.05%Cu, 1.4 ± 0.1%Mn and 1.50 ± 0.1%Zn, and surplus is aluminium.Described alloy material has the lowest limit tensile strength of about 130MPa.Described alloy material has the average conduction rate (I.A.C.S. (that is, fine copper is 100% conductivity)) of about 43IACS and the open circuit potential erosion number (relative to standard calomel electrode (SCE)) of-741mV after brazing.Manufactured alloy material represents the sagging value between 28mm (wherein ultimate criterion is of a size of 49 μm) and 43mm (wherein ultimate criterion is of a size of 83 μm), and under these standard sizes, it is in required specification.After applying simulation brazing cycle, measure these values, thus sample is heated to the temperature of 605 DEG C and was cooled to room temperature with the temperature time curve of simulate commercial brazing process within about 20 minute period.The standard size of manufactured alloy material changes between 49 μm and 83 μm.
Above-cited all patents, patent application, the open and mode quoted all in full of making a summary are incorporated herein.Multiple embodiments of the present invention has been described when realizing multiple object of the present invention.It should be understood that these embodiments only illustrate principle of the present invention.When do not depart from as in following claims define the spirit and scope of the present invention, its numerous amendment and transformation will be those skilled in the art institute apparent.

Claims (16)

1. an aluminium alloy, it comprises about 0.8-1.4 % by weight Si, 0.4-0.8 % by weight Fe, 0.05-0.4 % by weight Cu, 1.2-1.7 % by weight Mn and 1.20-2.3 % by weight Zn, and surplus is Al.
2. aluminium alloy as claimed in claim 1, it comprises about 0.9-1.3 % by weight Si, 0.45-0.75 % by weight Fe, 0.10-0.3 % by weight Cu, 1.3-1.7 % by weight Mn and 1.30-2.2 % by weight Zn, and surplus is Al.
3. aluminium alloy as claimed in claim 1, it comprises about 0.9-1.2 % by weight Si, 0.5-0.75 % by weight Fe, 0.15-0.3 % by weight Cu, 1.4-1.6 % by weight Mn and 1.4-2.1 % by weight Zn, and surplus is Al.
4. the aluminium alloy as described in any one in claims 1 to 3, it also comprises up to one or both in Cr or Zr of 0.2 % by weight.
5. an aluminum alloy finstock, it is by the following method by the aluminium alloy manufacture as described in any one in Claims 1-4, and described method comprises:
Described aluminium alloy direct-chill casting is become ingot;
Described ingot is preheated to 450 to 560 DEG C and continues 2 to 16 hours;
Preheating ingot described in hot rolling;
Cold rolling described ingot;
Process annealing is carried out at the temperature of 300-450 DEG C; With
After process annealing, carry out final cold rolling step to reach the cold working % (%CW) of 25-35%.
6. aluminum alloy finstock as claimed in claim 5, wherein said ingot is preheating 2-12 hour at 480 DEG C.
7. the aluminum alloy finstock as described in claim 5 or 6, wherein said intermediate anneal temperature is 300-400 DEG C.
8. the aluminum alloy finstock as described in any one in claim 5 to 7, it has the lowest limit tensile strength being measured as about 130MPa after brazing.
9. the aluminum alloy finstock as described in any one in claim 5 to 7, it has the corrosion potential being measured as-700mV or less after brazing.
10. a heat exchanger, it comprises the aluminium alloy as described in any one in Claims 1-4 or the aluminum alloy finstock as described in any one in claim 5 to 9.
11. heat exchangers as claimed in claim 10, wherein said heat exchanger is car heat exchanger.
12. heat exchangers as claimed in claim 10, wherein said heat exchanger is scatterer, condenser or vaporizer.
The purposes of 13. 1 kinds of aluminium alloys as described in any one in Claims 1-4 or the aluminum alloy finstock as described in any one in claim 5 to 9, it is for the manufacture of heat exchanger fin.
14. 1 kinds of methods for the manufacture of aluminum alloy finstock, it comprises:
Aluminium alloy direct-chill casting as described in any one in Claims 1-4 is become ingot;
Described ingot is preheated to 450 to 560 DEG C and continues 2 to 16 hours;
Preheating ingot described in hot rolling;
Cold rolling described ingot;
Process annealing is carried out at the temperature of 300-450 DEG C; With
After process annealing, carry out final cold rolling step to reach the cold working % (%CW) of 25-35%.
15. methods as claimed in claim 14, wherein said ingot is preheating 2-12 hour at 480 DEG C.
16. methods as described in claims 14 or 15, wherein said intermediate anneal temperature is 300-400 DEG C.
CN201480044210.9A 2013-08-08 2014-08-08 High strength aluminum alloy fin stock for heat exchanger Pending CN105452499A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201361863568P 2013-08-08 2013-08-08
US61/863568 2013-08-08
PCT/US2014/050346 WO2015021383A1 (en) 2013-08-08 2014-08-08 High strength aluminum alloy fin stock for heat exchanger

Publications (1)

Publication Number Publication Date
CN105452499A true CN105452499A (en) 2016-03-30

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Country Status (9)

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US (1) US20160195346A1 (en)
EP (1) EP3030684A1 (en)
JP (1) JP2016534223A (en)
KR (2) KR20160042056A (en)
CN (1) CN105452499A (en)
BR (1) BR112016002234A2 (en)
CA (1) CA2919193A1 (en)
MX (1) MX2016001557A (en)
WO (1) WO2015021383A1 (en)

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KR101988704B1 (en) * 2013-08-08 2019-06-12 노벨리스 인크. High strength aluminum alloy fin stock for heat exchanger
ES2826482T3 (en) 2014-08-06 2021-05-18 Novelis Inc Aluminum alloy for heat exchanger fins
CN105734368B (en) * 2014-12-24 2020-03-17 三菱铝株式会社 Aluminum alloy fin material, method for producing same, and heat exchanger provided with same

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Publication number Priority date Publication date Assignee Title
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EP3030684A1 (en) 2016-06-15
WO2015021383A1 (en) 2015-02-12
KR20180063380A (en) 2018-06-11
BR112016002234A2 (en) 2017-08-01
JP2016534223A (en) 2016-11-04
KR20160042056A (en) 2016-04-18
US20160195346A1 (en) 2016-07-07
MX2016001557A (en) 2016-05-02
CA2919193A1 (en) 2015-02-12

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