CN111349829A - Production method of leather aluminum belt - Google Patents

Production method of leather aluminum belt Download PDF

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Publication number
CN111349829A
CN111349829A CN202010304643.0A CN202010304643A CN111349829A CN 111349829 A CN111349829 A CN 111349829A CN 202010304643 A CN202010304643 A CN 202010304643A CN 111349829 A CN111349829 A CN 111349829A
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CN
China
Prior art keywords
aluminum
casting
rolling
alloy
leather
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
CN202010304643.0A
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Chinese (zh)
Inventor
张莉
黎勇
陆佳
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Jiangsu Dingsheng New Energy Materials Co ltd
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Jiangsu Dingsheng New Energy Materials Co ltd
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Publication date
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Priority to CN202010304643.0A priority Critical patent/CN111349829A/en
Publication of CN111349829A publication Critical patent/CN111349829A/en
Pending legal-status Critical Current

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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
    • C22C21/02Alloys based on aluminium with silicon as the next major constituent
    • C22C21/04Modified aluminium-silicon alloys
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B1/00Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B3/00Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences Rolling of aluminium, copper, zinc or other non-ferrous metals
    • 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
    • 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
    • C22F1/043Changing 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B3/00Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001Aluminium or its alloys

Abstract

The invention belongs to the field of aluminum processing, and relates to a production method of a leather aluminum belt, which comprises the following process flows of ingredient smelting, modification treatment, direct cast rolling and cold rolling to obtain the leather aluminum belt; by properly proportioning the alloy components, the coarse eutectic silicon existing in the 4045 alloy is avoided; the selection of the key technological parameters of casting and rolling ensures the normal operation of the casting and rolling process, and overcomes the defect of long crystallization area of 4045 alloy.

Description

Production method of leather aluminum belt
Technical Field
The invention belongs to the field of aluminum material processing, mainly relates to an aluminum alloy strip, and particularly relates to a production method of a leather aluminum strip.
Background
The 4 series aluminum alloy aluminum plate has the advantages of low melting point, smooth joint surface, small change of the structure and performance of a weldment and the like, and is usually used as a coating layer of a radiator. In the prior art, 4-series aluminum alloy is produced into ingots by casting, and then is produced by the procedures of homogenization treatment, surface milling, hot rolling and the like. The method has the advantages of long production process, low yield and high production cost.
The examination and reading of related data at home and abroad shows that the casting and rolling production technology of the aluminum alloy is only applied to the production of 1 ××× series, 3 ××× series, 8 ××× series and other series of extremely individual aluminum alloys, because the aluminum alloy contains higher silicon, flaky eutectic silicon appears during casting and rolling production, and the silicon phase in the shape makes the cast and rolled plate body very brittle, severe cracks are generated at the edge part, and cracks are generated during subsequent rolling deformation, even the whole plate surface is crushed, so that the rolling deformation of the aluminum alloy plate cannot be realized.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a production method of a leather aluminum alloy, and aims to provide technical parameters and a modification scheme suitable for the leather aluminum alloy by controlling the temperature, the casting-rolling speed, the casting-rolling area and the silicon phase modification, so that the casting-rolling industrial production of the leather aluminum alloy is realized, the production flow is finally shortened, and the production cost is reduced.
In order to achieve the purpose of the invention, the invention adopts the technical scheme that:
a leather aluminum belt comprises the following elements in percentage by mass: cu: 0.3-0.6%, Fe: 0.9-1.0%, Zn: 0.4-0.6%, Si: 10.0-12.0%, Ti: 0.3-0.5%, and the balance of Al and impurities.
A production method of a leather aluminum belt is characterized by comprising the following steps:
the raw materials are proportioned according to the mass percent of each element, smelted, stirred and slag-pulled in a smelting furnace, and after the raw materials in the smelting furnace are completely liquefied, the raw materials are led into a standing furnace, and the temperature of the led furnace is 730-;
refining and degassing in a standing furnace, controlling the temperature of the aluminum alloy solution flowing out of the standing furnace to be 730-;
and casting and rolling the treated aluminum liquid, wherein the casting and rolling adopts a small casting and rolling area, the casting and rolling temperature is 660-690 ℃, and the casting and rolling speed is 600-700 mm/min.
Further, the rotation speed of the degassing tank is 600-.
Further, the alterant is aluminum-titanium-boron rare earth alloy.
Further, the mass percent of B in the alterant is 0.2-0.3%.
Further, the hydrogen content in the aluminum alloy liquid is less than 0.5mL/100g through degassing in a degassing box.
Furthermore, the grain size of the alterant is less than grade 1.
Further, in the step (2), the adding speed of the alterant is 100 mm/min.
Further, the step of adding raw materials comprises: pre-burying an aluminum ingot at the bottom of the furnace, and then adding an aluminum-silicon intermediate alloy and an aluminum-iron intermediate alloy to adjust components.
Further, the length of the casting and rolling area is 35-55 mm.
Compared with the prior art, the invention has the outstanding advantages that:
(1) the traditional production method of the leather aluminum alloy is a semi-continuous casting and hot rolling composite method, and the specific process flows comprise ingredient smelting, modification treatment, semi-continuous casting, annealing, surface milling hot rolling and cold rolling to finally obtain the leather aluminum strip;
(2) the process parameter control in the invention ensures the even components of the aluminum alloy solution, and allows the alloy elements to have enough time to diffuse at higher temperature;
(3) the invention adopts the cast-rolling method for production, thereby realizing the shortening of the cast-rolling period and saving the cost; on the basis of the 4045 alloy, by properly proportioning the alloy components, the coarse eutectic silicon existing in the 4045 alloy is avoided; the selection of the key process parameters of casting and rolling ensures the normal operation of the casting and rolling process, and the defect of the crystal zone length of 4045 alloy is overcome by more than 5 grades of silicon particles according to the GB/T6394-2002 metal average grain size determination method.
(4) The modifier Al-Ti-B-RE is adopted, and the rare earth element (RE) belongs to a surface active substance, so that segregation is easily adsorbed on a crystal boundary and a phase surface of aluminum, and the defects on a crystal surface are filled, so that the aggregation of TiB2 and TiAl3 is hindered, and the effect of refining TiB2 and TiAl3 is achieved. Therefore, the Al-Ti-B-RE can basically eliminate TiB2 precipitate, and has the advantages of obvious refining effect, good long-acting property, small addition amount and strong high temperature resistance.
Detailed Description
The production method for preparing the leather aluminum alloy comprises the following steps:
example 1
A leather aluminum belt comprises the following elements in percentage by mass: cu: 0.3%, Fe: 0.9%, Zn: 0.5%, Si: 10.0%, Ti: 0.3%, and the balance of Al and impurities.
1. Material preparation and smelting: proportioning the components of the aluminum alloy, pre-burying an aluminum ingot at the bottom of a furnace, and then adding an aluminum-silicon intermediate alloy and an aluminum-iron intermediate alloy to adjust the components; smelting, stirring and slag drawing in a smelting furnace, introducing into a standing furnace after raw materials in the smelting furnace are completely liquefied, and introducing the temperature of the furnace to be 730 ℃;
2. modification and degassing treatment: refining and degassing in a standing furnace, controlling the temperature of an aluminum alloy solution flowing out of the standing furnace to be 740 ℃, adding modifier aluminum-titanium-boron rare earth alloy into a degassing box, and rotating the degassing box at 600 revolutions per minute;
3. a casting and rolling procedure: and casting and rolling the treated aluminum liquid, wherein the casting and rolling adopt a small casting and rolling area, the casting and rolling area is 35mm, the casting and rolling temperature is controlled at 670 ℃, and the casting and rolling speed is controlled at 600 mm/min.
The tensile strength is 155MPa and the elongation is 30 percent according to the method for detecting the tensile strength of the GB/T228.1-2010 metal material by the room-temperature tensile test method. According to the GB/T6394-2002 metal average grain size determination method, the grain size reaches the first grade. According to the rating of the test sample and the test piece after the corrosion test of the metal and other inorganic coatings on the GB/T6461-2002 metal matrix, the corrosion resistance is more than 9 grades.
Example 2
A leather aluminum belt comprises the following elements in percentage by mass: cu: 0.6%, Fe: 1.0%, Zn: 0.6%, Si: 11.0%, Ti: 0.5%, the balance being Al and impurities.
1. Material preparation and smelting: proportioning the components of the aluminum alloy, pre-burying an aluminum ingot at the bottom of a furnace, and then adding an aluminum-silicon intermediate alloy and an aluminum-iron intermediate alloy to adjust the components; smelting, stirring and slag drawing in a smelting furnace, introducing into a standing furnace after raw materials in the smelting furnace are completely liquefied, and introducing the furnace to the temperature of 740 ℃;
2. modification and degassing treatment: refining and degassing in a standing furnace, controlling the temperature of an aluminum alloy solution flowing out of the standing furnace to be 730 ℃, adding modifier aluminum-titanium-boron rare earth alloy into a degassing box, and rotating the degassing box at 650 r/min;
3. a casting and rolling procedure: and casting and rolling the treated aluminum liquid, wherein the casting and rolling adopt a small casting and rolling area, the casting and rolling area is 45mm, the casting and rolling temperature is controlled at 690 ℃, and the casting and rolling speed is controlled at 700 mm/min.
The tensile strength is 150MPa and the elongation is 32 percent according to the tensile strength detection method of the GB/T228.1-2010 metal material room temperature tensile test method. According to the GB/T6394-2002 metal average grain size determination method, the grain size reaches the first grade. According to the rating of the test sample and the test piece after the corrosion test of the metal and other inorganic coatings on the GB/T6461-2002 metal matrix, the corrosion resistance is more than 9 grades.
Example 3
A leather aluminum belt comprises the following elements in percentage by mass: cu: 0.5%, Fe: 0.9%, Zn: 0.4%, Si: 12.0%, Ti: 0.4%, and the balance of Al and impurities.
1. Material preparation and smelting: proportioning the components of the aluminum alloy, pre-burying an aluminum ingot at the bottom of a furnace, and then adding an aluminum-silicon intermediate alloy and an aluminum-iron intermediate alloy to adjust the components; smelting, stirring and slag drawing in a smelting furnace, introducing into a standing furnace after raw materials in the smelting furnace are completely liquefied, and introducing the temperature of the standing furnace to 760 ℃;
2. modification and degassing treatment: refining and degassing in a standing furnace, controlling the temperature of an aluminum alloy solution flowing out of the standing furnace to be 735 ℃, adding modifier aluminum-titanium-boron rare earth alloy into a degassing box, and rotating the degassing box at 650 r/min;
3. a casting and rolling procedure: and casting and rolling the treated aluminum liquid, wherein the casting and rolling adopts a small casting and rolling area, the casting and rolling area is 55mm, the casting and rolling temperature is controlled at 680 ℃, and the casting and rolling speed is controlled at 650 mm/min.
The tensile strength is 158MPa and the elongation is 30% according to the tensile strength detection method of the GB/T228.1-2010 metal material room temperature tensile test method. According to the GB/T6394-2002 metal average grain size determination method, the grain size reaches the first grade. According to the rating of the test sample and the test piece after the corrosion test of the metal and other inorganic coatings on the GB/T6461-2002 metal matrix, the corrosion resistance is more than 9 grades.
Comparative example 1
A leather aluminum belt is prepared according to the preparation steps in patent 201410832786.3 by the mass percent of each element,
the preparation method comprises the following steps: 1. smelting according to weight percentage, smelting according to weight percentage Si: 9.5 to 10.5 percent; fe: 0.6-0.7%; the balance of the raw materials are impurity elements and 4045 alloy of aluminum, wherein the aluminum-silicon intermediate alloy is pre-buried at the furnace bottom as an additive. 2. Melting the raw materials, and carrying out normal smelting treatment including stirring, deslagging, refining and the like to 720 ℃ and then conducting furnace guiding. 3. And introducing the aluminum liquid into a standing furnace for modification treatment. Adding an aluminum-strontium alloy ingot in a standing furnace, wherein the weight content of strontium in the aluminum-alloy is 5 percent, and the balance is aluminum; fully stirring, refining by using argon, and performing subsequent casting and rolling after the temperature of the aluminum liquid reaches 710 ℃. 4. Carrying out secondary modification in the launder, wherein in the secondary modification treatment, aluminum-strontium alloy is added in the launder, the weight content of strontium in the aluminum-strontium alloy is 5 percent, and the balance is aluminum, so that the weight content of strontium in molten aluminum before casting and rolling is 0.03-0.05 percent; casting and rolling the treated aluminum liquid, wherein the casting and rolling area is 65mm, and the casting and rolling temperature is controlled at 645 ℃; the casting and rolling speed is controlled at 550 mm/min. The produced cast-rolled coil is fastened by an inner ring steel belt, and an outer ring is welded and fastened by the steel belt.
The results of comparing the products of the examples and comparative examples are as follows:
tensile strength Elongation percentage Grain size Corrosion resistance
Example 1 155MPa 30% First stage Grade 9 or above
Example 2 150MPa 32% First stage Grade 9 or above
Example 3 158MPa 30% First stage Grade 9 or above
Comparative example 1 135MPa 5% Second stage Stage 7
The data show that the parameters of tensile strength, elongation percentage, grain size, corrosion resistance and the like in the embodiment of the invention are obviously superior to those of a comparative example because the invention adopts the optimized alloy proportioning, increases copper element to improve the mechanical property, increases zinc element to improve the corrosion resistance, uses Al-Ti-B-RE wire as a modifier to improve the grain refinement, and solves the problem of TiB2 precipitation, so that the invention has greater advantages.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The leather material aluminum belt is characterized in that the leather material aluminum belt comprises the following elements in percentage by mass: cu: 0.3-0.6%, Fe: 0.9-1.0%, Zn: 0.4-0.6%, Si: 10.0-12.0%, Ti: 0.3-0.5%, and the balance of Al and impurities.
2. A production method of a leather aluminum belt is characterized by comprising the following steps:
the raw materials with the mass percent ratio of each element as claimed in claim 1 are smelted, stirred and slag-pulled in a smelting furnace, and are introduced into a standing furnace after the raw materials in the smelting furnace are completely liquefied, wherein the guide furnace temperature is 730-;
refining and degassing in a standing furnace, controlling the temperature of the aluminum alloy solution flowing out of the standing furnace to be 730-;
and casting and rolling the treated aluminum liquid, wherein the casting and rolling adopts a small casting and rolling area, the casting and rolling temperature is 660-690 ℃, and the casting and rolling speed is 600-700 mm/min.
3. The method as claimed in claim 2, wherein the rotation speed of the degassing tank is 600-700 rpm.
4. A method for producing a skin aluminium strip according to claim 2, characterised in that the modificator is an aluminium titanium boron rare earth alloy.
5. The method for producing a leather aluminum strip according to claim 4, wherein the modifier contains B in an amount of 0.2-0.3% by mass.
6. A method for producing a skin material aluminium strip according to claim 2, characterised in that the aluminium alloy liquid has a hydrogen content of <0.5mL/100g by degassing in a degassing tank.
7. A method for producing a skin aluminium strip according to claim 2, characterised in that the grain size of the inoculant is < grade 1.
8. A method for producing a leather aluminium strip according to claim 2, characterised in that the rate of addition of the inoculant is 100 mm/min.
9. The method for producing the leather aluminum strip as claimed in claim 2, wherein the step of adding raw materials comprises: pre-burying an aluminum ingot at the bottom of the furnace, and then adding an aluminum-silicon intermediate alloy and an aluminum-iron intermediate alloy to adjust components.
10. A method of producing a skin aluminium strip according to claim 2, characterised in that the length of the casting area is 35-55 mm.
CN202010304643.0A 2020-04-17 2020-04-17 Production method of leather aluminum belt Pending CN111349829A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112410594A (en) * 2020-11-27 2021-02-26 江苏鼎胜新能源材料股份有限公司 Manufacturing method of 4343 aluminum alloy skin material for brazing composite material

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CN1546708A (en) * 2003-12-03 2004-11-17 东华大学 Aluminum silicon alloy series possessing granulated silicon phase and its process
CN102134669A (en) * 2011-01-04 2011-07-27 潍坊三源铝业有限公司 Collecting pipe material for micro-channel heat exchanger and preparation method thereof
CN102641889A (en) * 2012-04-06 2012-08-22 东北大学 Preparation method of brazing composite aluminum foil
CN103215480A (en) * 2013-04-15 2013-07-24 东北大学 Cast rolling production method of 4343 aluminum alloy plate
US20130302643A1 (en) * 2011-01-21 2013-11-14 Hydro Aluminium Rolled Products Gmbh Aluminium alloy free from si primary particles
US20150349319A1 (en) * 2014-05-27 2015-12-03 Samsung Sdi Co., Ltd. Rechargeable battery having a plate terminal
EP3342890A1 (en) * 2016-12-28 2018-07-04 Befesa Aluminio, S.L. Aluminium casting alloy
CN109338177A (en) * 2018-11-13 2019-02-15 苏州仓松金属制品有限公司 A kind of rotten aluminum alloy materials of AlSi10Mg system and its rotten production technology
CN109881031A (en) * 2019-03-01 2019-06-14 江苏鼎胜新能源材料股份有限公司 A kind of production method of 7072 alloy blank

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4409036A (en) * 1980-12-23 1983-10-11 Aluminum Company Of America Aluminum alloy sheet product suitable for heat exchanger fins and method
CN1546708A (en) * 2003-12-03 2004-11-17 东华大学 Aluminum silicon alloy series possessing granulated silicon phase and its process
CN102134669A (en) * 2011-01-04 2011-07-27 潍坊三源铝业有限公司 Collecting pipe material for micro-channel heat exchanger and preparation method thereof
US20130302643A1 (en) * 2011-01-21 2013-11-14 Hydro Aluminium Rolled Products Gmbh Aluminium alloy free from si primary particles
CN102641889A (en) * 2012-04-06 2012-08-22 东北大学 Preparation method of brazing composite aluminum foil
CN103215480A (en) * 2013-04-15 2013-07-24 东北大学 Cast rolling production method of 4343 aluminum alloy plate
US20150349319A1 (en) * 2014-05-27 2015-12-03 Samsung Sdi Co., Ltd. Rechargeable battery having a plate terminal
EP3342890A1 (en) * 2016-12-28 2018-07-04 Befesa Aluminio, S.L. Aluminium casting alloy
CN109338177A (en) * 2018-11-13 2019-02-15 苏州仓松金属制品有限公司 A kind of rotten aluminum alloy materials of AlSi10Mg system and its rotten production technology
CN109881031A (en) * 2019-03-01 2019-06-14 江苏鼎胜新能源材料股份有限公司 A kind of production method of 7072 alloy blank

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112410594A (en) * 2020-11-27 2021-02-26 江苏鼎胜新能源材料股份有限公司 Manufacturing method of 4343 aluminum alloy skin material for brazing composite material

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