CN107034396B - A kind of preparation method of high-speed rail sound barrier aluminium strip - Google Patents

A kind of preparation method of high-speed rail sound barrier aluminium strip Download PDF

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Publication number
CN107034396B
CN107034396B CN201710283144.6A CN201710283144A CN107034396B CN 107034396 B CN107034396 B CN 107034396B CN 201710283144 A CN201710283144 A CN 201710283144A CN 107034396 B CN107034396 B CN 107034396B
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aluminium
thickness
aluminum melt
rolling
sound barrier
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CN107034396A (en
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韩成艺
张安乐
代永强
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LUOYANG LONGDING ALUMINUM CO Ltd
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LUOYANG LONGDING ALUMINUM CO Ltd
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    • 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
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-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
    • B21B1/22—Metal-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 plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/26—Metal-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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-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
    • B21B1/22—Metal-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 plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-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 plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0269—Cleaning
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/026—Alloys based on aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/02—Making non-ferrous alloys by melting
    • C22C1/03—Making non-ferrous alloys by melting using master alloys
    • 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
    • C22F1/047—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 magnesium as the next major constituent
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling 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
    • B21B2003/001—Aluminium or its alloys

Abstract

A kind of preparation method of high-speed rail sound barrier aluminium strip, the aluminium ingot and aluminium alloy solid waste of the electrolytic aluminium liquid of 70~80% weights and 10~20% weights and aluminium content >=99.7% are first put into progress melting in smelting furnace together and prepare aluminum melt, casting and rolling process is used to prepare 3~5mm thickness aluminium volume again, check that packaging prepares 1.0~2.0mm thickness high-speed rail sound barrier aluminium strips finally by cold rolling → cleaning trimming → finished products → slitting rewinds →, wherein clean trimming, slitting rewinds and checks that routinely technique carries out packaging, shorten technological process, reduce production cost, its tensile strength of the aluminium strip prepared can reach 240~280Mpa, elongation percentage >=15% and 90 ° of bendings are not split.

Description

A kind of preparation method of high-speed rail sound barrier aluminium strip
Technical field
The invention belongs to new material research field, especially a kind of preparation method of high-speed rail sound barrier aluminium strip.
Background technology
High ferro is a kind of novel product using honeycomb sound insulation technology with sound barrier, generally pours sound using armored concrete Barrier or aluminum metal sound barrier.Although the former manufacturing cost early period is low, service life is short and forms building waste, makes At noxious waste pollution, using receiving very big limitation.The latter is by processing such as adjustment, the physics spray paintings of specific alloy ingredient Afterwards, it can not only reach very high intensity, while self also good anti-corrosion ability, can effectively prolong the service life, i.e., Make after service life expires, recycling and secondary use can be also carried out by modes such as remeltings, any shadow will not be caused to environment It rings.
Aluminum metal sound barrier generally mostly uses 5754 alloy productions, 5754 alloy hot rolling blanks by cold rolling appropriate and It anneals to obtain high ferro acoustic baffle, but since its production cost is high compared with continuous casting and rolling blank, is constantly subjected to industry and denounces.Heat Rolling 5754 alloys and preparing the conventional flowsheet of acoustic baffle is：Melting and casting → hot rolling → cold rolling → cleaning trimming → finished products → slitting rewinds → checks that packaging, each process are summarized as follows：
One, melting and casting：
Conventional 5754 alloy castings use direct-cooled casting ingot process, aluminium ingot, solid when melting using 99.7% or more content Waste material or the aluminium ingot of 99.7% or more content, solid waste are that raw material is put into progress melting in smelting furnace, pass through alloying component To ensure melt quality, it is right in national standard GB/T3190-2012 that the chemical composition of melt meets the processes such as configuration, aluminum melt processing The requirement of 5754 alloying components and referring to following table.At 750 ± 5 DEG C, hydrogen content is controlled in 0.15ml/100g melting Control for Kiln Temperature Al using rotation air blast when casting hereinafter, carry out online degasification, and filtering uses 30PPi single-stages to filter, and alterant uses Al- 5Ti-B, aluminum melt form 400~600mm thickness ingot castings by mold.
Two, hot rolling：
First ingot casting that above-mentioned founding is processed saw head, milling face are reheated again, keep the temperature 20 under the conditions of 480~520 DEG C~ 25 hours, then the ingot casting after heating is thick to 6~8mm by the roughing mill cogging multi- pass rolling of big processing capacity and with coiled material shape Formula is transferred to cold rolling process.
Three, cold rolling：
Between 6~8mm thickness hot rolled coils are cold rolled to finished product 1.0~2.0mm thickness through multi-pass cold rolling, every time working modulus control System is between 20~35%.It requires to pay attention to the clear each deflector roll wiped in guide passage when rolling, prevents aluminium strip surface from having mark, viscous wound etc. Defect.Final pass must replace working roll when rolling, and clear each roller wiped in guide passage, supporting stick surface is not all right must be more Change support roller；Aluminium strip surface is checked, any influence such as scratch, scuffing, Periodic Traveling mark, bright wisp and aberration are not allow for The surface defect used.
Four, trimming is cleaned：
The each deflector roll that must be wiped clearly when trimming in guide passage is cleaned, each deflector roll is wiped clearly with alcohol or acetone, it is ensured that aluminium is rolled up Surface cannot have mark, viscous aluminium, scratch, scuffing, and end face is not allow for small broken sea of burr, turriform, scollop, scallop, edge etc., intermediate Trimming staggered floor is necessarily less than 2mm.
Water temperature hydraulic pressure and cleaning speed are controlled when cleaning, ensures cleaning quality, avoid annealing back plate belt surface from occurring yellow Oil mark, while access panel belt surface whether there is the surface quality defects such as mark, bright wisp, aberration caused by rolling process.
Five, finished products：
Finished products check supplied materials end face situation, and volume phenomenon whether is touched between aluminium volume.Finished product annealing process is：3h heats up To 320 DEG C, then the 30-40h that anneals at a temperature of 320 DEG C.Material is unable to blanking rack after annealing is come out of the stove.Material must be complete after annealing It is cold to turn lower process again.
Six, slitting rewinds：
Each deflector roll in guide passage must be wiped when rewinding clearly, each deflector roll is wiped clearly with alcohol or acetone；Ensure that aluminium rolls up surface Cannot there are mark, viscous aluminium, scratch, scuffing, end face is smooth, no string layer, tower.
Seven, it checks and packs；
Mainly check that al zone thickness, width must not exceed the margin of tolerance when finished product inspection, end face must not jagged, flange, It wounds, staggered floor must not exceed 0.5mm.Compliant sleeve, material have to comply with customer requirement, and sleeve both sides stretch out aluminium foil end face and are respectively 5mm.It is required that accomplishing that tensile strength reaches 240-280Mpa, 90 ° of bendings are not split, according to the packing instructions packet of sound barrier panel after qualification Dress.
Its tensile strength of the aluminium strip of above-mentioned preparation can reach 240Mpa and 90 ° of bending and not split, but long there are the production cycle, The problems such as of high cost, thus seek it is a kind of can reduce production cost, shorten delivery date preparation method become at present production high ferro The important subject of sound barrier aluminium strip.
Invention content
To solve the above problems, the present invention provides a kind of preparation methods of high-speed rail sound barrier aluminium strip, first by electrolytic aluminium Liquid and aluminium ingot, aluminium alloy solid waste are smelted into aluminum melt, then prepare 3~5mm thickness aluminium volume using casting and rolling process, finally By the reasonable setting of the procedures parameters such as cold rolling, straightening cleaning and finished products, technological process is shortened, life is reduced Cost is produced, its tensile strength of the aluminium strip prepared reaches 240~280Mpa, elongation percentage >=15% and 90 ° of bendings are not split.
In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme that：
A kind of preparation method of high-speed rail sound barrier aluminium strip, the preparation method is first by electrolytic aluminium liquid and aluminium ingot and aluminium alloy Solid waste melting aluminum melt, then 3~5mm thickness aluminium volume is prepared using casting and rolling process, finally by cold rolling → cleaning trimming → finished products → slitting rewinds → check that packaging prepares high-speed rail sound barrier aluminium strip, wherein cleaning trimming, slitting rewind and Check that routinely technique carries out packaging, it is characterized in that：
1) melting aluminum melt：
By the electrolytic aluminium liquid of 70~80% parts by weight and 10~20% parts by weight and the aluminium ingot and aluminium of aluminium content >=99.7% Alloy solid waste material is put into progress melting in smelting furnace and prepares aluminum melt together, and melting Control for Kiln Temperature is in 750 ± 5 DEG C of ranges Interior, the chemical composition of aluminum melt should meet following table requirement after testing when melting, and require degasification, slagging-off clean and be sufficiently stirred It is even to ensure the quality of aluminum melt；
2) casting and rolling process prepares 3~5mm thickness aluminium volume：
By the bast mouth by heat safe inorganic non-metallic material machine-shaping when continuous casting, by aluminum melt equivalent, at the uniform velocity It injects in the steel band of two opposite direction rotatings, and is connected with recirculated cooling water on the outside of two steel bands, the heat in aluminum melt passes through Steel band and cooling water are pulled away, and the temperature of aluminum melt is maintained at 690 ± 10 DEG C of ranges when continuous casting, casting speed control 7~ The slab thickness of 10m/min, continuous casting are 19 ± 1mm, it is desirable that by adjusting the pressure and flow of cooling water, it is ensured that strand temperature control System is in 520~580 DEG C of ranges；
The slab of continuous casting is directly entered three tandem mills and carries out tandem rolling, and the working modulus control of the first passage 50~60% and is being rolled Inlet temperature processed control at 420~500 DEG C and outlet temperature control at 360~420 DEG C, the working modulus of the second passage is controlled 25 ~35% and rolling inlet temperature control at 330~390 DEG C and outlet temperature control at 290~360 DEG C, the processing of third passage Rate control 20~33% and inlet temperature control at 250~320 DEG C and outlet temperature control at 220~250 DEG C, through third road 3~5mm thickness aluminium volume is prepared in secondary processing, and each continuous rolling process is all made of emulsion and is lubricated and cools down；
3) cold rolling：
To the aluminium volume that 3~5mm thickness aluminium volume carries out being cold-rolled to 1.0~2.0mm thickness, each cold rolling pass allocation plan is：3.0~ 5.0mm → 2.0~3.7mm → 1.45~2.7mm → 1.0~2.0mm, the control of each cold rolling pass working modulus 24~35% it Between, each cold-rolled process requires to pay attention to the clear each deflector roll wiped in guide passage, prevents aluminium volume surface from having mark, viscous the defects of hindering, each cold The process of rolling is all made of ROLLING OIL and is lubricated and cools down.
4) finished products：
1.0~2.0mm thickness aluminium is rolled up and carries out finished products, finished products mode is：Negative pressure is removed when rising to 220 DEG C within 2 hours Oil 4 hours rises to 360 DEG C for 3 hours and keeps the temperature 35 hours, is down to 170 DEG C of heat preservations later and comes out of the stove for 1 hour, it is desirable that is examined when finished products The end face situation of 1.0~2.0mm thickness aluminium volume is looked into, checks whether securely whether end socket fixed using steel band and, be between each aluminium volume It is no to touch volume phenomenon；
1.0~2.0mm thickness aluminium volume of finished products can prepare high-speed rail sound barrier aluminium strip after slitting rewinds, through inspection The tensile strength for surveying high-speed rail sound barrier aluminium strip reaches 240~280Mpa, elongation percentage >=15% and 90 ° of bendings are not split.
Due to using technical solution as described above, the present invention to generate following good effect：
1, melting of the present invention when using the electrolytic aluminium liquid of 70~80% parts by weight and 10~20% parts by weight and aluminium content >= 99.7% aluminium ingot, which is put into together in smelting furnace, carries out melting, while by the tire packet refining techniques of high-temperature electrolysis molten aluminum and changing Into the refinery practice in smelting furnace, such as increase time of repose, short time multiple refining technique, ensure that aluminum melt quality, from And realize that directly producing continuous casting and rolling using electrolytic aluminium liquid rolls up abbreviated system.Compared with common process, the casting of aluminium ingot is eliminated Make with secondary remelting process, through measuring and calculating：Can reduce molten aluminum cast during aluminium ingot 0.4~0.5% aluminium damage and aluminium ingot it is secondary The scaling loss of 2~4% aluminium, has saved the energy in reflow process, improves production efficiency and yield rate.
2, hot with traditional direct-cooled ingot casting using continuous casting and rolling process for production directly with aluminum melt production 3~5mm thickness aluminium volume Roll process is compared, and aluminium strip prepared by Ha Ziliete continuous casting and rollings eliminates the big plate ingot casting of traditional hot rolled alloy, ingot blank saw head milling The multiple tracks links such as face reheats again, the roughing mill split rolling method of big processing capacity, it is energy-saving, reduce CO2 emission, section About cost has apparent economic benefit and social benefit.
3,5754 alloy sound barrier panel of hot rolling is cleaning between the hot rolling material of 6~8mm thickness is rolled down to 1.0~2.0mm thickness Trimming annealing is rewinded.And the high-speed rail sound barrier of the present invention is that 3~5mm thickness aluminium volume is cold rolled to 1.0~2.0mm thickness aluminium with aluminium strip Volume, can reduce 1~2 passage of cold rolling process than traditional processing technology, can be reduced while improving cold-rolling mill production efficiency 100 yuan/ton of production cost or more.
Specific implementation mode
The present invention is a kind of preparation method of high-speed rail sound barrier aluminium strip, and the present invention first closes electrolytic aluminium liquid and aluminium ingot, aluminium Golden solid waste is smelted into aluminum melt, then prepares 3~5mm thickness aluminium volume using casting and rolling process, finally by cold rolling, straightening The reasonable setting of the procedures parameter such as cleaning and finished products, shortens technological process, reduces production cost.
The total preparation method of the present invention is：Electrolytic aluminium liquid and aluminium ingot, aluminium alloy solid waste are smelted into aluminum melt → company Casting tandem rolling prepares 3~5mm thickness aluminium volume → cold rolling → cleaning trimming → finished products → slitting rewinds → and checks that packaging is prepared High-speed rail sound barrier aluminium strip, wherein cleaning trimming, slitting rewind and check that routinely technique carries out packaging.
The present invention can be explained in more detail by the following examples, not described part refers to background technology related content, The invention is not limited in the following examples, the open purpose of the present invention be intended to all variations in the protection scope of the invention and It improves.
One, melting aluminum melt：
By the electrolytic aluminium liquid of 70~80% parts by weight and 10~20% parts by weight and the aluminium ingot and aluminium of aluminium content >=99.7% Alloy solid waste material is put into progress melting in smelting furnace and prepares aluminum melt together, and melting Control for Kiln Temperature is in 750 ± 5 DEG C of ranges Interior, the chemical composition of aluminum melt should meet following table requirement after testing when melting, and require to carry out that degasification, slagging-off is clean and fully stirs It mixes uniformly to ensure the quality of aluminum melt.
Two, casting and rolling process production 4.5mm thickness aluminium volume：
By the bast mouth by heat safe inorganic non-metallic material machine-shaping when continuous casting, by aluminum melt equivalent, at the uniform velocity It injects in the steel band of two opposite direction rotatings, and is connected with recirculated cooling water on the outside of two steel bands, the heat in aluminum melt passes through Steel band and cooling water are pulled away, and the temperature of aluminum melt is maintained at 680 DEG C when continuous casting, casting speed control in 8m/min, continuous casting Slab thickness is 19mm, it is desirable that by adjusting the pressure and flow of cooling water, it is ensured that strand temperature is controlled in 540 DEG C of ranges.
The slab of continuous casting be directly entered three tandem mills carry out tandem rolling, the first passage working modulus control 50% and roll into The control of mouthful temperature at 490 DEG C and outlet temperature control at 420 DEG C, the working modulus control of the second passage is 32% and rolling entrance temperature Degree control at 390 DEG C and outlet temperature control at 330 DEG C, the control of the working modulus of third passage 33% and inlet temperature control exist 300 DEG C and outlet temperature control prepares 4.5mm thickness aluminium volume at 225 DEG C through the processing of third passage, each continuous rolling process is all made of breast Change liquid to be lubricated and cool down.
Three, cold rolling：
To the aluminium volume that 4.5mm thickness aluminium volume carries out being cold-rolled to 1.5mm thickness, each cold rolling pass allocation plan is：4.5mm→ 3.2mm → 2.2mm → 1.5mm, each cold-rolled process require to pay attention to the clear each deflector roll wiped in guide passage, prevent aluminium volume surface from having print Trace, viscous the defects of hindering, each cold-rolled process is all made of emulsion and is lubricated and cools down.
Four, the reference method of cleaning trimming is：
The each deflector roll that must be wiped clearly when trimming in guide passage is cleaned, each deflector roll is wiped clearly with alcohol or acetone, it is ensured that aluminium is rolled up Surface cannot have mark, viscous aluminium, scratch, scuffing, and end face is not allow for small broken sea of burr, turriform, scollop, scallop, edge etc., intermediate Trimming staggered floor is necessarily less than 2mm.
Water temperature hydraulic pressure and cleaning speed are controlled when cleaning, ensure cleaning quality, finished products back plate belt surface is avoided to go out Existing butter spot, while access panel belt surface whether there is the surface quality defects such as mark, bright wisp, aberration caused by rolling process.
Five, finished products：
1.5mm thickness aluminium is rolled up and carries out finished products, finished products mode is：Negative pressure oil removing 4 is small when rising to 220 DEG C within 2 hours When, it rises within 3 hours 360 DEG C and keeps the temperature 35 hours, be down to 170 DEG C of heat preservations later and come out of the stove for 1 hour, it is desirable that checked when finished products The end face situation of 1.5mm thickness aluminium volume, checks whether securely whether end socket fixed using steel band and, volume whether is touched between each aluminium volume Phenomenon.
Six, the reference method that slitting rewinds is：
Each deflector roll in guide passage must be wiped when rewinding clearly, each deflector roll is wiped clearly with alcohol or acetone；Ensure that aluminium rolls up surface Cannot there are mark, viscous aluminium, scratch, scuffing, end face is smooth, no string layer, tower.
The 1.5mm thickness aluminium volume of finished products can prepare high-speed rail sound barrier aluminium strip after slitting rewinds, high after testing The tensile strength of iron sound barrier aluminium strip reaches 250Mpa, elongation percentage 18% and 90 ° of bendings are not split.
It is as follows to detect reference method：GB/T228.1-2010 according to national standards《Metal material stretching test》It is processed into 5 Times standard tensile specimen, electronics are stretching on Japanese Shimadzu AGS-X 1KN precision tension testers and carry out, tensile speed reference value For 1mm/min.According to NCCA《The curved test methods of standard T》, folding test carries out on WZJ-2 benders.
Seven, the reference method for checking and packing is：
Mainly check thickness, width when finished product inspection, must not exceed the margin of tolerance, end face must not jagged, flange, hit Wound, staggered floor must not exceed 0.5mm.For monovolume weight no more than contract requirement, compliant sleeve, material have to comply with customer requirement.
The technical solution or embodiment selected herein for the open purpose of the present invention, are presently considered to be suitable , it should be appreciated that：Belong to all changes of the embodiment in this design and the scope of the invention the present invention is intended to include all Change and improves.

Claims (1)

1. a kind of preparation method of high-speed rail sound barrier aluminium strip, the preparation method first consolidate electrolytic aluminium liquid and aluminium ingot and aluminium alloy Body waste material melting aluminum melt, then using casting and rolling process prepare 3~5mm thickness aluminium volume, finally by cold rolling → cleaning trimming → Finished products → slitting rewinds → check that packaging prepares high-speed rail sound barrier aluminium strip, wherein cleaning trimming, slitting are rewinded and examined Looking into packaging, routinely technique carries out, it is characterized in that：
1) melting aluminum melt：
By the electrolytic aluminium liquid of 70~80% parts by weight and 10~20% parts by weight and the aluminium ingot and aluminium alloy of aluminium content >=99.7% Solid waste is put into progress melting in smelting furnace and prepares aluminum melt together, and melting Control for Kiln Temperature melts within the scope of 750 ± 5 DEG C The chemical composition of aluminum melt should meet following table requirement after testing when refining, and require degasification, slagging-off clean and stir with Ensure the quality of aluminum melt；
2) casting and rolling process prepares 3~5mm thickness aluminium volume：
By the bast mouth by heat safe inorganic non-metallic material machine-shaping when continuous casting, by aluminum melt equivalent, injection at the uniform velocity In the steel band of two opposite direction rotatings, and it is connected with recirculated cooling water on the outside of two steel bands, the heat in aluminum melt passes through steel band It is pulled away with cooling water, the temperature of aluminum melt is maintained at 690 ± 10 DEG C of ranges when continuous casting, and casting speed is controlled in 7~10m/ The slab thickness of min, continuous casting are 19 ± 1mm, it is desirable that by adjusting the pressure and flow of cooling water, it is ensured that the control of strand temperature exists 520~580 DEG C of ranges；
The slab of continuous casting be directly entered three tandem mills carry out tandem rolling, the first passage working modulus control 50~60% and roll into The control of mouthful temperature at 420~500 DEG C and outlet temperature control at 360~420 DEG C, the working modulus control of the second passage 25~ 35% and rolling inlet temperature control at 330~390 DEG C and outlet temperature control at 290~360 DEG C, the working modulus of third passage Control 20~33% and inlet temperature control at 250~320 DEG C and outlet temperature control at 220~250 DEG C, through third passage 3~5mm thickness aluminium volume is prepared in processing, and each continuous rolling process is all made of emulsion and is lubricated and cools down；
3) cold rolling：
To the aluminium volume that 3~5mm thickness aluminium volume carries out being cold-rolled to 1.0~2.0mm thickness, each cold rolling pass allocation plan is：3.0~ 5.0mm → 2.0~3.7mm → 1.45~2.7mm → 1.0~2.0mm, the control of each cold rolling pass working modulus 24~35% it Between, each cold-rolled process requirement pays attention to the clear each deflector roll wiped in guide passage, prevents aluminium volume surface from having mark, gluing and hinder defect, each cold rolling Process is all made of ROLLING OIL and is lubricated and cools down；
4) finished products：
1.0~2.0mm thickness aluminium is rolled up and carries out finished products, finished products mode is：Negative pressure oil removing 4 is small when rising to 220 DEG C within 2 hours When, it rises within 3 hours 360 DEG C and keeps the temperature 35 hours, be down to 170 DEG C of heat preservations later and come out of the stove for 1 hour, it is desirable that check 1.0 when finished products The end face situation of~2.0mm thickness aluminium volume, checks whether securely whether end socket fixed using steel band and, whether touched between each aluminium volume Roll up phenomenon；
1.0~2.0mm thickness aluminium volume of finished products can prepare high-speed rail sound barrier aluminium strip after slitting rewinds, high after testing The tensile strength of iron sound barrier aluminium strip reaches 240~280MPa, elongation percentage >=15% and 90 ° of bendings are not split.
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