CN103205608B - Preparation method of rare earth aluminum-manganese alloy foil used for aluminum honeycomb panel core - Google Patents
Preparation method of rare earth aluminum-manganese alloy foil used for aluminum honeycomb panel core Download PDFInfo
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Abstract
The invention discloses a rare earth aluminum-manganese alloy foil used for an aluminum honeycomb panel core and a preparation method thereof. The alloy foil uses Al-Mn alloy as basis, and comprises chemical compositions by mass percent: less than or equal to 0.3 % of Si, less than or equal to 0.6 % of Fe, 0.12-0.18 % of Cu, 1.1-1.4 % of Mn, 0.10-0 .25 % of La, less than or equal to 0.01 % of Mg, less than or equal to 0.03 % of Zn, less than or equal to 0.05 % of Ti, and the balance being Al. The preparation method uses a continuous roll-casting method, and comprises firstly producing casting rolls, secondly rolling the casting rolls, and annealing by using a furnace gas temperature control way. The invention provides a rare earth aluminum-manganese alloy foil which is uniform in crystal grain and high in intensity, and does not has intergranular corrosion and segregation; the preparation method combines casting and rolling, and thus improves compactness of metal organization, eliminates defects of shrinkage cavity and loosening, reduces segregation, eliminates head and tail cutting, increases a yield by more than 15 %, realizes continuous and automatic casting-rolling production, and shortens production period.
Description
Technical field
The present invention relates to the manufacture field of aluminum alloy materials and aluminum alloy plate materials, be specifically related to a kind of rare-earth-Al-Mn alloy paper tinsel for aluminum honeycomb panel core and preparation method thereof.
Background technology
Honeycomb aluminum sheet material has anti-high blast, damping, and the premium properties such as sound insulation, insulation, fire-retardant and intensity are high is the light material of current every profession and trade and construction industry first-selection.At present, the aluminum honeycomb panel output of China increases by geometric progression, and alumal paper tinsel is the critical material of manufacturing honeycomb aluminum plate plate core, and the operation of rolling that the mode of production of alumal paper tinsel adopts is always mainly to use hot rolling blank and cold paper tinsel to roll processing.Because alumal belongs to not heat-treatable strengthened alloy, manganese has certain strengthening effect, and along with the increase of manganese content, alloy strength improves, but the solubleness of manganese in aluminium is less, and mainly the formal distribution with MnAl6 forms corrosion nucleus in aluminum substrate.Its manganese too high levels, by separating out thick MnAl6 phase, easily causes non-uniform corrosion and segregation.And the general hot rolling blank that adopts is produced aluminum honeycomb panel core alumal paper tinsel at present, the hot rolling blank processing link technique of the method need be passed through the links such as fusion-casting process (comprising batching, fusing, refining, casting, milling face, homogenizing processing) and course of hot rolling, its process-cycle is long, and tooling cost is high.
Summary of the invention
One of object of the present invention is to provide a kind of uniform crystal particles, can produce intergranular corrosion, segregation phenomena and high-intensity aluminum honeycomb panel core rare-earth-Al-Mn alloy paper tinsel.
Two of object of the present invention is to provide a kind of continuous casting and rolling method with short production cycle, that tooling cost is low to produce the preparation method of rare-earth-Al-Mn alloy paper tinsel for aluminum honeycomb panel core.
The object of the present invention is achieved like this: a kind of rare-earth-Al-Mn alloy paper tinsel for aluminum honeycomb panel core, the Al-Mn of take is associated gold as basis, and the Chemical Composition mass percent of described rare-earth-Al-Mn alloy paper tinsel is: Si :≤0.3%, Fe :≤0.6%, Cu:0.12 ~ 0.18%, Mn:1.1 ~ 1.4%, La:0.10-0.25%, Mg :≤0.01%, Zn :≤0.03%, Ti :≤0.05%, surplus is Al.
Preferred technical scheme is that the Chemical Composition massfraction of described rare-earth-Al-Mn alloy paper tinsel is: Si:0.18 ~ 0.26%, Fe:0.40 ~ 0.55%, Cu:0.13 ~ 0.17%, Mn:1.15 ~ 1.35%, La:0.13-0.23%, Mg :≤0.01%, Zn :≤0.03%, Ti :≤0.05%, surplus is Al.
Above-mentioned element is brought into play effect separately in casting, homogenizing annealing process.
Si can reduce the solubleness of manganese in aluminium, and Si forms intermetallic compound T phase (Al10Mn2Si) in alumal of the present invention, makes the Plasticity Decreasing of alloy.Can there is eutectic α+T+Si in (approximately more than 0.1%) when silicone content is not high, but when Fe >=0.2%, and during Fe >=Si, the crack tendence of alloy sharply declines.
Fe has two impacts to the tissue of the special-purpose alumal of electrolytic condenser of the present invention: one, as long as there is micro-Fe to exist, just the solubleness of Mn in aluminium will be reduced significantly, grain segregation is reduced, therefore improve Fe content and can prevent from occurring texture of coarse crystal after alumal annealing of the present invention; Its two, the manganese atom in Al6Mn can be replaced half and form compound (FeMn) Al6 by iron atom, makes intensity and the Plasticity Decreasing of alumal of the present invention.
The solid solution of a Cu part is in aluminum substrate, and a part is separated out with the form of intermetallic compound CuAl2.The electropotential of copper is higher than aluminium.Copper and the CuAl2 of solid solution become corrosion nucleus.Copper has certain strengthening effect.When copper content is typically chosen in 0.05%～0.2% scope, be highly profitable.Cu can reduce crystal boundary and intracrystalline potential difference, can suppress intergranular crack trend, improves Alloy Anti stress corrosion performance.
The solubleness of Mn in aluminium is less, and mainly the formal distribution with MnAl6 forms corrosion nucleus in aluminum substrate.Manganese content is too low, and the compound MnAl6 separating out is few; Manganese too high levels, will separate out thick MnAl6 phase.Mn can improve the recrystallization temperature of aluminium, and the remarkable refinement recrystal grain of energy, Mn solid solution is in aluminium, can improve 20 ~ 100 ℃ of recrystallization temperatures, and by Mn Al6 dispersoid particle, hinder recrystal grain and grow up, Mn Al6 is and the phase of Al-Mn solid solution phase balance, and it is except putting forward heavy alloyed intensity, and outer another vital role of refinement recrystal grain is exactly can dissolved impurity iron.Form Al6(Fe, Mn), the impact of the phase compound that reduces FeAl3 spiculation and Al-Mn solid solution phase balance on mechanical property, the plasticity of maintenance alloy.Manganese has certain strengthening effect, and along with the increase of manganese content, alloy strength improves.
Mg can improve alloy strength, refinement recrystallized structure, but can reduce the half-finished surface gloss of annealing.Simultaneously because Mg very easily forms MgSi2 phase with Si, at this moment Fe forms (Fe Mn) Al6 alloy and is harmful in alloy.Therefore Mg content should be controlled in 0.01% scope in electrolytic condenser special metals of the present invention.
Low-alloyed corrosion stability can fall in Zn, therefore, zinc should be controlled at≤0.03% scope in.
Ti is interpolation element conventional in aluminium alloy, with the thread form of AlTi5B, add Al melt, form Al3Ti and B2Ti phase compound, non-spontaneous core while becoming crystallization, play the effect of refinement Microstructure of roll casting, in recrystallization annealing process, play the effect of secondary recrystallization grain nucleation, the raising of favourable alloy plasticity.
Rare earth has been mainly rotten and cleaning action in aluminum silicon alloy.La has strong metamorphism, and rotten ability and its atomic radius of lanthanon have close relationship, in order to change the crystallization condition of alloy, its tissue and performance is improved.Atomic radius 0.174～the 0.204mm of lanthanide series rare-earth elements, is greater than aluminium atomic radius (0.143mm).Lanthanide series rare-earth elements is more active, it is fused in aluminium liquid, very easily fill up the surface imperfection of alloy phase, thereby reduce the surface tension on new and old two-phase interface, the speed of nucleus growth is increased, also between crystal grain and aluminium alloy, form surface-active film simultaneously, stop the grain growth generating, make the structure refinement of alloy.In addition, the compound that aluminium and rare earth form is as external crystallization nucleus when molten metal crystallization, and because rolling up of nucleus number makes the structure refinement of alloy, rare earth has good modification effect to aluminium alloy.Rare earth also has strengthening effect in aluminium alloy, mainly contains the second-phase strengthening of refined crystalline strengthening, limited solution strengthening and rare earth compound etc.Along with rare earth element adds, intensity, the plasticity of aluminium alloy all increase.This mainly has benefited from the improvement of rare earth element alloy tissue and the strong precipitation strengthening effect of the rare earth compound of disperse etc.Add rare earth element and can cause crack initiation position and expansion approach in alloy fracture process to change, be conducive to the malleableize of alloy.In while aluminium alloy, with the increase of content of rare earth, tensile strength, hardness improve, and unit elongation slightly declines.Follow as can be seen here adding of rare earth, the mechanical property of alloy is improved greatly and improves.
Aluminium and alloy thereof are in fusion-casting process, and a large amount of gas can dissolve in aluminium liquid, are mainly wherein hydrogen (accounting for 85 % of gas in aluminium liquid), are secondly oxygen and nitrogen.The source of hydrogen is mainly the steam in furnace charge, the greasy dirt in aluminium ingot and scrap stock, water, and " aluminium the rust "-Al (OH) on aluminium ingot surface
3.Hydrogen is in aluminium founding, to produce the major cause of pin hole, and significantly reduces the intensity of aluminium.Rare earth joins in aluminium and alloy thereof all can play outgassing.When rare earth adding quantity is during lower than 0.3 %, the dehydrogenation effect of rare earth is the most obvious, and the amplitude that reduces of pin hole rate is also maximum.Dehydrogenation effect is from addition, and when rare earth adding quantity is during lower than 0.3 %, the dehydrogenation effect of rare earth is the most obvious, and the amplitude that reduces of pin hole rate is also maximum.After the content of rare earth is greater than 0.3 %, when content of rare earth increases, hydrogen richness declines and slows down.If use La single rare earth,, when content of rare earth surpasses 0.3 %, the increase of content of rare earth makes hydrogen richness start again to rise on the contrary, and the variation of pin hole rate also has same rule, but rangeability is more obvious.Therefore,, from addition, single rare earth content is advisable to be less than 0.3 %.
Aluminum honeycomb panel core requires aluminium foil homogeneous microstructure, chemical composition narrow range, smooth without wave, neatly little without burr, thickness deviation scope without hole pin hole, end face with rare-earth-Al-Mn alloy paper tinsel, tensile strength > 250Mpa, these requirements need to be carried out strict control to whole production process, emphasis to do a good job of it the control of continuous casting and rolling and cold paper tinsel rolling link.Guarantee reaches intensity H19 and the excellent alloy foil of toughness completely, make it to add to adopt again man-hour at the follow-up finished product of aluminum honeycomb panel to cohere glue, two component polyurethane high temperature setting glue, with automatic honeycomb plate composite production device, by pressurized high-temperature, be composited, overcome the fragility problem of perforated plate adhesive linkage in the past.And make internal layer be designed to special hexagon aluminium honeycomb, as the central layer sticking in sandwich structure, on tangential, bear pressure.These dense cellular that mutually pin down are just as many little I-beams, dispersible the pressure of bearing from panel direction, make plate stressed evenly, guaranteed that panel still can keep very high planeness when larger area, thereby made rare-earth-Al-Mn alloy paper tinsel reach the high-intensity technical requirements of aluminum honeycomb panel core.
Because sosoloid uneven components easily appears when the casting in rare-earth-Al-Mn alloy paper tinsel Casting Rolled Sheet band, be prone to texture of coarse crystal and grain segregation phenomenon, therefore when being rolled down to 5.0mm, must carry out high temperature homogenizing annealing, make Solid solution decomposition, be settled out MnAl6 particle, reduce recrystallization temperature, prevent that coarse-grain from occurring, reaches the desired result of organizing crystal grain fine and closely woven.
The preparation method of this rare-earth-Al-Mn alloy paper tinsel, step is as follows:
S1: production casting volume, the Chemical Composition mass percent of casting coiled material is: Si :≤0.3%, Fe :≤0.6%, Cu:0.12 ~ 0.18%, Mn:1.1 ~ 1.4%, La:0.10-0.25%, Mg :≤0.01%, Zn :≤0.03%, Ti :≤0.05%, surplus is Al.
S2: described casting is twisted in to cold rolling being rolled, when being rolling to 5.0mm thickness, carry out annealing process, when continuing to be rolling to 0.3mm, then turn paper tinsel and roll and be rolling to again desired thickness;
Described annealing process adopts high temperature homogenizing annealing, and technique is: adopt the annealing of furnace gas temperature control method, that is, furnace temperature≤100 ℃ shove charge, is warmed up to 600 ℃ through 2 hours furnace temperature, is incubated 25 hours; Again furnace temperature was cooled to 370 ℃ of air coolings of coming out of the stove through 4 hours.
The technical process (S1) of casting volume is: smelting furnace preparations → furnace charge preparation → shove charge → melt → the stir continuous casting and rolling plate that becomes 7.0mm with processing (refining for the first time) → converter and the filter cleaner → casting of standing skim → strumbox of (refining for the second time) → degasification tank degasification two channels twin-stage ceramic filter plate in skim → adjusting component → stove, then be wound into casting volume (that is: Casting Rolled Sheet band), wherein furnace charge in preparing to the regulation of waste material is: it is fine aluminium group that waste material is used 1XXX, total input amount≤35%(of waste material wherein secondary waste material answers≤30%), virgin aluminium ingot >=65%.
Preferred technical scheme is: in S2 step, the order of rolling is: continuous casting and rolling plate → 5.0mm → annealing process → 2.3mm → 1.5mm → 1.0mm → 0.65mm → 0.43mm → 0.3mm(of 7.0mm turns paper tinsel and rolls) → 0.19mm → 0.13mm → 0.09mm → 0.059mm → finished product: 0.04mm.
Preferred technical scheme is: during the production of casting volume, mill roll-gap is decided to be 4.9-5.0mm; Front case liquid level is defined as 16 ± 1mm; The length in casting district is 54-56mm; Roll casting speed is 0.750m/min-0.95m/min; Teeming temperature is 695 ℃-700 ℃; Rolling load is 800-980t.
Preferred technical scheme is: mobile cooling water flow: 70-100t/h in roll cover for cast roll, pressure: 3-5kg/cm
2, enter water temp≤30 ℃, inlet/outlet temperature difference requirement≤3 ℃.
Preferred technical scheme is: cold-rolling mill rolling uncoiling tension value setting range is that 0.8-2.4Kg/mm2, coiling tension setting range 1.4-3.4Kg/mm2, roll speed setting range are 140-430M/min; Foil mill rolling uncoiling scope is that 2.9-3.4Kg/mm2, coiling tension are that 3.5-4.1Kg/mm2, roll speed are 400-700M/min.
Preferred technical scheme is: in cold rolling, ROLLING OIL oil pressure is 4.2-4.48kg, and oil temperature is 29-37 ℃; During paper tinsel rolls, ROLLING OIL oil pressure is that 4.45-4.46kg, oil temperature are 40-45 ℃.
Preferred technical scheme is: cold-rolling process oil physical and chemical index: flash-point>=95 ℃, kinematic viscosity 2.2-2.5(40 ℃) mm
2/ s; Acidity≤0.05mg.KOH/g; The main physical and chemical index of paper tinsel roll process oil: flash-point>=80 ℃, kinematic viscosity 1.8-2.0(40 ℃) mm
2/ S, acidity≤0.1mg.KOH/g.
Described annealing process is for adopting high temperature homogenizing annealing, and technique is: adopt the annealing of furnace gas temperature control method, that is, furnace temperature≤100 ℃ shove charge, furnace temperature is warmed up to 600 ℃, is incubated 25 hours; Again furnace temperature was cooled to 370 ℃ of air coolings of coming out of the stove through 4 hours.High-temperature homogenization is processed can effectively eliminate dendritic segregation, dissolve non-equilibrium phase, makes metal structure be tending towards homogenizing, and this will, to the uniform microstructure texture of the final formation of aluminum foil finished product, prevent that the mechanical property causing because of tissue odds is unstable significant.
Described cast-rolling aluminum band rolls after high temperature homogenizing annealing that 0.04mm (or 0.05mm, 0.06mm, 0.07mm and 0.074mm) thickness general working rate is that 99.2%(0.05mm general working rate is 99.0%, 0.06mm general working rate is 98.8%, 0.07mm general working rate is 98.6%, 0.074mm general working rate is 98.52%).
Aluminum honeycomb panel core uses rare-earth-Al-Mn alloy paper tinsel due to its special use, thereby relatively high to the requirement of processing quality.Require aluminium foil homogeneous microstructure, chemical composition narrow range, smooth without wave, without neat, the length scaling little without burr, thickness deviation scope etc. of hole pin hole, end face.The present invention carries out strict control according to above requirement to whole production process, and emphasis is for continuous casting and rolling and control cold, paper tinsel rolling link.
1, the control of aluminum honeycomb panel core rare-earth-Al-Mn alloy fusion process
Batching is the important step that guarantees chemical composition stability.Throw furnace charge and guarantee cleaning, without inclusiones such as silt, sleet; The new metal of every heat is relative fixing with the ratio of returns; Throw stokehold and calculate in detail the content range of controlled alloying element and impurity, guarantee the accuracy of food ingredient.
Fusing is the most direct on the impact of the chemical composition of the finished product, hole and pin hole quantity with refining.During fusing, should avoid melt overheat, in case the solidity to corrosion of product is produced to detrimentally affect; Need the alloy of composition adjustment to melt after complete primary sample at basic aluminium material, then carry out composition adjustment, and should fully stir, to guarantee that alloying constituent is even; Strictly control and remove gas and inclusion in melt, most important to hole and the needle pore defect of minimizing aluminum foil finished product, generally should guarantee that melt hydrogen richness is less than 0.15mL/ (100gAl), the elimination factor of 20 μ m level inclusiones is not less than 60%.2, the control of aluminum honeycomb panel core rare-earth-Al-Mn alloy continuous casting and rolling process
(1) control of casting working procedure parameter
On whole continuous casting and rolling production line, critical process is casting.In this procedure, by melt, to casting, becoming the process of solid metal made-up belt is to complete in very little casting district.For stable, carry out continuous casting and rolling, many processing parameters must be worked good.Main processing parameter has: intermesh determination, front case liquid level, teeming temperature, roll, roll casting speed, cooling intensity and solidify the molten aluminium of moment and supply with required static pressure etc.Between them, exist close inner link.Under the normal roll casting conditions certain in roller footpath, made-up belt thickness is certain, any one changes these processing parameters to some extent, other also to, along with change, just can guarantee the stable stability of casting.In mutual variation relation between them, there is a basic law, while adjusting being related between each processing parameter, should make the height of solidification zone and distorted area have certain proportionlity, to keep absolute draft amount constant, just can guarantee stability and the continuity of strip casting process, make made-up belt there is good healthy tissues.
1), aluminum honeycomb panel core rare-earth-Al-Mn alloy paper tinsel base product design thickness of slab 7mm, it is very crucial that gap values between rollers is set, and through technological test mill roll-gap repeatedly, is decided to be 4.9-5.0mm.
2), the determining of front case liquid level: in casting region, the melt that solidifies moment is supplied with and keeps required pressure, is all that the static pressure by front case melt level controls.In principle, guaranteeing that under the condition that bath surface oxide film is not destroyed, front case liquid level is more high better.Because now the melt in liquid cave is large to the pressure of crystal plane, can not only guarantees the continuity of melt solidifying, and can obtain fine and close tissue.Through experiment with measuring repeatedly, front case liquid level during aluminum-manganese alloy casting is defined as: 16 ± 1mm.
Aluminum honeycomb panel core rare-earth-Al-Mn alloy contains compared with Gao Meng, and viscosity is large, and teeming temperature is very important.Teeming temperature should be stablized, and should not fluctuate, simultaneously also unsuitable too high.Too highly fixed, bad shaping or make made-up belt Quality Down, too lowly fixed, melt even can solidify in gating system.Teeming temperature and roll casting speed are inversely proportional to.Therefore,, through test of many times and teeming temperature demonstration, teeming temperature is defined as the most at last: 695 ℃-700 ℃.
3), roll is set
Aluminum honeycomb panel core rare-earth-Al-Mn alloy is owing to containing higher manganese, and the two-phase region scope being comprised of solid phase and liquid phase is large, solidifies the required time completely long.Therefore, must strengthen the length in casting district, we adopt * 1600 supertype casting and rolling machines to produce, and can obtain larger casting district and condensing condition faster, and roll is the important parameter in casting-rolling technology.Therefore, finally we are decided to be 54-56mm through test of many times by casting district.
4), rolling force setup
Because aluminum honeycomb panel core rare-earth-Al-Mn alloy contains higher manganese, intensity is large, and resistance to deformation is large, and rolling load is large.Therefore, casting and rolling machine preload force is set extremely important, for the Casting Rolled Sheet gap values between rollers that makes to produce keeps constant, to improve the stability of Casting Rolled Sheet thickness, prevents longitudinal thickness fluctuation.
Final setting rolling load is 800-980t.
5), that aluminum honeycomb panel core rare-earth-Al-Mn alloy paper tinsel base roll casting speed is set alumal two-phase region scope is large, solidifies required time completely long, therefore, roll casting speed is the key parameter of decision casting condensing condition, through testing us, takes slower roll casting speed:
0.750m/min-0.95m/min。
6), for increasing cooling intensity, mobile cooling water flow: 70-100t/h in roll cover for cast roll, pressure: 3-5kg/c ㎡, enter water temp≤30 ℃, inlet/outlet temperature difference requirement≤3 ℃.
By continuous casting and rolling method, produce the two procedures that aluminum honeycomb panel core rare-earth-Al-Mn alloy paper tinsel base band plate completes casting and rolling on a casting and rolling machine simultaneously, produce and compare with hot rolling method, saved ingot casting sawing end to end, the operations such as milling face, heating cogging and hot rolling, saved mass energy, reduced the remelting of waste material, lumber recovery improves 15% than hot rolling.Process cost per ton are lower 1000 yuan than hot rolling method, and good plate cut, even thickness, good processability.
(2) to the control of the parameter of cold paper tinsel roll process (comprising mill milling pass reduction, rolling tensile force, roll speed, cooling lubricant (rolling technology oil), roll profile design etc.).
1), cold-rolling mill design rolling pass is 7 passages, absolute draft amount is 6.7mm, general working rate is 95.71%; Foil mill rolling pass is (4-) 5 passages, and absolute draft amount is 0.26mm, and general working rate is 86.66%; It is 12 passages that cold paper tinsel rolls total processing passage, and absolute draft amount is 6.96mm, and general working rate is 99.43%.
2) cold-rolling mill rolling uncoiling tension value is determined between 0.8-2.4Kg/mm2 because of thickness, and coiling tension is determined between 1.4-3.4Kg/mm2; Roll speed is controlled between 140-430M/min according to each passage thickness, tension force etc., cold rolling used time 68min; Foil mill rolling uncoiling tension value is because thickness is between 2.9-3.4Kg/mm2, and coiling tension is between 3.5-4.1Kg/mm2; Roll speed is controlled between 400-700M/min according to each passage thickness, tension force etc., paper tinsel rolling used time 253min, and cold paper tinsel rolls the total used time 321min of rolling.
3) cold-rolling mill passage roller milling roller roll forming: convexity: 0.02mm; Roughness: cogging shaping roll 0.40-0.50 μ m, optimum value 0.45 μ m; Middle finishing roll 0.26-0.35 μ m, optimum value 0.30 μ m;
Foil mill passage rolling shaping roll roll forming: convexity: 0.06mm; Roughness: 0.18-0.22 μ m, optimum value 0.20 μ m.Middle roll forming of the roll: convexity: 0.07mm; Roughness: 0.08-0.12 μ m, optimum value 0.10 μ m.
4) cold rollingly because rolling pass is different, ROLLING OIL oil pressure is controlled to 4.2-4.48 kg, oil temperature and controls the 29-37 ℃ of main physical and chemical index of cold-rolling process oil: flash-point >=95 ℃; Kinematic viscosity 2.2-2.5 (40 ℃) m ㎡/S; Acidity≤0.05mg.KOH/g.Paper tinsel rolls because rolling pass is different ROLLING OIL oil pressure is controlled to 4.45-4.46kg, 40-45 ℃ of main physical and chemical index of cold-rolling process oil of oil temperature control: flash-point >=80 ℃; Kinematic viscosity 1.8-2.0(40 ℃) m ㎡/S; Acidity≤0.1mg.KOH/g.
5) described annealing process is for adopting high temperature homogenizing annealing, and technique is: adopt the annealing of furnace gas temperature control method, that is, furnace temperature≤100 ℃ shove charge, furnace temperature is warmed up to 600 ℃, is incubated 25 hours; Again furnace temperature was cooled to 370 ℃ of air coolings of coming out of the stove through 4 hours.
On can adopt * 1600 supertype casting and rolling machines of the present invention, produce the continuous casting process of aluminum honeycomb panel core rare-earth-Al-Mn alloy Casting Rolled Sheet, can guarantee the smooth production of rare-earth-Al-Mn alloy Casting Rolled Sheet, replace the production method of producing alumal slab by hot rolling method, have advantages of that yield rate is high, cost is low, good plate cut, even thickness, good processability.
Aluminum honeycomb panel core rare-earth-Al-Mn alloy paper tinsel of the present invention, carries out 600 ℃ of homogenizing annealings by 5.0mm thickness calendering Strip.Make Al6(Fe, Mn), CuAl2, Al6Mn, T phase (Al10Mn2Si), MgSi2 compound take crystal particle crystal boundary that Al3Ti and B2Ti phase compound be core disperse educt around, make alloy there is the feature of higher tensile strength, yield strength and unit elongation, this alloy after aluminium strip processing each trimmed size general working rate for not being 99.2%, 99.0%, 98.8%, 98.6%, 98.52%.
Above cold deformation, crystal grain obtains abundant fragmentation, recrystal grain along maximum main transformer shape developing direction be elongated, drawing-down, form the uniform Deformation structure of surface color, thereby guaranteed high-strength mechanical properties and the great surface quality of aluminum honeycomb panel core rare-earth-Al-Mn alloy paper tinsel.
Feature of the present invention is as follows:
1, adopt continuous casting and rolling method (so-called continuous casting and rolling is directly liquid metal " rolling " to be become to finished product or half-finished technique) that liquid metal is once become to base or becomes a useful person, shortened Production Flow Chart, simplify production process, saved a large amount of facility investments and energy consumption.Its equipment is simple, concentrates, and has saved the multiple working procedures such as ingot casting, sawing, milling face, heating, hot rolling, and expense is only 1/20 of equipment of hot rolling, and energy consumption is only 20% of hot rolling conventional production methods.
2, continuous casting and rolling speed of cooling reaches 100-1000K/s, therefore Casting Rolled Sheet dendrite interval 5-10 μ m only, metal compound particles is 1-2 μ m, the degree of supersaturation of solute element in sosoloid improves greatly, make tensile strength and the yield strength of Casting Rolled Sheet improve 10%-20%, recrystallization temperature improves tens to 100 ℃.
3, rare earth element joins the effect that can play microalloying in aluminium alloy; In addition, gas and the much nonmetal stronger avidity that has such as it and hydrogen, can generate the compound that fusing point is high, therefore it has certain dehydrogenation, refining, cleaning action; Meanwhile, Rare-Earth Element Chemistry activity is extremely strong, and it can optionally adsorb on established crystal grain boundary, hinders the growth of crystal grain, and result causes grain refining, has rotten effect.
4, cast the compactness that has improved metal structure with the combination of rolling, eliminated shrinkage cavity, loose, reduced the defects such as segregation.Save cutting head cutting tail, improved lumber recovery more than 15%.
5, realize the serialization of casting-rolling production, automatization, has shortened the production cycle, is conducive to scientific management and improves work working condition.
Embodiment
Below in conjunction with embodiment, the specific embodiment of the present invention is further described.Following examples are only for technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.
embodiment 1
Rare-earth-Al-Mn alloy paper tinsel and preparation method for 0.040mm thick aluminium honeycombed sheet core
S1: production casting volume
The Chemical Composition massfraction of described casting volume is as follows: Si:0.20%, Fe:0.45%, Cu:0.15%, Mn:1.19%, La:0.18%, Mg:0.008%, Zn:0.025%, Ti:0.032%, surplus are Al.
S2: described casting is twisted in to cold rolling being rolled, when being rolling to 5.0mm thickness, carry out annealing process, when continuing to be rolling to 0.3mm, then turn paper tinsel and roll and be rolling to again desired thickness;
The technological process of production of casting volume is: smelting furnace preparations → furnace charge preparations → shove charge → melt → stir with processing (refining for the first time) → converter and the filter cleaner → casting of standing skim → strumbox of (refining for the second time) → degasification tank degasification two channels twin-stage ceramic filter plate in skim → adjusting component → stove becomes casting to roll up, wherein furnace charge in preparing to the regulation of waste material is: it is fine aluminium group that waste material is used 1XXX, total input amount≤35%(of waste material wherein secondary waste material answers≤30%), virgin aluminium ingot >=65%.
Guarantee that melt hydrogen richness is less than 0.15mL/ (100gAl), the elimination factor of 20 μ m level inclusiones is not less than 60%.
The length in casting district is 54-56mm; Roll casting speed is 800-950mm; Teeming temperature is 695-700 ℃; Cooling intensity: 30 ℃ of inlet water temperature <, hydraulic pressure: 3-5kg/cm2.
The technical process of cold paper tinsel rolling Preparation Method is: continuous casting and rolling plate → 5.0mm of 7.0mm → middle homogenizing annealing (process annealing for the first time: 600 ℃/25h-4h cools to-370 ℃ and comes out of the stove) → 2.3mm → 1.5mm → 1.0mm → 0.65mm → 0.43mm → 0.3mm(turns paper tinsel and rolls) → 0.19mm → 0.13mm → 0.09mm → 0.059mm → finished product: 0.04mm.
Described annealing process is for adopting high temperature homogenizing annealing, and technique is: adopt the annealing of furnace gas temperature control method, that is, furnace temperature≤100 ℃ shove charge, is warmed up to 600 ℃ through 2 hours furnace temperature, is incubated 25 hours; Again furnace temperature was cooled to 370 ℃ of air coolings of coming out of the stove through 4 hours.
During the production of casting volume, mill roll-gap is decided to be 4.9mm; Front case liquid level is defined as 16 ± 1mm; The length in casting district is 56mm; Roll casting speed is 0.850m/min; Teeming temperature is 695 ℃-700 ℃; Rolling load is 800-980t.
Mobile cooling water flow: 80t/h in roll cover for cast roll, pressure: 5kg/cm3, inflow temperature is 30 ℃, inlet/outlet temperature difference requirement is 3 ℃.
Cold-rolling mill rolling uncoiling tension value setting range is that 0.8-2.4Kg/mm2, coiling tension setting range 1.4-3.4Kg/mm2, roll speed setting range are 140-430M/min; Foil mill rolling uncoiling scope is that 2.9-3.4Kg/mm2, coiling tension are that 3.5-4.1Kg/mm2, roll speed are 400-700M/min.
In cold rolling, ROLLING OIL oil pressure is 4.2-4.48kg, and oil temperature is 29-37 ℃; During paper tinsel rolls, ROLLING OIL oil pressure is that 4.45-4.46kg, oil temperature are 40-45 ℃.
Cold-rolling process oil physical and chemical index: 95 ℃ of flash-points, kinematic viscosity 2.5(40 ℃) mm
2/ s; Acidity 0.05mg.KOH/g; The main physical and chemical index of paper tinsel roll process oil: 80 ℃ of flash-points, kinematic viscosity 2.0(40 ℃) mm
2/ S, acidity 0.1mg.KOH/g.
embodiment 2
0.060mm thick aluminium honeycombed sheet core rare-earth-Al-Mn alloy paper tinsel.
S1: production casting volume
The Chemical Composition massfraction of described casting volume is as follows: Si:0.21%, Fe:0.50%, Cu:0.14%, Mn:1.28%, La:0.16%, Mg:0.01%, Zn:0.01%, Ti:0.05%, surplus are Al.
S2: described casting is twisted in to cold rolling being rolled, when being rolling to 5.0mm thickness, carry out annealing process, when continuing to be rolling to 0.3mm, then turn paper tinsel and roll and be rolling to again desired thickness;
The technological process of production of casting volume is: smelting furnace preparations → furnace charge preparations → shove charge → melt → stir with processing (refining for the first time) → converter and the filter cleaner → casting of standing skim → strumbox of (refining for the second time) → degasification tank degasification two channels twin-stage ceramic filter plate in skim → adjusting component → stove becomes casting to roll up, wherein furnace charge in preparing to the regulation of waste material is: it is fine aluminium group that waste material is used 1XXX, total input amount≤35%(of waste material wherein secondary waste material answers≤30%), virgin aluminium ingot >=65%.
Guarantee that melt hydrogen richness is less than 0.15mL/ (100gAl), the elimination factor of 20 μ m level inclusiones is not less than 60%.
The length in casting district is 54-56mm; Roll casting speed is 800-950mm; Teeming temperature is 695-700 ℃; Cooling intensity: 30 ℃ of inlet water temperature <, hydraulic pressure: 3-5kg/cm2.
The technical process of cold paper tinsel rolling Preparation Method is: continuous casting and rolling plate → 5.0mm of 7.0mm → middle homogenizing annealing (process annealing for the first time: 600 ℃/25h-4h cools to-370 ℃ and comes out of the stove) → 2.3mm → 1.5mm → 1.0mm → 0.65mm → 0.43mm → 0.3mm(turns paper tinsel and rolls) → 0.19mm → 0.13mm → 0.09mm → finished product: 0.06mm
Described annealing process is for adopting high temperature homogenizing annealing, and technique is: adopt the annealing of furnace gas temperature control method, that is, furnace temperature≤100 ℃ shove charge, is warmed up to 600 ℃ through 2 hours furnace temperature, is incubated 25 hours; Again furnace temperature was cooled to 370 ℃ of air coolings of coming out of the stove through 4 hours.
During the production of casting volume, mill roll-gap is decided to be 5.0mm; Front case liquid level is defined as 16 ± 1mm; The length in casting district is 56mm; Roll casting speed is 0.95m/min; Teeming temperature is 700 ℃; Rolling load is 950t.
Mobile cooling water flow: 70t/h in roll cover for cast roll, pressure: 3kg/cm3,30 ℃ of inflow temperatures, 3 ℃ of inlet/outlet temperature difference requirement.
Cold-rolling mill rolling uncoiling tension value setting range is that 0.8-2.4Kg/mm2, coiling tension setting range 1.4-3.4Kg/mm2, roll speed setting range are 140-430M/min; Foil mill rolling uncoiling scope is that 2.9-3.4Kg/mm2, coiling tension are that 3.5-4.1Kg/mm2, roll speed are 400-700M/min.
In cold rolling, ROLLING OIL oil pressure is 4.2-4.48kg, and oil temperature is 29-37 ℃; During paper tinsel rolls, ROLLING OIL oil pressure is that 4.45-4.46kg, oil temperature are 40-45 ℃.
Cold-rolling process oil physical and chemical index: 100 ℃ of flash-points, kinematic viscosity 2.4(40 ℃) mm
2/ s; Acidity 0.05mg.KOH/g; The main physical and chemical index of paper tinsel roll process oil: 90 ℃ of flash-points, kinematic viscosity 2.0(40 ℃) mm
2/ S, acidity 0.1mg.KOH/g.
embodiment 3
0.074mm thick aluminium honeycombed sheet core rare-earth-Al-Mn alloy paper tinsel.
S1: production casting volume
The Chemical Composition massfraction of described casting volume is as follows: Si:0.20%, Fe:0.47%, Cu:0.15%, Mn:1.27%, La:0.23%, Mg:0.01%, Zn:0.02%, Ti:0.03%, surplus are Al.
S2: described casting is twisted in to cold rolling being rolled, when being rolling to 5.0mm thickness, carry out annealing process, when continuing to be rolling to 0.3mm, then turn paper tinsel and roll and be rolling to again desired thickness;
The technological process of production of casting volume is: smelting furnace preparations → furnace charge preparations → shove charge → melt → stir with processing (refining for the first time) → converter and the filter cleaner → casting of standing skim → strumbox of (refining for the second time) → degasification tank degasification two channels twin-stage ceramic filter plate in skim → adjusting component → stove becomes casting to roll up, wherein furnace charge in preparing to the regulation of waste material is: it is fine aluminium group that waste material is used 1XXX, total input amount≤35%(of waste material wherein secondary waste material answers≤30%), virgin aluminium ingot >=65%.
Guarantee that melt hydrogen richness is less than 0.15mL/ (100gAl), the elimination factor of 20 μ m level inclusiones is not less than 60%.
The length in casting district is 54-56mm; Roll casting speed is 800-950mm; Teeming temperature is 695-700 ℃; Cooling intensity: 30 ℃ of inlet water temperature <, hydraulic pressure: 3-5kg/cm2.
The technical process of cold paper tinsel rolling Preparation Method is: continuous casting and rolling plate → 5.0mm of 7.0mm → middle homogenizing annealing (process annealing: 600 ℃/25h-4h cools to-370 ℃ and comes out of the stove) → 2.3mm → 1.5mm → 1.0mm → 0.65mm → 0.41mm → 0.27mm(turns paper tinsel and rolls) → 0.175mm → 0.11mm → finished product: 0.074mm
Described annealing process is for adopting high temperature homogenizing annealing, and technique is: adopt the annealing of furnace gas temperature control method, that is, furnace temperature≤100 ℃ shove charge, is warmed up to 600 ℃ through 2 hours furnace temperature, is incubated 25 hours; Again furnace temperature was cooled to 370 ℃ of air coolings of coming out of the stove through 4 hours.
During the production of casting volume, mill roll-gap is decided to be 5.0mm; Front case liquid level is defined as 16 ± 1mm; The length in casting district is 54mm; Roll casting speed is 0.750m/min; Teeming temperature is 700 ℃; Rolling load is 800t.
Mobile cooling water flow: 70t/h in roller shell, pressure: 5kg/cm3,30 ℃ of inflow temperatures, 3 ℃ of inlet/outlet temperature difference requirement.
Cold-rolling mill rolling uncoiling tension value setting range is that 0.8-2.4Kg/mm2, coiling tension setting range 1.4-3.4Kg/mm2, roll speed setting range are 140-430M/min; Foil mill rolling uncoiling scope is that 2.9-3.4Kg/mm2, coiling tension are that 3.5-4.1Kg/mm2, roll speed are 400-700M/min.
In cold rolling, ROLLING OIL oil pressure is 4.2-4.48kg, and oil temperature is 29-37 ℃; During paper tinsel rolls, ROLLING OIL oil pressure is that 4.45-4.46kg, oil temperature are 40-45 ℃.
Cold-rolling process oil physical and chemical index: 95 ℃ of flash-points, kinematic viscosity 2.2-2.5(40 ℃) mm
2/ s; Acidity 0.05mg.KOH/g; The main physical and chemical index of paper tinsel roll process oil: 80 ℃ of flash-points, kinematic viscosity 1.9(40 ℃) mm
2/ S, acidity 0.1mg.KOH/g.
The aluminum honeycomb panel core rare-earth-Al-Mn alloy paper tinsel that the present invention produces meets following the key technical indexes and is:
A), alloy state: H19
B), dimensions and permissible variation:
Thickness * width * length: 0.04 ~ 0.074 ± 0.01 * 150-1200 ± 1 * ￠ 300-600 ± 20mm(coil diameter) mm,
C) mechanical property: tensile strength: > 250 Mpa, unit elongation: >=1%;
D) surface is clean, color and luster is even, without hole pin hole, without wipe scuffing, folding line and damage, the defect such as gravure.
E) surface flatness should be not more than 20I.
The explanation of above-mentioned technical indicator, aluminum honeycomb panel core rare-earth-Al-Mn alloy paper tinsel is due to its special use, thereby relatively high to the requirement of continuous casting and rolling processing quality.Require aluminium foil homogeneous microstructure, study a minute narrow range, paper tinsel surface should cleaning, smooth, neatly little etc. without burr, thickness deviation scope without hole pin hole, end face.Meet these requirement needs whole production process is carried out to strict control, emphasis is done a good job of it the control of continuous casting and rolling and cold paper tinsel rolling link.The aluminium foil base material that the aluminum honeycomb panel core rare-earth-Al-Mn alloy thickness that guarantee invention is produced is 0.04-0.074mm reaches the high-intensity technical requirements of honeycombed sheet core rare-earth-Al-Mn alloy paper tinsel.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. for a preparation method for the rare-earth-Al-Mn alloy paper tinsel of aluminum honeycomb panel core, described method comprises the steps:
S1: production casting volume, the Chemical Composition mass percent of described casting coiled material is: Si :≤0.3%, Fe :≤0.6%, Cu:0.12-0.18%, Mn:1.1-1.4%, La:0.10-0.25%, Mg :≤0.01%, Zn :≤0.03%, Ti :≤0.05%, surplus is Al;
Or the Chemical Composition mass percent of described casting coiled material is: Si:0.18-0.26%, Fe:0.40-0.55%, Cu:0.13-0.17%, Mn:1.15-1.35%, La:0.13-0.23%, Mg :≤0.01%, Zn :≤0.03%, Ti :≤0.05%, surplus is Al;
S2: described casting is twisted in to cold rolling being rolled, when being rolling to 5.0mm thickness, carry out annealing process, when continuing to be rolling to 0.3mm, then turn paper tinsel and roll and be rolling to again desired thickness;
Described annealing process adopts high temperature homogenizing annealing, and technique is: adopt the annealing of furnace gas temperature control method, that is, furnace temperature≤100 ℃ shove charge, is warmed up to 600 ℃ through 2 hours furnace temperature, is incubated 25 hours; Again furnace temperature was cooled to 370 ℃ of air coolings of coming out of the stove through 4 hours.
2. preparation method according to claim 1, is characterized in that: in described step S1, the technological process of production of casting volume is: smelting furnace preparations → furnace charge preparation → shove charge → melt → stir with in skim → adjusting component → stove, process refining → converter for the first time and the filter cleaner → casting of standing skim → strumbox of the degasification of refining → degasification tank for the second time two channels twin-stage ceramic filter plate and become casting to roll up.
3. preparation method according to claim 2, is characterized in that: during the production of casting volume, mill roll-gap is decided to be 4.9-5.0mm; Front case liquid level is defined as 16 ± 1mm; The length in casting district is 54-56mm; Roll casting speed is 0.750m/min-0.95m/min; Teeming temperature is 695 ℃-700 ℃; Rolling load is 800-980t.
4. preparation method according to claim 2, is characterized in that: mobile cooling water flow: 70-100t/h in roll cover for cast roll, pressure: 3-5kg/cm
3, inflow temperature≤30 ℃, inlet/outlet temperature difference requirement≤3 ℃.
5. preparation method according to claim 1, is characterized in that: in described S2 step, the order of rolling is: continuous casting and rolling plate → 5.0mm → annealing process → 2.3mm → 1.5mm → 1.0mm → 0.65mm → 0.43mm → 0.3mm of 7.0mm; Roll → 0.19mm → 0.13mm → 0.09mm → 0.059mm → finished product: the 0.04mm that turns paper tinsel.
6. preparation method according to claim 5, is characterized in that: cold-rolling mill rolling uncoiling tension value setting range is that 0.8-2.4kg/mm2, coiling tension setting range 1.4-3.4kg/mm2, roll speed setting range are 140-430m/min; Foil mill rolling uncoiling scope is that 2.9-3.4kg/mm2, coiling tension are that 3.5-4.1kg/mm2, roll speed are 400-700m/min.
7. preparation method according to claim 5, is characterized in that: in cold rolling, ROLLING OIL oil pressure is 4.2-4.48kg, and oil temperature is 29-37 ℃; During paper tinsel rolls, ROLLING OIL oil pressure is that 4.45-4.46kg, oil temperature are 40-45 ℃.
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| CN104388761B (en) * | 2014-10-30 | 2017-06-27 | 晟通科技集团有限公司 | Aluminum alloy materials and the method that double zero foil is manufactured with it |
| CN106282704B (en) * | 2016-08-09 | 2018-10-09 | 江阴新仁铝业科技有限公司 | 1120 alloy flexibility bonded ceramic welding lining pad aluminium foils of one kind and preparation method thereof |
| CN109055828A (en) * | 2018-08-10 | 2018-12-21 | 安徽辰航新材料科技有限公司 | A kind of High-strength environmentally-friefuran Al alloy composite |
| 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 |
| CN111589861A (en) * | 2020-04-13 | 2020-08-28 | 江苏中基复合材料有限公司 | Rare earth aluminum manganese alloy sterilization foil for pet food packaging steamed fresh brick and production process thereof |
| CN111850351A (en) * | 2020-07-01 | 2020-10-30 | 吉林大学 | Method for preparing high-elongation cast-rolling Al-Mn series aluminum alloy plate blank |
| CN113061786B (en) * | 2021-03-28 | 2023-04-25 | 内蒙古中拓铝业股份有限公司 | Rare earth aluminum strip for stretch forming battery case |
| CN114318026A (en) * | 2021-12-24 | 2022-04-12 | 东北轻合金有限责任公司 | Method for manufacturing aluminum alloy foil for automobile heat shield |
| CN115725877B (en) * | 2022-11-18 | 2024-01-02 | 乳源东阳光优艾希杰精箔有限公司 | High-strength high-elongation aluminum foil and preparation method and application thereof |
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Effective date of registration: 20180108 Address after: No. 66, North Industrial Park, Xinjiang Shihezi Development Zone, Shihezi, the Xinjiang Uygur Autonomous Region Patentee after: Xinjiang Tianshan Ying Carbon Co., Ltd. Address before: 214400 Huang Tong Industrial Park, Xu Xiake Town, Jiangyin, Jiangsu, Wuxi Patentee before: Jiangyin Xinren Technology Co., Ltd. |