CN106399781B - A kind of high-strength corrosion-resisting rare earth aluminum alloy material and preparation method - Google Patents

A kind of high-strength corrosion-resisting rare earth aluminum alloy material and preparation method Download PDF

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CN106399781B
CN106399781B CN201611102414.0A CN201611102414A CN106399781B CN 106399781 B CN106399781 B CN 106399781B CN 201611102414 A CN201611102414 A CN 201611102414A CN 106399781 B CN106399781 B CN 106399781B
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aluminium
alloy
aluminium alloy
melt
alloy melt
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CN106399781A (en
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李�亨
吴玉程
闫华
张真
周士昂
李萍
黄新民
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Hefei University of Technology
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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
    • C22C21/10Alloys based on aluminium with zinc as the next major constituent
    • 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
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/06Alloys based on aluminium with magnesium as the next major constituent
    • 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
    • C22F1/002Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/047Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
    • 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
    • C22F1/053Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with zinc as the next major constituent

Abstract

The present invention provides a kind of high-strength corrosion-resisting aluminum alloy materials and preparation method.The present invention adds appropriate Cu and Rare-Earth Ce, Sc, Er element, makes a kind of new A l-Zn-Mg-Cu-Ce-Sc-Er aluminum alloy materials respectively on the basis of high intensity Al-Zn-Mg alloy.Such a material has the advantages that intensity is high, plasticity and toughness are good, corrosion-resistant, fatigue behaviour is good, can be widely applied to the structural material of Aeronautics and Astronautics, naval vessel and transport facility.The preparation method of material is simple and easy, and its processing technology is easily controllable, and raw material abundance is easy to get, low production cost, has boundless production application prospect.

Description

A kind of high-strength corrosion-resisting rare earth aluminum alloy material and preparation method
Technical field
The invention belongs to alloy material and preparing technical field, more particularly to resistant material field, and in particular to a kind of High-strength corrosion-resisting rare earth aluminum alloy material and preparation method thereof.
Background technology
With developing rapidly for Aeronautics and Astronautics cause and transportation (bullet train), the requirement to structural material More and more higher, it should be tried one's best on the premise of proof strength and mitigate weight and cost, to improve carrying capacity and speed.Density is small, The high high-strength aluminum alloy of specific strength turns into first choice.Aluminium alloy is as excellent lightweight structural material, particularly in properties And after production technology is optimized, it is widely applied on military and civilian.But the plasticity and toughness and fatigue strength of common aluminum alloy It is relatively low, the especially fatigue fracture of high-strength material, do not occur typically to be significantly plastically deformed, it is difficult to detection and prevention, easily Cause larger accident and loss.It is more and more prominent in engineering failure due to being failed caused by fatigue rupture, also cause people Increasingly pay attention to the influence of fatigue rupture and the improvement of aluminium alloy various aspects of performance.
Numerous researchs show, trace rare-earth element is added in aluminium alloy, can significantly improve the metallographic structure of aluminium alloy, Crystal grain thinning, effective dendrite inhibition segregation, removes pernicious gas and impurity in aluminium alloy, reduces the formation of crack of aluminium alloy, so as to The intensity of aluminium alloy is improved, improves processing characteristics, improves hardness, corrosion resistance and fatigue behaviour.Al-Zn-Mg alloy is hot place Enhanced type high strength alumin ium alloy is managed, has that intensity is high, corrosion resistance and hot-working character bigger than mould, density is small and good, but There is dynamic recrystallization in alloy, alloy has recrystallization phenomenon when being dissolved an Ageing Treatment, so as to influence in hot procedure The use intensity of alloy.
The content of the invention
The purpose of the present invention is to develop that a kind of intensity is high, plasticity and toughness are good, corrosion-resistant, fatigue behaviour is good, can be extensive Aluminum alloy materials applied to auto industry field.Technical scheme is specially:
A kind of high-strength corrosion-resisting rare earth aluminum alloy material, its composition are:2~6wt%Zn, 1~3wt%Mg, 0.05~ 0.4wt%Cu, 0.1~0.5wt%Ce, 0.1~0.5wt%Sc, 0.07~0.4wt%Er, aluminium are balance.
Its Vickers hardness is not less than 120HV at room temperature, and room temperature tensile intensity is not less than 380Mpa, and elongation is not less than 5%, in 234g/LNaCl+50g/LKN03+6.5mlHNO3Mixing acidic salt solution in after test period 48h, the peeling of material Corrosion class is not less than EALevel, is 3.0wt%NaCl+0.5wt%H in stress corrosion environment202Salting liquid in, material is most Long rupture time is not less than 220 hours.
EALevel:Elementary stripping candle, specimen surface have a small amount of swelling and cracking, thin slice or powder are presented, and have slight metal stripping Layer.
N levels:Specimen surface does not have spot corrosion and degrades sign, it is allowed to has slight uniformly rotten candle, surface can have discoloration.
P levels:Point candle, has discontinuous hot spot in specimen surface.
Carried out according to rower HB5254-83 on the rotten candle testing machine of FY-06A types tensile stress, room temperature corruption candle ring border is 3.0wt%NaCl+0.5wt%H202Salting liquid, rupture time of the sample in stress corruption candle ring border is most long, be 240 hours.
Furtherly, Er atoms should meet following formula with Sc atomic ratios:Er:Sc atomic ratios are 2.5~3.0:1.
The method for preparing a kind of high-strength corrosion-resisting rare earth aluminum alloy material of the present invention, is carried out as follows:
Step 1:By 20Kg industrial aluminiums (99.7wt% purity), 4~12Kg Al-Zn intermediate alloys (50wt%Zn, 50wt%Al), 0.17~1.33Kg Al-Cu (30wt%Cu, 70wt%Al) is uniformly mixed and heated abundant fusing, obtains one Secondary alloyed aluminium-alloy melt.
Step 2:By 20Kg industrial aluminiums (99.7wt% purity), 1~5Kg Al-Ce intermediate alloys (10wt%Ce, 90wt%Al) uniformly mix and fully melt, obtain secondary alloyed aluminium alloy melt.
Step 3:By 10~48Kg industrial aluminiums (99.7wt% purity), 5~25KgAl-Sc (2wt%Sc, 98wt%Al) Intermediate alloy, 0.7~4KgAl-Er (10Erwt%, 90wt%Al) intermediate alloy are uniformly mixed and fully melted, and are obtained three times Alloyed aluminium-alloy melt.
Step 4:The conjunction three times that secondary alloyed aluminium alloy melt obtained by step 2 is obtained by funnel addition step 3 In aurification aluminium alloy melt, after heating and stirring 30min, four alloyed aluminium-alloy melts are obtained.
Step 5:Four alloyed aluminium-alloy melts that step 4 is obtained, the once conjunction obtained by funnel addition step 1 In aurification aluminium alloy melt, after heating stirring 30min, five alloyed aluminium-alloy melts are obtained.
Step 6:With dry aluminium foil tight 1~3Kg metal Mg blocks, five alloyings of gained in step 5 are put into Aluminium alloy melt, obtain cda alloy aluminium alloy melt.
Step 7:The cda alloy aluminium alloy melt that step 6 obtains is stirred under conditions of 730 DEG C, then added 0.50Kg carbon trichloride refining agents are refined and removed the gred, aluminium alloy melt after being refined.
Step 8:By aluminium alloy melt after the refining obtained by step 7 after 700~720 DEG C of insulations stand 30min, square is poured into Rectangular aluminium alloy ingot casting is obtained in shape mold cavity, after air cooling.
Step 9:Rectangular aluminium alloy ingot casting obtained by step 8 is put into progress Homogenization Treatments in heat-treatment furnace and is placed in sky Natural cooling in gas, obtain homogenizing ingot casting.
Step 10:Homogenization ingot casting obtained by step 9 is subjected to surface cut processing, obtains the smooth ingot casting in surface.
Step 11:The smooth ingot casting in step 10 gained surface is subjected to hot rolling, obtains hot rolled plate.
Step 12:Hot rolled plate obtained by step 11 is subjected to cold-rolling treatment, obtains cold rolled sheet.
Step 13:Cold rolled sheet obtained by step 12 is subjected to solution treatment, obtains being dissolved sheet material.
Step 14:Solid solution sheet material obtained by step 13 is subjected to Ageing Treatment and quenched, obtains a timeliness sheet material.
Step 15:A timeliness sheet material obtained by step 14 is subjected to secondary ageing processing and quenched, obtains finished product.
Beneficial technique effect
The present invention adds appropriate Cu and Rare-Earth Ce, Sc, Er member respectively on the basis of high intensity Al-Zn-Mg alloy Element, make a kind of good Al-Zn-Mg-Cu-Ce-Sc-Er aluminum alloy materials of combination property.Further to excavate aluminium alloy Potentiality and pursue preferably strong plasticity and coordinate and fatigue behaviour, the appropriate Cu elements and tool for improving corrosion resistance of present invention addition There are Rare-Earth Ce, Sc, Er element of the title of " industrial vitamin ", prepare a kind of aluminum alloy materials.The material is in proof strength Meanwhile also had a extensive future with good plasticity and toughness, corrosion resistance and fatigue behaviour.Such a material has advantages below.
1) intensity is high, and alloy element Zn and Mg are main intensified elements, and presence makes that η (MgZn can be formed jointly for they2) and T (Al2Mg3Zn3) hardening constituent, improve the intensity and hardness of alloy.
2) it is corrosion-resistant, the addition of alloying element cu, improve alloy anticorrosion stress-resistant performance and tensile strength in stress Corrosive environment is 3.0wt%NaCl+0.5wt%H202Salting liquid in, the most long rupture time of material is not less than 220 hours.
3) plasticity and toughness are good, and Rare-Earth Ce not only can also combine to form rare earth compound, only with crystal grain thinning with impurity element Change crystal boundary, eliminate the illeffects of impurity element, and alloy chemical combination is formd with the alloying element interaction in alloy Thing, changes the phase composition in alloy, is in that the rare-earth phase of Dispersed precipitate can play dispersion-strengthened action after timeliness, improves conjunction The plasticity and toughness of gold.
4) fatigue behaviour is good, and rare earth Sc, Er atom are combined the nascent A1 of precipitation with Al atoms during alloy graining3Sc and Al3Er Secondary phase particle, A13Sc、Al3Er particle refinement as cast conditions α (A1) crystal grain, secondary A1 is separated out in alloy homogenizing annealing3Sc、 Al3Er second phase particles Dispersed precipitates, improve aluminium alloy obdurability and suppress alloy deformation tissue recrystallization, also improve simultaneously The fatigue behaviour of alloy.
5) it is readily produced, raw material abundance is easy to get, and low production cost, production technology is easily controllable, has boundless Production application prospect.
There is provided while of the invention it is a set of realize mentioned component proportioning, process route/scheme of combination property.This method institute The raw material of use, equipment are that metallurgy industry often uses raw material and conventional equipment, and popularization difficulty is small, upgrade cost is low, comprehensive Can -- cost is than excellent.
Embodiment
Now describe the technical characterstic and details of the present invention in detail.
A kind of high-strength corrosion-resisting rare earth aluminum alloy material, its composition are:2~6wt%Zn, 1~3wt%Mg, 0.05~ 0.4wt%Cu, 0.1~0.5wt%Ce, 0.1~0.5wt%Sc, 0.07~0.4wt%Er, aluminium are balance.At room temperature Its Vickers hardness is not less than 120HV, and room temperature tensile intensity is not less than 380Mpa, and elongation is not less than 5%, in 234g/LNaCl+ 50g/LKN03+6.5mlHNO3Mixing acidic salt solution in after test period 48h, the rotten candle grade of peeling of material is not less than EA Level, is 3.0wt%NaCl+0.5wt%H in stress corruption candle ring border202Salting liquid in, the most long rupture time of material is not less than 220 hours.
Furtherly, Er atoms should meet following formula with Sc atomic ratios:Er:Sc atomic ratios are 2.5~3.0:1.
The method for preparing a kind of high-strength corrosion-resisting rare earth aluminum alloy material of the present invention, is carried out as follows:
Step 1:By 20Kg industrial aluminiums, 4~12Kg Al-Zn intermediate alloys, 0.17~1.33Kg Al-Cu it is uniform Abundant fusing is mixed and heated, obtains an alloyed aluminium-alloy melt.
Step 2:By 20Kg industrial aluminiums, 1~5Kg Al-Ce intermediate alloys, uniformly mix and fully melt, obtain two Secondary alloyed aluminium-alloy melt.
Step 3:10~48Kg industrial aluminiums, 5~25KgAl-Sc intermediate alloys, 0.7~4KgAl-Er intermediate alloys is equal It is even to mix and fully melt, obtain alloyed aluminium-alloy melt three times.
Step 4:The conjunction three times that secondary alloyed aluminium alloy melt obtained by step 2 is obtained by funnel addition step 3 In aurification aluminium alloy melt, after heating and stirring 30min, four alloyed aluminium-alloy melts are obtained.
Step 5:Four alloyed aluminium-alloy melts that step 4 is obtained, the once conjunction obtained by funnel addition step 1 In aurification aluminium alloy melt, after heating stirring 30min, five alloyed aluminium-alloy melts are obtained.
Step 6:With dry aluminium foil tight 1~3Kg metal Mg blocks, five alloyings of gained in step 5 are put into Aluminium alloy melt, obtain cda alloy aluminium alloy melt.
Step 7:The cda alloy aluminium alloy melt that step 6 obtains is stirred under conditions of 730 DEG C, then added 0.50Kg carbon trichloride refining agents are refined and removed the gred, aluminium alloy melt after being refined.
Step 8:By aluminium alloy melt after the refining obtained by step 7 after 700~720 DEG C of insulations stand 30min, square is poured into Rectangular aluminium alloy ingot casting is obtained in shape mold cavity, after air cooling.
Step 9:Rectangular aluminium alloy ingot casting obtained by step 8 is put into progress Homogenization Treatments in heat-treatment furnace and is placed in sky Natural cooling in gas, obtain homogenizing ingot casting.
Step 10:Homogenization ingot casting obtained by step 9 is subjected to surface cut processing, obtains the smooth ingot casting in surface.
Step 11:The smooth ingot casting in step 10 gained surface is subjected to hot rolling, obtains hot rolled plate.
Step 12:Hot rolled plate obtained by step 11 is subjected to cold-rolling treatment, obtains cold rolled sheet.
Step 13:Cold rolled sheet obtained by step 12 is subjected to solution treatment, obtains being dissolved sheet material.
Step 14:Solid solution sheet material obtained by step 13 is subjected to Ageing Treatment and quenched, obtains a timeliness sheet material.
Step 15:A timeliness sheet material obtained by step 14 is subjected to secondary ageing processing and quenched, obtains finished product.
Furtherly, in step 1, the purity of industrial aluminium is 99.7wt%, and the composition of Al-Zn intermediate alloys is 50wt%Zn and 50wt%Al, Al-Cu composition are 30wt%Cu and 70wt%Al,.In step 2, the purity of industrial aluminium is The composition of 99.7wt%, Al-Ce intermediate alloy is 10wt%Ce and 90wt%Al.In step 3, the purity of industrial aluminium is The composition of 99.7wt%, Al-Sc intermediate alloy is 2wt%Sc and the composition of 98wt%Al, Al-Er intermediate alloy is 10wt%Er With 90wt%Al.
The optimal technical scheme for preparing product of the present invention is to carry out as follows:
Step 1:By 20Kg industrial aluminiums (99.7wt% purity), 4~12Kg Al-Zn intermediate alloys (50wt%Zn, 50wt%Al), after 0.17~1.33Kg Al-Cu (30wt%, 70wt%Al) is uniformly mixed, smelting furnace burner hearth, heating are loaded Body of heater makes material fully melt to 760~800 DEG C, after aluminium alloy melt is cooled to 730~750 DEG C, after being incubated 10min, stop Only heat, obtain an alloyed aluminium-alloy melt.
Step 2:By 20Kg industrial aluminiums (99.7wt% purity), 1~5KgAl-Ce intermediate alloys (10wt%Ce, 90wt%Al), uniformly after mixing, load smelting furnace burner hearth, heating furnace body makes material fully melt to 820~860 DEG C, after by aluminium Alloy melt is cooled to 760~780 DEG C, after being incubated 10min, stops heating, obtains secondary alloyed aluminium alloy melt.
Step 3:By 10~48Kg industrial aluminiums (99.7wt% purity), 5~25KgAl-Sc (2wt%Sc, 98wt%Al) Intermediate alloy, 0.7~4KgAl-Er (10wt%Er, 90wt%Al) intermediate alloy uniformly after mixing, load smelting furnace burner hearth, added Hot stove body makes material fully melt to 830~850 DEG C, after aluminium alloy melt is cooled to 730~760 DEG C, after being incubated 10min, Stop heating, obtain alloyed aluminium-alloy melt three times.
Step 4:The conjunction three times that secondary alloyed aluminium alloy melt obtained by step 2 is obtained by funnel addition step 3 In aurification aluminium alloy melt, heating furnace body, make body of heater after 750~760 DEG C are incubated 10min, open magnetic stirrer, stirring After 30min, four alloyed aluminium-alloy melts are obtained
Step 5:Four alloyed aluminium-alloy melts that step 4 is obtained, the once conjunction obtained by funnel addition step 1 In aurification aluminium alloy melt, heating furnace body, make body of heater after 730~750 DEG C are incubated 10min, open magnetic stirrer, stirring After 30min, five alloyed aluminium-alloy melts are obtained.
Step 6:With dry aluminium foil tight 1~3Kg metal Mg blocks, the metal Mg blocks of parcel are pressed into using spoon is pressed Five alloyed aluminium-alloy melts of gained, obtain cda alloy aluminium alloy melt in step 5.
Step 7:In 730 DEG C of unlatching magnetic stirrers, by 30min electromagnetic agitation, melting furnace, body of heater is set to exist After 740~760 DEG C of insulation 10min, add 0.50Kg carbon trichloride refining agents and refined and removed the gred, aluminium alloy after being refined Melt.
Step 8:By aluminium alloy melt after the refining obtained by step 7 after 700~720 DEG C of insulations stand 30min, slowly fall Enter in rectangular mould die cavity, square aluminium alloy cast ingot is obtained after air cooling.
Step 9:Rectangle aluminium alloy cast ingot obtained by step 8 is put into heat-treatment furnace and carries out Homogenization Treatments, is incubated Temperature is 400 DEG C~500 DEG C, and soaking time is 12h~24h, is placed in air and is allowed to natural cooling, obtains homogenizing ingot casting.
Step 10:Homogenization ingot casting obtained by step 9 is subjected to surface cut processing, ingot casting surface defect is removed, obtains The smooth ingot casting in surface.
Step 11:Smooth ingot casting obtained by step 10 is subjected to hot rolling, before hot rolling ingot casting preheat 4 at 400~500 DEG C~ 8h, hot-rolled temperature are 300~400 DEG C, deflection 60%~70%, obtain the hot rolled plate that thickness of slab is 10.0mm.
Step 12:Hot rolled plate obtained by step 11 is subjected to cold-rolling treatment, sheet material is made annealing treatment before cold rolling, moved back Fiery temperature is 300~500 DEG C, and soaking time is 1~5h, cold with stove, and sheet material cold rolling reduction is 80%, obtains the cold of 2mm thickness Rolling sheets.
Step 13:Cold rolled sheet obtained by step 11 is subjected to solution treatment, solid solubility temperature is 500~550 DEG C, during insulation Between be 2~4h, take out sheet material, and lose and Quenching Treatment is done in water, obtain being dissolved sheet material.
Step 14:By the solid solution sheet material obtained by step 13, it is immediately placed in air dry oven and carries out Ageing Treatment, timeliness temperature Spend and be:120~150 DEG C, aging time is 4~16h, and taking-up is lost in water immediately, Quenching Treatment, obtains a timeliness sheet material.
Step 15:By a timeliness sheet material obtained by step 14, it is put into air dry oven and carries out Ageing Treatment, timeliness temperature Spend and be:150~180 DEG C, aging time is 2~12h, and taking-up is lost in water immediately, Quenching Treatment, obtains finished product.The finished product Composition is:2~6wt%Zn, 1~3wt%Mg, 0.05~0.4wt%Cu, 0.1~0.5wt%Ce, 0.1~0.5wt%Sc, 0.07~0.4wt%Er, aluminium are balance;
Its Vickers hardness is not less than 120HV at room temperature, and room temperature tensile intensity is not less than 380Mpa, and elongation is not less than 5%;
In 234g/L NaCl+50g/L KN03+6.5ml HNO3Mixing acidic salt solution in after test period 48h, material The Peeling Corrosion grade of material is not less than EALevel;
It is 3.0wt%NaCl+0.5wt%H in stress corrosion environment202Salting liquid in, the most long rupture time of material is not Less than 220 hours.
Case study on implementation 1
Step 1:By 2Kg industrial aluminiums (99.7wt% purity), 0.4Kg Al-Zn intermediate alloys (50wt%Zn, 50wt%Al), after 0.017Kg Al-Cu (30wt%Cu, 70wt%Al) is uniformly mixed, smelting furnace burner hearth, heating furnace body are loaded Material is fully melted to 760 DEG C, after aluminium alloy melt is cooled to 730 DEG C, after being incubated 10min, stop heating, obtain once Alloyed aluminium-alloy melt.
Step 2:By 2Kg industrial aluminiums (99.7wt% purity), 0.1KgAl-Ce intermediate alloys (10wt%Ce, 90wt% Al), uniformly after mixing, load smelting furnace burner hearth, heating furnace body makes material fully melt to 860 DEG C, after aluminium alloy melt is dropped Temperature is to 780 DEG C, after being incubated 10min, stops heating, obtains secondary alloyed aluminium alloy melt.
Step 3:Among 4.81Kg industrial aluminiums (99.7wt% purity), 0.5KgAl-Sc (2wt%Sc, 98wt%Al) Alloy, 0.07KgAl-Er (10wt%Er, 90wt%Al) intermediate alloy uniformly after mixing, load smelting furnace burner hearth, heating furnace body Material is fully melted to 850 DEG C, after aluminium alloy melt is cooled to 760 DEG C, after being incubated 10min, stop heating, obtain three times Alloyed aluminium-alloy melt.
Step 4:The conjunction three times that secondary alloyed aluminium alloy melt obtained by step 2 is obtained by funnel addition step 3 In aurification aluminium alloy melt, heating furnace body, body of heater is opened magnetic stirrer after 760 DEG C are incubated 10min, stir 30min Afterwards, four alloyed aluminium-alloy melts are obtained
Step 5:Four alloyed aluminium-alloy melts that step 4 is obtained, the once conjunction obtained by funnel addition step 1 In aurification aluminium alloy melt, heating furnace body, body of heater is opened magnetic stirrer after 740 DEG C are incubated 10min, stir 30min Afterwards, five alloyed aluminium-alloy melts are obtained.
Step 6:With dry aluminium foil tight 0.1Kg metal Mg blocks, the metal Mg blocks of parcel are pressed into using spoon is pressed Five alloyed aluminium-alloy melts of gained, obtain cda alloy aluminium alloy melt in step 5.
Step 7:In 730 DEG C of unlatching magnetic stirrers, by 30min electromagnetic agitation, melting furnace, body of heater is set to exist After 750 DEG C of insulation 10min, add 0.05Kg carbon trichloride refining agents and refined and removed the gred, aluminium alloy melt after being refined.
Step 8:By aluminium alloy melt after the refining obtained by step 7 after 710 DEG C of insulations stand 30min, square is poured slowly into Square aluminium alloy cast ingot is obtained in shape mold cavity, after air cooling.
Step 9:Rectangle aluminium alloy cast ingot obtained by step 8 is put into heat-treatment furnace and carries out Homogenization Treatments, is incubated Temperature is 500 DEG C, soaking time 12h, is placed in air and is allowed to natural cooling, obtains homogenizing ingot casting.
Step 10:Homogenization ingot casting obtained by step 9 is subjected to surface cut processing, ingot casting surface defect is removed, obtains The smooth ingot casting in surface.
Step 11:Ingot casting smooth obtained by step 10 is subjected to hot rolling, ingot casting preheats 4h, hot rolling at 500 DEG C before hot rolling Temperature is 400 DEG C, deflection 60%~70%, obtains the hot rolled plate that thickness of slab is 10.0mm.
Step 12:Hot rolled plate obtained by step 11 is subjected to cold-rolling treatment, sheet material is made annealing treatment before cold rolling, moved back Fiery temperature is 450 DEG C, and soaking time 4h, cold with stove, sheet material cold rolling reduction is 80%, obtains the thick cold rolled sheets of 2mm.
Step 13:Cold rolled sheet obtained by step 11 is subjected to solution treatment, solid solubility temperature is 500 DEG C, soaking time 2 ~4h, sheet material is taken out, and lose and Quenching Treatment is done in water, obtain being dissolved sheet material.
Step 14:By the solid solution sheet material obtained by step 13, it is immediately placed in air dry oven and carries out Ageing Treatment, timeliness temperature Spend and be:120 DEG C, aging time 6h, taking-up is lost in water immediately, Quenching Treatment, obtains a timeliness sheet material.
Step 15:By a timeliness sheet material obtained by step 14, it is put into air dry oven and carries out Ageing Treatment, timeliness temperature Spend and be:180 DEG C, aging time 2h, taking-up is lost in water immediately, Quenching Treatment, obtains finished product.
The detection of the instrument such as SEM, XRD after testing, composition proportion 2.01wt%Zn, 1.00wt%Mg of the product, 0.05wt%Cu, 0.1wt%Ce, 0.1wt%Sc, 0.07wt%Er, Al are that balance carries out dispensing, gross mass 10Kg.
Utilize the Vickers hardness of HV-5 type Smaller loads Vickers measurement material, average value 123HV.
The room temperature tensile Mechanics Performance Testing of the alloy of this material is by standard GB/T/T228-2010 in CSS-44100 electricity Carried out in sub- universal material experimental machine, draw speed 2mm/min, it is 385MPa to count counted tensile strength average value, average Elongation is 7.26%.
Testing for rotten candle grade is peeled off to material according to ASTMG34-01 standards, in 234g/L NaCl+50g/L KNO3+6.5ml HNO3Mixing acidic salt solution in after etch 48h, the rotten candle grade of peeling of material is EALevel (elementary stripping candle, Specimen surface has a small amount of swelling and cracking, and thin slice or powder is presented, there is slight metal delamination).
The test of the rotten candle performance of stress is carried out according to rower HB5254-83, in the rotten candle testing machine of FY-06A types tensile stress Upper progress, room temperature corruption candle ring border are 3.0wt%NaCl+0.5wt%H202Salting liquid, sample is disconnected in stress corruption candle ring border Split the time up to 220 hours.
Case study on implementation 2
Step 1:By 2Kg industrial aluminiums (99.7wt% purity), 1.2Kg Al-Zn intermediate alloys (50wt%Zn, 50wt%Al), after 0.134Kg Al-Cu (30wt%Cu, 70wt%Al) is uniformly mixed, smelting furnace burner hearth, heating furnace body are loaded Material is fully melted to 760 DEG C, after aluminium alloy melt is cooled to 730 DEG C, after being incubated 10min, stop heating, obtain once Alloyed aluminium-alloy melt.
Step 2:By 2Kg industrial aluminiums (99.7wt% purity), 0.5KgAl-Ce intermediate alloys (10wt%Ce, 90wt% Al), uniformly after mixing, load smelting furnace burner hearth, heating furnace body makes material fully melt to 860 DEG C, after aluminium alloy melt is dropped Temperature is to 760 DEG C, after being incubated 10min, stops heating, obtains secondary alloyed aluminium alloy melt.
Step 3:Among 1.0Kg industrial aluminiums (99.7wt% purity), 2.5KgAl-Sc (2wt%Sc, 98wt%Al) Alloy, 0.4KgAl-Er (10Erwt%, 90wt%Al) intermediate alloy uniformly after mixing, load smelting furnace burner hearth, heating furnace body Material is fully melted to 850 DEG C, after aluminium alloy melt is cooled to 760 DEG C, after being incubated 10min, stop heating, obtain three times Alloyed aluminium-alloy melt.
Step 4:The conjunction three times that secondary alloyed aluminium alloy melt obtained by step 2 is obtained by funnel addition step 3 In aurification aluminium alloy melt, heating furnace body, body of heater is opened magnetic stirrer after 750 DEG C are incubated 10min, stir 30min Afterwards, four alloyed aluminium-alloy melts are obtained
Step 5:Four alloyed aluminium-alloy melts that step 4 is obtained, the once conjunction obtained by funnel addition step 1 In aurification aluminium alloy melt, heating furnace body, body of heater is opened magnetic stirrer after 750 DEG C are incubated 10min, stir 30min Afterwards, five alloyed aluminium-alloy melts are obtained.
Step 6:With dry aluminium foil tight 0.3Kg metal Mg blocks, the metal Mg blocks of parcel are pressed into using spoon is pressed Five alloyed aluminium-alloy melts of gained, obtain cda alloy aluminium alloy melt in step 5.
Step 7:In 730 DEG C of unlatching magnetic stirrers, by 30min electromagnetic agitation, melting furnace, body of heater is set to exist After 750 DEG C of insulation 10min, add 0.05Kg carbon trichloride refining agents and refined and removed the gred, aluminium alloy melt after being refined.
Step 8:By aluminium alloy melt after the refining obtained by step 7 after 710 DEG C of insulations stand 30min, square is poured slowly into Square aluminium alloy cast ingot is obtained in shape mold cavity, after air cooling.
Step 9:Rectangle aluminium alloy cast ingot obtained by step 8 is put into heat-treatment furnace and carries out Homogenization Treatments, is incubated Temperature is 500 DEG C, soaking time 16h, is placed in air and is allowed to natural cooling, obtains homogenizing ingot casting.
Step 10:Homogenization ingot casting obtained by step 9 is subjected to surface cut processing, ingot casting surface defect is removed, obtains The smooth ingot casting in surface.
Step 11:Ingot casting smooth obtained by step 10 is subjected to hot rolling, ingot casting preheats 4h, hot rolling at 500 DEG C before hot rolling Temperature is 400 DEG C, deflection 60wt%~70wt%, obtains the hot rolled plate that thickness of slab is 10.0mm.
Step 12:Hot rolled plate obtained by step 11 is subjected to cold-rolling treatment, sheet material is made annealing treatment before cold rolling, moved back Fiery temperature is 500 DEG C, and soaking time 2h, cold with stove, sheet material cold rolling reduction is 80wt%, obtains the thick cold rolled sheets of 2mm.
Step 13:Cold rolled sheet obtained by step 11 is subjected to solution treatment, solid solubility temperature is 550 DEG C, and soaking time is 2h, sheet material is taken out, and lose and Quenching Treatment is done in water, obtain being dissolved sheet material.
Step 14:By the solid solution sheet material obtained by step 13, it is immediately placed in air dry oven and carries out Ageing Treatment, timeliness temperature Spend and be:120 DEG C, aging time 4h, taking-up is lost in water immediately, Quenching Treatment, obtains a timeliness sheet material.
Step 15:By a timeliness sheet material obtained by step 14, it is put into air dry oven and carries out Ageing Treatment, timeliness temperature Spend for 180 DEG C, aging time 4h, taking-up is lost in water immediately, Quenching Treatment, obtains finished product.
The detection of the instrument such as SEM, XRD after testing, composition proportion 6.0wt%Zn, 3.0wt%Mg, 0.4wt% of the product Cu, 0.49wt%Ce, 0.51wt%Sc, 0.4wt%Er, Al are that balance carries out dispensing, gross mass 10Kg.
Utilize the Vickers hardness of HV-5 type Smaller loads Vickers measurement material, average value 182HV.
The room temperature tensile Mechanics Performance Testing of the alloy of this material is by standard GB/T/T228-2010 in CSS-44100 electricity Carried out in sub- universal material experimental machine, draw speed 2mm/min, it is 583MPa to count counted tensile strength average value, average Elongation is 5.47%.
Testing for rotten candle grade is peeled off to material according to ASTMG34-01 standards, in 234g/L NaCl+50g/L KNO3+6.5ml HNO3Mixing acidic salt solution in after etch 48h, the rotten candle grade of peeling of material is that (specimen surface does not have N levels There is spot corrosion and degrade sign, it is allowed to have slight uniformly rotten candle, surface there can be discoloration).
The test of the rotten candle performance of stress is carried out to material according to rower HB5254-83, is tested in FY-06A type tensile stresses Carried out on corruption candle testing machine, room temperature corruption candle ring border is 3.0wt%NaCl+0.5wt%H202Salting liquid, sample lights up stress is rotten Rupture time in environment up to 260 hours.

Claims (3)

1. prepare a kind of method of high-strength corrosion-resisting rare earth aluminum alloy material, it is characterised in that:Specifically carry out as follows:
Step 1:20Kg industrial aluminiums, 4~12Kg Al-Zn intermediate alloys, 0.17~1.33Kg Al-Cu are uniformly mixed Afterwards, load smelting furnace burner hearth, heating furnace body makes material fully melt to 760~800 DEG C, after aluminium alloy melt is cooled to 730 ~750 DEG C, after being incubated 10min, stop heating, obtain an alloyed aluminium-alloy melt;
Step 2:After 20Kg industrial aluminiums are uniformly mixed with 1~5KgAl-Ce intermediate alloys, load smelting furnace burner hearth, heating furnace Body makes material fully melt to 820~860 DEG C, after aluminium alloy melt is cooled to 760~780 DEG C, after being incubated 10min, stop Heating, obtains secondary alloyed aluminium alloy melt;
Step 3:10~48Kg industrial aluminiums, 5~25KgAl-Sc intermediate alloys, 0.7~4KgAl-Er intermediate alloys are uniformly mixed After conjunction, load smelting furnace burner hearth, heating furnace body makes material fully melt to 830~850 DEG C, after aluminium alloy melt is cooled to 730~760 DEG C, after being incubated 10min, stop heating, obtain alloyed aluminium-alloy melt three times;
Step 4:The alloying three times that secondary alloyed aluminium alloy melt obtained by step 2 is obtained by funnel addition step 3 In aluminium alloy melt, heating furnace body, body of heater is opened magnetic stirrer after 750~760 DEG C are incubated 10min, stir 30min Afterwards, four alloyed aluminium-alloy melts are obtained;
Step 5:4 alloyed aluminium-alloy melts that step 4 is obtained, the alloying obtained by funnel addition step 1 In aluminium alloy melt, heating furnace body, body of heater is opened magnetic stirrer after 730~750 DEG C are incubated 10min, stir 30min Afterwards, five alloyed aluminium-alloy melts are obtained;
Step 6:With dry aluminium foil tight 1~3Kg metal Mg blocks, the metal Mg blocks of parcel are pressed into step using spoon is pressed Five alloyed aluminium-alloy melts of gained, obtain cda alloy aluminium alloy melt in 5;
Step 7:In 730 DEG C of unlatching magnetic stirrers, by 30min electromagnetic agitation, melting furnace, make body of heater 740~ After 760 DEG C of insulation 10min, add 0.50Kg carbon trichloride refining agents and refined and removed the gred, aluminium alloy melt after being refined;
Step 8:By aluminium alloy melt after the refining obtained by step 7 after 700~720 DEG C of insulations stand 30min, square is poured slowly into Square aluminium alloy cast ingot is obtained in shape mold cavity, after air cooling;
Step 9:Rectangle aluminium alloy cast ingot obtained by step 8 is put into heat-treatment furnace and carries out Homogenization Treatments, holding temperature For 400 DEG C~500 DEG C, soaking time is 12h~24h, is placed in air and is allowed to natural cooling, obtains homogenizing ingot casting;
Step 10:Homogenization ingot casting obtained by step 9 is subjected to surface cut processing, ingot casting surface defect is removed, obtains surface Smooth ingot casting;
Step 11:Ingot casting smooth obtained by step 10 is subjected to hot rolling, ingot casting preheats 4~8h at 400~500 DEG C before hot rolling, Hot-rolled temperature is 300~400 DEG C, deflection 60%~70%, obtains the hot rolled plate that thickness of slab is 10.0mm;
Step 12:Hot rolled plate obtained by step 11 is subjected to cold-rolling treatment, sheet material made annealing treatment before cold rolling, annealing temperature Spend for 300~500 DEG C, soaking time is 1~5h, cold with stove, and sheet material cold rolling reduction is 80%, obtains the thick cold-reduced sheets of 2mm Material;
Step 13:Cold rolled sheet obtained by step 11 is subjected to solution treatment, solid solubility temperature is 500~550 DEG C, and soaking time is 2~4h, sheet material is taken out, and lose and Quenching Treatment is done in water, obtain being dissolved sheet material;
Step 14:By the solid solution sheet material obtained by step 13, it is immediately placed in air dry oven and carries out Ageing Treatment, aging temp For:120~150 DEG C, aging time is 4~16h, and taking-up is lost in water immediately, Quenching Treatment, obtains a timeliness sheet material;
Step 15:By a timeliness sheet material obtained by step 14, it is put into air dry oven and carries out Ageing Treatment, aging temp For:150~180 DEG C, aging time is 2~12h, and taking-up is lost in water immediately, Quenching Treatment, obtains finished product;
The composition of the finished product is:2~6wt%Zn, 1~3wt%Mg, 0.05~0.4wt%Cu, 0.1~0.5wt%Ce, 0.1~ 0.5wt%Sc, 0.07~0.4wt%Er, aluminium are balance;
Its Vickers hardness is not less than 120HV at room temperature, and room temperature tensile intensity is not less than 380Mpa, and elongation is not less than 5%;
In 234g/L NaCl+50g/L KN03+6.5ml HNO3Mixing acidic salt solution in after test period 48h, material Peeling Corrosion grade is not less than EALevel;
It is 3.0wt%NaCl+0.5wt%H in stress corrosion environment202Salting liquid in, the most long rupture time of material is not less than 220 hours.
2. according to claim 1 prepare a kind of method of high-strength corrosion-resisting rare earth aluminum alloy material, it is characterised in that:
In step 1, the purity of industrial aluminium is 99.7wt%, and the composition of Al-Zn intermediate alloys is 50wt%Zn and 50wt% Al, Al-Cu composition are 30wt%Cu and 70wt%Al;
In step 2, the purity of industrial aluminium is 99.7wt%, and the composition of Al-Ce intermediate alloys is 10wt%Ce and 90wt% Al;
In step 3, the purity of industrial aluminium is 99.7wt%, and the composition of Al-Sc intermediate alloys is 2wt%Sc and 98wt% The composition of Al, Al-Er intermediate alloy is 10wt%Er and 90wt%Al.
3. according to claim 1 prepare a kind of method of high-strength corrosion-resisting rare earth aluminum alloy material, it is characterised in that: In the composition of the finished product, Er atoms should meet following formula with Sc atomic ratios:Er:Sc atomic ratios are 2.5~3.0:1.
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