CN108220704A - A kind of preparation method of the corrosion-resistant pack alloy containing praseodymium and ytterbium - Google Patents

A kind of preparation method of the corrosion-resistant pack alloy containing praseodymium and ytterbium Download PDF

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CN108220704A
CN108220704A CN201711473520.4A CN201711473520A CN108220704A CN 108220704 A CN108220704 A CN 108220704A CN 201711473520 A CN201711473520 A CN 201711473520A CN 108220704 A CN108220704 A CN 108220704A
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闫洪
喻保标
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南昌大学
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C21/00Alloys based on aluminium
    • C22C21/02Alloys based on aluminium with silicon as the next major constituent
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/026Alloys based on aluminium
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/02Making alloys by melting
    • C22C1/03Making alloys by melting using master alloys
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C1/00Making alloys
    • C22C1/06Making alloys with the use of special agents for refining or deoxidising
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22FCHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/043Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent

Abstract

A kind of preparation method of the corrosion-resistant pack alloy containing praseodymium and ytterbium, each element mass percentage composition are:3.0 ~ 4.5wt.% of silicon, 0.5 ~ 1wt.% of magnesium, 0.5 ~ 1wt.% of copper, 0.3 ~ 0.5wt.% of ytterbium, remaining is aluminium and inevitable impurity.Control the content of different elements in alloy.It after praseodymium and ytterbium refining, weakens the galvanic corrosion in alloy between intermetallic compound and aluminum substrate and reacts, and do not influence the intrinsic excellent attribute of alloy;Die cast can obtain surface smoothness height and the aluminum alloy materials of dense structure, improve alloy corrosion performance to a certain extent.Two level solution treatment and low temperature aging processing are subsequently carried out to it so that the inert elements such as Cu, Fe fully dissolve, and are influenced so as to further reduced the galvanic corrosion between aluminium base and other active alloying elements.The corrosion resistance of alloy material of the present invention is substantially improved.

Description

A kind of preparation method of the corrosion-resistant pack alloy containing praseodymium and ytterbium
Technical field
The invention belongs to technical field of metal material manufacture, and in particular to a kind of anticorrosion aluminium.
Background technology
Al-Si-Mg-Cu alloys have excellent casting character and higher air-tightness, after thermally treated reinforcing have compared with High intensity and excellent mechanical performance.Due to the Al in Al-Si-Mg-Cu alloys2Cu, eutectic Si, Mg2Si and Al-Fe-Si metals Between the corrosion potential in the seawater such as compound it is higher than α-Al matrix, therefore Al-Si-Cu alloys generation office in the seawater can be led to Portion's corrosion erosion.And local corrosion strongly limits application of the Al-Si-Cu alloys in marine environment.
So far, mainly have to Al-Si-Mg-Cu alloys method of refining:Add rare earth or alkaline earth element, electromagnetic agitation Ultrasonication.However in above-mentioned method, addition rare-earth refining method and technology is easy to operate, and equipment requirement is low, is conducive to big Large-scale production, and rare-earth refining method causes the microstructure of alloy and mechanical performance to be all far superior to matrix.In addition, pressure is cast It is one of state-of-the-art metal forming process to make manufacture aluminum alloy materials technology, is to realize few chip, the effective way of chipless, Using very extensively, have developed rapidly.And die-casting material can realize surface smoothness height and internal grain refinement.It can be to a certain extent Reduce corrosion rate.
Fixation rates are also commonly used for improving as a kind of cost effective method for the advantages that improving toughness and etch resistant properties Aluminium alloy capability.And the present invention makes material undergo two stages of low temperature and high temperature using double_stage guide processing mode.Low temperature is dissolved When low melting point mutually dissolve first, burning and fusing occur when preventing high temperature.Second Phase Particle is dissolved during high temperature solid solution, improves and closes Golden degree of supersaturation.
It is CN104711460B in publication number, it is entitled:" a kind of titaniferous anticorrosion aluminium and its treatment process " In.The melting sequence and smelting time of part different-alloy element are not considered in fusion process, and without overheat after refining Treatment process carries out internal stress elimination to it.
It is CN103966483B in publication number, it is entitled:In " a kind of corrosion-resistant automobile aluminum alloy sheet ".First melt Refining nebulisation operation prepares alloy micron powder, after alloy powder melting and is added in refining agent and refined again, finally pass through again Multistage cold treatment obtains corrosion-resistant automobile aluminum alloy sheet.Its new technology, but multistage cold treatment and heat treatment It compares, heat treatment procedure is relatively simple, convenient for actual production.
It is CN105112738B in publication number, it is entitled:" the preparation process of high-strength corrosion-resisting aluminium alloy and high-strength Spend anticorrosion aluminium " in.In the method that high temperature refinery is combined with solution treatment, high-strength corrosion-resisting aluminium alloy is obtained.So And simple high temperature refinery is with solution treatment that time-consuming, if added in refining process micro refining agent will greatly shorten refining with Solution time.
It is CN104962786B in publication number, it is entitled:In " a kind of anticorrosion aluminium ally section ".During using two level Effect processing carries out the section bar after horizontal casting to be thermally treated resulting in anticorrosion aluminium ally section.It is before secondary time effect without solid Molten processing obtains uniform supersaturated solid solution and directly carries out artificial aging, be unfavorable for during later stage timeliness the precipitation of hardening constituent and The elimination of hot-working early period internal stress.
Therefore, in conclusion still lacking a kind of economy in corrosion-resistant die-cast aluminum alloy material preparation molding technical aspect has The scheme of effect.And mischmetal Pr+Yb elements enhance Al-Si-Mg-Cu alloys the influence of its corrosion resistance and yet there are no report Road, therefore with larger researching value.
Invention content
The purpose of the present invention is to propose to a kind of preparation methods of the corrosion-resistant pack alloy section bar containing praseodymium and ytterbium.
The present invention is achieved by the following technical solutions.
A kind of preparation method of the corrosion-resistant pack alloy containing praseodymium and ytterbium, feature include the following steps:
(1)Its each element mass percentage composition is:3.0 ~ 4.5wt.% of silicon, 0.5 ~ 1wt.% of magnesium, 0.5 ~ 1wt.% of copper, praseodymium 0.3 ~ 0.5wt.%, 0.3 ~ 0.5wt.% of ytterbium, remaining is aluminium and inevitable impurity;The inevitable impurity summation is in the alloy Content be no more than 0.38wt.%, and in the inevitable impurity content of iron in the alloy be no more than 0.09wt.%.
(2)The fine aluminium ingot of certain mass in the corundum crucible that smelting temperature is 700 ~ 720 DEG C is melted, keeps the temperature 5 ~ 10 points Clock.
(3)By step(2)Furnace temperature rises to 810 ~ 830 DEG C, is then equally divided into the Al-10Si alloys of prebake several etc. Part is added in the melt after heating, adds in 1.0 ~ 2.5wt.% of the amount for melt gross mass of Al-10Si alloys every time.Add every time It is stirred after entering using two-blade stirrer, stands heat preservation 5 ~ 10 minutes after all adding in, which is passed through argon gas and is protected.
(4)The Al-10Mg alloys of prebake are equally divided into several equal portions and add in step(3)In the melt, every time The amount for adding in Al-10Mg alloys is 0.2 ~ 0.4wt.% of melt gross mass.It is stirred after adding in every time using two-blade stirrer, Heat preservation 5 ~ 10 minutes are stood after all adding in, which is passed through argon gas and is protected.
(5)The Al-10Cu alloys of prebake are equally divided into several equal portions and add in step(4)In the melt, every time The amount for adding in Al-10Cu alloys is 0.1 ~ 0.3wt.% of melt gross mass.It is stirred after adding in every time using two-blade stirrer, Heat preservation 5 ~ 10 minutes are stood after all adding in, which is passed through argon gas and is protected.
(6)It is refined, the Al-10Pr alloys of prebake are equally divided into several equal portions adds in step(5)Described is molten In vivo, the amount for so adding in Al-10Pr alloys every time is 0.1 ~ 0.3wt.% of melt gross mass.Ultrasound is carried out after adding in every time Processing, ultrasonic power are 650 ~ 700W, and supersonic frequency is the additive amount of 25000 ~ 30000Hz, ultrasonic time and Al-10Pr alloys Direct proportionality, and the additive amount of Al-10Pr alloys often increases by 2 ~ 3min of 0.1wt.% ultrasonic times increase.After all adding in Stand heat preservation 15 ~ 25 minutes.The process is passed through argon gas and is protected.
(7)The Al-10Yb alloys of prebake are equally divided into several equal portions and add in step(6)In the melt, every time The amount for adding in Al-10Yb alloys is 0.1 ~ 0.3wt.% of melt gross mass.It is ultrasonically treated after adding in every time, ultrasonic work( Rate is 700 ~ 750W, and supersonic frequency is the additive amount pass in direct ratio of 27000 ~ 32000Hz, ultrasonic time and Al-10Yb alloys System, and the additive amount of Al-10Yb alloys often increases by 2 ~ 3min of 0.1wt.% ultrasonic times increase.All add in after stand heat preservation 20 ~ 30 minutes.The process is passed through argon gas and is protected;Gained blend melt is skimmed after stirring is stood, sampling point after skimming Analysis, 700 ~ 730 DEG C of heat preservation for standby use are down to by the melt temperature after ingredient qualification.
(8)By step(7)Melt after gained ingredient qualification pours into die casting machine cast gate, is cast into column aluminum alloy materials. Die-casting process setting is as follows:700 ~ 730 DEG C of pouring temperature expects handle thickness 25mm, 150 ~ 170 DEG C of mold temperature.Injection power is 330kN, a diameter of 50mm of tup.Injection pressure 168MPa, shot time 3S, cooling time 2S, mould remaining time 10S.Die casting Die shank actuating length position is in journey:Slow shot initial position is 80mm, and fast shot initial position is 270mm, and pressurization position is 280mm, tracing positional 350mm.
(9)To step(8)Obtained aluminum alloy materials, which are placed in resistance furnace, carries out first order solution treatment, solution treatment temperature It is 450 ± 3 DEG C to spend, soaking time 2.5 ~ 3.5 hours, is put into temperature rapidly afterwards to be cooled down in 60 ~ 70 DEG C of water.
(10)To step(9)It obtains material and is placed in progress second level solution treatment, solid solution temperature 490 in resistance furnace ± 3 DEG C, soaking time 3 ~ 4 hours is put into rapidly temperature to be cooled down in 60 ~ 70 DEG C of water afterwards.
(11)By step(10)The material of gained carries out ageing treatment at a temperature of being placed in 130 ± 3 DEG C, aging time is 5 ~ 6 Hour, it is then air-cooled to obtain a kind of anticorrosion aluminium containing praseodymium and cerium.
Further, step of the present invention(9)The first order solution treatment environment is:One kind is covered using particle circle sand hill Anticorrosion aluminium semi-finished product containing praseodymium and ytterbium, ensure to be heated evenly;Secondly solid solubility temperature is 450 ± 3 DEG C, heating rate 30 ~50℃/min;Soaking time 2.5 ~ 3.5 hours, alloy semi-finished product are just placed in stove since room temperature.
Further, step of the present invention(10)The first order solution treatment environment is:One is covered using particle circle sand hill Anticorrosion aluminium semi-finished product of the kind containing praseodymium and ytterbium, ensure to be heated evenly;Secondly solid solubility temperature is 490 ± 3 DEG C, and heating rate is 50~70℃/min;Soaking time 3 ~ 4 hours, alloy semi-finished product are just placed in stove since room temperature.
Further, step of the present invention(11)The ageing treatment environment is:It is covered using particle circle sand hill solid A kind of molten treated anticorrosion aluminium containing praseodymium and ytterbium, ensures to be heated evenly;Secondly solid solubility temperature is 130 ± 3 DEG C, heating Rate is 18 ~ 25 DEG C/min;Soaking time 5 ~ 6 hours, alloy semi-finished product are just placed in stove since room temperature.
The present invention weakens Al in alloy using rare earth Pr+Yb refining techniques2Cu、Mg2Si, eutectic Si and Al-Fe-Si etc. Galvanic corrosion between intermetallic compound and aluminum substrate reacts, and does not influence Al-Si-Mg-Cu alloys inherently excellent Attribute.Secondly the Al-Si-Mg-Cu alloy melts after being refined using rare earth Pr+Yb carry out die cast, obtain surface smoothness The surface alumina oxide tissue of high and dense structure aluminum alloy materials, bright and clean material surface and densification also can be to a certain extent Improve alloy corrosion performance.And die casting Al-Si-Mg-Cu conjunctions can be substantially improved for single rare earth in mischmetal The solid solubility of gold.Therefore, subsequent targetedly fixation rates so that the heat of the inert elements such as Cu, Fe and generation is steady Qualitative higher mischmetal mutually can fully dissolve so that the formation of Al-Si-Mg-Cu-Pr-Yb alloys microstructure " big anode- Small cathode " phenomenon is further reduced galvanic corrosion influence so that the corrosion resistance of Al-Si-Mg-Cu-Pr-Yb alloys is substantially It is promoted.The result shows that 2 ~ 4 times of the Al-Si-Mg-Cu systems promotion that the corrosion resistance of alloy of the embodiment of the present invention is more common.
The present invention has following uniqueness:(1)Aluminum alloy material surface produced by the present invention is highly polished and surface oxidation Aluminium protective layer is finer and close, has outstanding Seawater durability, can meet the application in marine environment;(2)This hair It is bright to make rare earth Pr+Yb Al in the alloy2The intermetallic compounds such as Cu and Al-Fe-Si surface forms one layer of mischmetal packet Overlay film hinders etching electronic flowing;(3)The present invention can promote the solid solubility of die casting Al-Si-Mg-Cu alloys, make Al-Si- Mg-Cu-Pr-Yb alloys microstructure forms " big anode-small cathode " phenomenon, is further reduced galvanic corrosion influence;(4)This hair Bright safe operation is simple, low for equipment requirements, and manufacture cost is greatly reduced.
Specific embodiment
The present invention will be described further by following embodiment.
Embodiment 1.
(1)According to silicon 3.0wt.%, magnesium 0.5wt.%, copper 0.5wt.%, praseodymium 0.3wt.%, ytterbium 0.3wt.%, remaining is aluminium ratio Example takes technical pure aluminium ingot, Al-10Si alloys, Al-10Mg alloys, Al-10Si alloys, Al-10Cu alloys, Al-10Pr to close respectively Gold and Al-10Yb alloys are put into vacuum drying box, and drying temperature is 70 DEG C, drying time 60 minutes;
(2)One corundum crucible of interior placement in the tube furnace of high-purity argon atmosphere protection, and fine aluminium ingot is added in, smelting temperature 710 DEG C, keep the temperature 7 minutes.
(3)By step(2)In furnace temperature rise to 810 DEG C, then by step(1)The Al-10Si alloys of gained prebake are put down It is divided into the melt after several equal portions add in heating, the amount for so adding in Al-10Si alloys every time is melt gross mass 1.0wt.%.High-temperature alloy steel two-blade stirrer is used to be stirred 1 minute with 30 revs/min of rates after adding in every time, is all added Heat preservation 5 minutes are stood after entering.The process is passed through argon gas and is protected, argon flow amount 20L/min, argon pressure 0.45MPa.
(4)The Al-10Mg alloys of prebake are equally divided into several equal portions and add in step(3)In the melt, every time The amount for adding in Al-10Mg alloys is the 0.3wt.% of melt gross mass.It is stirred after adding in every time using high-temperature alloy steel double leaf Device is stirred 1 minute with 30 revs/min of rates, and heat preservation 5 minutes are stood after all adding in.The process is passed through argon gas and is protected, argon Throughput is 20L/min, argon pressure 0.4MPa.
(5)The Al-10Cu alloys of prebake are equally divided into several equal portions and add in step(4)In the melt, every time The amount for adding in Al-10Cu alloys is the 0.1wt.% of melt gross mass.It is stirred after adding in every time using high-temperature alloy steel double leaf Device is stirred 1 minute with 30 revs/min of rates, and heat preservation 5 minutes are stood after all adding in.The process is passed through argon gas and is protected, argon Throughput is 20L/min, argon pressure 0.4MPa.
(6)The Al-10Pr alloys of prebake are equally divided into several equal portions and add in step(5)In the melt, every time The amount for adding in Al-10Pr alloys is the 0.2wt.% of melt gross mass.It is ultrasonically treated after adding in every time, ultrasonic power is 670W, supersonic frequency 27000Hz, ultrasonic time 6min stand heat preservation 20 minutes after all adding in.The process is passed through argon gas It is protected, argon flow amount 25L/min, argon pressure 0.4MPa.
(7)The Al-10Yb alloys of prebake are equally divided into several equal portions and add in step(6)It is so every in the melt 0.2wt.% of the secondary amount for adding in Al-10Yb alloys for melt gross mass.It is ultrasonically treated after adding in every time, ultrasonic power For 730W, supersonic frequency 29000Hz, ultrasonic time 6min, heat preservation 25 minutes are stood after all adding in.The process is passed through argon Gas is protected, argon flow amount 25L/min, argon pressure 0.4MPa.
(8)Step(7)Gained blend melt is skimmed after stirring is stood, sampling analysis after skimming, by ingredient Melt temperature after qualification is down to 700 DEG C of heat preservation for standby use.
(9)By step(8)Melt after gained ingredient qualification pours into die casting machine cast gate, is cast into column aluminum alloy materials. Die-casting process setting is as follows:680 DEG C of pouring temperature expects handle thickness 60mm, 150 DEG C of mold temperature.Injection power be 330kN, tup A diameter of 50mm.Injection pressure 168MPa, shot time 3S, cooling time 2S, mould remaining time 10S.Die shank moves in press casting procedure It is as travel position:Slow shot initial position is 80mm, and fast shot initial position is 270mm, pressurization position 280mm, is tracked Position is 350mm.
(10)To step(9)Obtained aluminum alloy materials, which are placed in resistance furnace, carries out first order solution treatment, solution treatment Temperature is 450 DEG C, and heating rate is 30 DEG C, soaking time 2.5 hours, is put into temperature rapidly afterwards to be cooled down in 60 DEG C of water.
(11)To step(10)It obtains material and is placed in the interior progress second level solution treatment of resistance furnace, solid solution temperature is 490 DEG C, heating rate is 50 DEG C, soaking time 3.5 hours, is put into temperature rapidly afterwards to be cooled down in 60 DEG C of water.
(12)By step(11)The material of gained carries out ageing treatment at a temperature of being placed in 130 DEG C, heating rate is 18 DEG C, when It is 5 hours to imitate the time, then air-cooled to obtain a kind of anticorrosion aluminium containing praseodymium and ytterbium.
Embodiment 2.
(1)According to silicon 4.0wt.%, magnesium 0.75wt.%, copper 0.75wt.%, praseodymium 0.4wt.%, ytterbium 0.4wt.%, remaining is aluminium ratio Example takes technical pure aluminium ingot, Al-10Si alloys, Al-10Si alloys, Al-10Mg alloys, Al-10Cu alloys, Al-10Pr to close respectively Gold and Al-10Yb alloys are put into vacuum drying box, and drying temperature is 70 DEG C, drying time 60 minutes;
(2)One corundum crucible of interior placement in the tube furnace of high-purity argon atmosphere protection, and fine aluminium ingot is added in, smelting temperature 700 DEG C, keep the temperature 5 minutes.
(3)By step(2)In furnace temperature rise to 820 DEG C, then by step(1)The Al-10Si alloys of gained prebake are put down It is divided into the melt after several equal portions add in heating, the amount for so adding in Al-10Si alloys every time is melt gross mass 1.0wt.%.High-temperature alloy steel two-blade stirrer is used to be stirred 1 minute with 30 revs/min of rates after adding in every time, is all added Heat preservation 5 minutes are stood after entering.The process is passed through argon gas and is protected, argon flow amount 20L/min, argon pressure 0.45MPa.
(4)The Al-10Mg alloys of prebake are equally divided into several equal portions and add in step(3)In the melt, every time The amount for adding in Al-10Mg alloys is the 0.2wt.% of melt gross mass.It is stirred after adding in every time using high-temperature alloy steel double leaf Device is stirred 1 minute with 30 revs/min of rates, and heat preservation 5 minutes are stood after all adding in.The process is passed through argon gas and is protected, argon Throughput is 20L/min, argon pressure 0.4MPa.
(5)The Al-10Cu alloys of prebake are equally divided into several equal portions and add in step(4)In the melt, every time The amount for adding in Al-10Cu alloys is the 0.2wt.% of melt gross mass.It is stirred after adding in every time using high-temperature alloy steel double leaf Device is stirred 1 minute with 30 revs/min of rates, and heat preservation 5 minutes are stood after all adding in.The process is passed through argon gas and is protected, argon Throughput is 20L/min, argon pressure 0.4MPa.
(6)The Al-10Pr alloys of prebake are equally divided into several equal portions and add in step(5)In the melt, every time The amount for adding in Al-10Pr alloys is the 0.2wt.% of melt gross mass.It is ultrasonically treated after adding in every time, ultrasonic power is 650W, supersonic frequency 25000Hz, ultrasonic time 6min stand heat preservation 15 minutes after all adding in.The process is passed through argon gas It is protected, argon flow amount 25L/min, argon pressure 0.4MPa.
(7)The Al-10Yb alloys of prebake are equally divided into several equal portions and add in step(6)It is so every in the melt 0.2wt.% of the secondary amount for adding in Al-10Yb alloys for melt gross mass.It is ultrasonically treated after adding in every time, ultrasonic power For 700W, supersonic frequency 27000Hz, ultrasonic time 6min, heat preservation 20 minutes are stood after all adding in.The process is passed through argon Gas is protected, argon flow amount 25L/min, argon pressure 0.4MPa.
(8)Step(7)Gained blend melt is skimmed after stirring is stood, sampling analysis after skimming, by ingredient Melt temperature after qualification is down to 720 DEG C of heat preservation for standby use.
(9)By step(8)Melt after gained ingredient qualification pours into die casting machine cast gate, is cast into column aluminum alloy materials. Die-casting process setting is as follows:680 DEG C of pouring temperature expects handle thickness 25mm, 160 DEG C of mold temperature.Injection power be 330kN, tup A diameter of 60mm.Injection pressure 168MPa, shot time 3S, cooling time 2S, mould remaining time 10S.Die shank moves in press casting procedure It is as travel position:Slow shot initial position is 80mm, and fast shot initial position is 270mm, pressurization position 280mm, is tracked Position is 350mm.
(10)To step(9)Obtained aluminum alloy materials, which are placed in resistance furnace, carries out first order solution treatment, solution treatment Temperature is 447 DEG C, and heating rate is 30 DEG C, soaking time 2.5 hours, is put into temperature rapidly afterwards to be cooled down in 65 DEG C of water.
(11)To step(10)It obtains material and is placed in the interior progress second level solution treatment of resistance furnace, solid solution temperature is 487 DEG C, heating rate is 50 DEG C, soaking time 3 hours, is put into temperature rapidly afterwards to be cooled down in 65 DEG C of water.
(12)By step(11)The material of gained carries out ageing treatment at a temperature of being placed in 127 DEG C, heating rate is 23 DEG C, when It is 5 hours to imitate the time, then air-cooled to obtain a kind of anticorrosion aluminium containing praseodymium and ytterbium.
Embodiment 3.
(1)According to silicon 4.5wt.%, magnesium 1wt.%, copper 1wt.%, praseodymium 0.5wt.%, ytterbium 0.5wt.%, remaining is al proportion, point Do not take technical pure aluminium ingot, Al-10Si alloys, Al-10Si alloys, Al-10Mg alloys, Al-10Cu alloys, Al-10Pr alloys and Al-10Yb alloys are put into vacuum drying box, and drying temperature is 70 DEG C, drying time 60 minutes;
(2)One corundum crucible of interior placement in the tube furnace of high-purity argon atmosphere protection, and fine aluminium ingot is added in, smelting temperature 700 DEG C, keep the temperature 5 minutes.
(3)By step(2)In furnace temperature rise to 830 DEG C, then by step(1)The Al-10Si alloys of gained prebake are put down It is divided into the melt after several equal portions add in heating, the amount for so adding in Al-10Si alloys every time is melt gross mass 2.5wt.%.High-temperature alloy steel two-blade stirrer is used to be stirred 1 minute with 30 revs/min of rates after adding in every time, is all added Heat preservation 10 minutes are stood after entering.The process is passed through argon gas and is protected, argon flow amount 20L/min, and argon pressure is 0.45MPa。
(4)The Al-10Mg alloys of prebake are equally divided into several equal portions and add in step(3)In the melt, every time The amount for adding in Al-10Mg alloys is the 0.4wt.% of melt gross mass.It is stirred after adding in every time using high-temperature alloy steel double leaf Device is stirred 1 minute with 30 revs/min of rates, and heat preservation 10 minutes are stood after all adding in.The process is passed through argon gas and is protected, argon Throughput is 20L/min, argon pressure 0.4MPa.
(5)The Al-10Cu alloys of prebake are equally divided into several equal portions and add in step(4)In the melt, every time The amount for adding in Al-10Cu alloys is the 0.3wt.% of melt gross mass.It is stirred after adding in every time using high-temperature alloy steel double leaf Device is stirred 1 minute with 30 revs/min of rates, and heat preservation 10 minutes are stood after all adding in.The process is passed through argon gas and is protected, argon Throughput is 20L/min, argon pressure 0.4MPa.
(6)The Al-10Pr alloys of prebake are equally divided into several equal portions and add in step(5)In the melt, every time The amount for adding in Al-10Pr alloys is the 0.3wt.% of melt gross mass.It is ultrasonically treated after adding in every time, ultrasonic power is 700W, supersonic frequency 30000Hz, ultrasonic time 9min stand heat preservation 25 minutes after all adding in.The process is passed through argon gas It is protected, argon flow amount 25L/min, argon pressure 0.4MPa.
(7)The Al-10Yb alloys of prebake are equally divided into several equal portions and add in step(6)It is so every in the melt 0.3wt.% of the secondary amount for adding in Al-10Yb alloys for melt gross mass.It is ultrasonically treated after adding in every time, ultrasonic power For 750W, supersonic frequency 30000Hz, ultrasonic time 9min, heat preservation 30 minutes are stood after all adding in.The process is passed through argon Gas is protected, argon flow amount 25L/min, argon pressure 0.4MPa.
(8)Step(7)Gained blend melt is skimmed after stirring is stood, sampling analysis after skimming, by ingredient Melt temperature after qualification is down to 730 DEG C of heat preservation for standby use.
(9)By step(8)Melt after gained ingredient qualification pours into die casting machine cast gate, is cast into column aluminum alloy materials. Die-casting process setting is as follows:680 DEG C of pouring temperature expects handle thickness 25mm, 170 DEG C of mold temperature.Injection power be 330kN, tup A diameter of 60mm.Injection pressure 116MPa, shot time 3S, cooling time 2S, mould remaining time 10S.Die shank moves in press casting procedure It is as travel position:Slow shot initial position is 80mm, and fast shot initial position is 270mm, pressurization position 280mm, is tracked Position is 350mm.
(10)To step(9)Obtained aluminum alloy materials, which are placed in resistance furnace, carries out first order solution treatment, solution treatment Temperature is 453 DEG C, and heating rate is 50 DEG C, soaking time 3.5 hours, is put into temperature rapidly afterwards to be cooled down in 70 DEG C of water.
(11)To step(10)It obtains material and is placed in the interior progress second level solution treatment of resistance furnace, solid solution temperature is 493 DEG C, heating rate is 70 DEG C, soaking time 4 hours, is put into temperature rapidly afterwards to be cooled down in 70 DEG C of water.
(12)By step(11)The material of gained carries out ageing treatment at a temperature of being placed in 133 DEG C, heating rate is 25 DEG C, when It is 6 hours to imitate the time, then air-cooled to obtain a kind of anticorrosion aluminium containing praseodymium and ytterbium.

Claims (4)

1. a kind of preparation method of the corrosion-resistant pack alloy containing praseodymium and ytterbium, feature include the following steps:
Its each element mass percentage composition is:3.0 ~ 4.5wt.% of silicon, 0.5 ~ 1wt.% of magnesium, 0.5 ~ 1wt.% of copper, praseodymium 0.3 ~ 0.5wt.%, 0.3 ~ 0.5wt.% of ytterbium, remaining is aluminium and inevitable impurity;The inevitable impurity summation is in the alloy Content be no more than 0.38wt.%, and in the inevitable impurity content of iron in the alloy be no more than 0.09wt.%;
First the fine aluminium ingot of certain mass in the corundum crucible that smelting temperature is 700 ~ 720 DEG C is melted, keeps the temperature 5 ~ 10 minutes;
Afterwards by step(2)Furnace temperature rises to 810 ~ 830 DEG C, and the Al-10Si alloys of prebake then are equally divided into several equal portions adds Enter in the melt after heating, the amount for adding in Al-10Si alloys every time is 1.0 ~ 2.5wt.% of melt gross mass;After adding in every time It is stirred using two-blade stirrer, stands heat preservation 5 ~ 10 minutes after all adding in, which is passed through argon gas and is protected;
The Al-10Mg alloys of prebake are equally divided into several equal portions and add in step(3)In the melt, Al- is added in every time The amount of 10Mg alloys is 0.2 ~ 0.4wt.% of melt gross mass;It is stirred using two-blade stirrer after adding in every time, all added in Heat preservation 5 ~ 10 minutes are stood afterwards, which is passed through argon gas and is protected;
The Al-10Cu alloys of prebake are equally divided into several equal portions and add in step(4)In the melt, Al- is added in every time The amount of 10Cu alloys is 0.1 ~ 0.3wt.% of melt gross mass;It is stirred using two-blade stirrer after adding in every time, all added in Heat preservation 5 ~ 10 minutes are stood afterwards, which is passed through argon gas and is protected;
It is refined, the Al-10Pr alloys of prebake are equally divided into several equal portions adds in step(5)In the melt, so The amount for adding in Al-10Pr alloys every time is 0.1 ~ 0.3wt.% of melt gross mass;It is ultrasonically treated, is surpassed after adding in every time Acoustical power is 650 ~ 700W, and supersonic frequency is 25000 ~ 30000Hz, and ultrasonic time is directly proportional to the additive amount of Al-10Pr alloys Example relationship, and the additive amount of Al-10Pr alloys often increases by 2 ~ 3min of 0.1wt.% ultrasonic times increase;It stands and protects after all adding in Temperature 15 ~ 25 minutes;The process is passed through argon gas and is protected;
The Al-10Yb alloys of prebake are equally divided into several equal portions and add in step(6)In the melt, so add in every time The amount of Al-10Yb alloys is 0.1 ~ 0.3wt.% of melt gross mass;It is ultrasonically treated after adding in every time, ultrasonic power is 700 ~ 750W, supersonic frequency are the additive amount direct proportionality of 27000 ~ 32000Hz, ultrasonic time and Al-10Yb alloys, and The additive amount of Al-10Yb alloys, which often increases 0.1wt.% ultrasonic times, increases by 2 ~ 3min;20 ~ 30 points of heat preservation is stood after all adding in Clock;The process is passed through argon gas and is protected;Gained blend melt is skimmed after stirring is stood, sampling analysis after skimming, Melt temperature after ingredient qualification is down to 680 ~ 710 DEG C of heat preservation for standby use;
By step(7)Melt after gained ingredient qualification pours into die casting machine cast gate, is cast into column aluminum alloy materials;Die-casting process Setting is as follows:680 ~ 710 DEG C DEG C of pouring temperature expects handle thickness 60mm, 150 ~ 170 DEG C of mold temperature;Injection power is 330kN, is hammered into shape A diameter of 50mm;Injection pressure 116MPa, shot time 3S, cooling time 2S, mould remaining time 10S;Die shank in press casting procedure Actuating length position is:One fast position is 80mm, and two fast positions are 270mm, pressurization position 280mm, and tracing positional is 350mm;
To step(8)Obtained aluminum alloy materials, which are placed in resistance furnace, carries out first order solution treatment, solid solution temperature 450 ± 3 DEG C, soaking time 2.5 ~ 3.5 hours is put into rapidly temperature to be cooled down in 60 ~ 70 DEG C of water afterwards;
To step(9)It obtains material and is placed in progress second level solution treatment in resistance furnace, solid solution temperature is 490 ± 3 DEG C, is protected Warm 3 ~ 4 hours time is put into rapidly temperature to be cooled down in 60 ~ 70 DEG C of water afterwards;
By step(10)The material of gained carries out ageing treatment at a temperature of being placed in 130 ± 3 DEG C, aging time is 5 ~ 6 hours, then It is air-cooled to obtain a kind of anticorrosion aluminium containing praseodymium and ytterbium.
2. preparation method according to claim 1, it is characterized in that step(9)The first order solution treatment environment is: The anticorrosion aluminium semi-finished product containing praseodymium and ytterbium are covered using particle circle sand hill;Solid solubility temperature is 450 ± 3 DEG C, heating rate for 30 ~ 50℃/min;Soaking time 2.5 ~ 3.5 hours, alloy semi-finished product are just placed in stove since room temperature.
3. preparation method according to claim 1, it is characterized in that step(10)The second level solution treatment environment is: The anticorrosion aluminium semi-finished product containing praseodymium and ytterbium are covered using particle circle sand hill;Solid solubility temperature is 490 ± 3 DEG C, heating rate for 50 ~ 70℃/min;Soaking time 3 ~ 4 hours, alloy semi-finished product are just placed in stove since room temperature.
4. preparation method according to claim 1, it is characterized in that step(11)The ageing treatment environment is: The anticorrosion aluminium containing praseodymium and ytterbium after solution treatment is covered using particle circle sand hill;Solid solubility temperature is 130 ± 3 DEG C, heating speed Rate is 18 ~ 25 DEG C/min;Soaking time 5 ~ 6 hours, alloy semi-finished product are just placed in stove since room temperature.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104805340A (en) * 2015-05-21 2015-07-29 广西友合铝材有限公司 Rare earth aluminium-magnesium-silicon alloy material and preparation method thereof
CN105695812A (en) * 2016-01-27 2016-06-22 广西平果铝合金精密铸件有限公司 Die-casting aluminum alloy used for engine body and production technique of die-casing aluminum alloy
CN107119216A (en) * 2017-06-27 2017-09-01 中南大学 A kind of high-strength corrosion-resistant erosion aluminium alloy and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104805340A (en) * 2015-05-21 2015-07-29 广西友合铝材有限公司 Rare earth aluminium-magnesium-silicon alloy material and preparation method thereof
CN105695812A (en) * 2016-01-27 2016-06-22 广西平果铝合金精密铸件有限公司 Die-casting aluminum alloy used for engine body and production technique of die-casing aluminum alloy
CN107119216A (en) * 2017-06-27 2017-09-01 中南大学 A kind of high-strength corrosion-resistant erosion aluminium alloy and preparation method thereof

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