CN103627935A - Non-heat-treated heat-resistant aluminium alloy monofilament and preparation method thereof - Google Patents

Non-heat-treated heat-resistant aluminium alloy monofilament and preparation method thereof Download PDF

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CN103627935A
CN103627935A CN201310659285.5A CN201310659285A CN103627935A CN 103627935 A CN103627935 A CN 103627935A CN 201310659285 A CN201310659285 A CN 201310659285A CN 103627935 A CN103627935 A CN 103627935A
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aluminium alloy
thermal treatment
type heat
monofilament
treatment type
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卢云深
韩钰
马光
陈新
祝志祥
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State Grid Corp of China SGCC
Smart Grid Research Institute of SGCC
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State Grid Corp of China SGCC
Smart Grid Research Institute of SGCC
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Abstract

The invention discloses a non-heat-treated heat-resistant aluminium alloy monofilament with electrical conductivity of greater than or equal to 61 percent and a preparation method thereof. The aluminium alloy monofilament comprises the following components: 0.1 to 1.5 percent of Cu, 0.01 to 0.1 percent of Zr, 0.01 to 0.2 percent of B, 0.01 to 0.2 percent of Si, 0.05 to 0.3 percent of Fe, 0.2 to 0.8 percent of Mn, 0.01 to 0.2 percent of Er, 0.01 to 0.2 percent of Gd, any two or three elements of V, Ti and Cr, and the balance of Al and unavoidable trace impurities. The aluminium alloy monofilament prepared by the preparation method has high electrical conductivity, good heat resistance, and tensile strength of 220 MPa, and adopts rare earth gadolinium Gd with lower price to replace rare earth yttrium Y to modify aluminium alloy and reduces raw material cost.

Description

A kind of non-thermal treatment type heat-resisting aluminium alloy monofilament and preparation method thereof
[technical field]
The transmitting line aerial condutor manufacturing technology field that the invention belongs to electrical material, is specifically related to a kind of electric conductivity and is more than or equal to 61%IACS, and tensile strength reaches non-thermal treatment type heat-resisting aluminium alloy monofilament of 220MPa and preparation method thereof.
[background technology]
At present, generally adopt Aluminium Cable Steel Reinforced as power transmission and distribution wire on China's overhead transmission line, Aluminium Cable Steel Reinforced is because common electrician's aluminium conductor tensile strength is low, and the additional steel core of having to produces as strengthening core.Adopt steel core not only to increase wire weight as strengthening core, the magnetic hysteresis that also can cause and eddy-current loss, reduce circuit transmission capacity.For overcoming these problems, conventionally adopt heat-resistant aluminum alloy wire to replace, for improving the thermotolerance in aluminium alloy conductor During Process of Long-term Operation, conventionally in electrician's fine aluminium, add trace alloying element as the recrystallization temperature of the raising aluminium such as zirconium, titanium, although adding of zirconium, titanium alloy element guaranteed thermotolerance, but cause the reduction of aluminium conductor electric conductivity, need further by the form that exists that adds rare earth element and boron to control impurity element, to improve the electric conductivity of heat-resistant aluminum alloy wire.
Chinese patent CN201210189763.6 has announced a kind of high-strength highly-conductive heat-resistant aluminum alloy wire and preparation method thereof, this wire is elementary composition by following weight percent: zirconium Zr is 0.15～0.60%, lanthanum La is 0.03～0.30%, cerium Ce is 0.03～0.30%, yttrium Y is 0.01～0.30%, and iron Fe is 0.05～0.20%, and silicon Si is 0.01～0.10%, other impurity content≤0.10%, all the other are aluminium.Method is: preparation starting material are put into smelting furnace, intensification degasification melting, slag making, slagging-off, continuous casting and rolling and become heat-resisting aluminium alloy pole stock, thermal treatment, drawing wire machine to be drawn into heat-resisting aluminium alloy single line.The tensile strength of prepared heat-resistant aluminum alloy wire reaches 160MPa, and more than electric conductivity can reach 61%IACS, long-time running temperature can reach 180 ℃, and stands and at 280 ℃, heat 1 hour trial running, intensity survival rate > 90%.But in the preparation process of above-mentioned application, prepared aluminum-alloy wire or the tensile strength of wire are low, and in preparation process, required Heating temperature is high and need thermal treatment, and production cost is higher.
Chinese patent CN201210544420.7 has announced strong heat-resisting aluminium alloy monofilament and preparation method thereof in a kind of non-thermal treatment type high conductivity, described aluminium alloy conductor is elementary composition by following weight per-cent: Zr:0.01～0.1%, B:0.01～0.2%, Si:0.01～0.2%, Fe:0.05～0.3%, Mn:0.2～0.5%, Er:0.01～0.15% and/or Y:0.01～0.15%, also contain any 2 kinds or 3 kinds of elements in V, Ti, Cr, all the other are Al and inevitable trace impurity; Described V:0.1～0.15%, Ti:0.01～0.05%, Cr:0.1～0.15%.The tensile strength of prepared heat-resistant aluminum alloy wire is greater than 180MPa, electric conductivity >=61%IACS, heat resisting temperature >=120 ℃ (under 180 ℃ of conditions, being incubated 1 hour residual intensity > 90%).The whole tensile strength of wire that this method is manufactured is low, and only for 100m and following little span distribution line operation, in 110kV and above transmitting line, wire still needs additionally to add the whole conductor tensile strength that improves of the strengthening cores such as steel core conventionally.
[summary of the invention]
For overcoming the problems referred to above, the present invention adopts microalloying, control multiple alloying element content, and adopt rare earth gadolinium, erbium modification, manufacture has electric conductivity >=61%IACS, tensile strength is greater than 220MPa, the non-thermal treatment type heat-resisting aluminium alloy monofilament of heat resisting temperature >=120 ℃ (being incubated 1 hour residual intensity > 90% under 180 ℃ of conditions), for preparing the high-conductive heat-resistant aluminium alloy conductor basis of supplying raw materials, make heat-resistant aluminum alloy wire reach raising transmission capacity, reduce the object of transmission line loss, thereby meet the construction demand of large capacity transmission circuit.
For achieving the above object, the present invention is by the following technical solutions:
A kind of non-thermal treatment type heat-resisting aluminium alloy monofilament, alloying element by following weight per-cent forms: Cu:0.1～1.5%, Zr:0.01～0.1%, B:0.01～0.2%, Si:0.01～0.2%, Fe:0.05～0.3%, Mn:0.2～0.8%, Er:0.01～0.2%, Gd:0.01～0.2%, with any 2 kinds or the 3 kinds of elements selected from V, Ti, Cr, all the other are Al and inevitable trace impurity;
Preferably, described V, Ti, Cr in any 2 kinds or 3 kinds of element wt per-cent sums be 0.01～0.35%.
Another is preferred, and the weight percent of described V, Ti, Cr is respectively V:0.01～0.15%, Ti:0.01～0.05%, Cr:0.01～0.15%.
A kind of non-thermal treatment type heat-resisting aluminium alloy monofilament of the present invention, wherein, Er and Gd weight percent sum be 0.05%～0.3%.
A kind of non-thermal treatment type heat-resisting aluminium alloy monofilament of the present invention, wherein, in V, Ti, Cr, the weight percent sum of any 2 kinds or 3 kinds elements is 0.03%～0.31%.
A preparation method for non-thermal treatment type heat-resisting aluminium alloy monofilament, comprises the steps:
(1) smelt: choose the aluminium ingot of purity >=99.8%, according to aluminium ingot selection of chemical composition alloying element addition, by after aluminium ingot heat fused, at 720～780 ℃, add described alloying element, obtain alloy aluminum liquid;
(2) alloying: stir above-mentioned alloy aluminum liquid, pass into argon gas dehydrogenation, slagging-off, alloying 25～50min at 720～780 ℃;
(3) casting bar processed: by insulation behind mould and die preheating to 200～220 ℃, step (2) gained aluminium liquid is cast in mould and makes aluminium ingot, make and be of a size of Φ 10～60 after 300～450 ℃ of constant temp. heatings extruding, the aluminium alloy rod that 80～200mm grows;
(4) wire drawing: step (3) is made to aluminium alloy rod and carry out the monofilament that wire drawing obtains Φ 2～3mm.
Described in described step (1), the addition sequence of alloying element is: B, Si, Fe, Cu, Mn, V, Ti, Cr element add when temperature rises to 720～740 ℃, and be incubated 10min, Zr, Er, Gd element add 740～780 ℃ of scopes, are incubated 15～35min.
The preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament provided by the invention, wherein, described in step (3), the pouring temperature of aluminium liquid is preferably 740 ℃.
The preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament provided by the invention, wherein, mould and die preheating to 200～220 ℃, the time of insulation is 10～30min.
The preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament provided by the invention, is characterized in that the alloying element adding in described step (1) is simple substance or master alloy.
The preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament provided by the invention, wherein, the addition sequence of alloying element is: finally add Zr, Er and Gd.
The preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament provided by the invention, preferred, wherein, the temperature that adds of the Zr finally adding, Er, Gd alloying element is 780 ℃.
In the preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament provided by the invention, after melting completely, puts into successively by fine aluminium ingot each alloying element, wherein B, Si, Fe, Cu, Mn and Al have eutectic reaction, and alloying element is easier to dissolve, and in fusion process, can directly add in aluminum melt; Zr, Er, Gd element be because fusing point is higher, dissolves very slowly, needs larger overheated could dissolving completely, when temperature of aluminum liquid rises to more than 740 ℃, finally adds its master alloy, treats that furnace temperature rises to 780 ℃, is incubated 15～35min.Adopt aluminium liquid refining agent and pass into argon gas aluminium liquid is carried out dehydrogenation, removes the gred and carry out refining, and use stirrer to stir aluminium liquid, make full and uniformization of alloying element, alloying temperature is 720～780 ℃, after interpolation insulating covering agent, is incubated 25～50min.Mould is heated, prevent that die temperature and temperature of aluminum liquid from having big difference in the aluminium of causing liquid casting cycle and cause shrinkage cavity, mold heated to 200～220 ℃ insulation 10～30min, then carries out the casting of aluminium liquid, is cast into Ф 60～150mm, the aluminium ingot of long 20～80mm.The round aluminium bar that the mode that adopts 300～450 ℃ of constant temp. heatings to push is extruded into Ф 10～60mm, then carries out wire drawing.With speed cold drawn silk on drawing wire machine of 15m/s, by many covers, join mould (Diamond dies), multi-pass draws, and each deflection is 10%～15%, finally obtains the monofilament of Ф 2～3mm.
In the aluminium alloy monofilament that the present invention adopts, zirconium atom radius ratio aluminium atomic radius is bigger, and zirconium spreads with substitute mode in aluminium, and its diffusion activation energy is high, to sub-crystallization grain boundary, separates out trickle Al 3zr phase, it is difficult for agglomeration, and stability is high, can prevent the generation of recrystallize, still effectively pinning dislocation and crystal boundary at higher temperature, hinder distortion and intracrystalline and Grain Boundary Sliding, creep resistance is improved, thereby the resistance toheat of aluminium alloy is improved.Meanwhile, zirconium add the creep-resistant property that can improve aluminium alloy, make aluminium alloy at high temperature also only have very little creep elongation, therefore, can make the spacing of overhead transmission line between electric transmission pole tower bar increase, and keep the less degree of dangling of aluminium alloy conductor;
Si: silicon is the impurity element that in aluminium, content is only second to iron, can improve the castability of aluminium alloy and weld mobility, can also make aluminium alloy have higher mechanical property;
Fe: be the dominant a kind of impurity in commercial-purity aluminium, and be a kind of major impurity in rafifinal.Conventionally with a thick crystal, occur, or exist with aluminium-iron-silicon compound form, they have all improved the hardness of aluminium to a certain extent, but make the Plasticity Decreasing of aluminium.Although there is data to show in actual production, the Fe/Si ratio in aluminium conductor should be 1.3～1.5, does not significantly reduce its electroconductibility when demonstration exceeds this scope in the present invention;
Cu: copper can improve precipitate distribution in aluminium alloy, plays solid solution strengthening effect, obviously promotes the intensity of aluminium alloy, and can promote aluminum alloy anti-stress corrosion performance;
V, Mn, Cr, Ti: these several elements all have crystal grain thinning, improve aluminium alloy room temperature tensile strength and improve stable on heating effect, yet the deleterious effect of every (1%Cr+Ti+Mn+V) is to aluminium electroconductibility deleterious effect 5 times of every 1% silicon.The content that this shows strict these several elements of control has important practical application meaning to guaranteeing the quality of aluminium conductor;
Er, Gd: adding Er and Gd can generate the compound of small and dispersed with Fe, Si element reaction, on the one hand because the Fe in Al, Si are out replaced, Fe, Si are separated out, and has reduced resistivity; Due to the tiny uniform distribution of precipitated phase, can play the effect of crystal grain thinning on the other hand, when guaranteeing that aluminium bar unit elongation is higher, improve the intensity of aluminium alloy;
B: add appropriate Zr can obviously improve the resistance toheat of alloy at aluminium conductor, but Zr add also can alloy electroconductibility have a negative impact, there are some researches show and adding appropriate B containing in the aluminium alloy of Zr, can guarantee to improve its electroconductibility under the stable on heating prerequisite of alloy.Available data shows that the electroconductibility of alloy in the scope of Zr:B=1:2 can not have a negative impact.Excessive B adds having certain grain refining effect containing Zr aluminium alloy, but it can make alloy high-temp strength decreased, makes alloy thermotolerance variation.
Beneficial effect of the present invention: the present invention is retaining high conductivity (61%IACS, 20 ℃), outside good heat resistance (being incubated 1 hour residual intensity > 90% under 180 ℃ of conditions) and the advantage without thermal treatment process, the 180MPa of the aluminium alloy monofilament tensile strength making in patent CN201210544420.7 is promoted to 220MPa, and product be can be applicable in 1000kV and following defeated change distribution line.Adopt the rare earth gadolinium Gd that price is lower to replace rare-earth yttrium Y to aluminium alloy modification, reduced material cost.
[embodiment]
Embodiment 1
In medium frequency induction melting furnace, adding purity is 99.8% fine aluminium ingot, before temperature is remained on to 720 ℃, fine aluminium is melted, when temperature rises to 720 ℃, beginning is in the mode of master alloy, press B, Si, Fe, Cu, Mn, V, Ti, Cr, Zr, Er, the order of Gd, add successively each alloying element, make their final content be: the Zr of weight percent 0.05%, 0.02% Er, 0.06% Gd, 0.05% B, 0.03% Si, 0.055% Fe, 1.1% Cu, 0.1% V, 0.02% Ti, 0.1% Cr and 0.25% Mn, alloying element is that the form with master alloy adds, through stirring, refining, slagging-off, at 760 ℃, after insulation 40min, cast.Before casting, by soft steel mold heated to 200 ℃, be incubated 20min, and temperature of aluminum liquid is down to 740 ℃, then aluminium liquid is poured in mould, form aluminum alloy ingot, by extrusion machine, aluminium alloy rod is carried out to hot extrusion, extrusion temperature is 400 ℃.By the pole stock being extruded into, join successively mould, on high speed wiredrawing bench, carry out cold drawn silk, drawing speed is 15m/s, each sectional shrinkage is 15% left and right, finally obtains the heat-resisting aluminium alloy monofilament of Ф 2.3mm.After testing, the tensile strength of heat-resisting aluminium alloy silk is 220MPa, and electric conductivity is 61.1%IACS, at 180 ℃, is incubated 1 hour, and test intensity is 205MPa, is greater than 90% of former intensity.
Embodiment 2
In medium frequency induction melting furnace, adding purity is 99.8% fine aluminium ingot, before temperature is remained on to 720 ℃, fine aluminium is melted, when temperature rises to 740 ℃, beginning is with the form of simple substance, press B, Si, Fe, Cu, Mn, V, Ti, Cr, Zr, Er, the order of Gd, add successively each alloying element, make their final content be: the Zr of weight percent 0.09%, 0.03% Er, 0.09% Gd, 0.08% B, 0.05% Si, 0.07% Fe, 0.9% Cu, 0.11% V, 0.04% Ti, 0.12% Cr and 0.3% Mn, alloying element is that the form with simple substance adds, through stirring, refining, slagging-off, at 750 ℃, after insulation 45min, cast.Before casting, by soft steel mold heated to 210 ℃, insulation 20min, then pours aluminium liquid in mould into, and temperature of aluminum liquid is down to 740 ℃, forms aluminum alloy ingot, by extrusion machine, aluminium alloy rod is carried out to hot extrusion, and extrusion temperature is 400 ℃.By the pole stock being extruded into, join successively mould, on high speed wiredrawing bench, carry out cold drawn silk, drawing speed is 15m/s, each sectional shrinkage is 15% left and right, finally obtains the heat-resisting aluminium alloy monofilament of Ф 2.5mm.After testing, the tensile strength of heat-resisting aluminium alloy silk is 225MPa, and electric conductivity is 61.2%IACS, at 180 ℃, is incubated 1 hour, and test intensity is 206MPa, is greater than 90% of former intensity.
Embodiment 3
In medium frequency induction melting furnace, adding purity is 99.8% fine aluminium ingot, before temperature is remained on to 720 ℃, fine aluminium is melted, when temperature rises to 725 ℃, beginning is in the mode of master alloy, press B, Si, Fe, Cu, Mn, V, Ti, Cr, Zr, Er, the order of Gd, add successively each alloying element, make their final content be: the Zr of weight percent 0.07%, 0.10% Er, 0.10% Gd, 0.15% B, 0.15% Si, 0.21% Fe, 1.1% Cu, 0.12% V, 0.05% Ti, 0.14% Cr and 0.5% Mn, its rare earth elements is that the form with master alloy adds, all the other alloying elements are that the form with master alloy adds, through stirring, refining, slagging-off, at 745 ℃, after insulation 50min, cast.Before casting, by soft steel mold heated to 220 ℃, insulation 20min, is down to 740 ℃ by temperature of aluminum liquid, then aluminium liquid is poured in mould, forms aluminum alloy ingot, by extrusion machine, aluminium alloy rod is carried out to hot extrusion, and extrusion temperature is 420 ℃.By the pole stock being extruded into, join successively mould, on high speed wiredrawing bench, carry out cold drawn silk, drawing speed is 15m/s, each sectional shrinkage is 15% left and right, finally obtains the heat-resisting aluminium alloy monofilament of Ф 2.1mm.After testing, the tensile strength of heat-resisting aluminium alloy silk is 225MPa, and electric conductivity is 61.5%IACS, at 180 ℃, is incubated 1 hour, and test residual strength is 208MPa, is greater than 90% of former intensity.
Embodiment 4
In medium frequency induction melting furnace, adding purity is 99.8% fine aluminium ingot, before temperature is remained on to 720 ℃, fine aluminium is melted, when temperature rises to 750 ℃, beginning is in the mode of master alloy, press B, Si, Fe, Cu, Mn, V, Ti, Cr, Zr, Er, the order of Gd, add successively each alloying element, make their final content be: the Zr of weight percent 0.07%, 0.10% Er, 0.12% Gd, 0.15% B, 0.15% Si, 0.21% Fe, 1.0% Cu, 0.12% V, 0.05% Ti, 0.14% Cr and 0.5% Mn, its rare earth elements is that the form with master alloy adds, all the other alloying elements are that the form with master alloy adds, through stirring, refining, slagging-off, at 750 ℃, after insulation 40min, cast.Before casting, by soft steel mold heated to 210 ℃, insulation 30min, is down to 740 ℃ by temperature of aluminum liquid, then aluminium liquid is poured in mould, forms aluminum alloy ingot, by extrusion machine, aluminium alloy rod is carried out to hot extrusion, and extrusion temperature is 350 ℃.By the pole stock being extruded into, join successively mould, on high speed wiredrawing bench, carry out cold drawn silk, drawing speed is 15m/s, each sectional shrinkage is 15% left and right, finally obtains the heat-resisting aluminium alloy monofilament of Ф 2.2mm.After testing, the tensile strength of heat-resisting aluminium alloy silk is 228MPa, and electric conductivity is 61.1%IACS, at 180 ℃, is incubated 1 hour, and test residual strength is 209MPa, is greater than 90% of former intensity.
Embodiment 5
In medium frequency induction melting furnace, adding purity is 99.8% fine aluminium ingot, before temperature is remained on to 720 ℃, fine aluminium is melted, when temperature rises to 725 ℃, beginning is in the mode of master alloy, press B, Si, Fe, Cu, Mn, V, Ti, Cr, Zr, the order of Gd, add successively each alloying element, make their final content be: the Zr of weight percent 0.07%, 0.10% Er, 0.08% Gd, 0.15% B, 0.15% Si, 0.21% Fe, 1.0% Cu, 0.12% V, 0.05% Ti, 0.14% Cr and 0.5% Mn, its rare earth elements is that the form with master alloy adds, all the other alloying elements are that the form with master alloy adds, through stirring, refining, slagging-off, at 755 ℃, after insulation 40min, cast.Before casting, by soft steel mold heated to 220 ℃, insulation 30min, is down to 740 ℃ by temperature of aluminum liquid, then aluminium liquid is poured in mould, forms aluminum alloy ingot, by extrusion machine, aluminium alloy rod is carried out to hot extrusion, and extrusion temperature is 350 ℃.By the pole stock being extruded into, join successively mould, on high speed wiredrawing bench, carry out cold drawn silk, drawing speed is 15m/s, each sectional shrinkage is 15% left and right, finally obtains the heat-resisting aluminium alloy monofilament of Ф 2.3mm.After testing, the tensile strength of heat-resisting aluminium alloy silk is 233MPa, and electric conductivity is 61.0%IACS, at 180 ℃, is incubated 1 hour, and test residual strength is 212MPa, is greater than 90% of former intensity.
It in form, is the Data Comparison of embodiment.
Below be only the detailed description that preferred embodiment of the present invention is carried out, but the present invention is not limited to above embodiment.It should be understood that the various modifications that those skilled in the art makes, still belong to scope of the present invention in the spirit and scope situation of claim that does not depart from the application.

Claims (10)

1. a non-thermal treatment type heat-resisting aluminium alloy monofilament, it is characterized in that described aluminium alloy conductor is comprised of the alloying element of following weight per-cent: Cu:0.1～1.5%, Zr:0.01～0.1%, B:0.01～0.2%, Si:0.01～0.2%, Fe:0.05～0.3%, Mn:0.2～0.8%, Er:0.01～0.2%, Gd:0.01～0.2%, with any 2 kinds or the 3 kinds of elements selected from V, Ti, Cr, all the other are Al and inevitable trace impurity.
2. a kind of non-thermal treatment type heat-resisting aluminium alloy monofilament as claimed in claim 1, it is characterized in that described V, Ti, Cr in any 2 kinds or 3 kinds of element wt per-cent sums be 0.01～0.35%.
3. a kind of non-thermal treatment type heat-resisting aluminium alloy monofilament as claimed in claim 1, the weight percent that it is characterized in that described V, Ti, Cr is V:0.01～0.15%, Ti:0.01～0.05%, Cr:0.01～0.15%.
4. a kind of non-thermal treatment type heat-resisting aluminium alloy monofilament as claimed in claim 1, the weight percent sum that it is characterized in that described Er and Gd is 0.05%～0.3%.
5. a kind of non-thermal treatment type heat-resisting aluminium alloy monofilament as claimed in claim 1, the weight percent sum that it is characterized in that any 2 kinds or 3 kinds elements in described V, Ti, Cr is 0.03%～0.31%.
6. the preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament as claimed in claim 1, comprises the steps:
(1) smelt: after choosing the aluminium ingot fusing of purity >=99.8%, at 720～780 ℃, add described alloying element, obtain alloy aluminum liquid;
(2) alloying: stir above-mentioned alloy aluminum liquid, pass into argon gas dehydrogenation, slagging-off, alloying 25～50min at 720～780 ℃;
(3) casting bar processed: will be incubated behind mould and die preheating to 200～220 ℃, step (2) gained temperature of aluminum liquid is down to 700～740 ℃, be cast in mould and make aluminium ingot, after 300 ℃～450 ℃ constant temp. heating extruding, make and be of a size of Φ 10～60, the aluminium alloy rod that 80～400mm is long;
(4) wire drawing: step (3) is made to aluminium alloy rod and carry out the monofilament that wire drawing obtains Φ 2～3mm.
7. the preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament as claimed in claim 6, the addition sequence that it is characterized in that alloying element described in step (1) is: B, Si, Fe, Cu, Mn, V, Ti, Cr element add when temperature rises to 720～740 ℃, and be incubated 10min, Zr, Er, Gd element add 740～780 ℃ of scopes, are incubated 15～35min.
8. the preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament as claimed in claim 6, the pouring temperature that it is characterized in that aluminium liquid described in step (3) is 740 ℃.
9. the preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament as claimed in claim 6, is characterized in that described mould and die preheating to 200～220 ℃, and the time of insulation is 10～30min.
10. the preparation method of non-thermal treatment type heat-resisting aluminium alloy monofilament as claimed in claim 6, is characterized in that the alloying element adding in described step (1) is simple substance or master alloy.
CN201310659285.5A 2013-12-09 2013-12-09 Non-heat-treated heat-resistant aluminium alloy monofilament and preparation method thereof Pending CN103627935A (en)

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