CN102534318A - High-strength, high-conductivity and heat-resistant aluminum alloy conductor material and preparation method thereof - Google Patents
High-strength, high-conductivity and heat-resistant aluminum alloy conductor material and preparation method thereof Download PDFInfo
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- CN102534318A CN102534318A CN2012100768905A CN201210076890A CN102534318A CN 102534318 A CN102534318 A CN 102534318A CN 2012100768905 A CN2012100768905 A CN 2012100768905A CN 201210076890 A CN201210076890 A CN 201210076890A CN 102534318 A CN102534318 A CN 102534318A
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Abstract
The invention relates to a high-strength, high-conductivity and heat-resistant aluminum alloy conductor material and a preparation method thereof, and belongs to the technical field of alloy materials. The conductor material comprises the following components in percentage by weight: 0.2 to 0.3 percent of Zr, 0.15 to 0.25 percent of Er, less than 0.3 percent of impurities and the balance of aluminum. The preparation method comprises the following steps of: adding an AlEr intermediate alloy and an AlZr intermediate alloy in the process of smelting the aluminum, smelting at the temperature of 780+/-10 DEG C, preserving heat for 30 minutes, and casting; and performing homogenization treatment, rolling and heat treatment on an ingot in turn. Er and Zr in the component ratio are compositely microalloyed, a large number of precipitated phases which are distributed in a dispersed mode can be precipitated by the process, a large number of deformation structures can be stored, and the high conductivity (59.6 to 60 percent international annealed copper standard IACS), high strength (Vickers hardness 62.5 to 66.5) and heat resistance (capability of resisting the temperature of 375 DEG C in a short term and resisting the temperature of 225 DEG C in a long term) of the alloy are kept simultaneously.
Description
Technical field
The present invention relates to the high strength and high conductivity rate heat-resisting aluminium alloy conductor material that a kind of electric wire is used, belong to technical field of alloy material.
Technical background
High-strength temperature-resistant electrician duraluminum is to have than high-tensile; The aluminium alloy conductor material that fine resistance toheat is arranged again; Process have use temperature height, good heat resistance behind the lead, outstanding advantage such as current capacity is big, tensile strength is higher, light weight, the sag characteristic is good and welding property, corrosion resisting property be good; Therefore on transmitting line, use the high strength heat resistant alloy twisted wire can significantly increase capacity of trunk; And etching problem and the magnetic hysteresis loss that can avoid Aluminium Cable Steel Reinforced to bring receive common concern in the world.But according to IEC 62004 standards; The electric conductivity of the at present used high strength heat resistant alloy lead AT2 of intensity more than 220MPa is 55%IACS only; And high conductivity heat-resisting aluminium alloy intensity is not high, and electric conductivity has only about 170MPa greater than two kinds of heat-resisting aluminium alloy AT1 and the AT3 intensity of 60%IACS.Do not have existing HS of a kind of aluminium alloy conductor material and thermotolerance, have high conductivity simultaneously, limited the range of application of heat-resistant aluminum alloy wire as capacity-improving conducting wires.
This is because there are incompatibility in intensity and electric conductivity between improving, and improve intensity and must improve the content of alloying element or improve the machining deformation amount, and the raising of the raising of alloying element content and amount of finish all will make specific conductivity descend.Simultaneously, though the interpolation of Zr can improve the resistance toheat of alloy in the general refractory alloy lead, the ageing strengthening effect of the Al-Zr alloy that Zr content is lower is relatively poor, and effect that it improves intensity is also not obvious; The content that increases the Zr element can play certain precipitation strength effect, but the electric conductivity of alloy significantly descends.This means that intensity and stable on heating raising all will make the corresponding decline of specific conductivity.Therefore to obtain the aluminium alloy conductor material of HS, high heat resistance ability, high conductivity triplicity; Then must find a kind of new guiding alloying constituent and preparation method thereof, under the condition of the alloying element that adds very small amount, just can separate out the strengthening phase that a large amount of even dispersion distribute and have thermostability.
Research shows that the interpolation of Er can increase the intensity of alloy, and is and very little to the influence of specific conductivity, and the compound interpolation of Er, Zr can further improve the quantity of alloy from precipitated phase, thereby improve the intensity and the resistance toheat of alloy.Chinese patent CN102230113A has announced a kind of Al-Er-Zr alloy conductor, because the problem of its composition proportion, its electric conductivity and resistance toheat are better, but intensity is lower.The present invention adds an amount of Er, Zr micro alloying element in fine aluminium, and through appropriate preparation method,, high conductivity high-strength to obtain, heat-resisting aluminium alloy conductor material.
Summary of the invention
The objective of the invention is to overcome the deficiency of existing heat-resisting aluminium alloy conductor material technology,, seek and a kind ofly can reach high-strength, high conductivity, heat-stable aluminium alloy conductor material and preparation method thereof simultaneously through the method for Er, Zr combined microalloying.
High-strength, high conductivity provided by the present invention, heat-resisting Al-Er-Zr alloy conductor material is characterized in that comprise following quality percentage composition component: Zr 0.2～0.3%; Er0.15～0.25%; Foreign matter content＜0.3%; Surplus is an aluminium.
The preparation method of above-mentioned high-strength, the high conductivity of the present invention, heat-resisting Al-Er-Zr alloy conductor material; It is characterized in that; May further comprise the steps: in the process of melting aluminium, add AlEr and AlZr master alloy, smelting temperature is 780 ± 10 ℃, arrives smelting temperature insulation casting after 30 minutes; Successively ingot casting is carried out homogenizing processing, rolling, thermal treatment,, high conductivity heat-resisting aluminium alloy conductor high-strength to obtain subsequently.
Among the preparation method of high-strength, high conductivity provided by the present invention, heat-resisting Al-Er-Zr alloy conductor material, it is 635 ± 10 ℃ that homogenizing is handled preferred temperature, and the time is 20 hours, and processing finishes the back shrend.
Among the preparation method of high-strength, high conductivity provided by the present invention, heat-resisting Al-Er-Zr alloy conductor material, the cold rolling mode of preferred rolling employing, deflection is 70%; Heat-treatment temperature range after preferred rolling is between 200～300 ℃, and the time is 3 hours.
Used fine aluminium foreign matter content＜0.3% among the preparation method of high-strength, high conductivity provided by the present invention, heat-resisting Al-Er-Zr alloy conductor material, AlEr that is added and AlZr master alloy are respectively Al6%Er and Al4%Zr master alloy.
The present invention is owing to adopted the Er and the Zr combined microalloying of mentioned component proportioning; Can separate out the precipitated phase that a large amount of disperses distribute through above-mentioned technological process; Deformation structure can preserve in a large number simultaneously; So in the high conductivity that keeps alloy (specific conductivity is between 59.6～60%IACS), can have higher intensity (hardness is between Vickers' hardness 62.5～66.5) and resistance toheat (heat-resisting in short-term 375 ℃, long-term heat-resisting 225 ℃) simultaneously.Adopt suitable Zr addition among the present invention, and compound through with Er, alloying element can be separated out fully, so alloy can keep high conductivity.Simultaneously a large amount of disperse precipitated phases can play the effect of reinforcement and stabilizing tissue, and the intensity of alloy conductor and resistance toheat can both be greatly improved.Simultaneously because adopt Er, Zr is compound and distortion combines mode, can be so that heat treatment time is compared the heat-resisting aluminium alloy conductor that only contains Zr to be shortened greatly, thus lower energy consumption, practice thrift cost.
Description of drawings
Fig. 1: the changes in hardness curve under the Al0.25Er0.2Zr differing temps behind the thermal treatment 3h;
Fig. 2: the changes in hardness curve under the Al0.25Er0.3Zr differing temps behind the thermal treatment 3h;
Fig. 3: the changes in hardness curve behind the Al0.15Er0.28Zr heat treatments at different 3h;
Fig. 4: (1h) in short-term resistance toheat curve of each composition alloy;
Fig. 5: (500h) resistance toheat curve during each composition alloy long.
Embodiment
Instance 1: adopt plumbago crucible melting and iron mould casting to prepare alloy cast ingot, raw materials used is fine aluminium and Al-6Er and Al-4Zr master alloy, and smelting temperature is 780 ± 10 ℃.Be incubated 30 minutes after arriving smelting temperature, cast with swage then.The mass percent of each element is: 0.20%Zr, and 0.25%Er, Fe, Si and other foreign matter contents＜0.3%, surplus is an aluminium.Ingot casting was handled 20 hours 635 ± 10 ℃ of homogenizing, and shrend is to room temperature, and adopting cold rolling mode rolling reduction then is 70%; Rolling back is to heat-treat between 200～500 ℃ in TR, and the time is 3 hours.Fig. 1 has provided heat treated hardness curve under the differing temps, shows that rolling back can reach the highest hardness in 3 hours 200～300 ℃ of thermal treatments, and the processing of higher temperature then makes the strength degradation of alloy.Alloy all more than 60%IACS, has higher conductivity in the specific conductivity after the thermal treatment.
Instance 2: adopt plumbago crucible melting and iron mould casting to prepare alloy cast ingot, raw materials used is fine aluminium and Al-6Er and Al-4Zr master alloy, and smelting temperature is 780 ± 10 ℃.Be incubated 30 minutes after arriving smelting temperature, cast with swage then.The mass percent of each element is: 0.30%Zr, and 0.25%Er, Fe, Si and other foreign matter contents＜0.3%, surplus is an aluminium.Ingot casting was handled 20 hours 635 ± 10 ℃ of homogenizing, and shrend is to room temperature, and adopting cold rolling mode rolling reduction then is 70%; Rolling back is to heat-treat between 200～500 ℃ in TR, and the time is 3 hours.Fig. 2 has provided heat treated hardness curve under the differing temps.Show that rolling back can reach the highest hardness in 3 hours 200～300 ℃ of thermal treatments, the processing of higher temperature then makes the strength degradation of alloy.Alloy all more than 59.5%IACS, has higher conductivity in the specific conductivity after the thermal treatment.
Instance 3: adopt plumbago crucible melting and iron mould casting to prepare alloy cast ingot, raw materials used is fine aluminium and Al-6Er and Al-4Zr master alloy, and smelting temperature is 780 ± 10 ℃.Be incubated 30 minutes after arriving smelting temperature, cast with swage then.The mass percent of each element is: 0.28%Zr, and 0.15%Er, Fe, Si and other foreign matter contents＜0.3%, surplus is an aluminium.Ingot casting was handled 20 hours 635 ± 10 ℃ of homogenizing, and shrend is to room temperature, and adopting cold rolling mode rolling reduction then is 70%; Rolling back is to heat-treat between 200～500 ℃ in TR, and the time is 3 hours.Fig. 3 has provided heat treated hardness curve under the differing temps, shows that rolling back can reach the highest hardness in 3 hours 200～300 ℃ of thermal treatments, and the processing of higher temperature then makes the strength degradation of alloy.Alloy all more than 59.8%IACS, has higher conductivity in the specific conductivity after the thermal treatment.
Instance 4: each composition alloy in the instance 1 to 3 was handled 20 hours 635 ± 10 ℃ of homogenizing, and shrend is to room temperature, and adopting cold rolling mode rolling reduction then is 70%; Rolling back is 250 ℃ of thermal treatments 3 hours in TR.Alloy to above-mentioned processing was annealed 1 hour at 250～575 ℃; Its changes in hardness is as shown in Figure 4; It is thus clear that in 250～375 ℃ of TRs; Hardness of alloy does not almost obviously descend, and the temperature alloy rigidity just has significant decline more than 375 ℃, and this shows that the short-term heat resisting temperature of alloy can reach 375 ℃.
Instance 5: 635 ± 10 ℃ of homogenizing of each composition alloy in the instance 1 to 3 were handled 20 hours, and shrend is to room temperature, and adopting cold rolling mode rolling reduction then is 70%; Rolling back is 250 ℃ of thermal treatments 3 hours in TR.Alloy to above-mentioned processing was annealed 500 hours at 150～350 ℃; Its changes in hardness is as shown in Figure 5; It is thus clear that in 150～225 ℃ of TRs; Hardness of alloy does not almost obviously descend (less than 10%), and the temperature alloy rigidity just has significant decline more than 225 ℃, and this shows that the long-term heat resisting temperature of alloy can reach 225 ℃.
Claims (5)
1. high-strength a, high conductivity, heat-resisting aluminium alloy conductor material is characterized in that, comprise following mass percentage content component: 0.2～0.3%Zr, 0.15～0.25%Er, and foreign matter content＜0.3%, surplus is an aluminium.
2. the described aluminium alloy conductor preparation methods of claim 1 is characterized in that, may further comprise the steps: in the process of melting aluminium, add AlEr and AlZr master alloy, smelting temperature is 780 ± 10 ℃, insulation casting after 30 minutes behind the arrival smelting temperature; Successively ingot casting is carried out homogenizing processing, rolling, thermal treatment subsequently.
3. according to the described aluminium alloy conductor preparation methods of claim 2, it is characterized in that: described homogenizing cast ingot temperature is 635 ± 10 ℃, and the time is 20 hours, and processing finishes the back shrend.
4. according to the described aluminium alloy conductor preparation methods of claim 2, it is characterized in that: the cold rolling mode of said rolling employing, deflection is 70%; Described heat-treatment temperature range after rolling is between 200～300 ℃, and the time is 3 hours.
5. according to the described aluminium alloy conductor preparation methods of claim 2, it is characterized in that: used fine aluminium foreign matter content＜0.3%, AlEr that is added and AlZr master alloy are respectively Al6%Er and Al4%Zr master alloy.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103407A (en) * | 2013-03-12 | 2013-05-15 | 北京工业大学 | High-thermal-stability wrought aluminium alloy and preparation method thereof |
| CN104087770A (en) * | 2014-06-28 | 2014-10-08 | 北京工业大学 | Preparation method of high-conductivity heat-resistant aluminum alloy |
| CN104561669A (en) * | 2014-12-27 | 2015-04-29 | 北京工业大学 | Heat treatment process of Al-Er-Zr-Si alloy |
| WO2016032407A1 (en) * | 2014-08-29 | 2016-03-03 | TALUM d.d. kidričevo | Addition of alloying element to reduce the decrease of mechanical properties in drying of coloured aluminium containers |
| CN106756265A (en) * | 2016-11-28 | 2017-05-31 | 北京工业大学 | The Al Sc Zr Yb alloys and its Technology for Heating Processing of a kind of high performance-price ratio high-strength highly-conductive |
| CN107665747A (en) * | 2017-09-22 | 2018-02-06 | 太仓捷公精密金属材料有限公司 | A kind of high conductivity heat resistant aluminum alloy conductor material |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021443A (en) * | 2010-10-15 | 2011-04-20 | 北京工业大学 | Al-Er-Zr alloy and ageing strengthening process thereof |
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- 2012-03-21 CN CN2012100768905A patent/CN102534318A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021443A (en) * | 2010-10-15 | 2011-04-20 | 北京工业大学 | Al-Er-Zr alloy and ageing strengthening process thereof |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103103407A (en) * | 2013-03-12 | 2013-05-15 | 北京工业大学 | High-thermal-stability wrought aluminium alloy and preparation method thereof |
| CN104087770A (en) * | 2014-06-28 | 2014-10-08 | 北京工业大学 | Preparation method of high-conductivity heat-resistant aluminum alloy |
| CN104087770B (en) * | 2014-06-28 | 2016-04-20 | 北京工业大学 | A kind of preparation method of high conductivity heat-resisting aluminium alloy |
| WO2016032407A1 (en) * | 2014-08-29 | 2016-03-03 | TALUM d.d. kidričevo | Addition of alloying element to reduce the decrease of mechanical properties in drying of coloured aluminium containers |
| CN104561669A (en) * | 2014-12-27 | 2015-04-29 | 北京工业大学 | Heat treatment process of Al-Er-Zr-Si alloy |
| CN106756265A (en) * | 2016-11-28 | 2017-05-31 | 北京工业大学 | The Al Sc Zr Yb alloys and its Technology for Heating Processing of a kind of high performance-price ratio high-strength highly-conductive |
| CN107665747A (en) * | 2017-09-22 | 2018-02-06 | 太仓捷公精密金属材料有限公司 | A kind of high conductivity heat resistant aluminum alloy conductor material |
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Application publication date: 20120704 |