CN105441702A - Al-Mg alloy material containing rare earth erbium, zirconium and manganese and preparation treatment method thereof - Google Patents

Al-Mg alloy material containing rare earth erbium, zirconium and manganese and preparation treatment method thereof Download PDF

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Publication number
CN105441702A
CN105441702A CN201410512569.6A CN201410512569A CN105441702A CN 105441702 A CN105441702 A CN 105441702A CN 201410512569 A CN201410512569 A CN 201410512569A CN 105441702 A CN105441702 A CN 105441702A
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alloy
rare earth
zirconium
manganese
temperature
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温兴琴
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温兴琴
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Abstract

The invention discloses an Al-Mg alloy material containing rare earth erbium, zirconium and manganese. The Al-Mg alloy material comprises, by mass, 99.7% of industrial pure Al and Al-5%Zr, Al-10%Mn and Al-10%Er intermediate alloys. A preparation treatment method of the Al-Mg alloy material comprises melting industrial pure aluminum with a mass fraction of 99.7% after boronation and Al-5%Zr, Al-10%Mn and Al-10%Er intermediate alloys at a melting temperature of 800 DEG C through a corundum crucible in a well-type resistance furnace, pressing the intermediate alloys at a temperature of about 750 DEG C into a metal liquid, carrying out stirring for 3min, adding hexachloroethane into the melt, carrying out refining, carrying out slag removal and pouring the melt into a steel mold pre-heated to a temperature of about 280 DEG C.

Description

A kind of Al-Mg alloy material containing rare earth erbium, zirconium and manganese element and prepare treatment process
Technical field
The present invention relates to a kind of Al-Mg alloy material containing rare earth erbium, zirconium and manganese element and prepare treatment process.
Background technology
Along with the sharp increase of electric power, electric appliance demand, transmitting line is day by day to high strength, high heat-resisting, high live amount future development [1], but the current transmitting line of China is still based on most widely used common overhead aluminum wire substantially, because this wire intensity is low, poor heat resistance, use and be restricted [2-3].High strength heat resistant alloy wire is a kind of extraordinary wire possessing higher-strength and operating temperature, but certainly will cause the reduction of electric conductivity while promoting intensity and thermotolerance.Research shows [4-5], and interpolation trace rare-earth and Zr, Mn element are the effective ways improving aluminium alloy electrician round bar over-all properties.Round aluminum rod is one of most important electric wire, cable starting material, the quality of its performance by directly affecting electric wire, can the quality of cable touch the mark.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of Al-Mg alloy material containing rare earth erbium, zirconium and manganese element and prepare treatment process.
Technical scheme of the present invention is: a kind of Al-Mg alloy material containing rare earth erbium, zirconium and manganese element, its constituent mass mark is: commercial-purity aluminium, Al-5%Zr, Al-10%Mn and Al-10%Er master alloy of 99.7%.
A kind of Al-Mg alloy material containing rare earth erbium, zirconium and manganese element prepare treatment process, starting material are that after boronation, massfraction is commercial-purity aluminium, Al-5%Zr, Al-10%Mn and Al-10%Er master alloy of 99.7%, during melting, in well formula resistance furnace, melting is carried out with corundum crucible, smelting temperature controls at 800 DEG C, and master alloy is pressed into molten metal by about 750 DEG C, stirs three minutes, add hexachloroethane and carry out refining, be poured into after skimming in the punching block being preheated to about 280 DEG C.
Beneficial effect of the present invention: (1) adds quantitative Mn(1.9% in Al-Mg alloy), Er(0.2%) tissue obtains obvious refinement, and forms AlMn2, ErMn2 and ErFe2 phase, strength of alloy and resistance toheat raise; Adding separately Mn makes electric conductivity, elongation reduce, and after compound adds Er, electric conductivity and elongation obtain lifting to a certain extent.
(2), after compound adds Zr on quantitative Er, Mn basis of interpolation, organize by continuation refinement, and form Al3Zr particle distribution in grain boundaries; When adding 0.12%Zr, alloy over-all properties is relatively good, and tensile strength reaches 141MPa, and elongation is 36%, and electric conductivity is 49.5IACS%, and heat resisting temperature is 121 DEG C; When adding 0.18%Zr, forming thick Al3Zr particle and in short handle or block distribution together with being interweaved with Compound Phase, neighbouring α-Al matrix being squeezed into lamellar, causing mechanical properties decrease.
Accompanying drawing explanation
Fig. 1 is the microstructure of Al and Al-X alloy;
Fig. 2 is the high power SEM scanning spectra of Al-1.9Mn-0.2Er-0.18Zr alloy;
Fig. 3 is the microscopic appearance (SEM) of Al and Al-X alloy;
Fig. 4 is the X ray diffracting spectrum of Al and Al-X alloy.
Embodiment
Starting material are that after boronation, massfraction is commercial-purity aluminium (table 1), Al-5%Zr, Al-10%Mn and Al-10%Er master alloy of 99.7%.Rare earth Er and Zr, Mn name and actual constituent as following table 2.During melting, in well formula resistance furnace, melting is carried out with corundum crucible, smelting temperature controls at 800 DEG C, master alloy is pressed into molten metal by about 750 DEG C, stir three minutes, add hexachloroethane (C2Cl6) and carry out refining, be poured in the punching block being preheated to about 280 DEG C after skimming, often kind of state is cast the aluminium bar of 5 φ 12mm × 120mm; During test performance, data are averaged, and aluminium bar two ends respectively amputate Ф 17mm × 10mm, to ensure to test accuracy.
Adopt ICAP-6300 type entirely to compose direct-reading type ICP spectrograph and detect the actual recovery rate adding trace element; Under room temperature, with CSS-4410 electronic universal material experiment-machine beta alloy wax-anti dispersant, rate of extension is 1mm/min; Utilize the resistance toheat of UTM4304 creep experiments under high temperature machine beta alloy; Under room temperature, with Sigma2008B/C numeral eddy current conductivity metal instrument beta alloy electric property; Cutting metallographic specimen, is the HF aqueous corrosion of 4% by volume fraction after grinding polishing, observes microstructure morphology and Elemental redistribution by Olympus-BH2 opticmicroscope, KYKY-2800B scanning electron microscope, APOLLO-10X energy spectrometer; Utilize the thing phase composite in X ' PertPROX ray polycrystalline diffractometer analysis alloy.
Fig. 1 is the Al-Mg alloy microscopic structure figure after adding Er, Mn and Zr element, observes the effect that known Er, Mn and Zr have crystal grain thinning.Pure Al-Mg alloy grain is relatively thick, and has inclusion or space (Fig. 1 a) at part grain boundaries; During independent interpolation Mn, crystal grain is by refinement (Fig. 1 b); Compound is added after Er, Mn, and thinning effect is more obvious, and observes secondary phase uniform particle and be distributed in crystal boundary and near zone thereof (Fig. 1 b, c); Add the Zr of 0.06% and 0.12%, crystal grain becomes more and more tiny (Fig. 1 d, e); After adding the Zr of 0.18%, grain refining effect not obvious (Fig. 1 f), and secondary phase particle is short handle or the distribution of thick block-shape morphology, and neighbouring α-Al is squeezed into lamellar (Fig. 2), carrying out EDS analysis (in table 36 points) to this place, may be the phases such as MnAl2, Al3Zr and ErMn2 by each Elements Atom mark than this compound of deducibility.
Fig. 3 is the microscopic appearance (SEM) of Al-Mg alloy after interpolation Er, Mn and Zr element, and table 3 is EDAX results (atomic percent).To observe in Fig. 3 b and table 32,3 energy spectrum analysiss are known, most of Er, Mn Element segregation is in crystal boundary and near zone thereof; After adding 0.12%Zr, crystal grain becomes tiny, and secondary phase particle is uniformly distributed in grain boundaries (Fig. 3 c) with fine particle shape form; When the addition of Zr reaches 0.18%, the size of Al3Zr phase and quantity increase, and at grain boundaries dense distribution (Fig. 3 d), to wherein 6 carry out energy spectrum analysis: aluminium element roughly conforms to XRD material phase analysis (Fig. 4) result with the atomic ratio of other elements, this grain boundaries secondary phase particle should be the phases such as MnAl2, Al3Zr, ErFe2 and ErMn2, and these are thick by neighbouring α-Al crimp, when alloy reaches critical stress by external force, form formation of crack, cause mechanical properties decrease.
Table 3 is the test result of Al-Mg alloy mechanics and electric property after interpolation Er, Mn and Zr element.Can find out: add Mn and tensile strength is significantly raised, elongation and electric conductivity decline to a great extent; After adding quantitative Er, electric conductivity, tensile strength and thermotolerance promote all to some extent; Along with the increase of Zr content, electric conductivity reduces, and wax-anti dispersant is all first increase to fall trend afterwards; No. 5 samples have better comprehensive mechanical property, and tensile strength reaches 141MPa, and elongation is 36.5%; No. 3 samples have better conductivity, and electric conductivity is 51.57IACS%.Visible, Er and Mn, the Zr of suitable addition can improve the mechanical property of Al-Mg alloy; Independent interpolation Mn makes electric conductivity decline to a great extent, and compound adds rare earth Er electric conductivity and gos up to some extent, continues to add Zr and electric conductivity is declined by a small margin.
Heat resisting temperature evaluates the performance index of conductor material when comparatively high temps works, refer to the Heating temperature that alloy is corresponding when the survival rate of intensity is 90% after held for some time at such a temperature, the heat resisting temperature of cond aluminium is higher, and its use temperature is higher, and current capacity is also larger.Table 4 is depicted as the heat resisting temperature of different-alloy sample, and wherein No. 5 sample (Al-1.9Mn-0.2Er-0.12Zr alloy) heat resisting temperatures are the highest, reach 121 DEG C.
Experimentally result can be seen: appropriate Er, Mn and Zr serve the effect of grain refining in Al-Mg alloy, and excessive interpolation Zr Grain Refinement Effect weakens.Analytical results shows: after Mn adds Al-Mg alloy, and because Mn and Al is face-centred cubic structure, displacement solid solution reaction occurs a part of Mn and α-Al, play solution strengthening effect, mechanical property promotes, but the scattering that lattice distortion can increase electronics occurs around aluminium atom, and conductivity declines; Another part Mn and α-Al forms MnAl2 phase particle distribution in grain boundary area, and during viscous deformation, these particles produce inhibition to Grain Boundary Sliding, need to consume more energy and viscous deformation just can be made to proceed, and the intensity of alloy and resistance toheat improve.
Al is face-centred cubic structure, and rare earth is close-packed hexagonal structure, therefore rare earth solid solubility in Al and Alalloy is less, and after rare earth Er adds alloy, most of rare-earth enrichment can strengthen crystal boundary at grain boundaries; And rare earth Er belongs to surface active element, easily in phase interface or grain boundaries absorption segregation, fill up the defect on interface, hinder grain growth, have refining effect to crystal grain, alloy mechanical property and resistance toheat increase; In addition, small part rare earth Er consumes the element such as Mn, Fe in liquid, form ErMn2 and ErFe2 phase, this not only reduces lattice distortion, favourable to electric conductivity, and these are that the high melting compound of Dispersed precipitate has good thermostability, mechanics and resistance toheat are also had a certain upgrade effect.
The impact adding alloy heat resisting temperature of Zr is remarkable, 0.12%Zr is added in Al-Mg alloy, form metastable A13Zr phase particle distribution in grain boundaries, A13Zr is the intermetallic compound that a kind of thermostability is higher, can effectively pin crystal boundary and dislocation, hinder instracrystalline slip and slippage between crystallites, prevent the generation of recrystallize, therefore the tensile strength that still kept of alloy at relatively high temperatures; But add excessive Zr(0.18%) after, a large amount of thick A13Zr phase particle and other compound formation short handles or massive phase are enriched on crystal boundary, neighbouring α-Al is squeezed into lamellar, make crystal boundary alligatoring, when alloy is stressed, easily crack source in these positions, thus the add-on of Zr will have certain restriction, not The more the better.
(1) in Al-Mg alloy, add quantitative Mn(1.9%), Er(0.2%) tissue obtains obvious refinement, and forms AlMn2, ErMn2 and ErFe2 phase, strength of alloy and resistance toheat raise; Adding separately Mn makes electric conductivity, elongation reduce, and after compound adds Er, electric conductivity and elongation obtain lifting to a certain extent.
(2), after compound adds Zr on quantitative Er, Mn basis of interpolation, organize by continuation refinement, and form Al3Zr particle distribution in grain boundaries; When adding 0.12%Zr, alloy over-all properties is relatively good, and tensile strength reaches 141MPa, and elongation is 36%, and electric conductivity is 49.5IACS%, and heat resisting temperature is 121 DEG C; When adding 0.18%Zr, forming thick Al3Zr particle and in short handle or block distribution together with being interweaved with Compound Phase, neighbouring α-Al matrix being squeezed into lamellar, causing mechanical properties decrease.

Claims (2)

1., containing an Al-Mg alloy material for rare earth erbium, zirconium and manganese element, it is characterized in that: its constituent mass mark is: commercial-purity aluminium, Al-5%Zr, Al-10%Mn and Al-10%Er master alloy of 99.7%.
2. as claimed in claim 1 a kind of Al-Mg alloy material containing rare earth erbium, zirconium and manganese element prepare treatment process, it is characterized in that: starting material are that after boronation, massfraction is commercial-purity aluminium, Al-5%Zr, Al-10%Mn and Al-10%Er master alloy of 99.7%, during melting, in well formula resistance furnace, melting is carried out with corundum crucible, smelting temperature controls at 800 DEG C, master alloy is pressed into molten metal by about 750 DEG C, stir three minutes, add hexachloroethane and carry out refining, be poured into after skimming in the punching block being preheated to about 280 DEG C.
CN201410512569.6A 2014-09-29 2014-09-29 Al-Mg alloy material containing rare earth erbium, zirconium and manganese and preparation treatment method thereof Pending CN105441702A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111074106A (en) * 2019-12-20 2020-04-28 山东南山铝业股份有限公司 High-efficiency low-consumption rolling rare earth aluminum alloy and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111074106A (en) * 2019-12-20 2020-04-28 山东南山铝业股份有限公司 High-efficiency low-consumption rolling rare earth aluminum alloy and preparation method thereof

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