CN105525163A - Technological method for improving Al-Mg alloy performance by adding Y and Sc element - Google Patents
Technological method for improving Al-Mg alloy performance by adding Y and Sc element Download PDFInfo
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- CN105525163A CN105525163A CN201410512016.0A CN201410512016A CN105525163A CN 105525163 A CN105525163 A CN 105525163A CN 201410512016 A CN201410512016 A CN 201410512016A CN 105525163 A CN105525163 A CN 105525163A
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Abstract
The invention provides a technological method for improving an Al-Mg alloy performance by adding Y and Sc elements. 0.2% of Y and 0.12% of Sc are added in an Al-Mg alloy for smelting and stirring; hexachloroethane (C2C16) is used for refining; and such processes as molding by casting are performed after slagging off; after quantitative rare earth Y (0.2%) is added in the Al-Mg alloy, the tensile strength and the heat resistance are improved; after Sc is added in the alloy, the structure is continuously refined, and Al3Sc particles are formed and distributed in a grain boundary; and when 0.12% of Sc is added, the comprehensive performance of the alloy is relatively excellent, the tensile strength reaches 141 MPa, the elongation is 36%, the electrical conductivity is 51.12 IACS%, and the heat resisting temperature is 118 DEG C.
Description
Technical field
The invention belongs to field of material technology, particularly relate to a kind of processing method of adding Y and Sc element raising Al-Mg alloy property.
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, 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 is restricted.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.Add trace rare-earth and Sc, Y element is the effective way improving rich magnesium Al-Mg alloy over-all properties.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of and add the processing method that Y and Sc element improves Al-Mg alloy property, mechanical property, conductivity and resistance toheat are better comprehensive, to overcome the deficiency of prior art problem.
The technical solution used in the present invention is: a kind of processing method of adding Y and Sc element raising Al-Mg alloy property, comprises the following steps:
(1) prepare burden: after boronation, massfraction is the commercial-purity aluminium of 99.7%, composition is: 99.685%Al, 0.020%B, 0.067%Si, 0.111%Fe, 0.005%Mg, 0.001%Cr, 0.007%Ni, 0.033%Ti, all the other 0.071, required interpolation 1.9%Mg, 0.2%Y and 0.12%Sc, Mg, Y and Sc are alloy;
(2) melting and casting: carry out melting with corundum crucible in well formula resistance furnace, smelting temperature controls at 780 DEG C, and about 700 DEG C, by the alloy press-in molten metal containing Mg, Y and Sc, are stirred three minutes, refining, is poured in the punching block being preheated to about 260 DEG C shaping after skimming.
In described step (2) adopt Al-5%Sc, Al-10%Mg and Al-10%Y master alloy to add.
Hexachloroethane (C is adopted in described step (2)
2cl
6) refining.
Beneficial effect of the present invention: compared with prior art, effect is as follows:
Add quantitative Rare Earth Y (0.2%) in Al-Mg alloy after, tensile strength and resistance toheat raise.After adding Sc in alloy, tissue continues refinement, and forms Al
3sc particle distribution is in grain boundaries; When adding 0.12%Sc, alloy over-all properties is relatively good, and tensile strength reaches 141MPa, and elongation is 36%, and electric conductivity is 51.12IACS%, and heat resisting temperature is 118 DEG C; When adding 0.18%Sc, form thick Al
3neighbouring α-Al matrix also in short handle or block distribution together with being interweaved with other rare earth compounds, being squeezed into lamellar, causing mechanical properties decrease by Sc particle.
Accompanying drawing explanation
Fig. 1 is Al-Mg alloy mechanical property figure of the present invention;
Fig. 2 is Al-Mg alloy electric property figure of the present invention.
Embodiment
Add the processing method that Y and Sc element improves Al-Mg alloy property, comprise the following steps:
(1) prepare burden: after boronation, massfraction is the commercial-purity aluminium of 99.7%, composition is: 99.685%Al, 0.020%B, 0.067%Si, 0.111%Fe, 0.005%Mg, 0.001%Cr, 0.007%Ni, 0.033%Ti, all the other 0.071, required interpolation 1.9%Mg, 0.2%Y and 0.12%Sc, Mg, Y and Sc are alloy;
(2) melting and casting: carry out melting with corundum crucible in well formula resistance furnace, smelting temperature controls at 780 DEG C, and about 700 DEG C, by the alloy press-in molten metal containing Mg, Y and Sc, are stirred three minutes, refining, is poured in the punching block being preheated to about 260 DEG C shaping after skimming.
In described step (2) adopt Al-5%Sc, Al-10%Mg and Al-10%Y master alloy to add.
Hexachloroethane (C is adopted in described step (2)
2cl
6) refining.
Following several batching is adopted to carry out casting alloy, as shown in table 1.
Adopt above-mentioned a kind of processing method of adding Y and Sc element raising Al-Mg alloy property, the impact of different Rare Earth Y, Sc element addition Al-Mg alloy mechanics and electric property can be drawn, as shown in Fig. 1 ~ Fig. 2.As seen from the figure, after adding quantitative Y, properties gets a promotion; Along with the increase of rare earth Sc content, wax-anti dispersant is all first increase to fall trend afterwards, and electric conductivity reduces; No. 2 samples have better conductivity, and electric conductivity is 51.57IACS%; No. 4 samples have better comprehensive mechanical property, and tensile strength reaches 141MPa, and electric conductivity is 51.12IACS%, and elongation is 36.5%.Visible, Rare Earth Y, the Sc of suitable addition under the prerequisite reducing electric conductivity by a small margin, can improve the mechanical property of Al-Mg alloy.
Adopt above-mentioned a kind of processing method of adding Y and Sc element raising Al-Mg alloy property, can draw and add Y and Sc element to the impact of Al-Mg alloy resistance toheat, 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, its use temperature is higher, and current capacity is also larger.As shown in table 2 is the heat resisting temperature of different-alloy sample, and wherein No. 4 sample (Al-1.9Mg-0.2Y-0.12Sc alloy) heat resisting temperatures are the highest, reach 118 DEG C.
Claims (3)
1. add the processing method that Y and Sc element improves Al-Mg alloy property, it is characterized in that: comprise the following steps:
(1) prepare burden: after boronation, massfraction is the commercial-purity aluminium of 99.7%, composition is: 99.685%Al, 0.020%B, 0.067%Si, 0.111%Fe, 0.005%Mg, 0.001%Cr, 0.007%Ni, 0.033%Ti, all the other 0.071, required interpolation 1.9%Mg, 0.2%Y and 0.12%Sc, Mg, Y and Sc are alloy;
(2) melting and casting: carry out melting with corundum crucible in well formula resistance furnace, smelting temperature controls at 780 DEG C, and about 700 DEG C, by the alloy press-in molten metal containing Mg, Y and Sc, are stirred three minutes, refining, is poured in the punching block being preheated to about 260 DEG C shaping after skimming.
2. according to claim 1ly a kind ofly add the processing method that Y and Sc element improves Al-Mg alloy property, it is characterized in that: in described step (2) adopt Al-5%Sc, Al-10%Mg and Al-10%Y master alloy to add.
3. a kind of processing method of adding Y and Sc element raising Al-Mg alloy property according to claim 1, is characterized in that: adopt hexachloroethane (C in described step (2)
2cl
6) refining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512016.0A CN105525163A (en) | 2014-09-29 | 2014-09-29 | Technological method for improving Al-Mg alloy performance by adding Y and Sc element |
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| CN201410512016.0A CN105525163A (en) | 2014-09-29 | 2014-09-29 | Technological method for improving Al-Mg alloy performance by adding Y and Sc element |
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| CN105525163A true CN105525163A (en) | 2016-04-27 |
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| CN201410512016.0A Pending CN105525163A (en) | 2014-09-29 | 2014-09-29 | Technological method for improving Al-Mg alloy performance by adding Y and Sc element |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111378878A (en) * | 2018-12-29 | 2020-07-07 | 嘉丰工业科技（惠州）有限公司 | High-ductility non-heat-treatment die-casting aluminum alloy and preparation method thereof |
-
2014
- 2014-09-29 CN CN201410512016.0A patent/CN105525163A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111378878A (en) * | 2018-12-29 | 2020-07-07 | 嘉丰工业科技（惠州）有限公司 | High-ductility non-heat-treatment die-casting aluminum alloy and preparation method thereof |
| CN111378878B (en) * | 2018-12-29 | 2021-10-26 | 嘉丰工业科技（惠州）有限公司 | High-ductility non-heat-treatment die-casting aluminum alloy and preparation method thereof |
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Application publication date: 20160427 |
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