CN113528913A - High-thermal-conductivity wrought magnesium alloy material and preparation method thereof - Google Patents
High-thermal-conductivity wrought magnesium alloy material and preparation method thereof Download PDFInfo
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- CN113528913A CN113528913A CN202110871092.0A CN202110871092A CN113528913A CN 113528913 A CN113528913 A CN 113528913A CN 202110871092 A CN202110871092 A CN 202110871092A CN 113528913 A CN113528913 A CN 113528913A
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- alloy material
- magnesium alloy
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- wrought magnesium
- high thermal
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- 239000000956 alloy Substances 0.000 title claims abstract description 45
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 13
- 239000011777 magnesium Substances 0.000 claims abstract description 13
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 10
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 10
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 26
- 238000001125 extrusion Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 18
- 238000003723 Smelting Methods 0.000 claims description 17
- 238000005266 casting Methods 0.000 claims description 17
- 229910045601 alloy Inorganic materials 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 7
- 230000032683 aging Effects 0.000 claims description 5
- 238000000137 annealing Methods 0.000 claims description 5
- 235000012438 extruded product Nutrition 0.000 claims description 5
- 238000000265 homogenisation Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004615 ingredient Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 239000000463 material Substances 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 4
- 238000001953 recrystallisation Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/04—Alloys based on magnesium with zinc or cadmium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
Abstract
The invention relates to a high-heat-conductivity wrought magnesium alloy material and a preparation method thereof, wherein the magnesium alloy material comprises the following components in percentage by mass: zn element: 4.0% -7.0%, Zr element: 0.5% -2.0%, Ce/La: 0.3% -1.5%, Y: 1.0 to 3.0 percent of magnesium and the balance of magnesium. The heat conductivity coefficient of the high-heat-conductivity magnesium alloy material can reach 130W/m.k.
Description
Technical Field
The invention relates to the field of alloy materials, in particular to a high-heat-conductivity wrought magnesium alloy material and a preparation method thereof.
Background
With the continuous development of the fields of aviation, aerospace, new generation weaponry, high-speed trains, new energy automobiles and the like, the number and the arrangement density of high-power density electromagnetic devices are continuously increased, heat generated in the operation process needs to be immediately led out, otherwise, the stability and the reliability of equipment operation are seriously affected by overhigh temperature, the service life of various equipment is greatly shortened, and therefore, the important problem to be solved is how to quickly and effectively lead out the heat generation of the devices under the background of light weight.
The complete set of technology for producing the high-thermal-conductivity magnesium alloy material and the product thereof is an advanced basic material and a key technology for supporting the development of radiating components such as airplanes, high-speed trains, automobiles, computers and the like, plays an important role in realizing the lightweight of the equipment, improving the running stability of a system and prolonging the service life of the system, and can replace the similar common high-thermal-conductivity alloy material by more than 30 percent in the year 2035. Traditional high-heat-conductivity metals such as Ag and Cu are difficult to meet the practical application requirements due to the fact that the density is too high (about 10.5g/cm3 and 8.9g/cm3 respectively) and the price is high. The magnesium alloy material has the advantage of low density, and is one of potential material systems meeting application requirements, but the heat conductivity coefficient of the common magnesium alloy has a significant difference compared with that of the aluminum alloy, so that the development of a high-strength high-heat-conductivity magnesium alloy material with the heat conductivity coefficient of more than 125W/(m.K) and a preparation and processing technology of a product thereof is a main direction for the development of the field.
Disclosure of Invention
The invention provides a high-thermal-conductivity wrought magnesium alloy material and a preparation method thereof, aiming at solving the technical problems in the background art, wherein the high-thermal-conductivity wrought magnesium alloy material has a high thermal conductivity coefficient which can reach more than 130W/m.k.
The technical solution of the invention is as follows: the invention relates to a high-heat-conductivity wrought magnesium alloy material, which is characterized in that: the magnesium alloy material comprises the following components in percentage by mass: zn element: 4.0% -7.0%, Zr element: 0.5% -2.0%, Ce/La: 0.3% -1.5%, Y: 1.0 to 3.0 percent of magnesium and the balance of magnesium.
Further, the element Y is Mg-Y master alloy.
Further, Zr element is Mg-Zr intermediate alloy.
Further, the Ce/La element is Mg-Ce/La composite intermediate alloy.
Further, Mg and Zn are pure elements.
The method for preparing the wrought magnesium alloy material with high thermal conductivity is characterized by comprising the following steps of: the preparation method comprises the following steps:
1) alloy ingredients, namely, mixing the ingredients according to a mixing ratio and then smelting the mixture into an ingot, wherein smelting equipment is a medium-frequency smelting furnace, and the alloy ingot contains Zn elements: 4.0% -7.0%, Zr element: 0.5% -2.0%, Ce/La: 0.3% -1.5%, Y: 1.0 to 3.0 percent. The balance of magnesium element;
2) ingot casting and annealing: homogenizing the cast ingot: homogenization temperature: 360 ℃ -450 ℃, time: 8-12 h; water quenching;
3) and (4) extruding.
Further, the smelting process in the step 1) is as follows: introducing protective gas into the furnace: SF6+CO2The SF6 volume ratio is: 0.05-1% and the balance of CO2Preheating for 10-25 minutes at a heating power of 10-20kw, heating for 15-35kw until the solution is completely melted, then heating for 30-35kw and preserving heat for 20-40 minutes, cooling for 15-30 minutes at the heating power of 10-20kw until the casting temperature is reached, wherein the casting temperature is as follows: 660-720 ℃, and then casting.
Further, the step 3) of extrusion comprises the following specific steps:
heating time of the cast ingot: d/1.0 mm/min (D is ingot diameter in mm);
heating temperature of cast ingot: 360℃ and 420 DEG C
Temperature of the extrusion die: 340 ℃ and 380 ℃;
extrusion ratio: 10-30 parts of;
extrusion speed: 50-100 mm/min.
Further, after the step 3), the method also comprises a step 4) of aging treatment:
solution treatment temperature of the extruded product: 220-260 ℃, heat preservation time: 3-5 hours.
The invention has the beneficial effects that:
1) 4% -7% of Zn element is added into the alloy to enhance the heat conductivity coefficient of the alloy;
2) the Ce, La and Y elements are added into the alloy so as to improve the recrystallization temperature of the magnesium alloy and slow down the recrystallization process, and very stable dispersed phase particles can be precipitated, so that the high-temperature strength and creep resistance of the magnesium alloy can be greatly improved;
Detailed Description
The present invention will be described in further detail with reference to specific examples below:
example 1
The high-thermal-conductivity wrought magnesium alloy material comprises the following components in percentage by mass: magnesium element: the balance, Zn element: 4.5%, Zr element: 0.8%, Ce/La: 0.5%, Y: 1.5 percent.
The preparation method comprises the following steps:
1) the materials are mixed according to the mixing proportion and then are smelted into ingots, the smelting equipment is an intermediate frequency smelting furnace, and the smelting process is as follows: introducing protective gas into the furnace: SF6+CO2The SF6 volume ratio is: 0.7% and the balance of CO2After the heating power of 15kw is preheated for 13 minutes, the heating power of 25kw is heated until the solution is completely melted, then the heating power of 30kw is heated for 25 minutes, then the temperature is reduced by 12kw to 15 minutes until the pouring temperature is reached, and the pouring temperature is as follows: at 680 ℃, and then pouring;
2) ingot casting and annealing:
homogenizing the cast ingot: homogenization temperature: 360 ℃, time: 8 h; water quenching;
3) extruding:
heating time and temperature of ingot casting: heating the ingot with the diameter of 300mm at 360 ℃, and keeping the temperature for 300min after reaching the temperature;
temperature of the extrusion die: 380 ℃;
the extrusion ratio in the extrusion process is 15;
extrusion speed: 50mm/min
4) Aging treatment:
the extruded product was incubated at 220 ℃ for 4 hours.
Performance data (room temperature stretching) of the obtained high-thermal-conductivity wrought magnesium alloy material:
example 2
The high-thermal-conductivity wrought magnesium alloy material comprises the following components in percentage by mass: magnesium element: the balance, Zn element: 5.5%, Zr element: 1.5%, Ce/La: 1.2%, Y: 2.0 percent.
The preparation method comprises the following steps:
1) the materials are mixed according to the mixing proportion and then are smelted into ingots, the smelting equipment is an intermediate frequency smelting furnace, and the smelting process is as follows: introducing protective gas into the furnace: SF6+CO2The SF6 volume ratio is: 0.2% and the balance of CO2After preheating for 30 minutes at 20kw, heating for 30kw until the solution is completely melted, then keeping the temperature for 35 minutes at 25kw, cooling for 20 minutes at 15kw until the casting temperature is reached, and casting temperature: pouring at 700 ℃;
2) ingot casting and annealing:
homogenizing the cast ingot: homogenization temperature: 390 ℃, time: 9 h; water quenching;
3) extruding:
heating time and temperature of ingot casting: heating the ingot with the diameter of 300mm at 380 ℃, and keeping the temperature for 300min after reaching the temperature;
temperature of the extrusion die: 360 ℃;
the extrusion ratio in the extrusion process is 20;
extrusion speed: 60mm/min
4) Aging treatment:
the extruded product was incubated at 230 ℃ for 6 hours.
Performance data (room temperature stretching) of the obtained high-thermal-conductivity wrought magnesium alloy material:
example 3 Zn element: 4.0% -7.0%, Zr element: 0.5% -2.0%, Ce/La: 0.3% -1.5%, Y: 1.0 to 3.0 percent
The high-thermal-conductivity wrought magnesium alloy material comprises the following components in percentage by mass: magnesium element: the balance, Zn element: 6.5%, Zr element: 1.8%, Ce/La: 1.5%, Y: 2.5 percent.
The preparation method comprises the following steps:
1) the materials are mixed according to the mixing proportion and then are smelted into ingots, the smelting equipment is an intermediate frequency smelting furnace, and the smelting process is as follows: introducing protective gas into the furnace: SF6+CO2The SF6 volume ratio is: 0.7% and the balance of CO2After the heating power of 15kw is preheated for 13 minutes, the heating power of 25kw is heated until the solution is completely melted, then the solution is kept warm for 25 minutes at the heating power of 35kw, and then the temperature is reduced by the heating power of 15kw for 15 minutes until the pouring temperature is reached, and the pouring temperature is: casting at 720 ℃;
2) ingot casting and annealing:
homogenizing the cast ingot: homogenization temperature: 390 ℃, time: 9 h; water quenching;
3) extruding:
heating time and temperature of ingot casting: heating the ingot with the diameter of 300mm at 400 ℃, and keeping the temperature for 300min after reaching the temperature;
temperature of the extrusion die: 350 ℃;
the extrusion ratio in the extrusion process is 30;
extrusion speed: 90mm/min
4) Aging treatment:
the extruded product was incubated at 230 ℃ for 6 hours.
Performance data (room temperature stretching) of the obtained high-thermal-conductivity wrought magnesium alloy material:
the present invention and the technical contents not specifically described in the above embodiments are the same as the prior art.
The present invention is not limited to the above-described embodiments, and the present invention can be implemented with the above-described advantageous effects.
The above embodiments are only specific embodiments disclosed in the present invention, but the scope of the present invention is not limited thereto, and the scope of the present invention disclosed in the present invention should be subject to the scope of the claims.
Claims (9)
1. A high-thermal-conductivity wrought magnesium alloy material is characterized in that: the magnesium alloy material comprises the following components in percentage by mass: zn element: 4.0% -7.0%, Zr element: 0.5% -2.0%, Ce/La: 0.3% -1.5%, Y: 1.0 to 3.0 percent of magnesium and the balance of magnesium.
2. The wrought magnesium alloy material with high thermal conductivity according to claim 1, wherein: the Y element is Mg-Y intermediate alloy.
3. The wrought magnesium alloy material with high thermal conductivity according to claim 1, wherein: the Zr element is Mg-Zr intermediate alloy.
4. The wrought magnesium alloy material with high thermal conductivity according to claim 1, wherein: the Ce/La element is Mg-Ce/La composite intermediate alloy.
5. The wrought magnesium alloy material with high thermal conductivity according to claim 1, wherein: the Mg and Zn elements are pure elements.
6. A method for producing the high thermal conductive wrought magnesium alloy material of claim 1, characterized in that: the preparation method comprises the following steps:
1) alloy ingredients, namely, mixing the ingredients according to a mixing ratio and then smelting the mixture into an ingot, wherein smelting equipment is a medium-frequency smelting furnace, and the alloy ingot contains Zn elements: 4.0% -7.0%, Zr element: 0.5% -2.0%, Ce/La: 0.3% -1.5%, Y: 1.0-3.0 percent of magnesium element;
2) ingot casting and annealing: homogenizing the cast ingot: homogenization temperature: 360 ℃ -450 ℃, time: 8-12 h; water quenching;
3) and (4) extruding.
7. The method for producing a wrought magnesium alloy material with high thermal conductivity according to claim 6, wherein the method is characterized in thatThe method comprises the following steps: the smelting process in the step 1) is as follows: introducing protective gas into the furnace: SF6+CO2The SF6 volume ratio is: 0.05-1% and the balance of CO2Preheating for 10-25 minutes at a heating power of 10-20kw, heating for 15-35kw until the solution is completely melted, then heating for 30-35kw and preserving heat for 20-40 minutes, cooling for 15-30 minutes at the heating power of 10-20kw until the casting temperature is reached, wherein the casting temperature is as follows: 660-720 ℃, and then casting.
8. The method for preparing the wrought magnesium alloy material with high thermal conductivity according to claim 7, wherein the method comprises the following steps: the step 3) of extrusion comprises the following specific steps:
heating time of the cast ingot: d/1.0 mm/min (D is ingot diameter in mm);
heating temperature of cast ingot: 360 ℃ and 420 ℃;
temperature of the extrusion die: 340 ℃ and 380 ℃;
extrusion ratio: 10-30 parts of;
extrusion speed: 50-100 mm/min.
9. The method for preparing the wrought magnesium alloy material with high thermal conductivity according to claim 8, wherein the method comprises the following steps: the step 3) is followed by a step 4) of aging treatment:
solution treatment temperature of the extruded product: 220-260 ℃, heat preservation time: 3-5 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110871092.0A CN113528913A (en) | 2021-08-02 | 2021-08-02 | High-thermal-conductivity wrought magnesium alloy material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110871092.0A CN113528913A (en) | 2021-08-02 | 2021-08-02 | High-thermal-conductivity wrought magnesium alloy material and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101200784A (en) * | 2007-12-17 | 2008-06-18 | 中国科学院长春应用化学研究所 | Magnesium-zinc-lanthanon-zirconium magnesium alloy and method for preparing same |
| CN103952613A (en) * | 2014-05-19 | 2014-07-30 | 重庆大学 | Wrought magnesium alloy containing rare earth cerium and yttrium and having high yield ratio |
| CN104278184A (en) * | 2014-09-24 | 2015-01-14 | 华中科技大学 | High-strength heat-proof rare earth magnesium alloy and preparation method thereof |
| CN105543603A (en) * | 2016-02-05 | 2016-05-04 | 重庆大学 | Low-rare-earth high-strength deforming magnesium alloy and preparation method thereof |
| CN112609114A (en) * | 2020-11-27 | 2021-04-06 | 鼎泰(江苏)轻合金有限公司 | Magnesium alloy and preparation method and application thereof |
-
2021
- 2021-08-02 CN CN202110871092.0A patent/CN113528913A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101200784A (en) * | 2007-12-17 | 2008-06-18 | 中国科学院长春应用化学研究所 | Magnesium-zinc-lanthanon-zirconium magnesium alloy and method for preparing same |
| CN103952613A (en) * | 2014-05-19 | 2014-07-30 | 重庆大学 | Wrought magnesium alloy containing rare earth cerium and yttrium and having high yield ratio |
| CN104278184A (en) * | 2014-09-24 | 2015-01-14 | 华中科技大学 | High-strength heat-proof rare earth magnesium alloy and preparation method thereof |
| CN105543603A (en) * | 2016-02-05 | 2016-05-04 | 重庆大学 | Low-rare-earth high-strength deforming magnesium alloy and preparation method thereof |
| CN112609114A (en) * | 2020-11-27 | 2021-04-06 | 鼎泰(江苏)轻合金有限公司 | Magnesium alloy and preparation method and application thereof |
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