CN104152769B - A kind of heat conductive magnesium alloy and preparation method thereof - Google Patents
A kind of heat conductive magnesium alloy and preparation method thereof Download PDFInfo
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Abstract
The invention provides a kind of heat conductive magnesium alloy and preparation method thereof, the component content of this magnesium alloy is: Zn:0.8-3.0wt.%, and Mn:0.25-0.48wt.%, Ce:0.05-1.0wt.%, inevitable impurity≤0.15wt.%, all the other are Mg. Its preparation method comprises: taking pure magnesium ingot, pure zinc ingot, magnesium manganese intermediate alloy, magnesium cerium intermediate alloy as raw material, to after magnesium ingot, zinc ingot metal, magnesium manganese intermediate alloy and the fusing of magnesium cerium intermediate alloy, alloying, make billet, carry out homogenising heat treatment, adopt the deformation techniques such as extruding, rolling to be processed into bar, tubing, wire rod, sheet material etc. Under magnesium alloy materials room temperature of the present invention, thermal conductivity is greater than 130W/mK, and wherein, tensile strength is greater than 250MPa, and yield strength is greater than 200MPa, and percentage elongation is greater than 20%. Can be as cooling system structure materials such as power supply, electronic device and LED heat sink section bars in Aero-Space.
Description
Technical field
The present invention relates to a kind of heat conductive magnesium alloy and preparation method thereof, belong to metal material technical field.
Background technology
Along with modern industry development with rapid changepl. never-ending changes and improvements, thermal component is carried out to heat management and start to become the technical barrier that faces at present solution. Along with the continuous increase of electronic devices and components and equipment semiconductor-on-insulator transistor density, its volumetric power density is therefore more and more high, and caloric value also constantly increases, and the heat-sinking capability of electric elements and equipment is had higher requirement. The heat-sinking capability of radiator depends primarily on its alloy material and radiator structure design, determine at electric elements and the device space, be in the definite situation of heat spreader structures, the thermal conductivity factor of radiator alloy used plays a key effect the heat-sinking capability to radiator, develop the alloy of high heat conduction for the radiator manufacture of electronic devices and components and electric equipment, tool is of great significance.
Magnesium alloy has obtained great concern as the lightest current structural metallic materials, and is progressively widely used with military industry field civilian. Mechanical property at some to material and heat conductivility have the field of special requirement simultaneously, magnesium alloy possesses good specific strength, specific stiffness and good heat-conductive characteristic because of it, thereby there are special advantages for development, as light source heat radiation module, the automobile engine shell etc. of the shell of 3C Product, LED light fixture.
In existing magnesium alloy materials, the alloy that thermal conductivity is high, as ZE41, QE22, its intensity is all less than 265MPa. And the higher alloy of intensity, such as AZ81, WE43, its thermal conductivity is all less than 55W/mK. The thermal conductivity of common magnesium alloy materials is: AS21:68W/mK, AM20:97W/mK, Mg-Zn-Y:53W/mK, Mg-Zn-Gd:34W/mK, ZM51:125W/mK, Mg-11Y-5Gd-2Zn-0.5Zr:23W/mK. Therefore be necessary to develop the special heat conductive magnesium alloy material that heat conductivility and mechanical property are taken into account.
Summary of the invention
For above-mentioned deficiency, the object of the present invention is to provide the deformed magnesium alloy material of the more excellent and high heat conductance of a kind of mechanical property, and the composition proportion method and the preparation method that determine optimum heat conductive magnesium alloy are provided.
For achieving the above object, the present invention takes following technical scheme:
A kind of heat conductive magnesium alloy, the component content of this magnesium alloy is: Zn:0.8-3.0wt.%, Mn:0.25-0.48wt.%, Ce:0.05-1.0wt.%, inevitable impurity≤0.15wt.%, all the other are Mg.
As the further optimization of such scheme, the component content of this magnesium alloy is: Zn:0.9-2.7wt.%, and Mn:0.3-0.48wt.%, Ce:0.10-0.80wt.%, inevitable impurity≤0.15wt.%, all the other are Mg.
As the further optimization of such scheme, the component content of this magnesium alloy is: Zn:2.02wt.%, and Mn:0.41wt.%, Ce:0.41wt.%, inevitable impurity≤0.15wt.%, all the other are Mg.
A composition proportion method of determining above-mentioned heat conductive magnesium alloy, is characterized in that, comprises the following steps:
(1) according to the purity of pure magnesium material used, the selected content range of preparing required interpolation Mn in heat conductive magnesium alloy: 0.25-0.48wt.%, the high purity magnesium for Fe content in 30ppm, Mn is containing measuring 0.3 ± 0.05wt.%; The pure magnesium of one-level for Fe content range between 80ppm ~ 120ppm, Mn is containing measuring 0.48 ± 0.05wt.%;
(2) determine that in heat conductive magnesium alloy, Ce content range is 0.05-1.0wt.%, the content that changes Zn is prepared the alloy of different numberings, obtains the best alloy of thermal conductivity, and the Zn content that defines this alloy is optimum Zn content;
(3) the optimum Zn content of optional step (2) gained, changes the alloys that Ce content in alloy is prepared different numberings, obtains the best alloy of thermal conductivity, and defining the mass ratio of Zn content and Ce content in this alloy is Zn/Ce best in quality proportioning;
(4) thermal conductivity of all alloys of preparing in (2) and (3) step is compared, add up Zn content and the Ce content of the alloy of thermal conductivity more than 130W/mK, obtain the optimization content range of Zn and Ce;
(5) according to step (3) and the Zn/Ce best in quality proportioning of (4) acquisition and the optimization content range of Zn and Ce, preparation Zn and Ce content change in the optimization content range of described Zn, Ce, and Zn/Ce mass ratio is some alloys of described Zn/Ce best in quality proportioning, therefrom choose the composition proportion of the alloy that thermal conductivity is the highest, be the composition proportion of above-mentioned preferred heat conductive magnesium alloy.
As the further optimization of such scheme, described Zn and Ce best in quality proportioning Zn:Ce are preferably 5:1; Described pure magnesium material is purity higher than 99.95% the pure magnesium of one-level.
A preparation method for heat conductive magnesium alloy, is characterized in that, comprises the following steps:
(1) taking purity higher than 99.95% the pure magnesium of one-level, purity higher than 99.98% pure zinc ingot, magnesium manganese intermediate alloy that Mn content is less than 4wt.%, magnesium cerium intermediate alloy that Ce content is less than 35wt.% as raw material, for subsequent use after mechanical grinding scale removal; Calculate batching according to the percentage by weight of above-mentioned magnesium alloy composition;
(2) whole magnesium ingots and pure zinc ingot are placed in the mild steel melting kettle of melting furnace, under CO2+0.5%SF6 gas shield, it is melted completely, in the time that magnesium melt temperature rises to 750 ± 20 DEG C, the magnesium cerium intermediate alloy that is preheating to 300-400 DEG C is added lentamente, stir, after slag hitting, heat up;
(3) in the time that magnesium melt temperature is warmed up to 800-820 DEG C, the magnesium manganese intermediate alloy that is preheating to 300-400 DEG C is added in magnesium melt lentamente, stir the abundant dissolving that makes it for 3-5 minute, then make melt cooling;
(4) in the time that magnesium melt is cooled to 740 ± 10 DEG C, stir slag hitting, be sprinkled into No. 5 solvents as refining agent fully stirring; Melt temperature is controlled to 750 ± 10 DEG C, leaves standstill 45-60 minute, complete refining process; Subsequently melt is down to 720-690 DEG C of scope and pours into a mould, adopt metal casting mould, mould temperature 300-400 DEG C;
(5) strand prepared above-mentioned steps need be carried out to homogenizing annealing processing, its method is that billet is heated up with stove, is slowly heated to 380-430 DEG C of scope, insulation 12-24 hour, the air cooling of coming out of the stove;
(6) according to the shape of high heat conductive magnesium alloy goods, adopt extruding, rolling and forging method, alloy is processed into the various goods of bar, section bar, sheet material, its suitable heat distortion temperature scope is 320 DEG C-430 DEG C.
Compared to existing technology, the present invention has following beneficial effect:
1, magnesium alloy formula of the present invention is based on following consideration: the magnesium manganese alloy of low zinc is to have medium intensity and good plasticity, can crystal grain thinning by adding Ce, promote mechanical property. For wrought magnesium alloy, because the solid solubility of manganese in alloy substrate is very little under room temperature, in alloy, the addition of manganese is little on the impact of its thermal conductivity. Mn exists with manganese particle form, and the Main Function of Mn in magnesium be the impurity element such as iron, silicon of removing in magnesium, carries heavy alloyed decay resistance, produces certain second-phase strengthening. The effect of removing in advance iron sila matter by it, and reduce the impurity element combinations such as Ce and iron and the chance of consumption. For this reason, the present invention, according to the purity of pure magnesium material used, selectes the content range of preparing required interpolation Mn in heat conductive magnesium alloy: 0.25-0.48wt.%, the high purity magnesium for Fe content in 30ppm, and Mn is containing measuring 0.3 ± 0.05wt.%; The pure magnesium of one-level for Fe content range between 80ppm ~ 120ppm, Mn is containing measuring 0.48 ± 0.05wt.%. And Zn and Ce are comparatively complicated on the impact of wrought magnesium alloy thermal conductivity, because part Zn, Ce understand solid solution in magnesium matrix and form some second-phases in the time that Zn, Ce add to respectively in magnesium alloy, mainly comprise Mg-Ce phase, Mg-Zn phase, replaced mutually Mg-Zn phase but can form more stable Mg-Zn-Ce in the time that Zn and Ce add in magnesium alloy simultaneously. Therefore in the time adding a certain amount of Zn, along with the increase of Ce content, thermal conductance takes the lead in increasing rear decline, mainly because the interpolation of a certain amount of Ce can form Mg-Zn-Ce phase and Mg-Ce phase, it is conducive to Zn and separates out from magnesium matrix, thereby reduce the Zn content in matrix, but increase the content of intermetallic compound, with respect to solid solution atom, intermetallic compound, therefore adds a certain amount of Ce and is conducive to put forward heavy alloyed thermal conductivity and mechanical property much smaller than solid solution atom the impact of thermal conductivity; But when Ce content exceed a certain amount of after, excessive Ce will solid solution in matrix, the heteroatom in matrix is increased, therefore the thermal conductivity of alloy will decline. And the mechanical property of alloy also can decline to some extent, because increasing mutually, Mg-Zn-Ce there is agglomeration, in crystal grain thinning, also destroy the integrality of matrix, so performance can decline to some extent. Therefore between Zn and Ce, exist certain proportion relation to make mechanical property and thermal conductivity reach best. Similar on the impact of magnesium alloy with Ce, a small amount of Zn interpolation can promote separating out of the Ce atom of part solid solution in matrix, improves alloy thermal conductivity, but the interpolation of excessive Zn also can cause solid solution in matrix, and the thermal conductivity of alloy is declined.
2, the room temperature thermal conductivity of conventional magnesium alloy is all lower than 100W/mK at present, and the application on radiator, Aero-Space and 3C Product is restricted. The magnesium alloy materials room temperature thermal conductivity that the present invention develops is greater than 130W/mK, tensile strength is greater than 250MPa, yield strength is greater than 200MPa, percentage elongation is greater than 20%, meet intensity and the plasticity requirement of most of structural members, the structural material that can have heat radiation to require as power supply, electronic device and LED heat sink section bar etc. in Aero-Space.
3, the high heat conductive magnesium alloy that the present invention develops has good hot-workability, is applicable to the production efficiency of Rapid Thermal extrusion molding raising magnesium alloy, can reduce hot-working preparation cost.
Brief description of the drawings:
Fig. 1 is the as cast condition metallograph of magnesium alloy materials in example 1 of the present invention.
Fig. 2 is the as cast condition metallograph of magnesium alloy materials in example 3 of the present invention.
Fig. 3 is the x-ray diffraction pattern of magnesium alloy materials As-extruded in example 1 of the present invention and example 3.
Fig. 4 is the As-extruded metallographic structure of magnesium alloy materials in example 1 of the present invention.
Fig. 5 is the As-extruded metallographic structure of magnesium alloy materials in example 3 of the present invention.
Fig. 6 is the As-extruded SEM photo of magnesium alloy materials in example 3 of the present invention.
Detailed description of the invention:
Below in conjunction with detailed description of the invention, technical scheme of the present invention is further described in detail.
A kind of heat conductive magnesium alloy, the component content of this magnesium alloy is: Zn:0.8-3.0wt.%, Mn:0.25-0.48wt.%, Ce:0.05-1.0wt.%, inevitable impurity≤0.15wt.%, all the other are Mg.
(1) the optimal components proportioning of the present invention's each component in acquisition Mg-Zn-Mn-Ce magnesium alloy. Because Mn is little on the thermal conductivity impact of magnesium alloy, and the Main Function of Mn in magnesium alloy be the impurity element such as iron, silicon of removing in magnesium, thereby be reduced to the Ce consuming except de-iron sila matter, so the Mn content of choosing is 0.25-0.48wt.%.
(2) first regulate and control the impact of Zn content alloy thermal conductivity. Determine that in heat conductive magnesium alloy, Ce content range is 0.05-1.0wt.%, the content that changes Zn is prepared the alloy of different numberings, obtains the best alloy of thermal conductivity, and the Zn content that defines this alloy is optimum Zn content. While finding that according to literature research adding Ce content in ZM alloy is 0.5wt%, mechanical property reaches optimum, therefore first set in magnesium alloy when the content of Ce is preferably 0.5wt.%, then change Zn content in magnesium alloy, select the best proportioning of component in the best magnesium alloy of thermal conductivity. Result is as shown in table 1:
The preparation method of following instance is: adopt heat conductive magnesium alloy preparation method of the present invention to obtain alloy casting blank, homogenization process is 420 DEG C of * 12h, and extrusion process is 400 DEG C, extrusion ratio 25:1, φ 16mm bar.
Table 1:
As can be known from the above table, along with the increase of Zn content, the thermal conductance of alloy takes the lead in increasing rear decline, main cause is in the certain situation of the Ce content of interpolation, add Zn element and form Mg-Zn-Ce phase and Mg-Ce phase, it promotes solid solution Ce in matrix to separate out, and has reduced the solid solution atom in matrix, thereby increases the thermal conductivity of alloy; When Zn content continues to increase, the thermal conductivity of alloy declines, and is mainly because along with the increase of Zn content, excessive Zn atom will solid solution in matrix, thereby cause the solid solution atom in matrix to increase, alloy thermal conductivity is declined. Therefore the comprehensive mechanical property that considers alloy preferably and the highest alloying component of thermal conductivity be Zn:2.02wt.%, Mn:0.41wt.%, Ce:0.41wt.%, inevitable impurity is 0.15wt.%, all the other are magnesium, therefore optimum Zn content is 2wt.%.
(3) the optimum Zn content of optional step (2) gained is 2wt.%, changes the alloys that Ce content in alloy is prepared different numberings, obtains the best alloy of thermal conductivity, and defining the mass ratio of Zn content and Ce content in this alloy is Zn/Ce best in quality proportioning. Result is as shown in table 2: the preparation method of table 2 is identical with table 1.
Table 2:
Result shows: the best preferred alloy of comprehensive mechanical property and thermal conductivity is Zn:2.02wt.%, Mn:0.41wt.%, and Ce:0.41wt.%, inevitable impurity is 0.15wt.%, all the other are Mg. Zn/Ce best in quality proportioning is 5:1; When concrete enforcement, Zn:Ce is at (4.5-5.5): in 1 scope, all belong to Zn/Ce best in quality proportioning. Heat conductive magnesium alloy is along with the increase thermal conductivity of Ce content increases gradually, and in the time that Ce content is 0.41wt.%, thermal conductivity reaches maximum, then reduces along with Ce increases thermal conductivity. Mainly because when adding Ce element in the certain situation of alloy Zn content, impel the Zn of solid solution in matrix to separate out and form Mg-Zn-Ce phase, thereby reduce the Zn in matrix, thermal conductivity is increased, but after Ce element adds to a certain degree, excessive Ce will solid solution in matrix, cause the Ce in matrix to increase, and second-phase also can make alloy thermal conductivity decline.
(4) thermal conductivity of all alloys of preparing in (2) and (3) step is compared, Zn content and the Ce content of the alloy of statistics thermal conductivity more than 130W/mK, obtain Zn, Ce and optimize content range: Zn:0.8-3.0wt.%, Ce:0.05-1.0wt.%.
Be 5:1 according to the Zn/Ce best in quality proportioning of step (2) and step (3) institute optimization, in Zn/Ce optimizes content range, Zn and Ce content change in described Zn, Ce optimize content range, and Zn/Ce mass ratio is some alloys of described Zn/Ce best in quality proportioning, therefrom choose the composition proportion of the heat conductive magnesium alloy that composition proportion is best as thermal conductivity, mechanical property is optimum of the alloy that thermal conductivity is the highest.
Specific embodiment and test effect are as shown in table 3: Biao Zhong composition unit is wt.%. The preparation method of table 3 is identical with table 1.
Table 3:
From Fig. 1,2, can find out, two alloys have similar pattern. As-cast Microstructure is mainly by α-Mg matrix, segregation is dispersion compound particle composition on crystal boundary, between the inner high order dendritic arm of interdendritic compound and dendrite, and along with the increase dendritic arm spacing of Zn and Ce content reduces, this may be mainly because Ce is enriched in the forward position of solid liquid interface, crystal boundary is had to pinning effect, suppress growing up of crystal grain. As seen from Figure 3: the composition of alloy is mainly α-Mg, α-Mn, Mg mutually17Ce2With Mg-Zn-Ce phase. From Fig. 4,5, can find out, along with the increase of Ce content and Zn content, As-extruded is organized refinement gradually, and the second-phase of separating out increases. Same Fig. 1,2 compares, and As-extruded is organized obvious refinement, and continuous intermetallic compound is broken into some point-like or bar-shaped second-phase dispersion is distributed in matrix. As can be seen from Figure 6, form a large amount of second-phase dispersions and be distributed in matrix, and formed the Mg-Zn-Ce phase of different-shape, reduced the heteroatom content in matrix, thereby improved the thermal conductivity of alloy.
Two, the preparation method of heat conductive magnesium alloy.
A preparation method for heat conductive magnesium alloy, concrete steps comprise:
(1) taking purity higher than 99.95% the pure magnesium of one-level, purity higher than 99.98% pure zinc ingot, magnesium manganese intermediate alloy that Mn content is less than 4wt.%, magnesium cerium intermediate alloy that Ce content is less than 35wt.% as raw material, for subsequent use after mechanical grinding scale removal; Calculate batching according to the percentage by weight of magnesium alloy composition claimed in claim 1;
(2) whole magnesium ingots and pure zinc ingot are placed in the mild steel melting kettle of melting furnace, at CO2+0.5%SF6Under gas shield, it is melted completely, in the time that magnesium melt temperature rises to 750 ± 20 DEG C, the magnesium cerium intermediate alloy that is preheating to 300-400 DEG C is added lentamente, stir, after slag hitting, heat up;
(3) in the time that magnesium melt temperature is warmed up to 800-820 DEG C, the magnesium manganese intermediate alloy that is preheating to 300-400 DEG C is added in magnesium melt lentamente, stir the abundant dissolving that makes it for 3-5 minute, then make melt cooling;
(4) in the time that magnesium melt is cooled to 740 ± 10 DEG C, stir slag hitting, be sprinkled into No. 5 solvents as refining agent fully stirring; Melt temperature is controlled to 750 ± 10 DEG C, leaves standstill 45-60 minute, complete refining process; Subsequently melt is down to 720-690 DEG C of scope and pours into a mould, adopt metal casting mould, mould temperature 300-400 DEG C;
(5) strand prepared above-mentioned steps need be carried out to homogenizing annealing processing, its method is that billet is heated up with stove, is slowly heated to 380-430 DEG C of scope, insulation 12-24 hour, the air cooling of coming out of the stove;
(6) according to the shape of high heat conductive magnesium alloy goods, adopt extruding, rolling and forging method, alloy is processed into the various goods of bar, section bar, sheet material, its suitable heat distortion temperature scope is 320 DEG C-430 DEG C.
The method can be got rid of more impurity element in magnesium alloy, reduces the impact of impurity element alloy thermal conductivity, prepares the magnesium alloy that thermal conductivity is higher.
Three, test result.
According to ASTME1461 standard, magnesium alloy materials described in the embodiment of the present invention is processed into after extruding to the disc-shaped sample of standard, adopt laser heat conducting instrument NETZSCHLFA447 to measure its thermal conductivity, by finding out in embodiment table, at ambient temperature, thermal conductivity is greater than 130W/mK to this magnesium alloy materials. And according to the standard of GB GB228-2002, magnesium alloy materials described in the embodiment of the present invention is processed into standard tensile sample after extruding and carries out tension test, stretching sample is pole shape, its axis direction is parallel to the longitudinal of material. From embodiment above, result can find out that tensile strength is greater than 250MPa, and yield strength is greater than 200MPa, and percentage elongation is greater than 20%. Heat conductive magnesium alloy of the present invention has better thermal conductivity and mechanical property. Can be as cooling system structure materials such as power supply, electronic device and LED heat sink section bars in Aero-Space.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (2)
1. a composition proportion method for definite heat conductive magnesium alloy, is characterized in that, comprises the following steps:
(1) according to the purity of pure magnesium material, the selected content range of preparing required interpolation Mn in heat conductive magnesium alloy: 0.25-0.48wt.%, the high purity magnesium for Fe content in 30ppm, Mn is containing measuring 0.3 ± 0.05wt.%; The pure magnesium of one-level for Fe content range between 80ppm ~ 120ppm, Mn is containing measuring 0.48wt.%;
(2) determine that in heat conductive magnesium alloy, Ce content range is 0.05-1.0wt.%, the content that changes Zn is prepared the alloy of different numberings, obtains the best alloy of thermal conductivity, and the Zn content that defines this alloy is optimum Zn content;
(3) the optimum Zn content of optional step (2) gained, changes the alloys that Ce content in alloy is prepared different numberings, obtains the best alloy of thermal conductivity, and defining the mass ratio of Zn content and Ce content in this alloy is Zn/Ce best in quality proportioning;
(4) thermal conductivity of all alloys of preparing in (2) and (3) step is compared, add up Zn content and the Ce content of the alloy of thermal conductivity more than 130W/mK, obtain the optimization content range of Zn and Ce;
(5) according to step (3) and the Zn/Ce best in quality proportioning of (4) acquisition and the optimization content range of Zn and Ce, preparation Zn and Ce content change in the optimization content range of described Zn, Ce, and Zn/Ce mass ratio is some alloys of described Zn/Ce best in quality proportioning, chooses the composition proportion of the alloy that thermal conductivity is the highest as the composition proportion of heat conductive magnesium alloy; That is:
The component content of magnesium alloy is: Zn:2.02wt.%, and Mn:0.41wt.%, Ce:0.41wt.%, inevitable impurity≤0.15wt.%, all the other are Mg.
2. a preparation method for heat conductive magnesium alloy, is characterized in that, comprises the following steps:
(1) taking purity higher than 99.95% the pure magnesium of one-level, purity higher than 99.98% pure zinc ingot, magnesium manganese intermediate alloy that Mn content is less than 4wt.%, magnesium cerium intermediate alloy that Ce content is less than 35wt.% as raw material, for subsequent use after mechanical grinding scale removal; According to the percentage by weight of magnesium alloy composition be: Zn:2.02wt.%, Mn:0.41wt.%, Ce:0.41wt.%, inevitable impurity≤0.15wt.%, all the other are Mg; Calculate batching;
(2) whole magnesium ingots and pure zinc ingot are placed in the mild steel melting kettle of melting furnace, at CO2+0.5%SF6Under gas shield, it is melted completely, in the time that magnesium melt temperature rises to 750 ± 20 DEG C, the magnesium cerium intermediate alloy that is preheating to 300-400 DEG C is added lentamente, stir, after slag hitting, heat up;
(3) in the time that magnesium melt temperature is warmed up to 800-820 DEG C, the magnesium manganese intermediate alloy that is preheating to 300-400 DEG C is added in magnesium melt lentamente, stir and it was fully dissolved in 3-5 minute, then make melt cooling;
(4) in the time that magnesium melt is cooled to 740 ± 10 DEG C, stir slag hitting, be sprinkled into No. 5 solvents as refining agent fully stirring; Melt temperature is controlled to 750 ± 10 DEG C, leaves standstill 45-60 minute, complete refining process; Subsequently melt is down to 720-690 DEG C of scope and pours into a mould, adopt metal casting mould, mould temperature 300-400 DEG C;
(5) strand prepared above-mentioned steps is carried out to homogenizing annealing processing, its method is that billet is heated up with stove, is slowly heated to 380-430 DEG C of scope, insulation 12-24 hour, the air cooling of coming out of the stove;
(6) according to the shape of heat conductive magnesium alloy goods, adopt extruding, rolling and forging method, alloy is processed into the various goods of bar, section bar, sheet material, its suitable heat distortion temperature scope is 320 DEG C-430 DEG C.
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| CN104651689B (en) * | 2015-02-28 | 2018-10-09 | 重庆大学 | A kind of high heat conductance magnesium alloy and preparation method thereof used under high temperature environment |
| CN104846246A (en) * | 2015-05-29 | 2015-08-19 | 苏州慧驰轻合金精密成型科技有限公司 | Novel die-casting rare earth Mg alloy with high thermal conductivity and preparation method of novel die-casting rare earth Mg alloy |
| CN106995908B (en) * | 2016-01-22 | 2018-07-20 | 中国科学院金属研究所 | A kind of efficient rolling method of weak non-textured magnesium alloy plate |
| CN107043880A (en) * | 2017-06-27 | 2017-08-15 | 佛山科学技术学院 | A kind of rare earth heat conductive magnesium alloy and preparation method thereof |
| GB2583482A (en) | 2019-04-29 | 2020-11-04 | Univ Brunel | A casting magnesium alloy for providing improved thermal conductivity |
| CN111455246A (en) * | 2020-03-02 | 2020-07-28 | 华南理工大学 | High-thermal-conductivity magnesium alloy and preparation method thereof |
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