CN102925775A - Low-deformation-resistance wrought magnesium alloy and preparation method thereof - Google Patents
Low-deformation-resistance wrought magnesium alloy and preparation method thereof Download PDFInfo
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Abstract
The invention belongs to the technical field of non-ferrous metal alloys, and specifically discloses a low-deformation-resistance wrought magnesium alloy and a preparation method thereof. On the basis of an AZ61 magnesium alloy, in percentage by weight, Mn in an alloying element is increased to 0.65-1.2%, and 0.4-1.0% of RE and 0.2-1.0% of Bi are added. According to the invention, through carrying out multi-component alloying based on the AZ61 magnesium alloy, an obtained novel wrought magnesium alloy is low in hot-working deformation-resistance, and an obtained wrought profile is high in room temperature strength, so that an effect of solving the problem that large thin-walled and complex-shaped magnesium alloy profiles are difficult to extrude because the required extrusion force is too large is extremely facilitated, and the strength of the wrought profile is improved, therefore, the wrought magnesium alloy has a practical application value in the preparation and application of high-performance, large-dimension, thin-walled and complex-shaped magnesium alloy profiles. In addition, the preparation method disclosed by the invention is easy to operate; and because the adding amounts of rare earth elements and bismuth which are high in price are less, the increasing of the preparation cost of the alloy is limited.
Description
Technical field
The invention belongs to the non-ferrous metal alloy technical field, relate to a kind of low resistance to deformation wrought magnesium alloys and preparation method thereof.
Background technology
Magnesium alloy is the present structural metallic materials of available lightweight, have specific tenacity, specific rigidity is high, vibration damping, electromagnetic shielding and capability of resistance to radiation are strong, easily machining, the series of advantages such as easy recovery are described as " commercial environmental protection of 21 century and ecological structural metallic materials ".Have a wide range of applications at high-technology fields such as aerospace, weaponry, automobile, 3C Products.Along with day being becoming tight and environmental protection problem of international energy in recent years, day by day urgent to the structured material lightweight requirements, greatly stimulated especially the development of magnesium alloy.
Because magnesium is the hexagonal closs packing crystalline structure, magnesium alloy plastic deformation ability is relatively poor, so the magnesium-alloy material major part realizes with casting technique.Present magnesium-alloy material is with foundry goods, and particularly die casting is in the majority.But, to compare with cast magnesium alloys, wrought magnesium alloys has higher obdurability, and can obtain more diversified dimensions.Therefore, one of main development of following magnesium alloy is devoted to the wrought magnesium alloys product that Application and Development has good viscous deformation performance and use properties exactly.In all magnesium alloy plastic deformation modes, crimp can be brought into play material plasticity to greatest extent.And extruding can obtain the multiple magnesium alloy deformation section products such as rod, pipe, section bar, has broad application prospects in fields such as building, the vehicles, aircraft industry.Therefore crimp is the Main Means that obtains the magnesium alloy deformation material.But because the intrinsic Patterns for Close-Packed Hexagonal Crystal structure problem of magnesium alloy, even if adopt crimp, plastic deformation ability is still relatively poor.Be in particular in extruding rate low (only have 1/4th of aluminium alloy extruded speed, otherwise transverse fissure appearring in squeezing prod), large size, the complex-shaped required too large pinch processing difficulties of squeeze of thin-walled extruded section.At present, along with the development of bullet train, track traffic and space industry and to the lightweight an urgent demand, day by day urgent to high-performance (mainly being high strength), large specification, complex-shaped thin-wall Mg alloy extruded section demand.Therefore, develop that to have the novel wrought magnesium alloys of high room temperature strength after a kind of low resistance to deformation (reducing squeeze), the distortion significant.
Used wrought magnesium alloys mainly contains Mg-Al system, Mg-Zn-Zr system, Mg-Li and Mg-Mn system at present.Wherein Mg-Zn-Zr and Mg-Li are tied to form relatively difficulty of high a, preparation, and Mg-Mn is that intensity is lower.Mg-Al is that intensity is medium, and cost is lower, and preparation technology is ripe, and has preferably weldability and solidity to corrosion, therefore is to use at present more widely wrought magnesium alloys series.Be associated at Mg-Al and also contain a small amount of zinc and manganese in the gold.Wherein AZ61 alloy (containing aluminium about 6%) has preferably that intensity cooperates with plasticity, and application prospect is better.
If can be on the basis of AZ61 wrought magnesium alloys, carry out the multielement microalloying, when improving distortion material room temperature strength, by changing Plastic Deformation Mechanism, reduce the thermal processing distortion drag, exist in present magnesium alloy large size, thin-walled, the preparation of complicated shape section bar solving undoubtedly, because the problem of the too large pinch difficulty of required squeeze and squeeze wood undercapacity is significant.
Contriver place seminar once was studied (ten thousand common people, Mn and RE are on the impact [D] of AZ61 wrought magnesium alloys tissue and performance, Zhengzhou University, 2011) on " Mn and RE are on the impact of AZ61 wrought magnesium alloys tissue and performance ".The result shows, is 0.7312% at manganese content, content of rare earth has lower resistance to deformation when being 0.39%, but the intensity of alloy is lower; Along with the reduction of " Mn/RE " ratio, intensity increases, but resistance to deformation increases thereupon.Seminar is further studies show that carry out on the basis of this Master's thesis, the form of aluminium-manganese phase and rare-earth phase and resistance to deformation and the room temperature strength of distribution alloy have remarkably influenced.So, on the early-stage Study basis, take measures, when further reducing the alloy deformation drag, make the distortion material have higher room temperature strength and have important research and actual value.
Summary of the invention
The purpose of this invention is to provide wrought magnesium alloys that a kind of resistance to deformation is low and the section bar room temperature strength is high and preparation method thereof.
For achieving the above object, the technical scheme taked of the present invention is as follows:
A kind of low resistance to deformation wrought magnesium alloys, on the basis of AZ61 magnesium alloy, by weight percentage, Mn(manganese in its alloying element) be increased to 0.65-1.2%, add simultaneously the RE(rare earth) 0.4-1.0%, Bi(bismuth) 0.2-1.0%.
Preferably, RE is the Ce(cerium) or cerium-rich mischmetal.Cerium content is greater than 60wt% in the described cerium-rich mischmetal.
The preparation method, step is as follows:
1. get the raw materials ready by the weight percent composition of alloying element: pure magnesium ingot, fine aluminium ingot, pure zinc ingot, anhydrous MnCl
2, pure cerium or cerium-rich mischmetal, pure bismuth ingot; (above purity all refers to technical pure)
2. with the cast steel crucible heating to dark red, sprinkle insulating covering agent on crucible inwall and bottom even ground, adding is through pure magnesium ingot, the fine aluminium ingot of preheating, and sprinkles equably insulating covering agent thereon, temperature rises to 700-740 ℃;
3. the pure zinc ingot after after furnace charge all melts, adding preheating;
4. after pure zinc ingot all melts, add the anhydrous MnCl after the preheating
2, stir with argon gas when reinforced; After the furnace charge fusing, leave standstill, be stirred to alloying constituent with argon gas more even;
5. be warming up to 760-780 ℃, pure cerium or cerium-rich mischmetal and pure bismuth ingot after the adding preheating after the insulation, manually drag for the end and stir, and are stirred to alloying constituent with argon gas more even, after leaving standstill, remove the oxidation sludge on the bottom of a pan and surface;
6. be cooled to 700-720 ℃, after leaving standstill, be cast into alloy.
Preferably, described insulating covering agent is JDMF.The total addition level of insulating covering agent is the get the raw materials ready 2-3% of gross weight of alloying element.
Preferably, step 4. in, left standstill 15-30 minute, argon gas stirred 5-10 minute.
Preferably, step 5. in, be incubated 20-40 minute, manually drag for the end and stirred 1-3 minute, argon gas stirred 1-2 minute, left standstill 10-30 minute.
Preferably, step 6. in, left standstill 15-30 minute.
Step 2., 3., 4., the effect of the preheating material described in 5. is to remove moisture content, temperature all is preferably 150-200 ℃.
For ease of the analytical test alloy property, the alloy cast ingot of the present invention's preparation can be done following further processing:
The extruding of section bar:
Ingot casting is carried out homogenizing process (homogenization temperature 350-420 ℃, time 6-24 hour), to put into pre-heated container in insulation under the 360-420 ℃ of temperature after 1-3 hour through the magnesium alloy blank that homogenizing is processed, be squeezed into bar at the Horizontal type hydraulic extrusion machine.Be used for characterizing resistance to deformation and the bar intensity of extrusion process.
Resistance to deformation and distortion material strength test method:
1) sign of resistance to deformation
Utilize extruding power (N), extrusion speed (V), blank sectional area (S), the extrusion ratio (α) of extrusion machine in the extrusion process to characterize resistance to deformation (σ).
2) bar intensity
With reference to GB6397-86 standard processing tension specimen, utilize stretching test machine determination bar intensity.
Inventive point of the present invention: on the basis of AZ61 magnesium alloy, improve the content of manganese, add simultaneously an amount of rare earth and bismuth, control aluminium-manganese phase and rare-earth phase form and distribution and make its refinement by Effect of bismuth, and then the twin ratio in the change thermal deformation process, promote dynamic recrystallization, change deformation mechanism, form simultaneously particle strengthening and refined crystalline strengthening, reach the purpose that improves the section bar room temperature strength in the resistance to deformation in reducing hot extrusion process; For the magnesium alloy profiles that pushes large size, thin-walled, complicated shape provides the novel wrought magnesium alloys that a kind of resistance to deformation is low and the section bar room temperature strength is high.
Advantage of the present invention and positively effect:
(1) on the basis of AZ61 magnesium alloy, carry out multi-element alloyedly, the novel wrought magnesium alloys of acquisition is when having low thermal processing distortion drag, and the distortion material room temperature strength that obtains is high.Not only to solving large thin-wall, complex-shaped magnesium alloy profiles extruding since required squeeze to cause too greatly pushing hard problem very favourable, and improve simultaneously the intensity of distortion material.Preparation and application for high performance and big size, thin-walled, complex-shaped magnesium alloy profiles have actual application value;
(2) in addition, preparation method of the present invention, easy handling; Because rare earth element and bismuth add-on that price is higher are lower, the preparation cost of alloy increases limited.
Embodiment
The below is the preparation and extruding example of alloy of the present invention, and wherein, the cerium-rich mischmetal weight percent consists of cerium 65%, neodymium 10%, lanthanum 20%, praseodymium 5%; The purity of related raw material all refers to technical pure; And following instance is some the special points in alloying constituent of the present invention and the preparation process condition, and the present invention comprises it but is not limited only to it.
Embodiment 1
Alloying constituent (weight percent meter, below in like manner): Al 5.8%, Zn 0.8%, Mn 0.65%, Ce 0.6%, Bi 0.3%, Mg surplus.Get the raw materials ready by above alloying constituent: fine aluminium ingot, pure zinc ingot, anhydrous MnCl
2, pure cerium, pure bismuth ingot, pure magnesium ingot.
Magnesium alloy ingot preparation technology: 1. with the cast steel crucible heating to dark red (approximately 500 ℃), crucible inwall and bottom even sprinkle the JDMF insulating covering agent, add and be preheated to 200 ℃ pure magnesium ingot, fine aluminium ingot, and sprinkle equably the JDMF insulating covering agent thereon, temperature rises to 700 ℃, and wherein the total addition level of JDMF insulating covering agent is alloying element 2% of the gross weight of getting the raw materials ready.2. add after furnace charge all melts and be preheated to 200 ℃ pure zinc ingot.3. after pure zinc ingot all melted, adding was preheated to 150 ℃ anhydrous MnCl
2, use the Ar gas agitating when reinforced.After the furnace charge fusing, left standstill 16 minutes, stirred 10 minutes with argon gas again.4. be warming up to 760 ℃, add and to be preheated to 200 ℃ pure cerium and pure bismuth ingot, be incubated after 30 minutes, manually drag for the end and stirred 2 minutes, stirred 1 minute with argon gas again, leave standstill 10 minutes after, remove the bottom of a pan and surperficial oxidation sludge.5. be cooled to 700 ℃, left standstill 15 minutes, be cast into the alloy bar ingot casting of φ 120mm.
Particularly, the homogenizing of the present embodiment and extrusion process are as follows:
Extrusion process: 360 ℃ of homogenizing cast ingot temperature, 15 hours time.Adopt the horizontal forward extrusion machine of 800t to be squeezed into the alloy bar material of φ 30mm.360 ℃ of bar Heating temperatures, soaking time 2 hours.340 ℃ of container temperature, 2.5 m/mins of extrusion speeds.
As a comparison, adopt same technique to prepare AZ61 magnesium alloy ingot (composition: Al 5.8%, Zn 0.8%, Mn 0.2%, Mg surplus), and adopt same homogenizing and extrusion process to prepare φ 30mm AZ61 magnesium alloy rod.
As a comparison, adopt same technique to prepare the previous work alloy cast ingot, previous work alloy one: Al 5.8%, Zn 0.8%, Mn 0.73%, cerium-rich mischmetal 0.39%, Mg surplus; Previous work alloy two: Al 5.8%, Zn 0.8%, Mn 0.68%, cerium-rich mischmetal 0.67%, the Mg surplus is (with reference to ten thousand common people, Mn and RE are on the impact [D] of AZ61 wrought magnesium alloys tissue and performance, Zhengzhou University, and adopt same homogenizing and extrusion process to prepare φ 30mm magnesium alloy rod interalloy composition in 2011).
Calculate resistance to deformation and the extruding gained bar intensity of gained and list in table 1.
Embodiment 2
Alloying constituent: Al 6.2%, Zn 0.6%, Mn 0.8%, pure cerium 0.8%, Bi 0.4%, the Mg surplus.Get the raw materials ready by above alloying constituent: fine aluminium ingot, pure zinc ingot, anhydrous MnCl
2, pure cerium, pure bismuth ingot, pure magnesium ingot.
Magnesium alloy ingot preparation technology: 1. with the cast steel crucible heating to dark red (approximately 500 ℃), crucible inwall and bottom even sprinkle the JDMF insulating covering agent, add and be preheated to 200 ℃ pure magnesium ingot, fine aluminium ingot, and sprinkle equably the JDMF insulating covering agent thereon, temperature rises to 720 ℃, and wherein the total addition level of JDMF insulating covering agent is alloying element 2.5% of the gross weight of getting the raw materials ready.2. add after furnace charge all melts and be preheated to 200 ℃ pure zinc ingot.3. after pure zinc ingot all melted, adding was preheated to 150 ℃ anhydrous MnCl
2, use the Ar gas agitating when reinforced.After the furnace charge fusing, left standstill 20 minutes, stirred 8 minutes with argon gas again.4. be warming up to 760 ℃, adding is preheated to 200 ℃ pure cerium and pure bismuth ingot, is incubated after 30 minutes, manually drags for the end and stirs 3 minutes, stirs 1 minute with argon gas again.After leaving standstill 20 minutes, remove the oxidation sludge on the bottom of a pan and surface.5. be cooled to 710 ℃, left standstill 20 minutes, be cast into the alloy bar of φ 120mm.
Particularly, the homogenizing of the present embodiment and extrusion process are as follows:
Extrusion process: 380 ℃ of homogenizing cast ingot temperature, 14 hours time.Adopt the horizontal forward extrusion machine of 800t to be squeezed into the alloy bar material of φ 30mm.380 ℃ of bar Heating temperatures, soaking time 2 hours.360 ℃ of container temperature, 2.5 m/mins of extrusion speeds.
As a comparison, adopt same technique to prepare AZ61 magnesium alloy ingot (composition: Al 6.2%, Zn 0.6%, Mn 0.2%, Mg surplus), and adopt same homogenizing and extrusion process to prepare φ 30mm AZ61 magnesium alloy rod.
Calculate resistance to deformation and the extruding gained bar intensity of gained and list in table 1.
Embodiment 3
Alloying constituent: Al 6.5%, Zn 0.6%, Mn 0.8%, cerium-rich mischmetal 0.8%, Bi0.6%, the Mg surplus.Get the raw materials ready by above alloying constituent: fine aluminium ingot, pure zinc ingot, anhydrous MnCl
2, cerium-rich mischmetal, pure bismuth ingot, pure magnesium ingot.
Magnesium alloy ingot preparation technology: 1. with the cast steel crucible heating to dark red (approximately 500 ℃), crucible inwall and bottom even sprinkle the JDMF insulating covering agent, add and be preheated to 200 ℃ pure magnesium ingot, fine aluminium ingot, and sprinkle equably the JDMF insulating covering agent thereon, temperature rises to 720 ℃, and wherein the total addition level of JDMF insulating covering agent is alloying element 3% of the gross weight of getting the raw materials ready.2. furnace charge all dissolves the pure zinc ingot that rear adding is preheated to 200 ℃.3. after pure zinc ingot all melted, adding was preheated to 150 ℃ anhydrous MnCl
2, use the Ar gas agitating when reinforced.After the furnace charge fusing, left standstill 20 minutes, stirred 6 minutes with argon gas again.4. be warming up to 770 ℃, adding is preheated to 200 ℃ cerium-rich mischmetal and pure bismuth ingot, is incubated after 30 minutes, manually drags for the end and stirs 2 minutes, stirs 2 minutes with argon gas again.After leaving standstill 10 minutes, remove the oxidation sludge on the bottom of a pan and surface.5. be cooled to 720 ℃, left standstill 20 minutes, be cast into the alloy bar of φ 120mm.
Particularly, the homogenizing of the present embodiment and extrusion process are as follows:
Extrusion process: 380 ℃ of homogenizing cast ingot temperature, 14 hours time.Adopt the horizontal forward extrusion machine of 800t to be squeezed into the alloy bar material of φ 30mm.380 ℃ of bar Heating temperatures, soaking time 2 hours.360 ℃ of container temperature, 2.5 m/mins of extrusion speeds.
As a comparison, adopt same technique to prepare AZ61 magnesium alloy ingot (composition: Al 6.5%, Zn 0.6%, Mn 0.4%, Mg surplus), and adopt same homogenizing and extrusion process to prepare φ 30mm AZ61 magnesium alloy rod.
Calculate resistance to deformation and the extruding gained bar intensity of gained and list in table 1.
Embodiment 4
Alloying constituent: Al 7.0%, Zn 0.65%, Mn 1.0%, cerium-rich mischmetal 1.0%, Bi 0.8%, the Mg surplus.Get the raw materials ready by above alloying constituent: fine aluminium ingot, pure zinc ingot, anhydrous MnCl
2, cerium-rich mischmetal, pure bismuth ingot, pure magnesium ingot, wherein the cerium-rich mischmetal weight percent consists of cerium 65%, neodymium 10%, lanthanum 20%, praseodymium 5%.
Magnesium alloy ingot preparation technology: 1. with the cast steel crucible heating to dark red (approximately 500 ℃), crucible inwall and bottom even sprinkle the JDMF insulating covering agent, add and be preheated to 200 ℃ pure magnesium ingot, fine aluminium ingot, and sprinkle equably the JDMF insulating covering agent thereon, temperature rises to 740 ℃, and wherein the total addition level of JDMF insulating covering agent is alloying element 2% of the gross weight of getting the raw materials ready.2. furnace charge all dissolves the pure zinc ingot that rear adding is preheated to 200 ℃.3. after pure zinc ingot all melted, adding was preheated to 150 ℃ anhydrous MnCl
2, use the Ar gas agitating when reinforced.After the furnace charge fusing, left standstill 20 minutes, stirred 10 minutes with argon gas again.4. be warming up to 780 ℃, adding is preheated to 200 ℃ cerium-rich mischmetal and pure bismuth ingot, is incubated after 30 minutes, manually drags for the end and stirs 3 minutes, stirs 2 minutes with argon gas again.After leaving standstill 30 minutes, remove the oxidation sludge on the bottom of a pan and surface.5. be cooled to 710 ℃, left standstill 20 minutes, be cast into the alloy bar of φ 120mm.
Extrusion process: 400 ℃ of homogenizing cast ingot temperature, 12 hours time.Adopt the horizontal forward extrusion machine of 800t to be squeezed into the alloy bar material of φ 30mm.400 ℃ of bar Heating temperatures, soaking time 1.5 hours.380 ℃ of container temperature, 2.5 m/mins of extrusion speeds.
As a comparison, adopt same technique to prepare AZ61 magnesium alloy ingot (composition: Al 7.0%, Zn 0.65%, Mn 0.5%, Mg surplus), and adopt same homogenizing and extrusion process to prepare φ 30mm AZ61 magnesium alloy rod.
Calculate resistance to deformation and the extruding gained bar intensity of gained and list in table 1.
As can be known from the above table: adopt extrusion process extruding of the present invention, alloy thermal processing distortion drag of the present invention reduces more than 20% than the AZ61 magnesium alloy, and ultimate strength and yield strength improve respectively more than 10% and 30%; The previous work alloy can not obtain the performance of " significantly improving distortion material intensity when significantly reducing the thermal processing distortion drag " that alloy of the present invention has.
Claims (10)
1. one kind low resistance to deformation wrought magnesium alloys, it is characterized in that: on the basis of AZ61 magnesium alloy, by weight percentage, Mn is increased to 0.65-1.2% in its alloying element, adds simultaneously RE 0.4-1.0%, Bi 0.2-1.0%.
2. low resistance to deformation wrought magnesium alloys as claimed in claim 1, it is characterized in that: RE is Ce or cerium-rich mischmetal.
3. low resistance to deformation wrought magnesium alloys as claimed in claim 2, it is characterized in that: cerium content is greater than 60wt% in the described cerium-rich mischmetal.
4. method for preparing such as the described low resistance to deformation wrought magnesium alloys of any one of claim 1 ~ 3 is characterized in that step is as follows:
1. get the raw materials ready by the weight percent composition of alloying element: pure magnesium ingot, fine aluminium ingot, pure zinc ingot, anhydrous MnCl
2, pure cerium or cerium-rich mischmetal, pure bismuth ingot;
2. with the cast steel crucible heating to dark red, sprinkle insulating covering agent on crucible inwall and bottom even ground, adding is through pure magnesium ingot, the fine aluminium ingot of preheating, and sprinkles equably insulating covering agent thereon, temperature rises to 700-740 ℃;
3. the pure zinc ingot after after furnace charge all melts, adding preheating;
4. after pure zinc ingot all melts, add the anhydrous MnCl after the preheating
2, stir with argon gas when reinforced; After the furnace charge fusing, leave standstill, be stirred to alloying constituent with argon gas more even;
5. be warming up to 760-780 ℃, pure cerium or cerium-rich mischmetal and pure bismuth ingot after the adding preheating after the insulation, manually drag for the end and stir, and are stirred to alloying constituent with argon gas more even, after leaving standstill, remove the oxidation sludge on the bottom of a pan and surface;
6. be cooled to 700-720 ℃, after leaving standstill, be cast into alloy.
5. preparation method as claimed in claim 4, it is characterized in that: described insulating covering agent is JDMF.
6. such as claim 4 or 5 described preparation methods, it is characterized in that: the total addition level of insulating covering agent is the get the raw materials ready 2-3% of gross weight of alloying element.
7. preparation method as claimed in claim 6 is characterized in that: step 4. in, left standstill 15-30 minute, argon gas stirred 5-10 minute.
8. preparation method as claimed in claim 7 is characterized in that: step 5. in, be incubated 20-40 minute, manually drag for the end and stirred 1-3 minute, argon gas stirred 1-2 minute, left standstill 10-30 minute.
9. preparation method as claimed in claim 8 is characterized in that: step 6. in, left standstill 15-30 minute.
10. preparation method as claimed in claim 9 is characterized in that: step 2., 3., 4., the preheating temperature described in 5. is 150-200 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104046872A (en) * | 2014-06-09 | 2014-09-17 | 广东省工业技术研究院(广州有色金属研究院) | Bi-containing deforming magnesium alloy |
| CN104630585A (en) * | 2015-02-03 | 2015-05-20 | 闻喜县瑞格镁业有限公司 | High-strength magnesium alloy for ultrathin-wall components and preparation method thereof |
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| CN102242299A (en) * | 2011-07-26 | 2011-11-16 | 中国科学院金属研究所 | Bi and Nd composite reinforced high-strength cast magnesium alloy and preparation method thereof |
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| CN102242299A (en) * | 2011-07-26 | 2011-11-16 | 中国科学院金属研究所 | Bi and Nd composite reinforced high-strength cast magnesium alloy and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104046872A (en) * | 2014-06-09 | 2014-09-17 | 广东省工业技术研究院(广州有色金属研究院) | Bi-containing deforming magnesium alloy |
| CN104046872B (en) * | 2014-06-09 | 2016-09-21 | 广东省材料与加工研究所 | A kind of wrought magnesium alloy Han Bi |
| CN104630585A (en) * | 2015-02-03 | 2015-05-20 | 闻喜县瑞格镁业有限公司 | High-strength magnesium alloy for ultrathin-wall components and preparation method thereof |
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