CN105648370B - A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings - Google Patents
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings Download PDFInfo
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- CN105648370B CN105648370B CN201610076414.1A CN201610076414A CN105648370B CN 105648370 B CN105648370 B CN 105648370B CN 201610076414 A CN201610076414 A CN 201610076414A CN 105648370 B CN105648370 B CN 105648370B
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- 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
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- 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
- C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
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Abstract
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings, it is using stage solid solution and the heat treatment method of stepped aging to Mg Y Nd Mg alloy castings, solid solution and timeliness are considered as an entirety, i.e., carry out three-level artificial aging successively after casting heating being carried out into one-level solid solution, two grades of solid solutions successively：By controlling solid solubility temperature, soaking time and aging temp and soaking time, during the Precipitation of hardening constituent containing Nd, Y element is in solid solution condition, ensure that compound containing Nd is not grown up during the Precipitation of compound containing Y again, reach that Precipitation reinforcing phase amount is more, it is tiny, it also avoid the crystal grain during solid solution and grow up, be improved the mechanical property of alloy.Technology for Heating Processing of the present invention is simple, without carrying out any transformation to current thermal treatment equipment, the obtained more conventional processing of alloy mechanical property improves more than 10%, easily realizes industrialized production, and a simple efficient effective way is provided to improve large scale rare-earth Mg alloy castings.
Description
Technical field
The present invention relates to the preparation method of Mg alloy castings, it is a kind of heat treatment work of Mg-Y-Nd Mg alloy castings to refer in particular to
Skill；Belong to magnesium alloy and technical field of heat treatment technology.
Background technology
Mg-Y-Nd series magnesium alloys are as using most wide magnesium-rare earth, with its outstanding mechanical behavior under high temperature in boat
The fields such as sky, space flight are widely used.The alloy can prepare various large scales, shape using the method for low pressure casting
Complicated various aviation components.Due to the addition of Y and Nd elements in alloy, Mg can be formed41Nd5、Mg24Y5And Mg14Nd2Y etc.
Compound, so as to play a part of reinforcing.But these compounds for playing invigoration effect need to be formed in ag(e)ing process, and
The thick compound formed in casting process can not play invigoration effect, therefore when the alloy is heat-treated firstly the need of general
The thick compound of casting process formation dissolves in matrix, it is separated out in the form of small and dispersed by way of timeliness.
Based on the strengthening mechanism of the serial magnesium alloys of Mg-Y-Nd, the T6 Technologies for Heating Processing pair of current widely used solid solution+timeliness
Alloy is heat-treated, i.e., heating makes alloying element dissolve in matrix at high temperature, and timeliness is then carried out at a lower temperature makes it
Separate out.Current result of study is deployed mainly for solid solubility temperature, solution time and aging temp and aging time, leads to
Cross and seek that there is preferable mechanical property after a kind of optimal temperature and time combination makes alloy heat treatment.
Although the alloying level of Mg-Y-Nd series magnesium alloys is higher, prior art is using solid solution+timeliness
After T6 Technologies for Heating Processing are heat-treated to alloy, according to document (the organization and performance research of Zhang Na, Mg-Y-Nd alloy, Jilin
University's master thesis, 2007) record, strength of alloy index thus, limits Mg-Y- only up to 275MPa
Application of the Nd series magnesium alloys under many fields or operating mode, this area is it has long been desirable to Mg-Y-Nd can be effectively improved
The mechanical property of serial magnesium alloy, but up to now, substantial improvement is not obtained, therefore, it is necessary to Mg-Y-Nd magnesium
Alloy heat treatment process is optimized, to meet requirement of the different field to alloy mechanical property.
The content of the invention
A kind of technique is provided it is an object of the invention to overcome the deficiency of prior art simply, and technology is reasonable, Neng Gou great
Amplitude improves the heat treatment method of large scale rare-earth Mg alloy castings mechanical property.
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings of the present invention, comprises the steps：
The first step：Grade and stage
Casting heating is subjected to one-level solid solution, two grades of solid solutions successively；
450~480 DEG C of one-level solid solution holding temperature, soaking time 15~20 hours；It is preferred that soaking time for 15-16 it is small
When；After one-level solid solution insulation terminates, continuing to heat up carries out two grades of solid solutions；
Two grades of 540~550 DEG C of solid solution holding temperatures, soaking time 2~3 hours, soaking time preferably is small for 2.5-3
When；Then, strong wind cooling after coming out of the stove, 200~250 DEG C/h of cooling velocity.
Second step：It is classified artificial aging
Workpiece after first step solution treatment is subjected to three-level artificial aging successively：
One-level artificial aging technique is：300~320 DEG C of aging temp, soaking time 3~5 hours, soaking time preferably
For 4-5 hours, the type of cooling：Come out of the stove air cooling；
Two grades of artificial aging techniques are：When 200~250 DEG C of aging temp, soaking time 15~20 hours, preferred insulation
Between be 15-18 hours, the type of cooling：Come out of the stove air cooling；
Three-level artificial aging technique is：When 150~180 DEG C of aging temp, soaking time 20~30 hours, preferred insulation
Between be 22-30 hours, the type of cooling：Come out of the stove air cooling.
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings of the present invention, one-level solution heat heating speed
Spend for 200~220 DEG C/h；Two grades of solution heat programming rates are 50~100 DEG C/h.
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings of the present invention,
In three-level artificial aging technical process, 150~200 DEG C/h is per one-level artificial aging heat temperature raising speed.
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings of the present invention, casting is carried out successively one-level and consolidated
Molten, two grades of solid solutions, one-level artificial aging, two grades of artificial agings, three-level artificial agings, the order of each step can not be exchanged.
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings of the present invention, workpiece strength after treatment
More than 10% is improved after more conventional PROCESS FOR TREATMENT, its tensile strength is more than or equal to 300MPa, yield strength is more than or equal to 200MPa,
Elongation is more than or equal to 5%.
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings of the present invention, handled magnesium-rare earth casting
Part raw material are Mg-Y-Nd magnesium alloys.
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings of the present invention, the Mg-Y-Nd magnesium alloys bag
Following components are included, are constituted by mass percentage：
Y 3.5~4.0%；Nd 2.3~2.6%；Zr 0.4~0.5%；Gd 0.3~0.4%；Other element total amounts are small
In 0.5%；Surplus is Mg.
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings of the present invention, handled magnesium-rare earth casting
Part is prepared using the method for low pressure casting, and casting section thickness thickness is 60mm, and thinnest part is 30mm, and planimetric area is more than
0.5m2, weight is more than 40Kg.
A kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings of the present invention, to magnesium-rare earth cast(ing) surface
Polished, removed the viscous husky and oxide on surface, and cleaned with mixed acid solution, after cleaning, is heat-treated.
Inventor combines Mg-Y and Mg-Nd phasors, by the discovery that studies for a long period of time：The limit of Y element and Nd elements in Mg
Solid solubility has a very big difference, and the solid solubility in room temperature also has very big difference.In solution treatment, Nd elements need
Higher temperature could realize complete solid solution, and the solid solubility temperature of Y element is then much lower, if from single solid solubility temperature,
Complete solid solution could be realized by then needing the higher temperature of correspondence and longer time, and such case also easily makes crystal grain
Grow up, be unfavorable for the mechanical property of alloy.That is Nd elements can not realize abundant solid solution during low temperature solid solution, and high temperature solid solution
When, although Nd and Y element there occurs solid solution, but crystal grain is also grown up.In Ageing Treatment, the hardening constituent containing Nd needs
Separate out at a higher temperature, and when at relatively high temperatures, solid solubility of the Y in Mg is still larger, that is to say, that now containing Y's
Compound can't be separated out completely, and more Y element solid solution, necessarily reduces the quantity of precipitated phase in Mg matrixes.
Based on above result of study, invention devises the heat using stage solid solution and stepped aging to magnesium-rare earth casting
Processing method, an entirety is considered as by solid solution and timeliness, during the Precipitation of hardening constituent containing Nd, and Y element is in solid solution
Ensure that compound containing Nd is not grown up, and contains more precipitations in final alloy during state, the Precipitation of compound containing Y again
Hardening constituent, is improved the mechanical property of alloy.
In the present invention, the mechanism and technique effect of grade and stage and classification artificial aging are briefly described as below：
One-level solid solution：The segregation containing Y in cast alloy can be made mutually to dissolve in Mg matrixes, the uniform solid solution of Y element is realized,
Now relatively low temperature can both realize the solid solution of Y element, while avoiding growing up for crystal grain.
Two grades of solid solutions：Realize and the super saturated solid solution containing Y and Nd elements is formed after the solid solution of Nd elements in alloy, cooling
Body, shorter soaking time can also avoid growing up for crystal grain.
One-level artificial aging：Insulating process realizes the pre- precipitation of the hardening constituent containing Nd, while so that the 4th step cooling procedure
The hardening constituent containing Y of middle precipitation is again in the Mg matrixes of solid solution.
Two grades of artificial agings：Insulating process make it that hardening constituent containing Nd is fully separated out, and the hardening constituent containing Y pre- precipitation.
Three-level artificial aging：Insulating process ensure that the abundant precipitation of the hardening constituent containing Y, while controlling hardening constituent containing Nd not long
Greatly.
The present invention can make up existing due to being heat-treated using above-mentioned process to the magnesium-rare earth of low pressure casting
The deficiency of Technology for Heating Processing, greatly improves the mechanical property of alloy.According to the limit solid solubility tool of Y element and Nd elements in Mg
There is a very big difference, and the solid solubility in room temperature also has very big difference, and in solution treatment, Nd elements need higher temperature
Degree could realize complete solid solution, and the solid solubility temperature of Y element is then much lower, and during high temperature solid solution, although Nd and Y element occur
Solid solution, but crystal grain also grown up.In Ageing Treatment, the hardening constituent containing Nd needs to separate out at a higher temperature, and
When at relatively high temperatures, solid solubility of the Y in Mg is still larger.Rationally the group technology of design solid solution and timeliness, makes the first step
Y element abundant solid solution during heating, when second step is heated, the abundant solid solution of Nd elements, but ensure that crystal grain is not grown up, make to contain during timeliness
Nd hardening constituent is first separated out, and reduction temperature again separates out the hardening constituent containing Y, both ensure that reinforcing phase amount at most, is ensured again first
The hardening constituent of precipitation is not grown up.
It is an advantage of the invention that both ensure that Precipitation reinforcing phase amount was more using simple heat treatment method, carefully
It is small, it also avoid the crystal grain during solid solution and grow up.Technology for Heating Processing is simple, without carrying out any change to current thermal treatment equipment
Make, the more conventional processing of obtained alloy mechanical property is higher.
In summary, the present invention provides a simple efficient effectively way to improve large scale rare-earth Mg alloy castings
Footpath.
Brief description of the drawings：
Accompanying drawing 1 is Technology for Heating Processing route schematic diagram of the present invention.
Accompanying drawing 2 is the metallographic microstructure of alloy after comparative example Technology for Heating Processing is handled.
Accompanying drawing 3 is the metallographic microstructure of alloy after the Technology for Heating Processing of the embodiment of the present invention 2 is handled.
Accompanying drawing 4 is the TEM microscopic structures of alloy after the Technology for Heating Processing of the embodiment of the present invention 2 is handled.
Although from figures 2 and 3, it will be seen that improved using the more conventional technique of Technology for Heating Processing solid solubility temperature of the present invention,
But it is due to solution time is shorter, it is to avoid the crystal grain of alloy is grown up after heat treatment, final grain size and common process processing
Quite.
From fig. 4, it can be seen that passing through the reinforcing phase amount separated out in the multistage aging thermal treating process of the present invention, alloy
Many, size is tiny, is evenly distributed, it is ensured that alloy has higher mechanical property.
Embodiment：
Alloy property index after comparative example and embodiment processing of the present invention is shown in Table 1.
Comparative example
Composition (wt.%) is by this comparative example：Y 3.7%；Nd 2.8%；Zr 0.5%；Gd 0.4%, other elements are total
Amount≤0.5%；Surplus is Mg Mg-Y-Nd large scale Mg-Y-Nd alloy-steel castings.The casting section thickness thickness is 60mm, most
Thin place is 30mm, and planimetric area is more than 0.5m2.Cast obtained large scale cast(ing) surface to be polished, remove surface
Viscous husky and oxide, and cleaned with hydrochlorate.Casting after cleaning to be placed in electric furnace to be warming up to 525 DEG C of insulations with stove 10 small
When, rear strong wind cooling to room temperature, then by the part after cooling with stove be warming up to 225 DEG C insulation 20 hours after take out air cooling, institute
The tensile strength for obtaining part is 288MPa, and yield strength is 198MPa, and elongation is 4.5%.
Embodiment 1
The first step：Use low pressure casting method prepare a kind of each element mass percent for：Y 3.8%；Nd 2.5%；
Zr 0.45%；Gd 0.3%；Other element total amounts are less than 0.5%；Surplus is closed for Mg Mg-Y-Nd large scale Mg-Y-Nd
Golden casting.The casting section thickness thickness is 60mm, and thinnest part is 30mm, and planimetric area is more than 0.5m2.It is big that casting is obtained
Size cast(ing) surface is polished, and removes the viscous husky and oxide on surface, and is cleaned with hydrochlorate.Casting after cleaning is placed in
In resistance with 200 DEG C/h firing rate with stove heat to 450 DEG C and be incubated 15~16 hours, then with 50 DEG C/h heating
Speed with stove be warming up to 545 ± 5 DEG C insulation 2~3 hours after come out of the stove, it is air-cooled, will be air-cooled after part be placed in resistance with 150
DEG C/h firing rate is warming up to air cooling after 300 DEG C of insulations 5 hours with stove, then casting with 150 DEG C/h firing rate with stove
Be warming up to 200 DEG C insulation 20 hours after air cooling, then with 150 DEG C/h firing rate with stove be warming up to 150 DEG C be incubated 30 hours
Air cooling afterwards, the tensile strength of part after treatment is 308MPa, and yield strength is 215MPa, and elongation is 5.72%.
Embodiment 2
The first step：Use low pressure casting method prepare a kind of each element mass percent for：Y 3.5%；Nd 2.6%；
Zr 0.5%；Gd 0.35%；Other element total amounts are less than 0.5%；Surplus is closed for Mg Mg-Y-Nd large scale Mg-Y-Nd
Golden casting.The casting section thickness thickness is 60mm, and thinnest part is 30mm, and planimetric area is more than 0.5m2.It is big that casting is obtained
Size cast(ing) surface is polished, and removes the viscous husky and oxide on surface, and is cleaned with hydrochlorate.Casting after cleaning is placed in
To 475 DEG C and 15~16 hours are incubated with stove heat in resistance with 210 DEG C/h firing rate, then with 75 DEG C/h heating speed
Degree with stove be warming up to 545 ± 5 DEG C insulation 2~3 hours after come out of the stove, it is air-cooled, will be air-cooled after part be placed in resistance with 175 DEG C/h
Firing rate with stove be warming up to 310 DEG C insulation 4 hours after air cooling, then casting heated up with 175 DEG C/h firing rate with stove
To 225 DEG C insulation 17.5 hours after air cooling, then with 175 DEG C/h firing rate with stove be warming up to 175 DEG C insulation 25 hours after
Air cooling, the tensile strength of part after treatment is 325MPa, and yield strength is 210MPa, and elongation is 5.4%.
Embodiment 3
The first step：Use low pressure casting method prepare a kind of each element mass percent for：Y 4.0%；Nd 2.3%；
Zr 0.4%；Gd 0.4%；Other element total amounts are less than 0.5%；Surplus is Mg Mg-Y-Nd large scale Mg-Y-Nd alloys
Casting.The casting section thickness thickness is 60mm, and thinnest part is 30mm, and planimetric area is more than 0.5m2.Cast obtained big chi
Very little cast(ing) surface is polished, and removes the viscous husky and oxide on surface, and is cleaned with hydrochlorate.Casting after cleaning is placed in
In resistance with 220 DEG C/h firing rate with stove heat to 480 DEG C and be incubated 15~16 hours, then with 100 DEG C/h heating
Speed with stove be warming up to 545 ± 5 DEG C insulation 2~3 hours after come out of the stove, it is air-cooled, will be air-cooled after part be placed in resistance with 200
DEG C/h firing rate is warming up to air cooling after 320 DEG C of insulations 3 hours with stove, then casting with 200 DEG C/h firing rate with stove
Be warming up to 250 DEG C insulation 15 hours after air cooling, then with 200 DEG C/h firing rate with stove be warming up to 180 DEG C be incubated 20 hours
Air cooling afterwards, the tensile strength of part after treatment is 315MPa, and yield strength is 207MPa, and elongation is 5.62%.
Table 1
| Embodiment | Tensile strength (MPa) | Yield strength (MPa) | Elongation (%) |
| Comparative example | 288 | 198 | 4.5 |
| 1 | 308 | 215 | 5.72 |
| 2 | 325 | 210 | 5.4 |
| 3 | 315 | 207 | 5.62 |
It can be seen that from the data of table 1：Mg-Y-Nd magnesium alloys after being handled using present invention process method, its tension is strong
Degree >=308Mpa, yield strength >=207Mpa, elongation >=5.4%；Have compared with the alloy property after prior art processes processing
It is obviously improved.
Claims (5)
1. a kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings, comprises the steps：
The first step：Grade and stage
Casting heating is subjected to one-level solid solution, two grades of solid solutions successively；
450 ~ 480 DEG C of one-level solid solution holding temperature, after one-level solid solution insulation terminates, continuing to heat up carries out two grades of solid solutions；
Two grades of 540 ~ 550 DEG C of solid solution holding temperatures, after insulation terminates, are cooled to after coming out of the stove with 200 ~ 250 DEG C/h cooling velocity
Room temperature；
One-level solid solution soaking time 15 ~ 20 hours；
Two grades of solid solution soaking times 2 ~ 3 hours；
One-level solution heat programming rate is 200 ~ 220 DEG C/h；Two grades of solution heat programming rates are 50 ~ 100 DEG C/h；
Second step：It is classified artificial aging
Workpiece after first step solution treatment is subjected to three-level artificial aging successively：
One-level artificial aging technique is：300 ~ 320 DEG C of aging temp, the type of cooling：Come out of the stove air cooling；
Two grades of artificial aging techniques are：200 ~ 250 DEG C of aging temp, the type of cooling：Come out of the stove air cooling；
Three-level artificial aging technique is：150 ~ 180 DEG C of aging temp, the type of cooling：Come out of the stove air cooling；
One-level artificial aging soaking time 3 ~ 5 hours；
Two grades of artificial aging soaking times 15 ~ 20 hours；
Three-level artificial aging soaking time 20 ~ 30 hours；
In three-level artificial aging technical process, 150 ~ 200 DEG C/h is per one-level artificial aging heat temperature raising speed；
Handled magnesium-rare earth casting raw material are Mg-Y-Nd magnesium alloys；The Mg-Y-Nd magnesium alloys include following groups
Point, constitute by mass percentage：
Y 3.5~4.0%；Nd 2.3~2.6%；Zr 0.4~0.5%；Gd 0.3~0.4%；Other element total amounts are less than 0.5%；Surplus
For Mg.
2. a kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings according to claim 1, its feature exists
In：
One-level solid solution soaking time 15 ~ 16 hours；
Two grades of solid solution soaking times 2.5 ~ 3 hours；
One-level artificial aging soaking time 4 ~ 5 hours；
Two grades of artificial aging soaking times 15 ~ 18 hours；
Three-level artificial aging soaking time 22 ~ 30 hours.
3. a kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings according to claim 1 or 2, its feature
It is：Casting is carried out to one-level solid solution, two grades of solid solutions, one-level artificial aging, two grades of artificial agings, three-level artificial agings successively.
4. a kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings according to claim 3, its feature exists
In：Handled magnesium-rare earth casting is prepared using the method for low pressure casting, and casting section thickness thickness is 60mm, and thinnest part is
30mm, planimetric area is more than 0.5m2, weight is more than 40Kg.
5. a kind of Technology for Heating Processing for improving magnesium-rare earth mechanical castings according to claim 4, its feature exists
In：More than 10% is improved after the more conventional PROCESS FOR TREATMENT of workpiece strength after treatment, its tensile strength is more than or equal to 300MPa,
Yield strength is more than or equal to 200MPa, and elongation is more than or equal to 5%.
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| CN105951013B (en) * | 2016-06-27 | 2017-12-26 | 长沙新材料产业研究院有限公司 | A kind of low alloying magnesium alloy multistage heat treatment-strengthening process |
| CN106350756B (en) * | 2016-10-31 | 2018-02-09 | 中南大学 | A kind of homogenization heat treatment method of magnesium-rare earth casting |
| CN108456815A (en) * | 2018-01-24 | 2018-08-28 | 大连理工大学 | A kind of High-strength high-plasticity Mg-Gd-Y-Zr casting alloys and preparation method thereof from solute homogeneous model |
| CN109112450A (en) * | 2018-09-07 | 2019-01-01 | 中国兵器科学研究院宁波分院 | A kind of heat resistance casting magnesium alloy material heat treatment method |
| CN109022975B (en) * | 2018-09-09 | 2020-03-17 | 中南大学 | Method for improving strength and strain fatigue life of AQ80M magnesium alloy |
| CN109023175A (en) * | 2018-10-08 | 2018-12-18 | 吉林大学 | The heat treatment process of magnesium-rare earth |
| CN109554597A (en) * | 2018-11-29 | 2019-04-02 | 哈尔滨理工大学 | A kind of heat-treatable strengthened cast magnesium alloy and preparation method thereof |
| CN109881066B (en) * | 2019-03-29 | 2021-09-28 | 上海交通大学 | High-strength-toughness heat-resistant Mg-Gd alloy suitable for low-pressure casting and preparation method thereof |
| CN109797332B (en) * | 2019-03-29 | 2021-01-19 | 南京航空航天大学 | High-strength-toughness heat-resistant Mg-Gd-Y alloy suitable for low-pressure casting and preparation method thereof |
| CN109943760B (en) * | 2019-05-15 | 2021-04-02 | 湖南科技大学 | High-strength high-plasticity rare earth magnesium alloy and preparation method thereof |
| CN111926153B (en) * | 2020-08-28 | 2022-01-07 | 河南中原特钢装备制造有限公司 | Heat treatment process for improving coarse grain size of precipitation hardening stainless steel valve body |
| CN114807706B (en) * | 2022-05-16 | 2023-07-14 | 洛阳理工学院 | High-performance wrought magnesium alloy and preparation method thereof |
| CN114921701B (en) * | 2022-05-24 | 2023-06-02 | 洛阳理工学院 | Rare earth magnesium alloy and preparation method thereof |
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| GB0323855D0 (en) * | 2003-10-10 | 2003-11-12 | Magnesium Elektron Ltd | Castable magnesium alloys |
| WO2006036033A1 (en) * | 2004-09-30 | 2006-04-06 | Yoshihito Kawamura | High-strength and high-toughness metal and process for producing the same |
| CN101463442A (en) * | 2009-01-15 | 2009-06-24 | 上海交通大学 | Casting magnesium alloy containing Ag and heavy rare earth and preparation thereof |
| CN101716593A (en) * | 2009-12-04 | 2010-06-02 | 湖南大学 | Magnesium alloy sheet rolling method |
| AT510087B1 (en) * | 2010-07-06 | 2012-05-15 | Ait Austrian Institute Of Technology Gmbh | MAGNESIUM ALLOY |
| CN105154736B (en) * | 2015-10-23 | 2017-06-16 | 中国兵器工业第五九研究所 | A kind of heat resistance casting magnesium alloy and preparation method thereof |
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