CN104233026A - Heat-resistant magnesium alloy and preparation method thereof - Google Patents

Heat-resistant magnesium alloy and preparation method thereof Download PDF

Info

Publication number
CN104233026A
CN104233026A CN201410251362.8A CN201410251362A CN104233026A CN 104233026 A CN104233026 A CN 104233026A CN 201410251362 A CN201410251362 A CN 201410251362A CN 104233026 A CN104233026 A CN 104233026A
Authority
CN
China
Prior art keywords
alloy
magnesium alloy
heat resistance
temperature
resistance magnesium
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410251362.8A
Other languages
Chinese (zh)
Inventor
陈君
李梅菊
李全安
张清
李武会
刘文闯
陈晓亚
陈雷雷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Henan University of Science and Technology
Original Assignee
Henan University of Science and Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Henan University of Science and Technology filed Critical Henan University of Science and Technology
Priority to CN201410251362.8A priority Critical patent/CN104233026A/en
Publication of CN104233026A publication Critical patent/CN104233026A/en
Pending legal-status Critical Current

Links

Abstract

The invention discloses a heat-resistant magnesium alloy and a preparation method thereof. The heat-resistant magnesium alloy consists of the following components in percentage by mass: 3%-8% of Al, 0.5%-1.5% of Zn, 0.1%-0.7% of Sr, 0.3%-1.5% of CaO, and the balance of Mg and inevitable impurities. According to the heat-resistant magnesium alloy, Zn, an alkaline-earth element Sr and CaO are added into the Mg-Al alloy, so that the microscopic structure of the magnesium alloy is improved by multi-element micro-alloying, and thus, the mechanical performances of the magnesium alloy are improved; by reasonably selecting alloying elements and controlling the content of cheap adding elements, the collaborative invigorating effects of the components are brought into play, the mechanical performances and heat resistance of the magnesium alloy are improved; the microscopic structure is uniform, the alloy flame retardant property is excellent, and the room-temperature and high-temperature strength is high; the cheap additives are adopted to replace the rear earth, so that the cost of the magnesium alloy is greatly lowered on the basis of keeping high mechanical performances, and thus, the preparation method is suitable for popularization and application.

Description

A kind of heat resistance magnesium alloy and preparation method thereof
Technical field
The invention belongs to alloy material metal field, be specifically related to a kind of heat resistance magnesium alloy, also relate to a kind of preparation method of heat resistance magnesium alloy simultaneously.
Background technology
Mg-based hydrogen storage is structural metallic materials the lightest in engineer applied, all has very significant advantage in many Application Areass, particularly in aerospace, automobile and motorcycle and high speed light rail train, has the advantage being difficult to substitute.Current commercial magnesium alloy can be divided into cast magnesium alloys and the large class of wrought magnesium alloys two substantially.In cast magnesium alloys, AZ system is most widely used owing to having cheap price and good casting technique, mainly contain AZ91 series and AM60/50 serial, but there is the defect that plasticity is poor and hot strength is lower in this series alloy.
In order to meeting the market requirement, improve range of application and the field of magnesium alloy, researcher has carried out the research such as microalloying and grain refining to existing magnesium alloy, make every effort to the room temperature and the mechanical behavior under high temperature that improve magnesium alloy, alloy element used mainly contains the element such as rare earth element, alkaline earth element and aluminium, zinc, tin.Mg-Al-Si, Mg-Al-RE, Mg-Al-Ca, Mg-Al-Sn, Mg-Al-Ca-RE, the serial heat resistance magnesium alloy such as Mg-Y-Nd is successively developed, but, what be really applied in above-mentioned developed heat resistance magnesium alloy only has minority, as the AE42 alloy in Mg-Al-RE series, WE43 and WE54 in Mg-Y-Nd series, AS41 and AS21 etc. in AX51 and Mg-Al-Si series in Mg-Al-Ca series, these heat resistance magnesium alloys be applied are also because problems different separately makes range of application be restricted: if AE42 and WE43 etc. is all containing precious metal elements such as a large amount of RE, cost of alloy is higher limits its widespread use, and for AS41 and the AS21 alloy containing Si, there is the Mg2Si phase of thick Chinese character shape in its tissue, compromise its mechanical property.Therefore, be necessary to research and develop high, the intensity of economy and plasticity is good, creep property is excellent heat resistance magnesium alloy, the range of application of magnesium alloy can be expanded to a great extent, have very important significance.
Summary of the invention
The object of this invention is to provide a kind of heat resistance magnesium alloy, solve the problem that existing magnesium alloy can not take into account low cost and high use properties simultaneously.
Second object of the present invention is to provide a kind of preparation method of heat resistance magnesium alloy.
In order to realize above object, the technical solution adopted in the present invention is: a kind of heat resistance magnesium alloy, is made up of: 3% ~ 8%Al the component of following mass percent, 0.5% ~ 1.5%Zn, 0.1 ~ 0.7%Sr, 0.3% ~ 1.5%CaO, surplus is Mg and inevitable impurity.
Heat resistance magnesium alloy of the present invention is prepared from through solid solution and aging strengthening model for raw material melting and casting with magnesium, aluminium, zinc, calcium oxide and master alloy Mg-Sr.
A preparation method for above-mentioned heat resistance magnesium alloy, comprises the following steps:
1) by raw material magnesium, zinc, aluminium in the mixed gas protected lower fusing of CO2+SF6, form alloy molten solution A;
2) when the temperature of alloy molten solution A is 680 ~ 700 DEG C, add master alloy Mg-Sr and calcium oxide and be incubated 10min, after alloy all melts, removing surface scum, after being warming up to 720 DEG C, obtain alloy molten solution B;
3) treat that the temperature of alloy molten solution B is down to 680 DEG C, be cast in mould, obtain cast alloy;
4) to step 3) gained cast alloy heat-treats, and obtains described heat resistance magnesium alloy.
Through thermal pretreatment before described raw material magnesium, zinc, aluminium, master alloy Mg-Sr and calcium oxide use.
The temperature of described preheating is 150 ~ 200 DEG C.
Step 3) described in mould before casting through thermal pretreatment.
The temperature of described mould and die preheating process is 180 ~ 250 DEG C.
Step 4) described in thermal treatment be that solution treatment and actual effect process are carried out successively to cast alloy.
The temperature of described solution treatment is 415 ~ 430 DEG C, and the treatment time is 10 ~ 14h.After solution treatment, water-cooled is to room temperature.
The temperature of described ageing treatment is 200 ~ 250 DEG C, and the treatment time is 10 ~ 20h.After ageing treatment, air cooling is to room temperature.
Described solution treatment carries out under magnesium oxide powder covers.
Heat resistance magnesium alloy of the present invention, alloy compositions is Mg-Al-Zn-Sr-CaO.The present invention adopts Al element to be the first component, Al is alloying element important in magnesium alloy, very large solid solubility is had in magnesium matrix, obvious strengthening effect can be played, its strengthening effect performance both ways, one is the second-phase strength by forming Mg17Al12 phase, and two is by the solution strengthening of Al atom in magnesium matrix.Because Mg17Al12 phase is easy to softening, therefore in alloy, the content of Al controls below 8%, but the mobility of the too low Al castability particularly alloy that can damage magnesium alloy, and the content of Al should lower than 3%, therefore the Al content in magnesium alloy is 3% ~ 8%Al.In the present invention, the content of Zn is that 0.5% ~ 1.5%, Zn has solution strengthening and ageing strengthening dual function in the magnesium alloy, and the interpolation of Zn simultaneously can put forward heavy alloyed plasticity.Sr has lower density, can improve magnesium alloy high-temperature behavior, and it can improve the fusing point of Mg sosoloid in addition, in the magnesium alloy velocity of diffusion slowly and the mobility of alloy do not have a significant effect.Add a small amount of Ca in Mg-Al alloy and can improve its microstructure and mechanical property, Ca can crystal grain thinning, improve room temperature strength, also high-melting-point strengthening phase Al2Ca can be generated in the tissue, improve hot strength, but Ca is excessive can affect castability, CaO replaces Ca to be added in Mg-Al system alloy, a kind of raising magnesium alloy mechanical property of low cost more and the method for flame retardant properties, a small amount of CaO can substitute Ca beneficial effect played in the magnesium alloy, improve burning-point and the high temperature oxidation resistance of magnesium alloy, can Refining Mg Alloy microstructure so that improve its mechanical property, but CaO is excessive can affect castability, therefore CaO add-on of the present invention is not higher than 1.5%.
Heat resistance magnesium alloy of the present invention, alloy compositions is Mg-Al-Zn-Sr-CaO, by adding Zn, alkaline earth element Sr and CaO in Mg-Al alloy, utilizing multicomponent microalloying to improve the microstructure of magnesium alloy, and then improving its mechanical property; Choose reasonable alloy element, by controlling the content of cheap Addition ofelements, having played the cooperative reinforcing effect of each component, having improve mechanical property and the resistance toheat of magnesium alloy; Heat resistance magnesium alloy of the present invention, microstructure is even, alloy excellent fireproof performance, and room temperature tensile intensity can reach 257MPa, and tensile strength when 150 DEG C reaches 209MPa, and tensile strength when 200 DEG C reaches 172MPa, has higher room temperature and hot strength; Adopt cheap additive to replace rare earth, on the basis keeping higher mechanical property, significantly reduce the cost of magnesium alloy, be applicable to applying.
The preparation method of heat resistance magnesium alloy of the present invention, with magnesium, aluminium, zinc, calcium oxide and master alloy Mg-Sr for raw material melting and casting and through thermal treatment, gained Microstructure of Magnesium Alloy is even, and alloy excellent fireproof performance, has higher room temperature and hot strength; Raw materials used cheap and easy to get, the difficulty of melting and casting is low, and process is easy to control, and significantly reduces production cost, and technique is simple, easy to operate, is applicable to large-scale industrial production.
Embodiment
Below in conjunction with embodiment, the present invention is further illustrated.
The raw material magnesium (Mg) related in embodiment, aluminium (Al), zinc (Zn), calcium oxide (CaO) and master alloy Mg-Sr are commercially available prod.
Embodiment 1
The heat resistance magnesium alloy of the present embodiment, is made up of the component of following mass percent: 3%Al, 0.9%Zn, 0.7%Sr, 0.3%CaO, and surplus is Mg and inevitable impurity.Wherein, the total mass per-cent of impurity element S i, Fe, Cu and Ni is less than 0.2%.
The preparation method of the heat resistance magnesium alloy of the present embodiment, comprises the following steps:
1) by raw material magnesium, zinc, aluminium, master alloy Mg-Sr and calcium oxide particle preheating under 150 DEG C of conditions;
2) adopt corundum crucible, medium-frequency induction furnace melting, by the raw material magnesium after preheating, zinc, aluminium in the mixed gas protected lower fusing of CO2+SF6, form alloy molten solution A;
3) when the temperature of alloy molten solution A is 680 DEG C, add the master alloy Mg-Sr after preheating and calcium oxide particle and be incubated 10min, after alloy all melts, removing surface scum, stopping after temperature being risen to 720 DEG C heating up, obtain alloy molten solution B;
4) by steel die preheating under 210 DEG C of conditions, treat that the temperature of alloy molten solution B is down to 680 DEG C, be cast in the mould after preheating, obtain cast alloy;
5) to step 4) gained cast alloy carries out solution treatment and ageing treatment successively, and solution treatment is carried out under magnesium oxide powder covers, and treatment temp is 430 DEG C, and the treatment time is 10h, and rear water-cooled is to room temperature; The temperature of crash handling is 200 DEG C, and the treatment time is 20h, and rear air cooling, to room temperature, obtains the heat resistance magnesium alloy that alloy compositions is Mg-3Al-0.9Zn-0.7Sr-0.3CaO.
Embodiment 2
The heat resistance magnesium alloy of the present embodiment, is made up of the component of following mass percent: 6%Al, 1.5%Zn, 0.4%Sr, 0.8%CaO, and surplus is Mg and inevitable impurity.Wherein, the total mass per-cent of impurity element S i, Fe, Cu and Ni is less than 0.2%.
The preparation method of the heat resistance magnesium alloy of the present embodiment, comprises the following steps:
1) by raw material magnesium, zinc, aluminium, master alloy Mg-Sr and calcium oxide particle preheating under 200 DEG C of conditions;
2) adopt corundum crucible, medium-frequency induction furnace melting, by the raw material magnesium after preheating, zinc, aluminium in the mixed gas protected lower fusing of CO2+SF6, form alloy molten solution A;
3) when the temperature of alloy molten solution A is 690 DEG C, add the master alloy Mg-Sr after preheating and calcium oxide particle and be incubated 10min, after alloy all melts, removing surface scum, stopping after temperature being risen to 720 DEG C heating up, obtain alloy molten solution B;
4) by steel die preheating under 180 DEG C of conditions, treat that the temperature of alloy molten solution B is down to 680 DEG C, be cast in the mould after preheating, obtain cast alloy;
5) to step 4) gained cast alloy carries out solution treatment and ageing treatment successively, and solution treatment is carried out under magnesium oxide powder covers, and treatment temp is 420 DEG C, and the treatment time is 12h, and rear water-cooled is to room temperature; The temperature of crash handling is 230 DEG C, and the treatment time is 15h, and rear air cooling, to room temperature, obtains the heat resistance magnesium alloy that alloy compositions is Mg-6Al-1.5Zn-0.4Sr-0.8CaO.
Embodiment 3
The heat resistance magnesium alloy of the present embodiment, is made up of the component of following mass percent: 8%Al, 0.5%Zn, 0.1%Sr, 1.5%CaO, and surplus is Mg and inevitable impurity.Wherein, the total mass per-cent of impurity element S i, Fe, Cu and Ni is less than 0.2%.
The preparation method of the heat resistance magnesium alloy of the present embodiment, comprises the following steps:
1) by raw material magnesium, zinc, aluminium, master alloy Mg-Sr and calcium oxide particle preheating under 175 DEG C of conditions;
2) adopt corundum crucible, medium-frequency induction furnace melting, by the raw material magnesium after preheating, zinc, aluminium in the mixed gas protected lower fusing of CO2+SF6, form alloy molten solution A;
3) when the temperature of alloy molten solution A is 700 DEG C, add the master alloy Mg-Sr after preheating and calcium oxide particle and be incubated 10min, after alloy all melts, removing surface scum, stopping after temperature being risen to 720 DEG C heating up, obtain alloy molten solution B;
4) by steel die preheating under 250 DEG C of conditions, treat that the temperature of alloy molten solution B is down to 680 DEG C, be cast in the mould after preheating, obtain cast alloy;
5) to step 4) gained cast alloy carries out solution treatment and ageing treatment successively, and solution treatment is carried out under magnesium oxide powder covers, and treatment temp is 415 DEG C, and the treatment time is 14h, and rear water-cooled is to room temperature; The temperature of crash handling is 250 DEG C, and the treatment time is 10h, and rear air cooling, to room temperature, obtains the heat resistance magnesium alloy that alloy compositions is Mg-8Al-0.5Zn-0.1Sr-1.5CaO.
Experimental example
This experimental example detects the tensile strength of embodiment 1-3 gained heat resistance magnesium alloy and unit elongation, test method is: be processed into 5 times of standard tensile specimen according to standard GB/T 6397-86 " metal stretching experimental sample ", Japanese Shimadzu AG-I250kN electronic tensile test machine stretches, and rate of extension is 1mm/min; When carrying out drawing by high temperature, 10 minutes are incubated, then stretch.Result is as shown in table 1.
The tensile strength of table 1 embodiment 1-3 gained heat resistance magnesium alloy and unit elongation detected result

Claims (10)

1. a heat resistance magnesium alloy, is characterized in that: be made up of the component of following mass percent: 3% ~ 8%Al, 0.5% ~ 1.5%Zn, 0.1 ~ 0.7%Sr, 0.3% ~ 1.5%CaO, and surplus is Mg and inevitable impurity.
2. a preparation method for heat resistance magnesium alloy as claimed in claim 1, is characterized in that: comprise the following steps:
1) by raw material magnesium, zinc, aluminium in the mixed gas protected lower fusing of CO2+SF6, form alloy molten solution A;
2) when the temperature of alloy molten solution A is 680 ~ 700 DEG C, add master alloy Mg-Sr and calcium oxide and be incubated 10min, after alloy all melts, removing surface scum, after being warming up to 720 DEG C, obtain alloy molten solution B;
3) treat that the temperature of alloy molten solution B is down to 680 DEG C, be cast in mould, obtain cast alloy;
4) to step 3) gained cast alloy heat-treats, and obtains described heat resistance magnesium alloy.
3. the preparation method of heat resistance magnesium alloy according to claim 2, is characterized in that: through thermal pretreatment before described raw material magnesium, zinc, aluminium, master alloy Mg-Sr and calcium oxide use.
4. the preparation method of heat resistance magnesium alloy according to claim 3, is characterized in that: the temperature of described preheating is 150 ~ 200 DEG C.
5. the preparation method of heat resistance magnesium alloy according to claim 2, is characterized in that: step 3) described in mould before casting through thermal pretreatment.
6. the preparation method of heat resistance magnesium alloy according to claim 5, is characterized in that: the temperature of described mould and die preheating process is 180 ~ 250 DEG C.
7. the preparation method of heat resistance magnesium alloy according to claim 2, is characterized in that: step 4) described in thermal treatment be that solution treatment and actual effect process are carried out successively to cast alloy.
8. the preparation method of heat resistance magnesium alloy according to claim 7, is characterized in that: the temperature of described solution treatment is 415 ~ 430 DEG C, and the treatment time is 10 ~ 14h.
9. the preparation method of heat resistance magnesium alloy according to claim 7, is characterized in that: the temperature of described ageing treatment is 200 ~ 250 DEG C, and the treatment time is 10 ~ 20h.
10. the preparation method of the heat resistance magnesium alloy according to claim 7,8 or 9, is characterized in that: described solution treatment carries out under magnesium oxide powder covers.
CN201410251362.8A 2014-06-06 2014-06-06 Heat-resistant magnesium alloy and preparation method thereof Pending CN104233026A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410251362.8A CN104233026A (en) 2014-06-06 2014-06-06 Heat-resistant magnesium alloy and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410251362.8A CN104233026A (en) 2014-06-06 2014-06-06 Heat-resistant magnesium alloy and preparation method thereof

Publications (1)

Publication Number Publication Date
CN104233026A true CN104233026A (en) 2014-12-24

Family

ID=52221913

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410251362.8A Pending CN104233026A (en) 2014-06-06 2014-06-06 Heat-resistant magnesium alloy and preparation method thereof

Country Status (1)

Country Link
CN (1) CN104233026A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104550865A (en) * 2015-01-16 2015-04-29 中国科学院青海盐湖研究所 Magnesium aluminum strontium alloy preparation method
CN105063448A (en) * 2015-09-18 2015-11-18 济南大学 Quasicrystal phase reinforced LPSO structured Mg-Zn-Y magnesium alloy and preparation method thereof
CN105112822A (en) * 2015-09-14 2015-12-02 苏州法斯特信息科技有限公司 Anti-corrosion magnesium-vanadium-strontium alloy material and preparation method thereof
CN106801176A (en) * 2017-04-12 2017-06-06 河南科技大学 A kind of anti-oxidant magnesium alloy and preparation method thereof
CN107447153A (en) * 2017-08-10 2017-12-08 江苏理工学院 A kind of high intensity AZ31 CaO magnesium alloys and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002327231A (en) * 2001-03-02 2002-11-15 Mitsubishi Alum Co Ltd Cast article of heat-resistant magnesium alloy, and manufacturing method therefor
CN1434143A (en) * 2001-08-24 2003-08-06 三菱铝株式会社 Mould casting magnesium alloy
CN101067178A (en) * 2007-06-13 2007-11-07 湖南大学 Alkaline-earth heat insulating magnesium alloy for vehicle use and producing method thereof
KR20090071898A (en) * 2007-12-28 2009-07-02 한국생산기술연구원 Alkaline-earth metals added magnesium and magnesium alloys and their manufacturing method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002327231A (en) * 2001-03-02 2002-11-15 Mitsubishi Alum Co Ltd Cast article of heat-resistant magnesium alloy, and manufacturing method therefor
CN1434143A (en) * 2001-08-24 2003-08-06 三菱铝株式会社 Mould casting magnesium alloy
CN101067178A (en) * 2007-06-13 2007-11-07 湖南大学 Alkaline-earth heat insulating magnesium alloy for vehicle use and producing method thereof
KR20090071898A (en) * 2007-12-28 2009-07-02 한국생산기술연구원 Alkaline-earth metals added magnesium and magnesium alloys and their manufacturing method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DONG BOK LEE: "High temperature oxidation of AZ31 + 0.3 wt.%Ca and AZ31 + 0.3 wt.%CaO magnesium alloys", 《CORROSION SCIENCE》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104550865A (en) * 2015-01-16 2015-04-29 中国科学院青海盐湖研究所 Magnesium aluminum strontium alloy preparation method
CN105112822A (en) * 2015-09-14 2015-12-02 苏州法斯特信息科技有限公司 Anti-corrosion magnesium-vanadium-strontium alloy material and preparation method thereof
CN105063448A (en) * 2015-09-18 2015-11-18 济南大学 Quasicrystal phase reinforced LPSO structured Mg-Zn-Y magnesium alloy and preparation method thereof
CN106801176A (en) * 2017-04-12 2017-06-06 河南科技大学 A kind of anti-oxidant magnesium alloy and preparation method thereof
CN107447153A (en) * 2017-08-10 2017-12-08 江苏理工学院 A kind of high intensity AZ31 CaO magnesium alloys and preparation method thereof

Similar Documents

Publication Publication Date Title
CN104233026A (en) Heat-resistant magnesium alloy and preparation method thereof
CN104694805A (en) Low-cost multi-component heat-resistant magnesium alloy and preparation method of magnesium alloy
CN101787472B (en) Heat-resistant forged magnesium-rare earth alloy and preparation method thereof
CN101463441A (en) Rare earth-containing high strength heat resisting magnesium alloy and preparation thereof
CN106834846B (en) A kind of multicomponent heat-resistant corrosion-resistant magnesium alloy and preparation method
CN101037753A (en) High-strength heat-proof compression casting magnesium alloy and preparation method thereof
CN102154580B (en) High-intensity heat-resistant magnesium alloy material and preparation process thereof
CN103146973B (en) High-temperature-resistant rare earth magnesium alloy
CN100424210C (en) Compression casting heat-stable magnesium alloy
CN105714168A (en) High-yield-strength magnesium alloy and preparation method thereof
CN104032195A (en) Efficiently-extrudable low-cost high-performance heat-conducting magnesium alloy and preparation method thereof
CN104674092A (en) Mg-Al-Zn heat-resistant magnesium alloy containing Sm and preparation method of alloy
CN102865354A (en) Automobile reduction gearbox casing and preparation process of casing
CN111254333B (en) Multi-element high-strength corrosion-resistant wrought magnesium alloy and preparation method thereof
CN101532105A (en) Rare-earth magnesium alloy and preparation method thereof
CN103757510B (en) A kind of multicomponent heat-resistant magnesium alloy
CN105039816B (en) A kind of high strength and low cost heat resistance magnesium alloy and preparation method thereof
CN103131925B (en) High-strength heat-resisting composite rare earth magnesium alloy
CN102330006B (en) Wrought magnesium alloy and preparation method thereof
CN102634711A (en) High-temperature high-toughness deformation magnesium alloy material and preparation method thereof
CN103469039B (en) The magnesium-aluminum-zinc wrought magnesium alloys of a kind of calcic and rare earth samarium
CN102094125B (en) Process method for preparing magnesium alloy through electro-slag remelting
CN102181763B (en) Rare earth magnesium alloy with stable high-temperature strength
CN103146972B (en) A kind of Multielement rare-earth magnesium alloy and preparation method thereof
CN103074531B (en) Heat resistant alloy of rare earth and magnesium and preparation method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20141224