CN102618763A - Heat resistant magnesium alloy - Google Patents
Heat resistant magnesium alloy Download PDFInfo
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- CN102618763A CN102618763A CN2012101077321A CN201210107732A CN102618763A CN 102618763 A CN102618763 A CN 102618763A CN 2012101077321 A CN2012101077321 A CN 2012101077321A CN 201210107732 A CN201210107732 A CN 201210107732A CN 102618763 A CN102618763 A CN 102618763A
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Abstract
The invention discloses a heat resistant magnesium alloy and belongs to the magnesium alloy field. The magnesium alloy is composed of Mg, Al, Zn, Mn, rare earths, Nb and Zr, and comprises, by weight, 1.5 to 25 percents of Al, 0.1 to 3.5 percents of Zn, 0.1 to 2.2 percents of Mn, 0.0002 to 16 percents of rear earths, 0.0002 to 4 percents of Nb, 0.001 to 2 percents of Zr, and the balance Mg. According to the magnesium alloy, the structure of Beta phase is changed by adding rare earth elements and the Nb element into the magnesium alloy; and grains are refined and the alloy liquid is purified by adding the Zr element, so that the heat resistant performance of the magnesium alloy is improved, and the heat resistant magnesium alloy which has good mechanical properties, machinability, mobility and die-casting properties and is suitable for casting in particular to die-casting is obtained.
Description
Technical field
The present invention relates to a kind of magnesiumalloy, particularly a kind of MgAlZn is applicable to the heat resistance magnesium alloy of casting especially die casting.
Background technology
Along with development of science and technology, be that the vehicles of representative need come the further higher product innovation of research and development fuel availability through alleviating the weight of vehicle body with the automobile.In automobile industry, magnesiumalloy is used for substituting traditional cast iron as a kind of novel lightweight metal material by automaker, to realize alleviating the purpose of tare.
At present, homemade MgAlZn is that the diecast magnesium alloy trade mark has YM302, YM303, YM304, YM305; The MgAlZn of USS ASTM B is that the diecast magnesium alloy trade mark has AZ91A, AZ91B, AZ91D; The MgAlZn of Nippon Standard JIS H is that the diecast magnesium alloy trade mark has MDC1B, MDC1D; The MgAlZn of European standard EN is that the diecast magnesium alloy trade mark has EN-MC21110, EN-MC21120, EN-MC21121.The alloy of these trades mark has all very good characteristics of flowability, machinability, castability; Be widely used in cast forms such as permanent mold casting, precision casting, low-pressure casting, die casting, semi-solid casting, sand mold casting; And owing to contain alloy element Zn; Therefore, tensile strength is also very good.In addition, the MgAlZn series magnesium alloy also is useful on the wrought magnesium alloys direction.
In realizing process of the present invention, the contriver finds that there is following problem at least in prior art: some parts on the automobile, as: gear box, mover case lid etc., working temperature is higher, and also exists light-weighted demand.But above-mentioned MgAlZn series magnesium alloy since alloy structure in β with Mg
17Al
12Be main, Mg
17Al
12Fusing point is lower, and all less than 90MPa, so the parts of its production are inappropriate under hot environment and work in the tensile strength under 200 ℃ of high temperature for non-refractory, above-mentioned MgAlZn series magnesium alloy, thereby can't satisfy the high temperature resistant demand of the above-mentioned parts of automobile.
Thereby, this area be badly in need of a kind of good mechanical performance, high temperature resistant, can be applicable to casting and magnesiumalloy that can rolling deformation.
Summary of the invention
In order to solve the problem that exists in the above-mentioned prior art, the embodiment of the invention provides a kind of heat resistance magnesium alloy with good die casting property.Said technical scheme is following:
A kind of heat resistance magnesium alloy; Said magnesiumalloy is made up of Mg, Al, Zn, Mn, rare earth, Nb and Zr; Its weight percent consists of Al 1.5%-25%, Zn 0.1%-3.5%, Mn 0.1%-2.2%, rare earth 0.0002%-16%, Nb 0.0002%-4%, Zr0.001%-2%, and all the other are Mg.
Wherein, said rare earth is at least a among Gd, Y, Sc, Sm, Nd, Pr, Yb, La, Ce, Tb, Dy, Ho and the Er.
Preferably, said rare earth is at least a among Gd or Gd and Y, Sc, Sm, Nd, Pr, Yb, La, Ce, Tb, Dy, Ho and the Er.
Preferably, its weight percent consists of Al 1.5%-2.5%, Zn 0.3%-1%, Mn 0.1%-0.6%, Gd 0.1%-4%, Nb0.05%-1%, Zr 0.2%-0.9%, and all the other are Mg.
Preferably, its weight percent consists of Al 4.5%-10%, Zn 0.3%-1%, Mn 0.1%-0.6%, Gd 0.1%-2%, Nb0.05%-1%, Zr 0.2%-0.9%, and all the other are Mg.
More preferably, its weight percent consists of Al 7%-9.7%, Zn 0.35%-1%, Mn 0.12%-0.6%, Gd 0.1%-0.8%, Nb 0.05%-0.6%, Zr 0.2%-0.9%, and all the other are Mg.
Most preferably, its weight percent consists of Al 8%, Zn 0.6%, Mn 0.3%, Gd 1%, Nb 0.5%, Zr 0.6%, and all the other are Mg.
Wherein, said Nb adds in the said magnesiumalloy through the form of AlNb master alloy or NbAl master alloy.
The beneficial effect that the technical scheme that the embodiment of the invention provides is brought is: in the diecast magnesium alloy provided by the invention; Because RE can form the MgRE compound with Mg; Nb can form some resistant to elevated temperatures metallic compounds with other elements (like Al); These metallic compounds are distributed on the crystal boundary, have substituted part Mg
17Al
12The β phase has changed the structure of β phase; Zr crystal grain thinning strongly in addition, can also with some impurity element (as: Fe, Si, Ni) reaction and the deposition in the alloy liquid, purified alloy liquid.Under the combined action of above-mentioned element, improved the resistance to elevated temperatures of magnesiumalloy, obtained a kind of good mechanical property that has, machinability, flowability and die casting property are good, and suitable casting is the heat resistance magnesium alloy of die casting especially.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, do to describe in detail further in the face of embodiment of the present invention down.
The manufacture craft of the magnesiumalloy that the embodiment of the invention provides, heat treating method are explained as follows:
1, the magnesiumalloy that provides of the embodiment of the invention can be made through following three kinds of melting technologies:
Technology one: the magnesiumalloy according to the embodiment of the invention provides is formed and the content alloyage; In resistance furnace, add magnesium ingot, aluminium ingot, zinc ingot metal, MgMn master alloy, AlNb master alloy or NbAl master alloy, MgZr master alloy or AlZr master alloy; Heat up for used resistance furnace, when the above-mentioned metal that adds melts soon, adopt gas shield or magnesium alloy covering agent protection.Add MgRE master alloy (like MgGd, MgY, MgNd etc.) or AlRE master alloy when being warmed up to 720 ℃-780 ℃, and stir, leave standstill insulation 30 minutes, get alloy liquid at 720 ℃-780 ℃.Water a fritter sample with gained alloy liquid, detect its melting quality, as: carry out the gas content inspection according to the gas content inspection method,, need carry out refining treatment if second-rate; If up-to-standard, the temperature adjustment to 700 of said alloy liquid is skimmed by ℃-740 ℃, to pour into a mould then, the foundry goods or the preparation that promptly obtain alloy of the present invention are used for rolling ingot bar.
Resistance furnace also can use other smelting furnaces to replace in this technology; Shielding gas can be an argon gas, also can be SF
6, can also be CO
2, or their mixed gas; Magnesium alloy covering agent and master alloy product are the market sale product; The refining treatment method adopts the ordinary method of the industry.
Technology two: the magnesiumalloy according to the embodiment of the invention provides is formed and the content alloyage; In vacuum oven, add aluminium ingot, zinc ingot metal, AlMn master alloy, AlNb master alloy or NbAl master alloy and MgZr master alloy; Be warming up to 820 ℃; Be incubated 2-8 hour, cool to 720 ℃-780 ℃ then, add magnesium ingot and RE.720 ℃-780 ℃ insulations 30 minutes, get alloy liquid behind the melting of metal of waiting to be added, adopt the protection of gas shield or magnesium alloy covering agent to prevent the alloy liquid oxidation.Water a fritter sample with gained alloy liquid, detect its melting quality, as: the inspection of gas content, if second-rate, need carry out refining treatment; If up-to-standard, the temperature adjustment to 700 of said alloy liquid is skimmed by ℃-740 ℃, to pour into a mould then, the foundry goods or the preparation that promptly obtain alloy of the present invention are used for rolling ingot bar.
Vacuum oven can substitute with other smelting furnaces such as main frequency furnaces in this technology; Shielding gas can be an argon gas, also can be SF
6, can also be CO
2, or their mixed gas; Magnesium alloy covering agent, RE and master alloy are sell goods on the market; The refining treatment method adopts the ordinary method of the industry.
Technology three: the magnesiumalloy according to the embodiment of the invention provides is formed and the content alloyage; In smelting furnace, adding standard brand MgAlZn is diecast magnesium alloy, AlNb master alloy or NbAl master alloy and MgZr master alloy, adopts gas shield or magnesium alloy covering agent protection when above-mentioned metal melts soon.Add MgRE master alloy (like MgGd, MgY, MgNd etc.) or AlRE master alloy when being warmed up to 720 ℃-780 ℃, and stir, leave standstill insulation 30 minutes, get alloy liquid at 720 ℃-780 ℃.Water a fritter sample with gained alloy liquid, detect its melting quality, as: carry out the gas content inspection according to the gas content inspection method,, need carry out refining treatment if second-rate; If up-to-standard, the temperature adjustment to 700 of said alloy liquid is skimmed by ℃-740 ℃, to pour into a mould then, the foundry goods or the preparation that promptly obtain alloy of the present invention are used for rolling ingot bar.
Shielding gas can be an argon gas in this technology, also can be SF
6, can also be CO
2, or their mixed gas; Magnesium alloy covering agent, RE and master alloy are sell goods on the market; The refining treatment method adopts the ordinary method of the industry.
2, the thermal treatment and the treatment process thereof of the magnesiumalloy that provides of the embodiment of the invention:
Die casting in the magnesiumalloy that the embodiment of the invention provides can not heat-treated, and the cast member of other form can be heat-treated, and generally adopts the T4 solution treatment.The T4 solid solution treatment process is: cast member is warming up to 400 ℃ in chamber type electric resistance furnace, is incubated 12 hours, shrend after cast member is come out of the stove, water temperature 20-80 ℃.
Receive fusion process to select the influence of some other inevitable factor in purity and the melting of raw material, the castingprocesses for use; The diecast magnesium alloy that the embodiment of the invention provides may contain unavoidable impurities; Like Fe, Cu, Be etc.; As long as said impurity does not cause obvious influence to the performance of magnesiumalloy; And total impurities is controlled at weight percent＜0.5% in the said magnesiumalloy finished product, in weight percent＜0.1% of single impurity in said magnesiumalloy finished product, exists trace impurity also to allow.
Embodiment 1
Prepare heat resistance magnesium alloy by above-mentioned technology one said step, foundry goods adopts die cast, and the weight percent of said magnesiumalloy consists of Al 25%, Zn 3.5%, Mn 2.2%, Y 16%, Nb 4%, Zr 2%, and all the other are Mg.
The thermal treatment of foundry goods (T4 solid solution treatment process): cast member is warming up to 400 ℃ in chamber type electric resistance furnace, is incubated 12 hours, shrend after cast member is come out of the stove, 80 ℃ of water temperatures.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 2
Prepare heat resistance magnesium alloy by above-mentioned technology two said steps, foundry goods adopts semi-solid casting, and the weight percent of said magnesiumalloy consists of Al 10%, Zn 1%, Mn 0.6%, Gd 2%, Nb 1%, Zr 0.9%, and all the other are Mg.
The thermal treatment of foundry goods (T4 solid solution treatment process): cast member is warming up to 400 ℃ in chamber type electric resistance furnace, is incubated 12 hours, shrend after cast member is come out of the stove, 80 ℃ of water temperatures.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 3
Prepare heat resistance magnesium alloy by above-mentioned technology one said step, foundry goods adopts Hpdc, and the weight percent of heat resistance magnesium alloy consists of Al 1.5%, Zn 0.1%, Mn 0.1%, Sm 0.0002%, Nb 0.0002%, Zr 0.001%, and all the other are Mg.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 4
Prepare heat resistance magnesium alloy by above-mentioned technology one said step, foundry goods adopts low-pressure casting, and the weight percent of said magnesiumalloy consists of Al 1.5%, Zn 0.3%, Mn 0.1%, Nd 0.1%, Nb 0.005%, Zr 0.2%, and all the other are Mg.
The thermal treatment of foundry goods (T4 solid solution treatment process): cast member is warming up to 400 ℃ in chamber type electric resistance furnace, is incubated 12 hours, shrend after cast member is come out of the stove, 50 ℃ of water temperatures.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 5
Prepare heat resistance magnesium alloy by above-mentioned technology two said steps, foundry goods adopts precision casting, and the weight percent of said magnesiumalloy consists of Al 2.5%, Zn 1%, Mn 0.6%, La 4%, Nb 1%, Zr 0.9%, and all the other are Mg.
The thermal treatment of foundry goods (T4 solid solution treatment process): cast member is warming up to 400 ℃ in chamber type electric resistance furnace, is incubated 12 hours, shrend after cast member is come out of the stove, 70 ℃ of water temperatures.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 6
Prepare heat resistance magnesium alloy by above-mentioned technology one said step, foundry goods adopts sand mold casting, and the weight percent of said magnesiumalloy consists of Al 2%, Zn 0.8%, Mn 0.5%, Gd 3%, Nb 0.8%, Zr 0.7%, and all the other are Mg.
The thermal treatment of foundry goods (T4 solid solution treatment process): cast member is warming up to 400 ℃ in chamber type electric resistance furnace, is incubated 12 hours, shrend after cast member is come out of the stove, 60 ℃ of water temperatures.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 7
Prepare heat resistance magnesium alloy by above-mentioned technology two said steps, foundry goods adopts Hpdc, and the weight percent of said magnesiumalloy consists of Al 6%, Zn 0.7%, Mn 0.2%, Pr2%, Nb 0.4%, Zr 0.5%, and all the other are Mg.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 8
Prepare heat resistance magnesium alloy by above-mentioned technology two said steps, foundry goods adopts Hpdc, and the weight percent of said magnesiumalloy consists of Al 9.8%, Zn 0.4%, Mn 0.4%, Yb 1.5%, Nb 0.7%, Zr 0.4%, and all the other are Mg.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 9
Prepare heat resistance magnesium alloy by above-mentioned technology two said steps, foundry goods adopts Hpdc, and the weight percent of said magnesiumalloy consists of Al 7%, Zn 0.35%, Mn 0.12%, Tb 0.1%, Nb 0.05%, Zr 0.2%, and all the other are Mg.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 10
Prepare heat resistance magnesium alloy by above-mentioned technology three said steps; Said standard brand diecast magnesium alloy is AZ9 1D; Foundry goods adopts Hpdc, and the weight percent of said magnesiumalloy consists of Al 9.7%, Zn 1%, Mn 0.5%, Dy 0.8%, Nb 0.6%, Zr 0.9%, and all the other are Mg.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 11
Prepare heat resistance magnesium alloy by above-mentioned technology one said step, foundry goods adopts Hpdc, and the weight percent of said magnesiumalloy consists of Al 4.5%, Zn 0.3%, Mn 0.1%, Ho 0.1%, Nb 0.05%, Zr 0.2%, and all the other are Mg.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 12
Prepare heat resistance magnesium alloy by above-mentioned technology two said steps, foundry goods adopts Hpdc, and the weight percent of said magnesiumalloy consists of Al 7.5%, Zn 0.9%, Mn 0.5%, Gd 0.2%, Nb 0.1%, Zr 0.8%, and all the other are Mg.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 13
Prepare heat resistance magnesium alloy by above-mentioned technology two said steps, foundry goods adopts Hpdc, and the weight percent of said magnesiumalloy consists of Al 7.5%, Zn 0.9%, Mn 0.5%, Gd 0.1%, Er 0.1%, Nb 0.1%, Zr 0.8%, and all the other are Mg.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 14
Prepare heat resistance magnesium alloy by above-mentioned technology two said steps, foundry goods adopts Hpdc, and the weight percent of said magnesiumalloy consists of Al 7.5%, Zn 0.9%, Mn 0.5%, Er 0.2%, Nb 0.1%, Zr 0.8%, and all the other are Mg.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
Embodiment 15
Prepare heat resistance magnesium alloy by above-mentioned technology one said step, foundry goods adopts Hpdc, and said magnesiumalloy weight percent consists of Al 8%, Zn 0.6%, Mn 0.3%, Gd 1%, Nb 0.5%, Zr 0.6%, and all the other are Mg.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
The comparative example
Prepare heat resistance magnesium alloy by above-mentioned technology one said step, foundry goods adopts Hpdc, and said magnesiumalloy weight percent consists of Al 8%, Zn 0.6%, Mn 0.3%, Gd 1%, Zr 0.6%, and all the other are Mg and unavoidable impurities.
The performance of the Mg alloy castings that present embodiment provides is referring to table 1.
More than the Mg alloy castings that provides of each embodiment can contain the impurity of trace, weight percent＜0.5% of said unavoidable impurities total amount in said magnesiumalloy finished product, weight percent＜0.1% of single impurity in said magnesiumalloy finished product.
Magnesiumalloy provided by the invention is applicable to forging types such as die cast, Hpdc, semi-solid casting, low-pressure casting, precision casting, sand mold casting.
The mechanical property of the Mg alloy castings that various embodiments of the present invention and comparative example provide is referring to table 1.
The mechanical property parameters table of the Mg alloy castings that each embodiment of table 1 provides
By shown in the table 1; The Mg alloy castings that the embodiment of the invention provides under 200 ℃ of high temperature tensile strength all greater than 180 MPa; Being higher than existing MgAlZn far away is diecast magnesium alloy, has good heat-resistant, simultaneously referring to embodiment 15 and comparative example; The Mg alloy castings that the embodiment of the invention provides is compared with the Mg alloy castings that does not add Nb, has better resistance toheat; The tensile strength of embodiment 12,15 under 200 ℃ of high temperature is better than other embodiment, and the scope of embodiment 12,15 each component is in Al 7%-9.7%, Zn 0.35%-1%, Mn 0.12%-0.6%, Gd 0.1%-0.8%, Nb 0.05%-0.6%, Zr 0.2%-0.9%; Through the contrast between the embodiment 12-14, can know that the RE that contains has the effect of Gd better; The Mg alloy castings that embodiment 15 provides tensile strength under 200 ℃ of high temperature is the highest, and the Mg alloy castings thermotolerance that embodiment 15 provides is the strongest.
The method of rolling alloy ingot bar of the present invention is pressed the pair rolling art breading and is got final product.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. heat resistance magnesium alloy; It is characterized in that; Said magnesiumalloy is made up of Mg, Al, Zn, Mn, rare earth, Nb and Zr; Its weight percent consists of Al 1.5%-25%, Zn 0.1%-3.5%, Mn 0.1%-2.2%, rare earth 0.0002-16%, Nb0.0002%-4%, Zr 0.001%-2%, and all the other are Mg.
2. magnesiumalloy according to claim 1 is characterized in that, said rare earth is at least a among Gd, Y, Sc, Sm, Nd, Pr, Yb, La, Ce, Tb, Dy, Ho and the Er.
3. magnesiumalloy according to claim 1 and 2 is characterized in that, said rare earth is at least a among Gd or Gd and Y, Sc, Sm, Nd, Pr, Yb, La, Ce, Tb, Dy, Ho and the Er.
4. according to each described magnesiumalloy of claim 1-3; It is characterized in that; Its weight percent consists of Al 1.5%-2.5%, Zn 0.3%-1%, Mn 0.1%-0.6%, Gd 0.1%-4%, Nb 0.05%-1%, Zr 0.2%-0.9%, and all the other are Mg.
5. according to each described magnesiumalloy of claim 1-3; It is characterized in that; Its weight percent consists of Al 4.5%-10%, Zn 0.3%-1%, Mn 0.1%-0.6%, Gd 0.1%-2%, Nb 0.05%-1%, Zr 0.2%-0.9%, and all the other are Mg.
6. magnesiumalloy according to claim 5 is characterized in that, its weight percent consists of Al 7%-9.7%, Zn0.35%-1%, Mn 0.12%-0.6%, Gd 0.1%-0.8%, Nb 0.05%-0.6%, Zr 0.2%-0.9%, and all the other are Mg.
7. magnesiumalloy according to claim 6 is characterized in that, its weight percent consists of Al 8%, Zn 0.6%, Mn 0.3%, Gd 1%, Nb 0.5%, Zr 0.6%, and all the other are Mg.
8. magnesiumalloy according to claim 1 is characterized in that, said Nb adds in the said magnesiumalloy through the form of AlNb master alloy or NbAl master alloy.
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| CN2012101077321A CN102618763A (en) | 2012-04-13 | 2012-04-13 | Heat resistant magnesium alloy |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103911534A (en) * | 2014-04-11 | 2014-07-09 | 芜湖职业技术学院 | Rare earth magnesium alloy and preparation method thereof |
| CN105483482A (en) * | 2015-11-27 | 2016-04-13 | 贵州航天风华精密设备有限公司 | Heat-resisting wear-resisting magnesium alloy and preparation method thereof |
| CN108588524A (en) * | 2018-07-23 | 2018-09-28 | 上海交通大学 | A kind of metal mold gravity casting magnesium alloy materials and preparation method thereof |
| CN109881067A (en) * | 2019-03-29 | 2019-06-14 | 上海交通大学 | High-toughness heat-resistant die casting Mg-Gd-Er alloy and preparation method thereof |
| CN109943758A (en) * | 2019-03-29 | 2019-06-28 | 凤阳爱尔思轻合金精密成型有限公司 | High-toughness heat-resistant die casting Mg-Er alloy and preparation method thereof |
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| CN101688270A (en) * | 2007-06-28 | 2010-03-31 | 住友电气工业株式会社 | Magnesium alloy plate |
| CN102230116A (en) * | 2011-06-23 | 2011-11-02 | 江汉大学 | High-hardness cast magnesium alloy |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101688270A (en) * | 2007-06-28 | 2010-03-31 | 住友电气工业株式会社 | Magnesium alloy plate |
| CN102230116A (en) * | 2011-06-23 | 2011-11-02 | 江汉大学 | High-hardness cast magnesium alloy |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103911534A (en) * | 2014-04-11 | 2014-07-09 | 芜湖职业技术学院 | Rare earth magnesium alloy and preparation method thereof |
| CN105483482A (en) * | 2015-11-27 | 2016-04-13 | 贵州航天风华精密设备有限公司 | Heat-resisting wear-resisting magnesium alloy and preparation method thereof |
| CN108588524A (en) * | 2018-07-23 | 2018-09-28 | 上海交通大学 | A kind of metal mold gravity casting magnesium alloy materials and preparation method thereof |
| CN108588524B (en) * | 2018-07-23 | 2020-09-15 | 上海交通大学 | Metal gravity casting magnesium alloy material and preparation method thereof |
| CN109881067A (en) * | 2019-03-29 | 2019-06-14 | 上海交通大学 | High-toughness heat-resistant die casting Mg-Gd-Er alloy and preparation method thereof |
| CN109943758A (en) * | 2019-03-29 | 2019-06-28 | 凤阳爱尔思轻合金精密成型有限公司 | High-toughness heat-resistant die casting Mg-Er alloy and preparation method thereof |
| CN109943758B (en) * | 2019-03-29 | 2021-09-17 | 凤阳爱尔思轻合金精密成型有限公司 | High-strength high-toughness heat-resistant die-casting Mg-Er alloy and preparation method thereof |
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Application publication date: 20120801 |