CN114855044A - Magnesium alloy and preparation method thereof - Google Patents
Magnesium alloy and preparation method thereof Download PDFInfo
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- CN114855044A CN114855044A CN202210575057.9A CN202210575057A CN114855044A CN 114855044 A CN114855044 A CN 114855044A CN 202210575057 A CN202210575057 A CN 202210575057A CN 114855044 A CN114855044 A CN 114855044A
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- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 150
- 238000002360 preparation method Methods 0.000 title claims abstract description 55
- 239000000956 alloy Substances 0.000 claims abstract description 86
- 239000011777 magnesium Substances 0.000 claims abstract description 85
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 80
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 27
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 25
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 24
- 230000032683 aging Effects 0.000 claims description 93
- 229910000748 Gd alloy Inorganic materials 0.000 claims description 91
- 239000000243 solution Substances 0.000 claims description 82
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 71
- 229910052749 magnesium Inorganic materials 0.000 claims description 71
- -1 magnesium samarium neodymium gadolinium Chemical compound 0.000 claims description 57
- KPQBNQRPQKZQNJ-UHFFFAOYSA-N [Sm].[Mg] Chemical compound [Sm].[Mg] KPQBNQRPQKZQNJ-UHFFFAOYSA-N 0.000 claims description 41
- PEFIIJCLFMFTEP-UHFFFAOYSA-N [Nd].[Mg] Chemical compound [Nd].[Mg] PEFIIJCLFMFTEP-UHFFFAOYSA-N 0.000 claims description 38
- DFIYZNMDLLCTMX-UHFFFAOYSA-N gadolinium magnesium Chemical compound [Mg].[Gd] DFIYZNMDLLCTMX-UHFFFAOYSA-N 0.000 claims description 38
- 229910000612 Sm alloy Inorganic materials 0.000 claims description 37
- 229910000583 Nd alloy Inorganic materials 0.000 claims description 35
- 239000002243 precursor Substances 0.000 claims description 32
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 25
- 238000005266 casting Methods 0.000 claims description 25
- 239000000155 melt Substances 0.000 claims description 24
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 22
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 claims description 20
- 239000006104 solid solution Substances 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 19
- 230000001681 protective effect Effects 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 28
- 150000002910 rare earth metals Chemical class 0.000 abstract description 8
- 238000005728 strengthening Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 230000005674 electromagnetic induction Effects 0.000 description 20
- 229910052751 metal Inorganic materials 0.000 description 20
- 239000002184 metal Substances 0.000 description 20
- 239000000203 mixture Substances 0.000 description 19
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 238000000465 moulding Methods 0.000 description 13
- KZUNJOHGWZRPMI-UHFFFAOYSA-N samarium atom Chemical compound [Sm] KZUNJOHGWZRPMI-UHFFFAOYSA-N 0.000 description 13
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 description 10
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 description 10
- 238000003723 Smelting Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000005275 alloying Methods 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- FAWGZAFXDJGWBB-UHFFFAOYSA-N antimony(3+) Chemical compound [Sb+3] FAWGZAFXDJGWBB-UHFFFAOYSA-N 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Forging (AREA)
Abstract
The invention relates to a magnesium alloy and a preparation method thereof, belonging to the technical field of magnesium alloys. The magnesium alloy comprises the following elements in percentage by mass: 4.0-4.4% of Sm, 1.8-2.2% of Nd, 1.2-1.6% of Gd, 0.6-0.8% of Sb, 0.3-0.5% of Al and the balance of Mg. The magnesium alloy adopts light rare earth elements Sm and Nd and heavy rare earth element Gd as rare earth components, wherein the content of Sm is 4.0-4.4 wt%, the content of Nd is 1.8-2.2%, the generation amount of strengthening phases containing Sm and Nd can be increased, and the strength of the alloy is improved; in order to ensure the strengthening effect and control the alloy cost, the content of Gd is controlled to be 1.2-1.6 wt%. Sb and Al can not only refine grains, but also generate a high-melting-point strengthening phase Mg 3 Sb 2 And a strengthening phase containing Al, so that the strength of the alloy is further improved.
Description
Technical Field
The invention relates to a magnesium alloy and a preparation method thereof, belonging to the technical field of magnesium alloys.
Background
The magnesium alloy has the advantages of low density, high specific strength-to-rigidity, excellent damping and vibration-damping performance, good electromagnetic shielding performance, easy recovery and the like, is the lightest metal structure material in the current engineering application, and has wide application prospect in aerospace, automobile manufacturing and electronic industry. Research in recent decades shows that the use of rare earth as alloying element can raise the mechanical performance of magnesium alloy at room temperature and high temperature obviously. For example, WE54 and WE43 alloys containing Y element and Nd element are developed in the UK, and WE54 alloy with high content of alloy elements has the room-temperature tensile strength of 280MPa and the elongation after fracture of 4 percent; ZM6 alloy containing rare earth is also developed in China and widely applied to engineering, the tensile strength of the alloy is 225MPa, and the elongation after fracture is 3%. With the increase of the speed and the acceleration of a new generation of aircrafts, higher requirements are put forward on the strength and the plasticity of a magnesium alloy material. Gd and Y are used as main alloy elements, Mg-Gd-Y series alloys with different components are developed at home and abroad successively, and the tensile strength of the alloys is greatly improved, however, the content of rare earth elements in the magnesium alloys is often higher than 10%, so that the cost of the magnesium alloys is too high, and the application of high-strength magnesium alloy materials in the engineering field is limited.
Disclosure of Invention
The invention aims to provide a magnesium alloy, which is used for solving the problem of overhigh cost caused by the fact that the content of rare earth elements in the conventional high-strength magnesium alloy is higher than 10 percent.
The invention also aims to provide a preparation method of the magnesium alloy.
In order to achieve the above purpose, the magnesium alloy of the present invention adopts the following technical scheme:
the magnesium alloy consists of the following elements in percentage by mass: 4.0-4.4% of Sm, 1.8-2.2% of Nd, 1.2-1.6% of Gd, 0.6-0.8% of Sb, 0.3-0.5% of Al and the balance of Mg.
The magnesium alloy of the inventionThe alloy component of the alloy is Mg-Sm-Nd-Gd-Sb-Al. Light rare earth elements Sm and Nd are respectively used as a first rare earth component and a second rare earth component, and a heavy rare earth element Gd is used as a third rare earth component, wherein the maximum solid solubility of Sm, Nd and Gd in magnesium is respectively 5.8 wt%, 3.6 wt% and 23.5 wt%. The content of Sm is 4.0-4.4 wt%, the content of Nd is 1.8-2.2%, the generation amount of Sm and Nd-containing strengthening phases can be increased, and the strength of the alloy can be improved; in order to ensure the strengthening effect and control the alloy cost, the content of Gd is controlled to be 1.2-1.6 wt%. The content of Sb is controlled to be 0.6-0.8 wt% and the content of Al is controlled to be 0.3-0.5 wt%, so that not only can grains be refined, but also a high-melting-point strengthening phase Mg can be generated 3 Sb 2 And a strengthening phase containing Al, so that the strength of the alloy is further improved. The invention utilizes the comprehensive action of multi-element alloying, and can effectively reduce the content of rare earth elements in the magnesium alloy while ensuring that the magnesium alloy has certain strength, thereby reducing the cost of the magnesium alloy.
Preferably, the percentage of Sm, Nd and Gd in the total mass of the magnesium alloy is less than 8%. In order to reduce the cost, the magnesium alloy adopts various rare earth elements with lower content. Compared with commercial heat-resistant high-strength magnesium alloy WE54 (the content of rare earth elements is 9 wt%), the rare earth magnesium alloy has the tensile strength higher than 300MPa at room temperature and the elongation after fracture not lower than 5% under the condition of lower content of rare earth elements.
Preferably, the mass fraction of Mg in the magnesium alloy is 91.3%.
Preferably, the magnesium alloy is produced by a method comprising the steps of: casting the precursor alloy melt of the magnesium alloy to obtain an ingot, and then sequentially carrying out solid solution treatment and aging treatment on the ingot.
It will be appreciated that the chemical composition in the precursor alloy melt of the magnesium alloy is the same as that of the magnesium alloy of the present invention.
Preferably, the solution treatment is a graded solution treatment; the grading solid solution treatment is to perform low-temperature solid solution treatment and then perform high-temperature solid solution treatment; the temperature of the low-temperature solution treatment is 460-480 ℃, and the time of the low-temperature solution treatment is 6-8 h; the temperature of the high-temperature solution treatment is 510-530 ℃, and the time of the high-temperature solution treatment is 6-8 h.
Preferably, the aging treatment is a graded aging treatment; the grading aging treatment comprises the steps of firstly carrying out low-temperature aging treatment and then carrying out high-temperature aging treatment; the temperature of the low-temperature aging treatment is 200-220 ℃, and the time of the low-temperature aging treatment is 10-12 h; the temperature of the high-temperature aging treatment is 230-250 ℃, and the time of the high-temperature aging treatment is 1-2 h.
Preferably, the precursor alloy melt is prepared by a method comprising the following steps: heating magnesium and magnesium samarium neodymium gadolinium alloy to 730-750 ℃ under a protective atmosphere to obtain a melt, and then adding antimony and aluminum into the melt to obtain a precursor alloy melt. Preferably, the protective atmosphere consists of CO 2 And SF 6 Composition of SF in said protective atmosphere 6 Is not more than 1% by volume. For example, in the preparation method of the precursor alloy melt, the protective atmosphere is formed by CO 2 And SF 6 Composition of CO 2 And SF 6 Is 99: 1. The Mg-Sm-Nd-Gd-Sb-A1 alloy is prepared on the basis of the magnesium-samarium-neodymium-gadolinium intermediate alloy, so that the loss of rare earth elements in the smelting process can be reduced, the utilization rate of the rare earth elements is improved, and the cost of magnesium alloy materials is further reduced.
Preferably, the melt is obtained by heating magnesium and magnesium samarium neodymium gadolinium alloy to 730-750 ℃ by using an electromagnetic induction furnace and smelting. The magnesium and magnesium samarium neodymium gadolinium alloy is heated to 730-750 ℃ through an electromagnetic induction furnace, so that all raw materials can be fully melted, and a melt can be uniformly mixed through the electromagnetic stirring effect.
Preferably, the mass ratio of samarium element, neodymium element and gadolinium element in the magnesium-samarium-neodymium-gadolinium alloy is (4.0-4.4): (1.8-2.2): 1.2-1.6). Preferably, the mass ratio of samarium element, antimony element in antimony and aluminum element in aluminum in the magnesium-samarium-neodymium-gadolinium alloy is (4.0-4.4): (0.6-0.8): 0.3-0.5).
Preferably, the mass ratio of the magnesium to the magnesium samarium neodymium gadolinium alloy adopted in the preparation method of the precursor alloy melt is (48-49.5): 50. For example, the mass ratio of magnesium to magnesium samarium neodymium gadolinium alloy adopted in the preparation method of the precursor alloy melt is (48.7-49.1): 50.
Preferably, the magnesium samarium neodymium gadolinium alloy is prepared by adopting a method comprising the following steps of: heating magnesium, a magnesium samarium alloy, a magnesium neodymium alloy and a magnesium gadolinium alloy to 730-750 ℃ under a protective atmosphere to obtain an alloy liquid, and then casting to obtain the magnesium samarium neodymium gadolinium alloy. In order to avoid introducing impurities, the raw materials are pure magnesium, pure antimony, pure aluminum, magnesium samarium alloy, magnesium neodymium alloy and magnesium gadolinium alloy. Because the melting points of pure samarium, pure neodymium and pure gadolinium are all over 1000 ℃, in order to reduce energy consumption and meet the requirements on equipment, magnesium-samarium alloy, magnesium-neodymium alloy and magnesium-gadolinium alloy with lower melting points are adopted. According to the invention, the Mg-Sm-Nd-Gd intermediate alloy is prepared firstly, and then the Mg-Sm-Nd-Gd-Sb-A1 alloy is prepared on the basis of the intermediate alloy, so that the loss of rare earth elements in the smelting process is reduced through a two-step method, the utilization rate of the rare earth elements is improved, and the cost of magnesium alloy materials is further reduced.
Preferably, the alloy liquid is obtained by heating magnesium, samarium magnesium alloy, neodymium magnesium alloy and gadolinium magnesium alloy to 730-750 ℃ by using an electromagnetic induction furnace and smelting. The magnesium, the magnesium samarium alloy, the magnesium neodymium alloy and the magnesium gadolinium alloy are heated to 730-750 ℃ through an electromagnetic induction furnace, so that the raw materials are fully melted, and the melt can be uniformly mixed through the electromagnetic stirring effect.
Preferably, the magnesium samarium neodymium gadolinium alloy is obtained by pouring alloy liquid into a metal mold at the temperature of 150-200 ℃ for casting and molding. Preferably, in the preparation method of the magnesium samarium neodymium gadolinium alloy, the metal mold is made of steel.
Preferably, the magnesium samarium alloy is Mg-25 Sm. Preferably, the magnesium neodymium alloy is Mg-25 Nd. Preferably, the magnesium-gadolinium alloy is Mg-25 Gd. Preferably, the mass ratio of the magnesium samarium alloy, the magnesium neodymium alloy and the magnesium gadolinium alloy is (32-36): 14-18): 9-13. For example, the mass ratio of the magnesium samarium alloy, the magnesium neodymium alloy and the magnesium gadolinium alloy is (32-35.2): (14.4-17.6): (9.6-12.8). Preferably, the mass ratio of the magnesium to the samarium-magnesium alloy adopted in the preparation method of the samarium-magnesium-neodymium-gadolinium alloy is (37-41) to (32-36). For example, the mass ratio of magnesium to the magnesium-samarium-neodymium-gadolinium alloy adopted in the preparation method of the magnesium-samarium-neodymium-gadolinium alloy is (37.6-40.8): 32-35.2.
The preparation method of the magnesium alloy adopts the technical scheme that:
a preparation method of a magnesium alloy comprises the following steps: casting a precursor alloy melt of the magnesium alloy to obtain an ingot, and then sequentially carrying out solid solution treatment and aging treatment on the ingot; the magnesium alloy consists of the following elements in percentage by mass: 4.0-4.4% of Sm, 1.8-2.2% of Nd, 1.2-1.6% of Gd, 0.6-0.8% of Sb, 0.3-0.5% of Al and the balance of Mg.
According to the preparation method of the magnesium alloy, firstly, the precursor alloy melt of the magnesium alloy is cast to obtain a casting, and then the casting is sequentially subjected to solid solution treatment and aging treatment, so that the structure of the magnesium alloy can be further improved and the mechanical property of the magnesium alloy can be improved.
It will be appreciated that the chemical composition in the precursor alloy melt of the magnesium alloy is the same as that of the magnesium alloy of the present invention.
Preferably, in the preparation method of the magnesium alloy, the percentage of Sm, Nd and Gd in the total mass of the magnesium alloy is less than 8%.
Preferably, in the preparation method of the magnesium alloy, the ingot is obtained by pouring a precursor alloy melt of the magnesium alloy into a metal mold at 150-200 ℃ for casting and molding. Preferably, in the preparation method of the magnesium alloy, the metal mold is made of steel.
Preferably, in the preparation method of the magnesium alloy, the precursor alloy melt is prepared by adopting a method comprising the following steps: heating magnesium and magnesium samarium neodymium gadolinium alloy to 730-750 ℃ under a protective atmosphere to obtain a melt, and then adding antimony and aluminum into the melt to obtain a precursor alloy melt. Preferably, in the preparation method of the magnesium alloy, the protective atmosphere is formed by CO 2 And SF 6 Composition of SF in said protective atmosphere 6 Is not more than 1% by volume. For example, in the preparation method of magnesium alloy, in the preparation method of precursor alloy melt, the protective atmosphere is formed by CO 2 And SF 6 Composition of CO 2 And SF 6 Is 99: 1. The invention relates to a magnesium samarium neodymium gadolinium intermediate alloyThe Mg-Sm-Nd-Gd-Sb-A1 alloy prepared on the basis can reduce the loss of rare earth elements in the smelting process, improve the utilization rate of the rare earth elements and further reduce the cost of magnesium alloy materials.
Preferably, in the preparation method of the magnesium alloy, the melt is obtained by heating magnesium and magnesium samarium neodymium gadolinium alloy to 730-750 ℃ by using an electromagnetic induction furnace and smelting. The magnesium and magnesium samarium neodymium gadolinium alloy is heated to 730-750 ℃ through an electromagnetic induction furnace, so that all raw materials can be fully melted, and a melt can be uniformly mixed through the electromagnetic stirring effect.
Preferably, in the preparation method of the magnesium alloy, the mass ratio of samarium element, neodymium element and gadolinium element in the magnesium samarium neodymium gadolinium alloy is (4.0-4.4): (1.8-2.2): 1.2-1.6). Preferably, in the preparation method of the magnesium alloy, the mass ratio of samarium element, antimony element in antimony and aluminum element in aluminum in the magnesium samarium-neodymium gadolinium alloy is (4.0-4.4): (0.6-0.8): 0.3-0.5.
Preferably, in the preparation method of the magnesium alloy, the mass ratio of magnesium and the magnesium samarium neodymium gadolinium alloy adopted in the preparation method of the precursor alloy melt is (48-49.5): 50. For example, in the preparation method of the magnesium alloy, the mass ratio of magnesium and the magnesium samarium neodymium gadolinium alloy adopted in the preparation method of the precursor alloy melt is (48.7-49.1): 50.
Preferably, in the preparation method of the magnesium alloy, the magnesium samarium neodymium gadolinium alloy is prepared by adopting a method comprising the following steps: heating magnesium, magnesium samarium alloy, magnesium neodymium alloy and magnesium gadolinium alloy to 730-750 ℃ under a protective atmosphere to obtain alloy liquid, and then casting to obtain the magnesium samarium neodymium gadolinium alloy. In order to avoid introducing impurities, the raw materials are pure magnesium, pure antimony, pure aluminum, magnesium samarium alloy, magnesium neodymium alloy and magnesium gadolinium alloy. Because the melting points of pure samarium, pure neodymium and pure gadolinium are all over 1000 ℃, in order to reduce energy consumption and meet the requirements on equipment, magnesium-samarium alloy, magnesium-neodymium alloy and magnesium-gadolinium alloy with lower melting points are adopted. According to the invention, the Mg-Sm-Nd-Gd intermediate alloy is prepared firstly, and then the Mg-Sm-Nd-Gd-Sb-A1 alloy is prepared on the basis of the intermediate alloy, so that the loss of rare earth elements in the smelting process is reduced through a two-step method, the utilization rate of the rare earth elements is improved, and the cost of magnesium alloy materials is further reduced.
Preferably, in the preparation method of the magnesium alloy, the alloy liquid is obtained by heating magnesium, a magnesium samarium alloy, a magnesium neodymium alloy and a magnesium gadolinium alloy to 730-750 ℃ by using an electromagnetic induction furnace for smelting. The magnesium, the magnesium samarium alloy, the magnesium neodymium alloy and the magnesium gadolinium alloy are heated to 730-750 ℃ through an electromagnetic induction furnace, so that the raw materials are fully melted, and the melt can be uniformly mixed through the electromagnetic stirring effect.
Preferably, in the preparation method of the magnesium alloy, the magnesium samarium neodymium gadolinium alloy is obtained by pouring the alloy liquid into a metal mold at 150-200 ℃ for casting and molding. Preferably, in the preparation method of the magnesium samarium neodymium gadolinium alloy, the metal mold is made of steel.
Preferably, in the preparation method of the magnesium alloy, the magnesium samarium alloy is Mg-25 Sm. Preferably, in the preparation method of the magnesium alloy, the magnesium neodymium alloy is Mg-25 Nd. Preferably, in the preparation method of the magnesium alloy, the magnesium-gadolinium alloy is Mg-25 Gd. Preferably, in the preparation method of the magnesium alloy, the mass ratio of the magnesium samarium alloy, the magnesium neodymium alloy and the magnesium gadolinium alloy is (32-36): (14-18): (9-13). For example, in the preparation method of the magnesium alloy, the mass ratio of the magnesium samarium alloy, the magnesium neodymium alloy and the magnesium gadolinium alloy is (32-35.2): (14.4-17.6): (9.6-12.8). Preferably, in the preparation method of the magnesium alloy, the mass ratio of magnesium to the magnesium-samarium alloy adopted in the preparation method of the magnesium-samarium-neodymium-gadolinium alloy is (37-41) to (32-36). For example, in the preparation method of the magnesium alloy, the mass ratio of magnesium to the magnesium-samarium alloy used in the preparation method of the magnesium-samarium-neodymium-gadolinium alloy is (37.6-40.8): (32-35.2).
In order to maximize the solid solution of the alloying elements in the magnesium matrix, the solid solution treatment is preferably a graded solid solution treatment.
Preferably, in the method for preparing the magnesium alloy, the graded solution treatment is performed by performing low-temperature solution treatment and then performing high-temperature solution treatment.
Preferably, in the preparation method of the magnesium alloy, the temperature of the low-temperature solution treatment is 460-480 ℃, and the time of the low-temperature solution treatment is 6-8 hours.
Preferably, in the preparation method of the magnesium alloy, the temperature of the high-temperature solution treatment is 510-530 ℃, and the time of the high-temperature solution treatment is 6-8 h.
In order to further improve the strength of the magnesium alloy, preferably, in the preparation method of the magnesium alloy, the aging treatment is a graded aging treatment.
Preferably, in the preparation method of the magnesium alloy, the step aging treatment is to perform low-temperature aging treatment and then perform high-temperature aging treatment.
Preferably, in the preparation method of the magnesium alloy, the temperature of the low-temperature aging treatment is 200-220 ℃, and the time of the low-temperature aging treatment is 10-12 hours.
Preferably, in the preparation method of the magnesium alloy, the temperature of the high-temperature aging treatment is 230-250 ℃, and the time of the high-temperature aging treatment is 1-2 h.
Detailed Description
The technical solution of the present invention is further described below with reference to specific examples.
The purity of magnesium and aluminum used in examples 1 to 6 and comparative examples of the present invention was 99.8%, the purity of antimony was 99.5%, the purity of samarium-magnesium alloy, neodymium-magnesium alloy and gadolinium-magnesium alloy was 99.8%, samarium-magnesium alloy was Mg-25Sm, neodymium-magnesium alloy was Mg-25Nd and gadolinium-magnesium alloy was Mg-25 Gd.
The magnesium alloy of the invention has the following specific embodiments:
example 1
The magnesium alloy of the embodiment comprises the following elements in percentage by mass: sm 4.0%, Nd 1.8%, Gd 1.6%, Sb0.8%, Al 0.5%, and the balance of Mg.
In the magnesium alloy of the present example, Sm, Nd, and Gd accounted for 7.4% of the total mass of the magnesium alloy.
The magnesium alloy of the present embodiment is produced by a method comprising the steps of:
(1) adding magnesium, magnesium samarium alloy, magnesium neodymium alloy and magnesium gadolinium alloy into an electromagnetic induction furnace, and keeping the atmosphere (by using CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 730 ℃ and is kept warm to obtain alloy liquid, and then the alloy liquid is poured into a steel metal mould with 150 ℃ for casting and molding to obtain magnesium, samarium and neodymiumAnd (5) carrying out gadolinium alloy ingot casting. The mass ratio of magnesium to the magnesium-samarium alloy to the magnesium-neodymium alloy to the magnesium-gadolinium alloy is 40.8:32:14.4:12.8, namely the mass ratio of magnesium element in magnesium to samarium element in the magnesium-samarium alloy to neodymium element in the magnesium-neodymium alloy to gadolinium element in the magnesium-gadolinium alloy is 40.8:8:3.6: 3.2.
(2) Adding magnesium and magnesium samarium neodymium gadolinium alloy cast ingots into an electromagnetic induction furnace, and keeping the cast ingots in a protective atmosphere (composed of CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 730 ℃ until the magnesium and magnesium samarium neodymium gadolinium alloy cast ingot is melted to obtain a melt, then antimony and aluminum are added into the melt to obtain a precursor alloy melt, and the precursor alloy melt is poured into a steel metal mold at 150 ℃ for casting molding to obtain the cast ingot (magnesium alloy cast ingot). The mass ratio of the magnesium to the magnesium samarium neodymium gadolinium alloy to the antimony to the aluminum is 48.7:50:0.8: 0.5.
(3) Carrying out graded solution treatment on the cast ingot, wherein the graded solution treatment comprises low-temperature solution treatment and high-temperature solution treatment, the temperature of the low-temperature solution treatment is 460 ℃, and the time of the low-temperature solution treatment is 8 hours; the temperature of the high-temperature solution treatment is 510 ℃, and the time of the high-temperature solution treatment is 8 h.
(4) And finally, carrying out graded aging treatment on the ingot after graded solution treatment to obtain the magnesium alloy. The step aging treatment comprises low temperature aging treatment and high temperature aging treatment, wherein the temperature of the low temperature aging treatment is 200 ℃, and the time of the low temperature aging treatment is 12 hours; the temperature of the high-temperature aging treatment is 230 ℃, and the time of the high-temperature aging treatment is 2 h.
Example 2
The magnesium alloy of the embodiment comprises the following elements in percentage by mass: sm 4.2%, Nd 2.0%, Gd 1.4%, Sb0.7%, Al 0.4%, and the balance of Mg.
In the magnesium alloy of the present example, Sm, Nd, and Gd accounted for 7.6% of the total mass of the magnesium alloy.
The magnesium alloy of the present embodiment is produced by a method comprising the steps of:
(1) adding magnesium, magnesium samarium alloy, magnesium neodymium alloy and magnesium gadolinium alloy into an electromagnetic induction furnace, and keeping the atmosphere (by using CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 740 ℃ and kept warm to obtain alloy liquid, and then the alloy liquid is mixedPouring the molten gold into a steel metal mold at 180 ℃ for casting and molding to obtain the magnesium samarium neodymium gadolinium alloy cast ingot. The mass ratio of magnesium to the magnesium-samarium alloy to the magnesium-neodymium alloy to the magnesium-gadolinium alloy is 39.2:33.6:16:11.2, namely the mass ratio of magnesium element in magnesium to samarium element in the magnesium-samarium alloy to neodymium element in the magnesium-neodymium alloy to gadolinium element in the magnesium-gadolinium alloy is 39.2:8.4:4: 2.8.
(2) Adding magnesium and magnesium samarium neodymium gadolinium alloy cast ingots into an electromagnetic induction furnace, and keeping the cast ingots in a protective atmosphere (composed of CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 740 ℃ until the magnesium and magnesium samarium neodymium gadolinium alloy cast ingot is melted to obtain a melt, then antimony and aluminum are added into the melt to obtain a precursor alloy melt, and the precursor alloy melt is poured into a steel metal mold at 180 ℃ for casting molding to obtain the cast ingot (magnesium alloy cast ingot). The mass ratio of the magnesium to the magnesium samarium neodymium gadolinium alloy to the antimony to the aluminum is 48.9:50:0.7: 0.4.
(3) Carrying out graded solution treatment on the cast ingot, wherein the graded solution treatment comprises low-temperature solution treatment and high-temperature solution treatment, the temperature of the low-temperature solution treatment is 470 ℃, and the time of the low-temperature solution treatment is 7 hours; the temperature of the high-temperature solution treatment is 520 ℃, and the time of the high-temperature solution treatment is 7 h.
(4) And finally, carrying out graded aging treatment on the ingot after graded solution treatment to obtain the magnesium alloy. The grading aging treatment comprises low-temperature aging treatment and high-temperature aging treatment, wherein the temperature of the low-temperature aging treatment is 210 ℃, and the time of the low-temperature aging treatment is 11 hours; the temperature of the high-temperature aging treatment is 240 ℃, and the time of the high-temperature aging treatment is 1.5 h.
Example 3
The magnesium alloy of the embodiment comprises the following elements in percentage by mass: sm 4.4%, Nd 2.2%, Gd 1.2%, Sb0.6%, Al 0.3%, and the balance of Mg.
In the magnesium alloy of the present example, Sm, Nd, and Gd accounted for 7.8% of the total mass of the magnesium alloy.
The magnesium alloy of the present embodiment is produced by a method comprising the steps of:
(1) adding magnesium, magnesium samarium alloy, magnesium neodymium alloy and magnesium gadolinium alloy into an electromagnetic induction furnace, and keeping the atmosphere (by using CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 750 ℃ and is kept warm, so as to obtain alloy liquid, and then the alloy liquid is poured into a steel metal mould at 200 ℃ for casting and molding, so as to obtain the magnesium samarium neodymium gadolinium alloy cast ingot. The mass ratio of magnesium to the magnesium-samarium alloy to the magnesium-neodymium alloy to the magnesium-gadolinium alloy is 37.6:35.2:17.6:9.6, namely the mass ratio of magnesium element in magnesium to samarium element in the magnesium-samarium alloy to neodymium element in the magnesium-neodymium alloy to gadolinium element in the magnesium-gadolinium alloy is 37.6:8.8:4.4: 2.4.
(2) Adding magnesium and magnesium samarium neodymium gadolinium alloy cast ingots into an electromagnetic induction furnace, and keeping the cast ingots in a protective atmosphere (composed of CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 750 ℃ until the magnesium and magnesium samarium neodymium gadolinium alloy cast ingot is melted to obtain a melt, then antimony and aluminum are added into the melt to obtain a precursor alloy melt, and the precursor alloy melt is poured into a steel metal mold at 200 ℃ for casting molding to obtain the cast ingot (magnesium alloy cast ingot). The mass ratio of the magnesium to the magnesium samarium neodymium gadolinium alloy to the antimony to the aluminum is 49.1:50:0.6: 0.3.
(3) Carrying out graded solution treatment on the cast ingot, wherein the graded solution treatment comprises low-temperature solution treatment and high-temperature solution treatment, the temperature of the low-temperature solution treatment is 480 ℃, and the time of the low-temperature solution treatment is 6 hours; the temperature of the high-temperature solution treatment is 530 ℃, and the time of the high-temperature solution treatment is 6 h.
(4) And finally, carrying out graded aging treatment on the ingot after graded solution treatment to obtain the magnesium alloy. The step aging treatment comprises low-temperature aging treatment and high-temperature aging treatment, wherein the temperature of the low-temperature aging treatment is 220 ℃, and the time of the low-temperature aging treatment is 10 hours; the temperature of the high-temperature aging treatment is 250 ℃, and the time of the high-temperature aging treatment is 1 h.
Comparative example
The elemental composition and the mass percentage of each element of the magnesium alloy of the present comparative example were the same as those of the magnesium alloy of example 3, and the magnesium alloy of the present comparative example was prepared by a method comprising the steps of:
(1) this step is the same as step (1) in the preparation method of the magnesium alloy of example 3.
(2) This step is the same as step (2) in the preparation method of the magnesium alloy of example 3.
(3) And carrying out solid solution treatment on the cast ingot, wherein the temperature of the solid solution treatment is 530 ℃, and the time of the solid solution treatment is 6 h.
(4) And finally, carrying out aging treatment on the cast ingot subjected to the solution treatment to obtain the magnesium alloy. The temperature of the aging treatment is 220 ℃, and the time of the high-temperature aging treatment is 10 h.
Secondly, the specific embodiment of the preparation method of the magnesium alloy of the invention is as follows:
example 4
The preparation method of the magnesium alloy of the embodiment specifically comprises the following steps:
(1) adding magnesium, magnesium samarium alloy, magnesium neodymium alloy and magnesium gadolinium alloy into an electromagnetic induction furnace, and keeping the atmosphere (by using CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 730 ℃ and is kept warm to obtain alloy liquid, and then the alloy liquid is poured into a steel metal mould at 150 ℃ for casting and molding to obtain the magnesium samarium neodymium gadolinium alloy cast ingot. The mass ratio of magnesium to the magnesium-samarium alloy to the magnesium-neodymium alloy to the magnesium-gadolinium alloy is 40.8:32:14.4:12.8, namely the mass ratio of magnesium element in magnesium to samarium element in the magnesium-samarium alloy to neodymium element in the magnesium-neodymium alloy to gadolinium element in the magnesium-gadolinium alloy is 40.8:8:3.6: 3.2.
(2) Adding magnesium and magnesium samarium neodymium gadolinium alloy cast ingots into an electromagnetic induction furnace, and keeping the cast ingots in a protective atmosphere (composed of CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 730 ℃ until the magnesium and magnesium samarium neodymium gadolinium alloy cast ingot is melted to obtain a melt, then antimony and aluminum are added into the melt to obtain a precursor alloy melt, and the precursor alloy melt is poured into a steel metal mold at 150 ℃ for casting molding to obtain the cast ingot (magnesium alloy cast ingot). The mass ratio of the magnesium to the magnesium samarium neodymium gadolinium alloy to the antimony to the aluminum is 48.7:50:0.8: 0.5.
(3) Carrying out graded solution treatment on the cast ingot, wherein the graded solution treatment comprises low-temperature solution treatment and high-temperature solution treatment, the temperature of the low-temperature solution treatment is 460 ℃, and the time of the low-temperature solution treatment is 8 hours; the temperature of the high-temperature solution treatment is 510 ℃, and the time of the high-temperature solution treatment is 8 h.
(4) And finally, carrying out graded aging treatment on the ingot after graded solution treatment to obtain the magnesium alloy. The step aging treatment comprises low temperature aging treatment and high temperature aging treatment, wherein the temperature of the low temperature aging treatment is 200 ℃, and the time of the low temperature aging treatment is 12 hours; the temperature of the high-temperature aging treatment is 230 ℃, and the time of the high-temperature aging treatment is 2 h.
The magnesium alloy obtained in the embodiment comprises the following elements in percentage by mass: sm 4.0%, Nd 1.8%, Gd 1.6%, Sb 0.8%, Al 0.5%, and the balance of Mg.
Example 5
The preparation method of the magnesium alloy of the embodiment specifically comprises the following steps:
(1) adding magnesium, magnesium samarium alloy, magnesium neodymium alloy and magnesium gadolinium alloy into an electromagnetic induction furnace, and keeping the atmosphere (by using CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 740 ℃ and is kept warm to obtain alloy liquid, and then the alloy liquid is poured into a steel metal mould at 180 ℃ for casting forming to obtain the magnesium samarium neodymium gadolinium alloy cast ingot. The mass ratio of magnesium to the magnesium-samarium alloy to the magnesium-neodymium alloy to the magnesium-gadolinium alloy is 39.2:33.6:16:11.2, namely the mass ratio of magnesium element in magnesium to samarium element in the magnesium-samarium alloy to neodymium element in the magnesium-neodymium alloy to gadolinium element in the magnesium-gadolinium alloy is 39.2:8.4:4: 2.8.
(2) Adding magnesium and magnesium samarium neodymium gadolinium alloy cast ingots into an electromagnetic induction furnace, and keeping the cast ingots in a protective atmosphere (composed of CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 740 ℃ until the magnesium and magnesium samarium neodymium gadolinium alloy cast ingot is melted to obtain a melt, then antimony and aluminum are added into the melt to obtain a precursor alloy melt, and the precursor alloy melt is poured into a steel metal mold at 180 ℃ for casting molding to obtain the cast ingot (magnesium alloy cast ingot). The mass ratio of the magnesium to the magnesium samarium neodymium gadolinium alloy to the antimony to the aluminum is 48.9:50:0.7: 0.4.
(3) Carrying out graded solution treatment on the cast ingot, wherein the graded solution treatment comprises low-temperature solution treatment and high-temperature solution treatment, the temperature of the low-temperature solution treatment is 470 ℃, and the time of the low-temperature solution treatment is 7 h; the temperature of the high-temperature solution treatment is 520 ℃, and the time of the high-temperature solution treatment is 7 h.
(4) And finally, carrying out graded aging treatment on the ingot after graded solution treatment to obtain the magnesium alloy. The grading aging treatment comprises low-temperature aging treatment and high-temperature aging treatment, wherein the temperature of the low-temperature aging treatment is 210 ℃, and the time of the low-temperature aging treatment is 11 hours; the temperature of the high-temperature aging treatment is 240 ℃, and the time of the high-temperature aging treatment is 1.5 h.
The magnesium alloy obtained in the embodiment comprises the following elements in percentage by mass: sm 4.2%, Nd 2.0%, Gd 1.4%, Sb 0.7%, Al 0.4%, and the balance of Mg.
Example 6
The preparation method of the magnesium alloy of the embodiment specifically comprises the following steps:
(1) adding magnesium, magnesium samarium alloy, magnesium neodymium alloy and magnesium gadolinium alloy into an electromagnetic induction furnace, and keeping the atmosphere (by using CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 750 ℃ and is kept warm to obtain alloy liquid, and then the alloy liquid is poured into a steel metal mould at 200 ℃ for casting forming to obtain the magnesium samarium neodymium gadolinium alloy cast ingot. The mass ratio of magnesium to the magnesium-samarium alloy to the magnesium-neodymium alloy to the magnesium-gadolinium alloy is 37.6:35.2:17.6:9.6, namely the mass ratio of magnesium element in magnesium to samarium element in the magnesium-samarium alloy to neodymium element in the magnesium-neodymium alloy to gadolinium element in the magnesium-gadolinium alloy is 37.6:8.8:4.4: 2.4.
(2) Adding magnesium and magnesium samarium neodymium gadolinium alloy cast ingots into an electromagnetic induction furnace, and keeping the cast ingots in a protective atmosphere (composed of CO with the volume ratio of 99: 1) 2 And SF 6 Composition) is heated to 750 ℃ until the magnesium and magnesium samarium neodymium gadolinium alloy cast ingot is melted to obtain a melt, then antimony and aluminum are added into the melt to obtain a precursor alloy melt, and the precursor alloy melt is poured into a steel metal mold at 200 ℃ for casting molding to obtain the cast ingot (magnesium alloy cast ingot). The mass ratio of the magnesium to the magnesium samarium neodymium gadolinium alloy to the antimony to the aluminum is 49.1:50:0.6: 0.3.
(3) Carrying out graded solution treatment on the cast ingot, wherein the graded solution treatment comprises low-temperature solution treatment and high-temperature solution treatment, the temperature of the low-temperature solution treatment is 480 ℃, and the time of the low-temperature solution treatment is 6 h; the temperature of the high-temperature solution treatment is 530 ℃, and the time of the high-temperature solution treatment is 6 h.
(4) And finally, carrying out graded aging treatment on the ingot after graded solution treatment to obtain the magnesium alloy. The step aging treatment comprises low-temperature aging treatment and high-temperature aging treatment, wherein the temperature of the low-temperature aging treatment is 220 ℃, and the time of the low-temperature aging treatment is 10 hours; the temperature of the high-temperature aging treatment is 250 ℃, and the time of the high-temperature aging treatment is 1 h.
The magnesium alloy obtained in the embodiment comprises the following elements in percentage by mass: sm 4.4%, Nd 2.2%, Gd 1.2%, Sb 0.6%, Al 0.3%, and the balance of Mg.
Examples of the experiments
The magnesium alloys of examples 1 to 3 and comparative example were subjected to a tensile test, and a commercial heat-resistant high-strength magnesium alloy WE54(Mg-5Y-4RE-0.5Zr) was used for comparison. The specific test method comprises the following steps: the alloy is processed into a standard tensile sample according to the requirements of national standard GB6397-86 metal tensile test sample, and then a tensile test is carried out by adopting an Shimadzu AG-I250 kN electronic tensile tester under the room temperature condition, wherein the tensile rate is 1 mm/min. The results of the experiment are shown in table 1.
TABLE 1 tensile Strength and elongation after Break of the magnesium alloys of examples 1-3 and comparative examples at Room temperature
| Magnesium alloy | Content of rare earth element (%) | Tensile strength (MPa) | Elongation (%) |
| Example 1 | 7.4 | 305 | 5.8 |
| Example 2 | 7.6 | 312 | 5.4 |
| Example 3 | 7.8 | 318 | 5.2 |
| Comparative example | 7.8 | 277 | 3.6 |
| WE54 | 9 | 280 | 4 |
As can be seen from table 1, the rare earth magnesium alloy of the present invention has excellent tensile strength at room temperature. Compared with WE54 alloy, the magnesium alloy of the invention has lower content of rare earth elements, higher tensile strength and elongation. Therefore, the magnesium alloy of the invention is superior to WE54 alloy in the aspects of alloy raw material cost and room temperature strength performance; in addition, the magnesium alloys of examples 1 to 3 have higher tensile strength and elongation than those of the comparative examples, which shows that the graded solution treatment and the graded aging treatment contribute to the improvement of mechanical properties of the magnesium alloys.
Claims (10)
1. The magnesium alloy is characterized by comprising the following elements in percentage by mass: 4.0-4.4% of Sm, 1.8-2.2% of Nd, 1.2-1.6% of Gd, 0.6-0.8% of Sb, 0.3-0.5% of Al and the balance of Mg.
2. The magnesium alloy according to claim 1, wherein the Sm, Nd and Gd are less than 8% of the total mass of the magnesium alloy.
3. The magnesium alloy according to claim 1 or 2, wherein the magnesium alloy is produced by a method comprising the steps of: casting the precursor alloy melt of the magnesium alloy to obtain an ingot, and then sequentially carrying out solid solution treatment and aging treatment on the ingot.
4. The magnesium alloy of claim 3, wherein said solution treatment is a graded solution treatment; the grading solid solution treatment is to perform low-temperature solid solution treatment and then perform high-temperature solid solution treatment; the temperature of the low-temperature solution treatment is 460-480 ℃, and the time of the low-temperature solution treatment is 6-8 h; the temperature of the high-temperature solution treatment is 510-530 ℃, and the time of the high-temperature solution treatment is 6-8 h.
5. The magnesium alloy of claim 3, wherein said aging treatment is a step aging treatment; the grading aging treatment comprises the steps of firstly carrying out low-temperature aging treatment and then carrying out high-temperature aging treatment; the temperature of the low-temperature aging treatment is 200-220 ℃, and the time of the low-temperature aging treatment is 10-12 h; the temperature of the high-temperature aging treatment is 230-250 ℃, and the time of the high-temperature aging treatment is 1-2 h.
6. The preparation method of the magnesium alloy is characterized by comprising the following steps of: casting a precursor alloy melt of the magnesium alloy to obtain an ingot, and then sequentially carrying out solid solution treatment and aging treatment on the ingot; the magnesium alloy consists of the following elements in percentage by mass: 4.0-4.4% of Sm, 1.8-2.2% of Nd, 1.2-1.6% of Gd, 0.6-0.8% of Sb, 0.3-0.5% of Al and the balance of Mg.
7. The method for producing a magnesium alloy according to claim 6, wherein the Sm, Nd and Gd account for less than 8% of the total mass of the magnesium alloy.
8. The method for producing a magnesium alloy according to claim 6 or 7, wherein the precursor alloy melt is produced by a method comprising the steps of: heating magnesium and magnesium samarium neodymium gadolinium alloy to 730-750 ℃ under a protective atmosphere to obtain a melt, and then adding antimony and aluminum into the melt to obtain a precursor alloy melt; the magnesium samarium neodymium gadolinium alloy is prepared by adopting a method comprising the following steps of: heating magnesium, a magnesium samarium alloy, a magnesium neodymium alloy and a magnesium gadolinium alloy to 730-750 ℃ under a protective atmosphere to obtain an alloy liquid, and then casting to obtain the magnesium samarium neodymium gadolinium alloy; the magnesium-samarium alloy is Mg-25 Sm; the magnesium neodymium alloy is Mg-25 Nd; the magnesium-gadolinium alloy is Mg-25 Gd; the mass ratio of magnesium to the magnesium-samarium-neodymium-gadolinium alloy adopted in the preparation method of the magnesium-samarium-neodymium-gadolinium alloy is (37-41) to (32-36).
9. The method for producing a magnesium alloy according to claim 6 or 7, wherein the solution treatment is a stepwise solution treatment; the grading solid solution treatment is to perform low-temperature solid solution treatment and then perform high-temperature solid solution treatment; the temperature of the low-temperature solution treatment is 460-480 ℃, and the time of the low-temperature solution treatment is 6-8 h; the temperature of the high-temperature solution treatment is 510-530 ℃, and the time of the high-temperature solution treatment is 6-8 h.
10. The method for producing a magnesium alloy according to claim 6 or 7, wherein the aging treatment is a step aging treatment; the grading aging treatment comprises the steps of firstly carrying out low-temperature aging treatment and then carrying out high-temperature aging treatment; the temperature of the low-temperature aging treatment is 200-220 ℃, and the time of the low-temperature aging treatment is 10-12 h; the temperature of the high-temperature aging treatment is 230-250 ℃, and the time of the high-temperature aging treatment is 1-2 h.
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| JPH0649580A (en) * | 1992-06-30 | 1994-02-22 | Mitsui Mining & Smelting Co Ltd | High-strength magnesium alloy containing gadolinium and samarium |
| CN102181763A (en) * | 2011-05-22 | 2011-09-14 | 河南科技大学 | Rare earth magnesium alloy with stable high-temperature strength |
| CN103146972A (en) * | 2013-03-14 | 2013-06-12 | 河南科技大学 | Multielement rare-earth magnesium alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0649580A (en) * | 1992-06-30 | 1994-02-22 | Mitsui Mining & Smelting Co Ltd | High-strength magnesium alloy containing gadolinium and samarium |
| CN102181763A (en) * | 2011-05-22 | 2011-09-14 | 河南科技大学 | Rare earth magnesium alloy with stable high-temperature strength |
| CN103146972A (en) * | 2013-03-14 | 2013-06-12 | 河南科技大学 | Multielement rare-earth magnesium alloy and preparation method thereof |
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