CN111607727A - Ce and Ca element synergistically strengthened low-cost wrought magnesium alloy and preparation method thereof - Google Patents
Ce and Ca element synergistically strengthened low-cost wrought magnesium alloy and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a low-cost wrought magnesium alloy cooperatively reinforced by Ce and Ca elements and a preparation method thereof, belonging to the field of wrought magnesium alloy materials; the invention relates to a high-strength wrought magnesium alloy containing light rare earth elements, which comprises the following components in percentage by mass: cerium: 0.2-1.2%; aluminum: 0.1-1.0%; calcium: 0 to 0.4 percent; zinc: 0.1-1.0%; manganese: 0.1 to 1.0%, and the balance of magnesium and inevitable impurities (Si, Ni, Cu, etc.). The preparation method of the low-cost wrought magnesium alloy comprises the following steps: firstly melting a pure magnesium ingot, adding metal cerium, calcium, manganese, aluminum, zinc and the like after fully melting, casting the ingot after fully stirring, then carrying out homogenization treatment on the ingot, and extruding the ingot by a reverse extrusion process to obtain a corresponding extruded section; the novel wrought magnesium alloy with high strength and high plasticity is prepared by smelting, homogenizing treatment and subsequent extrusion (backward extrusion) processes, the strength and toughness of the wrought magnesium alloy are enhanced, and the wrought magnesium alloy has good mechanical properties.
Description
Technical Field
The invention belongs to the field of magnesium alloy materials, and particularly relates to a cerium-containing wrought magnesium alloy and a preparation method thereof.
Background
In recent years, energy crisis, resource exhaustion and environmental deterioration have made higher demands on light weight, energy saving, emission reduction, low carbon and environmental protection of the automobile industry. Magnesium alloys are receiving more and more attention due to their excellent characteristics such as low density, high specific strength, easy recovery, and good electromagnetic shielding performance. Although more magnesium alloys are currently applied or cast magnesium alloys, the wrought magnesium alloy material has higher strength, better ductility and more excellent comprehensive mechanical properties, and is gradually applied to the field of rail transit. The magnesium alloy with high rare earth content limits the large-scale application due to higher cost, and in recent years, much attention has been paid to novel non-rare earth wrought magnesium alloys, particularly to the research on elements such as Mg-Sn-Ca and Mg-Al-Ca-Mn- (Zn), wherein the Mg-Sn-Ca system has higher strength but lower elongation, and the Mg-Al-Ca-Mn- (Zn) alloy has excellent plasticity but the strength still needs to be further optimized. The light rare earth element Ce and the alkaline earth metal element Ca which are relatively low in price can improve the alloy strength and can obtain excellent comprehensive mechanical property because the light rare earth element Ce and the alkaline earth metal element Ca can effectively promote c + a dislocation slip in Mg alloy to improve plasticity, so that the development of the high-performance wrought magnesium alloy with low content of the light rare earth element has important significance for the development of the magnesium alloy.
The inventor has applied for high-strength and high-plasticity Mg-Ca-Al-Zn-Mn-Ce wrought magnesium alloy and a preparation method thereof (application publication number is CN 110066948A), and the magnesium alloy comprises the following components: calcium: 0.5-3.2%; aluminum: 0.3-3.5%; zinc: 0.3-1.0%; manganese: 0.1-3.0%; cerium: 0.1-0.5%, and the balance of magnesium. The difference of the method is that the content of calcium is reduced, the content of cerium is increased, and the mechanical property of the alloy is obviously improved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a cerium-containing wrought magnesium alloy and a preparation method thereof, and the cerium-containing wrought magnesium alloy with toughness and toughness is prepared.
The cerium-containing wrought magnesium alloy comprises the following components in percentage by mass: cerium: 0.2-1.2%; aluminum: 0.1-1.0%; calcium: 0 to 0.4 percent; zinc: 0.1-3.0%; manganese: 0.1 to 1.0% and the balance of magnesium and unavoidable impurities.
The wrought magnesium alloy containing the light rare earth elements has the following tensile strength: 290-480 MPa, and the yield strength is as follows: 278MPa to 440MPa, and the elongation is as follows: 1 to 26 percent.
The preparation method of the non-rare earth calcium-containing wrought magnesium alloy bar specifically comprises the following steps:
(1) preparing raw materials: weighing required alloy raw materials according to the proportion of the cerium-containing wrought magnesium alloy;
(2) smelting of cast ingots: heating magnesium to 740-780 ℃ under the protection of protective gas;
according to the proportioning components of the deformed magnesium alloy containing cerium, adding the metal material in two batches:
in the first batch: adding pure magnesium and melting completely;
and (3) second batch: adding pure cerium or magnesium-cerium intermediate alloy, pure aluminum, pure calcium or magnesium-calcium intermediate alloy, pure zinc, manganese or magnesium-manganese intermediate alloy;
fully stirring for 3-6 minutes after all the materials are melted, controlling the temperature of the molten liquid at 700-750 ℃, standing for 10-20 minutes, removing floating slag on the surface, and casting the molten liquid into an iron mold preheated to 200-350 ℃ under the condition of 700-750 ℃ to prepare a cerium-containing deformed magnesium alloy ingot;
(3) homogenizing: carrying out homogenization treatment on the deformed magnesium alloy ingot containing cerium by isolating air: heating to 480-530 ℃, preserving heat for 12-18 hours, and water quenching to obtain a homogenized cerium-containing wrought magnesium alloy ingot.
(4) And (3) reverse extrusion: turning a surface oxide skin of a homogenized cerium-containing wrought magnesium alloy ingot, preheating for 15 minutes at 250-350 ℃, smearing graphite for lubrication, and performing backward extrusion at the temperature of 200-350 ℃; the extrusion ratio is (10-30): 1, extruding at the speed of 0.1-2.7 mm/s to obtain the deformed magnesium alloy bar containing the cerium element.
In the step (4), the optimal extrusion ratio is 20:1, the optimal extrusion speed is 0.5 mm/s.
Has the advantages that:
the cerium-containing wrought magnesium alloy provided by the invention is a novel wrought magnesium alloy containing trace light rare earth and having toughness and toughness, the strength and plasticity of the alloy are obviously improved by adding the cerium element, and firstly, the cerium element has the function of grain refinement, so that the initial structure can be refined, and the initial structure is more uniform. Secondly, in the subsequent thermal mechanical processing process, according to different contents, cerium can form an Mg12Ce phase in the alloy, which is beneficial to promoting dynamic recrystallization behavior and strengthening the alloy through an Orowan mechanism; moreover, under the coordination of alloy elements such as Al and Ca, the Ce element can generate segregation behavior to promote small-angle grain boundaries and dislocation generated in the stable deformation process, and finally, the Ce element dissolved in the matrix effectively promotes the magnesium alloy to generate c + a dislocation, so that the improvement of alloy plasticity is facilitated.
Drawings
FIG. 1 is a stress-strain curve of Mg-0.2Ce at different extrusion rates.
FIG. 2 shows the microstructure of Mg-0.2Ce at 300 ℃ and 1.2mm/s in the extrusion condition.
FIG. 3 shows the comparison of the mechanical properties of Mg-0.2Ce, Mg-0.2Ce-0.3Ca, and Mg-0.2Ce-0.3Ca-0.5Mn alloys.
FIG. 4 shows an as-extruded microstructure of the Mg-0.2Ce-0.3Ca alloy.
FIG. 5 shows an extruded microstructure of the Mg-0.2Ce-0.3Ca-0.5Mn alloy.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. The invention will be further explained below with reference to the drawings and the embodiments of the substrate.
Example 1
The cerium-containing wrought magnesium alloy Mg-0.2Ce comprises the following components in percentage by mass: 0.2wt.% Ce, balance Mg.
The preparation method of the cerium-containing wrought magnesium alloy comprises the following steps:
(1) weighing the following components in percentage by mass: 0.2wt.% of cerium, the balance being magnesium, the cerium being pure cerium or a magnesium-cerium intermediate alloy;
(2) smelting of cast ingots: under the protection of high-purity argon, heating industrial pure magnesium to be molten, adding an alloy element Ce, fully stirring after melting, beating off scum on the surface after standing, and casting into a preheated mold to prepare a cerium-containing deformed magnesium alloy ingot;
(3) homogenizing: insulating air from the cast ingot under the coverage of graphite powder, heating to 530 ℃ for homogenization treatment for 12 hours, and performing water quenching to obtain a homogenized alloy ingot;
(4) and (3) reverse extrusion: preheating the homogenized alloy ingot at 300 ℃ after turning a skin, smearing graphite for lubrication, and performing reverse extrusion at 300 ℃; the extrusion ratio is 20:1, and the extrusion speed is 1.2mm/s, so as to obtain the magnesium alloy bar.
The mechanical property test result of the deformed magnesium alloy bar containing cerium prepared in this example is shown in fig. 1, and the bar obtained by extruding the deformed magnesium alloy containing cerium at 300 ℃ has the following tensile strength: 365MPa, yield strength: 355MPa, elongation: 6.2 percent.
Example 2
The cerium-containing wrought magnesium alloy Mg-0.2Ce comprises the following components in percentage by mass: 0.2wt.% Ce, balance Mg.
The preparation method of the cerium-containing wrought magnesium alloy comprises the following steps:
(1) weighing the following components in percentage by mass: 0.2wt.% of cerium, the balance being magnesium, the cerium being pure cerium or a magnesium-cerium intermediate alloy;
(2) smelting of cast ingots: under the protection of high-purity argon, heating industrial pure magnesium to be molten, adding an alloy element Ce, fully stirring after melting, beating off scum on the surface after standing, and casting into a preheated mold to prepare a cerium-containing deformed magnesium alloy ingot;
(3) homogenizing: insulating air from the cast ingot under the coverage of graphite powder, heating to 530 ℃ for homogenization treatment for 12 hours, and performing water quenching to obtain a homogenized alloy ingot;
(4) and (3) reverse extrusion: preheating the homogenized alloy ingot at 260 ℃ after turning a skin, smearing graphite for lubrication, and performing reverse extrusion at 260 ℃; the extrusion ratio is 20:1, and the extrusion speed is 1.2mm/s, so as to obtain the magnesium alloy bar.
The mechanical property test result of the deformed magnesium alloy bar containing cerium prepared in this example is shown in fig. 1, and the bar obtained by extruding the deformed magnesium alloy containing cerium at 300 ℃ has the following tensile strength: 350MPa, yield strength: 342MPa, elongation: 2.5 percent.
Example 3
The cerium-containing wrought magnesium alloy Mg-0.2Ce comprises the following components in percentage by mass: 0.2wt.% Ce, balance Mg.
The preparation method of the cerium-containing wrought magnesium alloy comprises the following steps:
(1) weighing the following components in percentage by mass: 0.2wt.% of cerium, the balance being magnesium, the cerium being pure cerium or a magnesium-cerium intermediate alloy;
(2) smelting of cast ingots: under the protection of high-purity argon, heating industrial pure magnesium to be molten, adding an alloy element Ce, fully stirring after melting, beating off scum on the surface after standing, and casting into a preheated mold to prepare a cerium-containing deformed magnesium alloy ingot;
(3) homogenizing: insulating air from the cast ingot under the coverage of graphite powder, heating to 530 ℃ for homogenization treatment for 12 hours, and performing water quenching to obtain a homogenized alloy ingot;
(4) and (3) reverse extrusion: preheating the homogenized alloy ingot at 300 ℃ after turning a skin, smearing graphite for lubrication, and performing reverse extrusion at 300 ℃; the extrusion ratio is 20:1, and the extrusion speed is 2.7mm/s, so as to obtain the magnesium alloy bar.
The mechanical property test result of the deformed magnesium alloy bar containing cerium prepared in this example is shown in fig. 1, and the bar obtained by extruding the deformed magnesium alloy containing cerium at 300 ℃ has the following tensile strength: 290MPa, yield strength: 278MPa, elongation: 9.8 percent.
Example 4
The cerium-containing wrought magnesium alloy Mg-0.2Ce-0.3Ca comprises the following components in percentage by mass: 0.2wt.% Ce, 0.3wt.% Ca, balance Mg.
The preparation method of the cerium-containing wrought magnesium alloy comprises the following steps:
(1) weighing the following components in percentage by mass: 0.2wt.% of cerium, 0.3wt.% of calcium and the balance of magnesium, wherein the cerium is pure cerium or magnesium-cerium intermediate alloy, and the calcium is pure calcium or magnesium-calcium intermediate alloy;
(2) smelting of cast ingots: under the protection of high-purity argon, heating industrial pure magnesium to be molten, adding alloy elements Ce and Ca, fully stirring after melting, removing scum on the surface after standing, and casting into a preheated mold to prepare a cerium-containing deformed magnesium alloy ingot;
(3) homogenizing: insulating air from the cast ingot under the coverage of graphite powder, heating to 510 ℃ for homogenization treatment for 12 hours, and performing water quenching to obtain an alloy ingot subjected to homogenization treatment;
(4) and (3) reverse extrusion: preheating the homogenized alloy ingot at 250 ℃ after turning a skin, smearing graphite for lubrication, and performing reverse extrusion at 250 ℃; the extrusion ratio is 20:1, and the extrusion speed is 0.5mm/s, so as to obtain the magnesium alloy bar.
The mechanical property test result of the deformed magnesium alloy bar containing cerium prepared in this example is shown in fig. 3, and the bar obtained by extruding the deformed magnesium alloy containing cerium at 250 ℃ has the following tensile strength: 377MPa, yield strength: 372MPa, elongation: 1 percent.
Example 5
The cerium-containing wrought magnesium alloy Mg-0.2Ce-0.3Ca-0.1Mn comprises the following components in percentage by mass: 0.2wt.% Ce, 0.3wt.% Ca, 0.1wt.% Mn, the balance Mg.
The preparation method of the cerium-containing wrought magnesium alloy comprises the following steps:
(1) weighing the following components in percentage by mass: 0.2wt.% of cerium, 0.3wt.% of calcium, 0.1wt.% of manganese and the balance of magnesium, wherein the cerium is pure cerium or magnesium-cerium intermediate alloy, the calcium is pure calcium or magnesium-calcium intermediate alloy, and the manganese is magnesium-manganese intermediate alloy;
(2) smelting of cast ingots: under the protection of high-purity argon, heating industrial pure magnesium to be molten, adding alloy elements Ce and Ca, fully stirring after Mn is molten, standing, removing scum on the surface, and casting into a preheated mold to prepare a cerium-containing deformed magnesium alloy ingot;
(3) homogenizing: insulating air from the cast ingot under the coverage of graphite powder, heating to 510 ℃ for homogenization treatment for 12 hours, and performing water quenching to obtain an alloy ingot subjected to homogenization treatment;
(4) and (3) reverse extrusion: preheating the homogenized alloy ingot at 300 ℃ after turning a skin, smearing graphite for lubrication, and performing reverse extrusion at 300 ℃; the extrusion ratio is 20:1, and the extrusion speed is 0.5mm/s, so as to obtain the magnesium alloy bar.
The mechanical property test result of the deformed magnesium alloy bar containing cerium prepared in this example is shown in fig. 3, and the bar obtained by extruding the deformed magnesium alloy containing cerium at 300 ℃ has the following tensile strength: 411MPa, yield strength: 403MPa, elongation: 1.6 percent.
Example 6
The cerium-containing wrought magnesium alloy Mg-0.2Ce-0.3Ca-0.5Mn-0.5Zn comprises the following components in percentage by mass: 0.2wt.% Ce, 0.3wt.% Ca, 0.5wt.% Mn, 0.5wt.% Zn, balance Mg.
The preparation method of the cerium-containing wrought magnesium alloy comprises the following steps:
(1) weighing the following components in percentage by mass: 0.2wt.% of cerium, 0.3wt.% of calcium, 0.5wt.% of manganese, 0.5wt.% of zinc and the balance of magnesium, wherein cerium is pure cerium or a magnesium-cerium intermediate alloy, calcium is pure calcium or a magnesium-calcium intermediate alloy, and manganese is a magnesium-manganese intermediate alloy;
(2) smelting of cast ingots: under the protection of high-purity argon, heating industrial pure magnesium to be molten, adding alloy elements Ce, Ca, Mn and Zn, fully stirring after melting, removing scum on the surface after standing, and casting into a preheated mold to prepare a cerium-containing deformed magnesium alloy ingot;
(3) homogenizing: insulating air from the cast ingot under the coverage of graphite powder, heating to 510 ℃ for homogenization treatment for 12 hours, and performing water quenching to obtain an alloy ingot subjected to homogenization treatment;
(4) and (3) reverse extrusion: preheating the homogenized alloy ingot at 300 ℃ after turning a skin, smearing graphite for lubrication, and performing reverse extrusion at 300 ℃; the extrusion ratio is 20:1, and the extrusion speed is 0.5mm/s, so as to obtain the magnesium alloy bar.
The wrought magnesium alloy prepared by the embodiment is a bar extruded at 300 ℃, and the tensile strength of the bar is as follows: 423MPa, yield strength: 401MPa, elongation: 3.5 percent.
Example 7
A low-cost wrought magnesium alloy Mg-0.8Ce-0.4Ca-1.0Mn-1.0Zn-0.1Al synergistically reinforced by Ce and Ca elements comprises the following components in percentage by mass: 0.8 wt.% Ce, 0.4wt.% Ca, 1.0wt.% Mn, 1.0wt.% Zn, 0.1wt.% Al, the balance being Mg.
The preparation method of the wrought magnesium alloy comprises the following steps:
(1) weighing the following components in percentage by mass: 0.8 wt.% of cerium, 0.4wt.% of calcium, 1.0wt.% of manganese, 1.0wt.% of zinc, 0.1wt.% of aluminum, and the balance of magnesium, wherein cerium is pure cerium or a magnesium-cerium intermediate alloy, calcium is pure calcium or a magnesium-calcium intermediate alloy, and manganese is a magnesium-manganese intermediate alloy;
(2) smelting of cast ingots: under the protection of high-purity argon, heating industrial pure magnesium to be molten, adding alloy elements Ce, Ca, Mn, Zn and Al, fully stirring after melting, removing scum on the surface after standing, and casting into a preheated mold to prepare an alloy ingot;
(3) homogenizing: insulating air from the cast ingot under the coverage of graphite powder, heating to 510 ℃ for homogenization treatment for 12 hours, and performing water quenching to obtain an alloy ingot subjected to homogenization treatment;
(4) and (3) reverse extrusion: preheating the homogenized alloy ingot at 330 ℃ after turning a skin, smearing graphite for lubrication, and performing backward extrusion at 330 ℃; the extrusion ratio is 20:1, and the extrusion speed is 0.5mm/s, so as to obtain the magnesium alloy bar.
The wrought magnesium alloy prepared in the embodiment is a bar extruded at 330 ℃, and the tensile strength of the bar is as follows: 465MPa, yield strength: 423MPa, and the elongation is: 2.8 percent.
Example 8
A low-cost wrought magnesium alloy Mg-1.2Ce-0.2Ca-0.9Mn-0.1Zn-1.0Al synergistically reinforced by Ce and Ca elements comprises the following components in percentage by mass: 1.2 wt.% Ce, 0.2wt.% Ca, 0.9wt.% Mn, 0.1wt.% Zn, 1.0wt.% Al, balance Mg.
The preparation method of the wrought magnesium alloy comprises the following steps:
(1) weighing the following components in percentage by mass: 1.2 wt.% of cerium, 0.2wt.% of calcium, 0.9wt.% of manganese, 0.1wt.% of zinc, 1.0wt.% of aluminum, and the balance of magnesium, wherein cerium is pure cerium or a magnesium-cerium intermediate alloy, calcium is pure calcium or a magnesium-calcium intermediate alloy, and manganese is a magnesium-manganese intermediate alloy;
(2) smelting of cast ingots: under the protection of high-purity argon, heating industrial pure magnesium to be molten, adding alloy elements Ce, Ca, Mn, Zn and Al, fully stirring after melting, removing scum on the surface after standing, and casting into a preheated mold to prepare an alloy ingot;
(3) homogenizing: insulating air from the cast ingot under the coverage of graphite powder, heating to 510 ℃ for homogenization treatment for 12 hours, and performing water quenching to obtain an alloy ingot subjected to homogenization treatment;
(4) and (3) reverse extrusion: preheating the homogenized alloy ingot at 350 ℃ after turning a skin, smearing graphite for lubrication, and performing reverse extrusion at 350 ℃; the extrusion ratio is 20:1, and the extrusion speed is 0.3mm/s, so as to obtain the magnesium alloy bar.
The wrought magnesium alloy prepared by the embodiment is a bar extruded at 350 ℃, and the tensile strength of the bar is as follows: 473MPa, yield strength: 440MPa, elongation is: 6.9 percent.
Example 9
A low-cost wrought magnesium alloy Mg-0.2Ce-0.2Ca-0.5Mn-0.5Zn-0.5Al synergistically reinforced by Ce and Ca elements comprises the following components in percentage by mass: 0.2wt.% Ce, 0.2wt.% Ca, 0.5wt.% Mn, 0.5wt.% Zn, 0.5wt.% Al, the balance being Mg.
The preparation method of the wrought magnesium alloy comprises the following steps:
(1) weighing the following components in percentage by mass: 0.2wt.% of cerium, 0.2wt.% of calcium, 0.5wt.% of manganese, 0.5wt.% of zinc, 0.5wt.% of aluminum, and the balance of magnesium, wherein cerium is pure cerium or a magnesium-cerium intermediate alloy, calcium is pure calcium or a magnesium-calcium intermediate alloy, and manganese is a magnesium-manganese intermediate alloy;
(2) smelting of cast ingots: under the protection of high-purity argon, heating industrial pure magnesium to be molten, adding alloy elements Ce, Ca, Mn and Zn, fully stirring Al after the Al is molten, standing, removing scum on the surface, and casting the mixture into a preheated mold to prepare an alloy ingot;
(3) homogenizing: insulating air from the cast ingot under the coverage of graphite powder, heating to 510 ℃ for homogenization treatment for 12 hours, and performing water quenching to obtain an alloy ingot subjected to homogenization treatment;
(4) and (3) reverse extrusion: preheating the homogenized alloy ingot at 350 ℃ after turning a skin, smearing graphite for lubrication, and performing reverse extrusion at 350 ℃; the extrusion ratio is 20:1, and the extrusion speed is 0.3mm/s, so as to obtain the magnesium alloy bar.
The wrought magnesium alloy prepared by the embodiment is a bar extruded at 350 ℃, and the tensile strength of the bar is as follows: 420MPa, yield strength: 392MPa, elongation: 26 percent.
Compared with the existing material, the low-cost wrought magnesium alloy cooperatively reinforced by Ce and Ca elements and the preparation method thereof provided by the invention have the following advantages:
1. under the condition of microalloying level, the Mg-Ce-Ca alloy can realize the grain refinement of ultrafine crystals and even nano crystals;
2. the segregation of elements at dislocation positions can be induced after the Ce and Ca are added together, which is difficult to realize in the conventional magnesium alloy because the conventional magnesium alloy generally depends on the grain refinement realized by the segregation of a nanometer second phase and the segregation at grain boundaries, and the refining effect is limited;
3. therefore, the alloy can realize ultrafine crystal under the condition of adding extremely low alloying elements, the grain size can reach the size of 100 nm, and the segregation at the dislocation line plays a key role;
4. the corrosion resistance of the magnesium alloy with the micro-alloying level is generally more excellent than that of the magnesium alloy with higher alloying level, so that the magnesium alloy with high strength, low cost and excellent corrosion resistance is a typical characteristic of the micro-alloying Mg-Ce-Ca series alloy in the patent of the invention.
Claims (10)
1. A low-cost wrought magnesium alloy cooperatively reinforced by Ce and Ca elements is characterized by comprising the following components in percentage by mass: cerium: 0.2-1.2%; aluminum: 0.1-1.0%; calcium: 0 to 0.4 percent; zinc: 0.1-1.0%; manganese: 0.1 to 1.0% and the balance of magnesium and unavoidable impurities.
2. The low-cost wrought magnesium alloy cooperatively strengthened by Ce and Ca elements according to claim 1, wherein the ratio of Ca: 0.2 to 0.4 percent.
3. The low-cost wrought magnesium alloy cooperatively strengthened by Ce and Ca elements according to claim 1, wherein the ratio of Ce: 0.2%, the calcium: 0.3%, the manganese: 0.1 percent.
4. The low-cost wrought magnesium alloy cooperatively strengthened by Ce and Ca elements according to claim 1, wherein the ratio of Ce: 0.8%, the calcium: 0.4%, the manganese: 1.0%, the ratio of zinc: 1.0%, the aluminum: 0.1 percent.
5. The low-cost wrought magnesium alloy cooperatively strengthened by Ce and Ca elements according to claim 1, wherein the ratio of Ce: 1.2%, the calcium: 0.2%, the manganese: 0.9%, the ratio of zinc: 0.1%, the aluminum: 1.0 percent.
6. The low-cost wrought magnesium alloy cooperatively strengthened by Ce and Ca elements according to claim 1, wherein the ratio of Ce: 0.2%, the calcium: 0.2%, the manganese: 0.5%, the ratio of zinc: 0.5%, the aluminum: 0.5 percent.
7. The method for producing a magnesium alloy according to any one of claims 1 to 6, characterized by comprising the steps of:
(1) preparing raw materials: weighing the required raw materials according to the mass percentage of the components of the cerium-containing wrought magnesium alloy;
(2) smelting of cast ingots: under the protection of protective gas, adding the raw materials in two batches:
in the first batch: adding pure magnesium, heating to 740-780 ℃, fully stirring and completely melting;
and (3) second batch: pure cerium or magnesium-cerium intermediate alloy, pure aluminum, pure calcium or magnesium-calcium intermediate alloy, pure zinc, manganese or magnesium-manganese intermediate alloy; fully stirring for 3-6 minutes, controlling the temperature of the molten liquid at 700-750 ℃, standing for 10-20 minutes, removing floating slag on the surface, and casting into an iron mold preheated to 200-350 ℃ to prepare a cerium-containing deformed magnesium alloy ingot;
(3) homogenizing: isolating the deformed magnesium alloy ingot containing cerium from air, heating to 480-530 ℃, preserving heat for 12-18 hours, and performing water quenching to obtain a homogenized magnesium alloy ingot;
(4) and (3) reverse extrusion: turning a surface oxide skin of a homogenized magnesium alloy ingot, preheating for 15 minutes at 200-350 ℃, smearing graphite for lubrication, and performing reverse extrusion at the temperature of 200-350 ℃, wherein the extrusion ratio is (10-30): 1, and the extrusion speed is 0.1-2.7 mm/s, so as to obtain the cerium-containing deformed magnesium alloy rod.
8. The method according to claim 7, wherein in the step (1), the raw materials are pure metals or magnesium master alloys.
9. The method according to claim 7, wherein in the step (2), the protective gas is high-purity argon.
10. The preparation method according to claim 7, wherein in the step (3), the cerium-containing wrought magnesium alloy ingot is isolated from air by: covering with graphite powder or in vacuum environment or under protective gas, wherein the protective gas is argon, helium or nitrogen.
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| CN (1) | CN111607727A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113981286A (en) * | 2021-11-01 | 2022-01-28 | 吉林大学 | Corrosion-resistant high-strength plastic magnesium alloy and preparation method thereof |
| CN114182148A (en) * | 2021-12-07 | 2022-03-15 | 包头稀土研究院 | Multicomponent Mg-RE magnesium alloy and its prepn |
| CN114540682A (en) * | 2022-02-28 | 2022-05-27 | 吉林大学 | Multi-element microalloying high-efficiency extruded magnesium alloy and preparation method thereof |
| CN114990399A (en) * | 2022-04-06 | 2022-09-02 | 吉林大学 | Weak segregation high-corrosion-resistance magnesium alloy and preparation method thereof |
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| CN110066948A (en) * | 2019-04-29 | 2019-07-30 | 东北大学 | High-strength high-plasticity Mg-Ca-Al-Zn-Mn-Ce wrought magnesium alloy and preparation method thereof |
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| CN110066948A (en) * | 2019-04-29 | 2019-07-30 | 东北大学 | High-strength high-plasticity Mg-Ca-Al-Zn-Mn-Ce wrought magnesium alloy and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113981286A (en) * | 2021-11-01 | 2022-01-28 | 吉林大学 | Corrosion-resistant high-strength plastic magnesium alloy and preparation method thereof |
| CN113981286B (en) * | 2021-11-01 | 2022-06-21 | 吉林大学 | Corrosion-resistant high-strength plastic magnesium alloy and preparation method thereof |
| CN114182148A (en) * | 2021-12-07 | 2022-03-15 | 包头稀土研究院 | Multicomponent Mg-RE magnesium alloy and its prepn |
| CN114540682A (en) * | 2022-02-28 | 2022-05-27 | 吉林大学 | Multi-element microalloying high-efficiency extruded magnesium alloy and preparation method thereof |
| CN114540682B (en) * | 2022-02-28 | 2022-11-11 | 吉林大学 | Multi-element microalloying high-efficiency extruded magnesium alloy and preparation method thereof |
| CN114990399A (en) * | 2022-04-06 | 2022-09-02 | 吉林大学 | Weak segregation high-corrosion-resistance magnesium alloy and preparation method thereof |
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Application publication date: 20200901 |