CN109252078B - Preparation method of high-strength titanium-containing cast magnesium alloy - Google Patents
Preparation method of high-strength titanium-containing cast magnesium alloy Download PDFInfo
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- CN109252078B CN109252078B CN201811371847.5A CN201811371847A CN109252078B CN 109252078 B CN109252078 B CN 109252078B CN 201811371847 A CN201811371847 A CN 201811371847A CN 109252078 B CN109252078 B CN 109252078B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
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- 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/06—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of magnesium or alloys based thereon
Abstract
The invention relates to a preparation method of high-strength titanium-containing cast magnesium alloy, which is characterized in that trace element Ti is added to refine grains, magnesium ingots, zinc ingots, titanium powder, magnesium gadolinium intermediate alloy and magnesium yttrium intermediate alloy are used as raw materials, the raw materials are smelted in a vacuum induction smelting furnace under the argon protection atmosphere, and the titanium-containing magnesium alloy ingots are prepared through casting forming and heat treatment methods.
Description
Technical Field
The invention relates to a preparation method of a high-strength titanium-containing cast magnesium alloy, belonging to the technical field of preparation and application of non-ferrous metal materials.
Background
The magnesium alloy is the lightest metal structure material at present, has the advantages of high specific strength and specific rigidity, good damping property, excellent heat conduction and electric conductivity, easy processing and forming, good electromagnetic shielding performance and the like, and has wide application value and application prospect in the fields of automobiles, aerospace, electronic communication and national defense and military. However, magnesium alloys have poor strength, corrosion resistance and creep resistance, which limits their applications. The rare earth magnesium alloy has high-temperature strength, excellent creep resistance and corrosion resistance, shows great application potential, particularly, the alloy with a long-period stacking ordered structure is widely regarded, the long-period structure phase has high hardness, high ductility and toughness and high elastic modulus, has good interface bonding property with a magnesium matrix, and can effectively improve the room-temperature and high-temperature mechanical properties of the magnesium alloy.
Because the magnesium alloy is in a close-packed hexagonal structure and has poor plasticity, the strength and the casting performance of the magnesium alloy can be effectively improved by adding a refiner, zirconium is widely applied to Mg-Gd-Y-Zn magnesium alloy as an excellent refiner, however, zirconium is added into the magnesium alloy in a way of intermediate alloy, the production process of the magnesium-zirconium intermediate alloy is complex, the cost is high, the energy consumption is high, zirconium particles larger than 5 mu m can not be used as heterogeneous nucleation cores, the actually obtained amount in the alloy is difficult to control, and furthermore, the magnesium alloy grains refined by the intermediate alloy have low thermal stability and are easy to grow up in the high-temperature solid solution process. The alpha-Ti and the Mg are in a close-packed hexagonal structure, have close lattice constants, have good coherent relation and can serve as heterogeneous nucleation cores from the crystallography perspective; in addition, researches show that the growth restriction factor of Ti in an Mg-Ti binary system is high, the analytic ability of Ti in a magnesium matrix is strong, and the solute effect is obvious. At present, the technology for realizing the grain boundary strengthening of the magnesium alloy by adding trace Ti element is still in the research stage.
Disclosure of Invention
Object of the Invention
The invention aims to overcome the defects of strength and plasticity of magnesium alloy, and the high-strength titanium-containing cast magnesium alloy is prepared by taking magnesium ingots, zinc ingots, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy and titanium powder as raw materials through smelting in a vacuum induction smelting furnace, argon protection, casting molding and heat treatment, and has better thermal stability and excellent mechanical property by a grain boundary strengthening method.
Technical scheme
The chemical substance materials used in the invention are as follows: magnesium, zinc, titanium, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, argon, magnesium oxide, water glass, deionized water and absolute ethyl alcohol, wherein the combined preparation dosage is as follows: in grams, milliliters and centimeters3As a unit of measure
Magnesium: mg, purity 99.99%, solid block 817g + -0.01 g
Zinc: zn with purity of 99.98%, solid block of 24g +/-0.01 g
Magnesium gadolinium master alloy: Mg-Gd with purity of 99.98 percent, solid block of 500g +/-0.01 g
Magnesium yttrium master alloy: Mg-Y, purity 99.98%, solid block, 150g + -0.01 g
Titanium: ti, purity 99.98%, solid powder, 9 g. + -. 0.01g
Water glass: na (Na)2SiO3·9H2O, liquid, 10 mL. + -. 0.01mL
Magnesium oxide: MgO, solid powder, 50 g. + -. 0.01g
Anhydrous ethanol: c2H5OH, liquid, 2000 mL. + -. 10mL
Deionized water: h2O, liquid, 100 mL. + -. 5mL
Argon gas: ar, gaseous gas, 800000cm3±100cm3
The preparation method comprises the following steps:
(1) pretreating magnesium, zinc, magnesium gadolinium intermediate alloy and magnesium yttrium intermediate alloy
Cutting into blocks, namely placing magnesium, zinc, magnesium gadolinium intermediate alloy and magnesium yttrium intermediate alloy on a steel flat plate, and mechanically cutting into blocks, wherein the size of each block is less than or equal to 10mm multiplied by 8mm multiplied by 10 mm;
secondly, polishing the surfaces of the magnesium ingot, the zinc ingot, the magnesium gadolinium intermediate alloy and the magnesium yttrium intermediate alloy, and then cleaning the surfaces by using absolute ethyl alcohol;
thirdly, after cleaning, placing the mixture in a vacuum drying oven for preheating and drying, wherein the preheating and drying temperature is 200 ℃, the vacuum degree is 2Pa, and the drying time is 90 min;
(2) preparation of coating Agents
Weighing 50g +/-0.01 g of magnesium oxide, 10mL +/-0.01 mL of water glass, 100mL +/-5 mL of deionized water, adding into a slurry mixer for stirring, and stirring to obtain milky suspended liquid, namely a coating agent;
(3) preparation of open-close type mould
The open-close type die is made of stainless steel materials, the die cavity is cylindrical, and the surface roughness of the die cavity is Ra0.08-0.16 mu m;
(4) smelting titanium-containing magnesium alloy ingot
Smelting by adopting a vacuum induction smelting furnace;
cleaning, preheating and coating the inner surface;
cleaning the open-close type die cavity by absolute ethyl alcohol to clean the open-close type die cavity;
uniformly coating the surface of the cavity of the open-close type die with the prepared coating agent, wherein the thickness of the surface coating layer is 1.25 mm;
placing the die in a drying box with the preheating temperature of 200 ℃ for preheating;
opening the vacuum induction melting furnace, cleaning the interior of the melting crucible, and cleaning the interior of the melting crucible by using absolute ethyl alcohol to clean the interior of the melting crucible;
thirdly, placing a magnesium ingot, a zinc ingot, titanium powder, a magnesium gadolinium intermediate alloy and a magnesium yttrium intermediate alloy at the bottom of the crucible;
closing the vacuum induction smelting furnace and sealing;
starting a vacuum pump, extracting air in the furnace and enabling the pressure in the furnace to reach 2 Pa;
starting the medium-frequency induction heater, and starting heating at the heating temperature of 750 +/-2 ℃ for 60 min;
⑤ argon bottom blowing pipe is introduced into the bottom of the crucible, argon is introduced into the crucible, and the argon bottom blowing speed is 200cm3Min, keeping the pressure in the furnace constant at 1 atmosphere, and regulating and controlling by an air outlet valve; smelting into alloy melt, reducing the heating temperature to 720 +/-2 ℃, and keeping the temperature at the constant temperature for 8 min;
pouring
Closing an argon bottom blowing pipe;
opening a vacuum induction melting furnace;
removing slag on the surface of the melt in the smelting crucible;
aligning to a preheated opening-closing type mould pouring gate, and casting until the pouring gate is fully cast;
seventhly, cooling, namely embedding the open-close type die cast with the alloy melt into fine sand and cooling to 25 ℃;
opening the mould, opening the open-close type mould and taking out the casting;
(5) thermal treatment
Firstly, the method is carried out in a heat treatment furnace;
carrying out solid solution treatment on the titanium-containing magnesium alloy ingot obtained by smelting at 520 ℃ for 8 hours, and introducing argon for protection, wherein the argon introduction speed is 100cm3Min; after keeping the temperature at constant temperature, quickly putting the titanium-containing magnesium alloy ingot into warm water at 70 ℃ for quenching treatment, wherein the quenching time is 30 s;
placing the treated titanium-containing magnesium alloy ingot in a heat treatment furnace for aging treatment, wherein the aging temperature is 220 ℃, and the constant temperature and heat preservation time is 135 hours; then quickly placing the titanium-containing magnesium alloy ingot in warm water at 35 ℃ for quenching treatment, wherein the quenching time is 30s, and the quenched titanium-containing cast magnesium alloy ingot is a long-period structure reinforced titanium-containing cast magnesium alloy ingot;
(6) cleaning, washing and drying
Polishing the surface of a titanium-containing magnesium alloy ingot by using a tool, cleaning each part by using absolute ethyl alcohol, putting the cleaned parts in a vacuum drying oven, and drying for 15min at the drying temperature of 100 ℃ and the vacuum degree of 2 Pa;
(7) detection, analysis, characterization
Detecting, analyzing and characterizing the morphology, the metallographic structure and the mechanical property of the prepared titanium-containing magnesium alloy ingot:
carrying out metallographic structure analysis by using a metallographic analyzer;
carrying out crystal structure analysis by using an X-ray diffractometer;
carrying out microscopic morphology and chemical element analysis by using a scanning electron microscope;
using a microcomputer to control an electronic universal testing machine to analyze the mechanical property;
the conclusion is that the titanium-containing casting magnesium alloy ingot is a rectangular casting and contains α -Mg matrix phase and Mg under the casting condition5(Gd, Y, Zn) phase, Mg after solution treatment5The (Gd, Y, Zn) phase is converted into a 14H-LPSO phase, the tensile strength of the alloy reaches 357MPa, the elongation reaches 7.73 percent, and the purity of the product reaches 99.5 percent;
(8) storing and packaging
The prepared titanium-containing magnesium alloy ingot is packaged by a soft material and stored in a cool and dry place, and the storage temperature is 20 ℃ and the relative humidity is 8 percent, wherein the storage place needs to be waterproof, moistureproof, sun-proof and acid-base salt corrosion-proof.
Advantageous effects
Compared with the prior art, the invention has obvious advancement, takes magnesium ingot, zinc ingot, titanium powder, magnesium gadolinium intermediate alloy and magnesium yttrium intermediate alloy as raw materials, carries out smelting in a vacuum induction smelting furnace under the argon protection atmosphere, and prepares the titanium-containing magnesium alloy ingot through casting molding and heat treatment, achieves the purpose of refining grains by adding Ti, Gd and Y rare earth elements, regulates and controls the formation of long period structural phase, and obtains the cast magnesium alloy with high strength and good plasticity, the tensile strength of which reaches 357MPa, the elongation of which reaches 7.73 percent, and the product purity of which reaches 99.5 percent.
Drawings
FIG. 1 is a diagram showing a smelting state of a titanium-containing magnesium alloy ingot;
FIG. 2 is a metallographic structure diagram of an as-cast cross section of a titanium-magnesium alloy ingot;
FIG. 3 is a metallographic structure diagram of a solid solution state cross section of a titanium-containing magnesium alloy ingot;
FIG. 4 shows X-ray diffraction patterns of an as-cast state and a solid solution state of a titanium-containing magnesium alloy ingot;
FIG. 5 shows a microstructure and a Ti distribution diagram of a Ti-containing magnesium alloy ingot;
as shown in the figures, the list of reference numbers is as follows:
1. vacuum induction melting furnace, 2, furnace base, 3, the furnace chamber, 4, the outlet duct, 5, the air outlet valve, 6, the workstation, 7, smelt the crucible, 8, the intermediate frequency induction heater, 9, the alloy liquation, 10, argon gas, 11, the bottom blowing motor, 12, the bottom blowing pipe, 13, the vacuum pump, 14, the vacuum tube, 15, the argon gas cylinder, 16, the argon gas pipe, 17, the argon gas valve, 18, the electric cabinet, 19, the display screen, 20, the pilot lamp, 21, switch, 22, the intermediate frequency induction heating modulator, 23, the bottom blowing motor modulator, 24, the vacuum pump modulator, 25, first cable, 26, the second cable.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
FIG. 1 shows the smelting state diagram of Ti-containing Mg alloy ingot, which is operated in proper amount and order.
The amount of chemical substance used for preparation is determined in a predetermined range, in g, ml, cm3Is a unit of measurement.
Smelting the titanium-containing magnesium alloy in a vacuum induction smelting furnace, wherein the smelting is completed in the processes of medium-frequency induction heating, vacuumizing, argon bottom blowing and casting forming;
the vacuum induction smelting furnace is vertical, the bottom of the vacuum induction smelting furnace 1 is a furnace base 2, the inside is a furnace chamber 3, the bottom in the furnace chamber 3 is provided with a workbench 6, a smelting crucible 7 is placed on the workbench 6, the outside of the smelting crucible 7 is surrounded by a medium-frequency induction heater 8, and alloy melt 9 is arranged in the smelting crucible 7; an air outlet pipe 4 is arranged at the right upper part of the vacuum induction melting furnace 1 and is controlled by an air outlet valve 5; an argon gas bottle 15 is arranged at the left part of the vacuum smelting furnace 1, an argon gas pipe 16 and an argon gas valve 17 are arranged on the argon gas bottle 15, the argon gas pipe 16 is connected with a bottom blowing motor 11, the bottom blowing motor 11 is connected with a bottom blowing pipe 12, the bottom blowing pipe 12 penetrates through the furnace base 2 and the workbench 6 to be led into the smelting crucible 7, and the alloy liquid 9 is smelted and bottom blown; a vacuum pump 13 is arranged at the right lower part of the furnace base 2 and is communicated with the furnace chamber 3 through a vacuum pipe 14; an electric cabinet 18 is arranged at the right part of the vacuum induction melting furnace 1, and a display screen 19, an indicator light 20, a power switch 21, an intermediate frequency induction heating regulator 22, a bottom blowing motor regulator 23 and a vacuum pump regulator 24 are arranged on the electric cabinet 18; the electric cabinet 18 is connected with the medium-frequency induction heater 8 through a first cable 25; the electric cabinet 18 is connected with the bottom blowing motor 11 and the vacuum pump 13 through a second cable 26; the furnace chamber 3 is filled with argon 10; the pressure in the furnace chamber 3 is controlled by an air outlet pipe 4 and an air outlet valve 5.
FIG. 2 is a metallographic structure diagram of an as-cast cross section of an ingot of a titanium-containing magnesium alloy, wherein the microstructure of the alloy is mainly composed of two phases, a matrix phase α -Mg phase and Mg distributed along grain boundaries5(Gd, Y, Zn) phase; the average grain size of the titanium-containing magnesium alloy is less than 25 mu m, and the aim of strengthening the grain boundary can be achieved, so that the strength and the plasticity of the alloy are improved.
FIG. 3 is a metallographic structure diagram of a solid solution state cross section of a titanium-containing magnesium alloy ingot, wherein the microstructure of the alloy is composed of two phases, namely a matrix phase α -Mg phase and a 14H-LPSO phase, and Mg is formed during the solid solution treatment5The (Gd, Y, Zn) phase is converted into a 14H-LSPO phase with high temperature stability, thereby providing good plasticity for the alloy, and in addition, the crystal grains do not grow obviously after solution treatment, and show good thermal stability.
FIG. 4 shows X-ray diffraction patterns of an as-cast state and a solid solution state, respectively, of a titanium-containing magnesium alloy ingot, wherein α -Mg phase and Mg phase exist in the as-cast state5(Gd, Y, Zn) phase, Mg after solution treatment5The (Gd, Y, Zn) phase is changed into the 14H-LPSO phase.
FIG. 5 shows the microstructure and distribution of Ti element in the Ti-containing Mg alloy ingot, in which Ti element is mainly concentrated in the grain boundary to inhibit the growth of crystal grains, so as to strengthen the grain boundary of Mg alloy.
Claims (2)
1. A preparation method of high-strength titanium-containing cast magnesium alloy is characterized by comprising the following steps: the chemical materials used were: magnesium, zinc, titanium, magnesium gadolinium intermediate alloy, magnesium yttrium intermediate alloy, argon, magnesium oxide, water glass, deionized water and absolute ethyl alcohol, wherein the combined preparation dosage is as follows: in grams, milliliters and centimeters3As a unit of measure
Magnesium: mg, purity 99.99%, solid block 817g + -0.01 g
Zinc: zn with purity of 99.98%, solid block of 24g +/-0.01 g
Magnesium gadolinium master alloy: Mg-Gd with purity of 99.98 percent, solid block of 500g +/-0.01 g
Magnesium yttrium master alloy: Mg-Y, purity 99.98%, solid block, 150g + -0.01 g
Titanium: ti, purity 99.98%, solid powder, 9 g. + -. 0.01g
Water glass: na (Na)2SiO3·9H2O, liquid, 10 mL. + -. 0.01mL
Magnesium oxide: MgO, solid powder, 50 g. + -. 0.01g
Anhydrous ethanol: c2H5OH, liquid, 2000 mL. + -. 10mL
Deionized water: h2O, liquid, 100 mL. + -. 5mL
Argon gas: ar, gaseous gas, 800000cm3±100cm3
The preparation method comprises the following steps:
(1) pretreating magnesium, zinc, magnesium gadolinium intermediate alloy and magnesium yttrium intermediate alloy
Cutting into blocks, namely placing magnesium, zinc, magnesium gadolinium intermediate alloy and magnesium yttrium intermediate alloy on a steel flat plate, and mechanically cutting into blocks, wherein the size of each block is less than or equal to 10mm multiplied by 8mm multiplied by 10 mm;
secondly, polishing the surfaces of the magnesium ingot, the zinc ingot, the magnesium gadolinium intermediate alloy and the magnesium yttrium intermediate alloy, and then cleaning the surfaces by using absolute ethyl alcohol;
thirdly, after cleaning, placing the mixture in a vacuum drying oven for preheating and drying, wherein the preheating and drying temperature is 200 ℃, the vacuum degree is 2Pa, and the drying time is 90 min;
(2) preparation of coating Agents
Weighing 50g +/-0.01 g of magnesium oxide, 10mL +/-0.01 mL of water glass, 100mL +/-5 mL of deionized water, adding into a slurry mixer for stirring, and stirring to obtain milky suspended liquid, namely a coating agent;
(3) preparation of open-close type mould
The open-close type die is made of stainless steel materials, the die cavity is cylindrical, and the surface roughness of the die cavity is Ra0.08-0.16 mu m;
(4) smelting titanium-containing magnesium alloy ingot
Smelting by adopting a vacuum induction smelting furnace;
cleaning, preheating and coating the inner surface;
cleaning the open-close type die cavity by absolute ethyl alcohol to clean the open-close type die cavity;
uniformly coating the surface of the cavity of the open-close type die with the prepared coating agent, wherein the thickness of the surface coating layer is 1.25 mm;
placing the die in a drying box with the preheating temperature of 200 ℃ for preheating;
opening the vacuum induction melting furnace, cleaning the interior of the melting crucible, and cleaning the interior of the melting crucible by using absolute ethyl alcohol to clean the interior of the melting crucible;
thirdly, placing a magnesium ingot, a zinc ingot, titanium powder, a magnesium gadolinium intermediate alloy and a magnesium yttrium intermediate alloy at the bottom of the crucible;
closing the vacuum induction smelting furnace and sealing;
starting a vacuum pump, extracting air in the furnace and enabling the pressure in the furnace to reach 2 Pa;
starting the medium-frequency induction heater, and starting heating at the heating temperature of 750 +/-2 ℃ for 60 min;
⑤ argon bottom blowing pipe is introduced into the bottom of the crucible, argon is introduced into the crucible, and the argon bottom blowing speed is 200cm3Min, keeping the pressure in the furnace constant at 1 atmosphere, and regulating and controlling by an air outlet valve; smelting into alloy melt, reducing the heating temperature to 720 +/-2 ℃, and keeping the temperature at the constant temperature for 8 min;
pouring
Closing an argon bottom blowing pipe;
opening a vacuum induction melting furnace;
removing slag on the surface of the melt in the smelting crucible;
aligning to a preheated opening-closing type mould pouring gate, and casting until the pouring gate is fully cast;
seventhly, cooling, namely embedding the open-close type die cast with the alloy melt into fine sand and cooling to 25 ℃;
opening the mould, opening the open-close type mould and taking out the casting;
(5) thermal treatment
Firstly, the method is carried out in a heat treatment furnace;
carrying out solid solution treatment on the titanium-containing magnesium alloy ingot obtained by smelting at 520 ℃ for 8 hours, and introducing argon for protection, wherein the argon introduction speed is 100cm3Min; after keeping the temperature at constant temperature, quickly putting the titanium-containing magnesium alloy ingot into warm water at 70 ℃ for quenching treatment, wherein the quenching time is 30 s;
placing the treated titanium-containing magnesium alloy ingot in a heat treatment furnace for aging treatment, wherein the aging temperature is 220 ℃, and the constant temperature and heat preservation time is 135 hours; then quickly placing the titanium-containing magnesium alloy ingot in warm water at 35 ℃ for quenching treatment, wherein the quenching time is 30s, and the quenched titanium-containing cast magnesium alloy ingot is a long-period structure reinforced titanium-containing cast magnesium alloy ingot;
(6) cleaning, washing and drying
Polishing the surface of a titanium-containing magnesium alloy ingot by using a tool, cleaning each part by using absolute ethyl alcohol, putting the cleaned parts in a vacuum drying oven, and drying for 15min at the drying temperature of 100 ℃ and the vacuum degree of 2 Pa;
(7) detection, analysis, characterization
Detecting, analyzing and characterizing the morphology, the metallographic structure and the mechanical property of the prepared titanium-containing magnesium alloy ingot:
carrying out metallographic structure analysis by using a metallographic analyzer;
carrying out crystal structure analysis by using an X-ray diffractometer;
carrying out microscopic morphology and chemical element analysis by using a scanning electron microscope;
using a microcomputer to control an electronic universal testing machine to analyze the mechanical property;
the conclusion is that the titanium-containing casting magnesium alloy ingot is a rectangular casting and contains α -Mg matrix phase and Mg under the casting condition5(Gd, Y, Zn) phase, Mg after solution treatment5The (Gd, Y, Zn) phase is converted into a 14H-LPSO phase, the tensile strength of the alloy reaches 357MPa, the elongation reaches 7.73 percent, and the purity of the product reaches 99.5 percent;
(8) storing and packaging
The prepared titanium-containing magnesium alloy ingot is packaged by a soft material and stored in a cool and dry place, and the storage temperature is 20 ℃ and the relative humidity is 8 percent, wherein the storage place needs to be waterproof, moistureproof, sun-proof and acid-base salt corrosion-proof.
2. The method for preparing the high-strength titanium-containing cast magnesium alloy according to claim 1, wherein the method comprises the following steps: smelting the titanium-containing magnesium alloy in a vacuum induction smelting furnace, wherein the smelting is completed in the processes of medium-frequency induction heating, vacuumizing, argon bottom blowing and casting forming;
the vacuum induction smelting furnace is vertical, the bottom of the vacuum induction smelting furnace (1) is a furnace base (2), the inside is a furnace chamber (3), the bottom in the furnace chamber (3) is provided with a workbench (6), a smelting crucible (7) is placed on the workbench (6), the outside of the smelting crucible (7) is surrounded by a medium-frequency induction heater (8), and alloy melt (9) is arranged in the smelting crucible (7); an air outlet pipe (4) is arranged at the right upper part of the vacuum induction melting furnace (1) and is controlled by an air outlet valve (5); an argon gas bottle (15) is arranged at the left part of the vacuum smelting furnace (1), an argon gas pipe (16) and an argon gas valve (17) are arranged on the argon gas bottle (15), the argon gas pipe (16) is connected with a bottom blowing motor (11), the bottom blowing motor (11) is connected with a bottom blowing pipe (12), the bottom blowing pipe (12) penetrates through a furnace base (2) and a workbench (6) and is introduced into a smelting crucible (7), and the molten alloy (9) is smelted and bottom blown; a vacuum pump (13) is arranged at the right lower part of the furnace base (2) and is communicated with the furnace chamber (3) through a vacuum pipe (14); an electric cabinet (18) is arranged at the right part of the vacuum induction melting furnace (1), and a display screen (19), an indicator light (20), a power switch (21), an intermediate frequency induction heating regulator (22), a bottom-blowing motor regulator (23) and a vacuum pump regulator (24) are arranged on the electric cabinet (18); the electric cabinet (18) is connected with the medium-frequency induction heater (8) through a first cable (25); the electric cabinet (18) is connected with the bottom blowing motor (11) and the vacuum pump (13) through a second cable (26); the furnace chamber (3) is filled with argon (10); the pressure in the furnace chamber (3) is controlled by an air outlet pipe (4) and an air outlet valve (5).
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