CN112176235A - Molybdenum alloy and preparation method thereof - Google Patents
Molybdenum alloy and preparation method thereof Download PDFInfo
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- 229910001182 Mo alloy Inorganic materials 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title abstract description 11
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 55
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 23
- 239000011733 molybdenum Substances 0.000 claims abstract description 22
- 238000000498 ball milling Methods 0.000 claims description 45
- 239000000843 powder Substances 0.000 claims description 35
- 238000005245 sintering Methods 0.000 claims description 32
- 229910000568 zirconium hydride Inorganic materials 0.000 claims description 29
- QSGNKXDSTRDWKA-UHFFFAOYSA-N zirconium dihydride Chemical compound [ZrH2] QSGNKXDSTRDWKA-UHFFFAOYSA-N 0.000 claims description 27
- 238000002156 mixing Methods 0.000 claims description 26
- 238000003825 pressing Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 15
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 12
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000011863 silicon-based powder Substances 0.000 claims description 11
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000137 annealing Methods 0.000 claims description 3
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 229910052727 yttrium Inorganic materials 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- 239000001301 oxygen Substances 0.000 claims 1
- 238000012805 post-processing Methods 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims 1
- 239000011521 glass Substances 0.000 abstract description 18
- 238000001953 recrystallisation Methods 0.000 abstract description 9
- 238000002844 melting Methods 0.000 abstract description 8
- 230000008018 melting Effects 0.000 abstract description 8
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 239000000156 glass melt Substances 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 5
- 238000007254 oxidation reaction Methods 0.000 abstract description 5
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 238000011049 filling Methods 0.000 description 5
- 238000004321 preservation Methods 0.000 description 5
- 238000012216 screening Methods 0.000 description 5
- 239000005361 soda-lime glass Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000008247 solid mixture Substances 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
-
- 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
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/045—Alloys based on refractory metals
-
- 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
- C22F1/16—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of other metals or alloys based thereon
- C22F1/18—High-melting or refractory metals 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)
- Powder Metallurgy (AREA)
Abstract
The invention relates to a molybdenum alloy, which comprises the components of 0.5-5.0% of Zr, 0.01-0.2% of Y, 0.05-0.3% of B, 0.05-0.2% of Si, 0.19-1.89% of O and 92.41-99.20% of Mo. The invention also relates to a preparation method of the molybdenum alloy. The molybdenum alloy prepared by the invention has high recrystallization temperature, good high-temperature strength and strong oxidation resistance and corrosion resistance, is used as a glass melting electrode, has the service life prolonged by more than 30 percent compared with a pure molybdenum electrode, and doped alloy elements can not pollute glass melt, can not color glass, and is beneficial to ensuring the quality of the glass.
Description
Technical Field
The invention belongs to the technical field of material preparation, and particularly relates to a molybdenum alloy and a preparation method thereof.
Background
The molybdenum has the advantages of higher melting point, excellent high-temperature creep resistance, good heat conduction and electrical conductivity, small thermal expansion coefficient and specific heat capacity, high-temperature strength and the like, has good wettability when contacting with glass melt, and low contact resistance, and is an ideal material for heating electrodes for melting glass.
In recent years, along with the continuous attention of the glass manufacturing industry to the electric melting technology and the enhancement of environmental protection, the glass melting mode is gradually changed from traditional flame heating to all-electric melting heating; meanwhile, the development of the glass industry and the large application of high-quality optical glass also put new demands on the molybdenum electrode. The high-temperature strength and the recrystallization temperature of the pure molybdenum electrode are relatively low, high-temperature creep deformation is easy to occur after long-time service to generate overhang bending, the corrosion resistance of the pure molybdenum electrode is poor, the pure molybdenum electrode is easy to corrode after being contacted with a glass melt for a long time, and the service life is short. In some special glass production kilns, the service life of a pure molybdenum electrode is less than half a year, and the pure molybdenum electrode can not meet the industrial requirements gradually, so that the development of a novel molybdenum alloy for prolonging the service life of a glass melting electrode is urgently needed.
Disclosure of Invention
The invention aims to provide a molybdenum alloy, which solves the problems of poor corrosion resistance, short service life, high temperature oxidation tendency and the like of the existing pure molybdenum electrode.
In order to solve the technical problems, the invention provides a molybdenum alloy which comprises the following components in percentage by mass: 0.5 to 5.0 percent of Zr, 0.01 to 0.2 percent of Y, 0.05 to 0.3 percent of B, 0.05 to 0.2 percent of Si, 0.19 to 1.89 percent of O and 92.41 to 99.20 percent of Mo.
The second purpose of the invention is to provide a preparation method of the molybdenum alloy, which comprises the following steps:
s1 ball milling
And (3) putting zirconium hydride powder and yttrium oxide powder into a ball milling tank, carrying out mechanical ball milling, and sieving to obtain doped zirconium hydride powder. The ratio of zirconium hydride to yttrium oxide is 20-50: 1.
S2, mixing
And adding pure molybdenum powder, doped zirconium hydride powder, silicon powder and boron powder into a mixer for mixing to obtain the doped molybdenum powder. The raw materials comprise the following components in percentage by mass: 0.53-5.36% of doped zirconium hydride powder, 0.05-0.3% of boron powder, 0.05-0.2% of silicon powder and the balance of molybdenum powder.
S3, pressing
And pressing the doped molybdenum powder into a compact.
S4, sintering
And sintering and cooling the pressed compact to obtain the molybdenum alloy.
Another method for preparing the molybdenum alloy is to add step S5
And S5, plastic working and annealing the molybdenum alloy obtained in the step S4 as a blank to obtain the required molybdenum alloy.
The molybdenum alloy ZrH provided by the invention2Added as a dispersed phase into the molybdenum alloy, and a small amount of Y is added at the same time2O3To ZrH2Modified to form stable tetragonal phase ZrO after sintering2To prevent ZrO2Crystal form transformation occurs at about 1000 ℃, so that the toughness, plasticity and corrosion resistance of the molybdenum alloy are ensured; the addition of a small amount of Si and B in the alloy is beneficial to improving the oxidation resistance of the molybdenum alloy. Through the synergistic effect of the components, the corrosion resistance and the oxidation resistance of the molybdenum alloy can be further improved while the high-temperature strength and the recrystallization temperature of the molybdenum alloy are improved.
The molybdenum alloy prepared by the invention has the advantages of recrystallization temperature higher than 1250 ℃, good high-temperature strength, strong oxidation resistance and corrosion resistance, service life of the molybdenum alloy used as a glass melting electrode is improved by more than 50 percent compared with that of a pure molybdenum electrode, doped alloy elements can not pollute glass melt, can not color glass, and is beneficial to ensuring the quality of the glass.
Further improvement, the ball milling time of the step S1 is 8-15h, the ball milling rotation speed is 150-. The yttrium oxide is a trace element, and a solid-solid mixture of zirconium hydride and yttrium oxide is uniformly mixed by a proper ball milling process, the particle size is proper, the modification effect of yttrium oxide on zirconium hydride can be controlled, and the sintered molybdenum alloy has better comprehensive performance.
Further improvement, the rotating speed of the mixer is 20-30r/min in the mixing process, and the mixing time is 8-16 h. Suitable mixing techniques result in a homogeneous mixture of the solid-solid mixtures of the components.
Compared with other methods, the method has the advantages of simple process, high efficiency and easy realization of industrial production. The components are doped in a solid-solid mixing mode, the operation is simple, no pollution is caused, the obtained molybdenum alloy electrode has uniform components and long service life, and the proportions of the components of the alloy can be finely adjusted according to different types of glass melts, so that the molybdenum electrode can exert the best performance.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following 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.
The purity of the pure molybdenum powder used in the following examples was not less than 99.95%.
In the following examples, the apparatus for detecting the contents of the components of the molybdenum alloy employs an inductively coupled plasma spectrometer and an oxygen-nitrogen-hydrogen joint analyzer, and the prepared molybdenum alloy is suitable for use in a molybdenum alloy electrode for a glass kiln.
Example 1
A preparation method of a molybdenum alloy specifically comprises the following steps:
first step ball milling
ZrH with the mass ratio of 36.5:12Powder and Y2O3And putting the powder into a ball milling tank for ball milling, wherein the ball-material ratio is 1.5:1, the rotating speed of the ball mill is 150r/min, and the ball milling time is 15 h. And (4) screening after ball milling to obtain doped zirconium hydride powder.
The second step of mixing
29.81Kg of pure molybdenum powder, 157.5g of doped zirconium hydride powder obtained in the first step, 15g of silicon powder and 15g of boron powder are added into a mixer for mixing. The rotating speed of the V-shaped mixer is 25r/min, and the mixing time is 10h, so that the doped molybdenum powder is obtained.
Third step of pressing and sintering
And (3) filling the molybdenum powder doped in the second step into a rubber sleeve, and pressing by using an isostatic press, wherein the pressing pressure is 180MPa, and the pressure maintaining time is 3 min. Sintering the pressed blank by using an intermediate frequency furnace after pressing is finished, wherein the sintering process adopts hydrogen protection, the sintering temperature is 1960 ℃, the heat preservation time is 7 hours, and the pressed blank is cooled to room temperature along with the furnace after sintering is finished to obtain a molybdenum alloy rod blank with the density of 9.65g/cm3。
The molybdenum alloy comprises the following components in percentage by mass: 0.500% of Zr, 0.011% of Y, 0.051% of B, 0.050% of Si, 0.193% of O and 99.195% of Mo.
And fourthly, performing plastic processing and annealing on the molybdenum alloy blank to obtain the required molybdenum alloy.
The recrystallization temperature of the molybdenum alloy prepared by the embodiment is 1300 ℃, the room-temperature tensile strength is 726.7MPa, and the elongation is 7.8%. The sample of the embodiment is oxidized and weighted 87.8 percent of that of the pure molybdenum sample in the air at 500 ℃, and after the soda-lime glass at 1500 ℃ is eroded for 24 hours, the content of molybdenum element in the glass is 68.2 percent of that of the pure molybdenum sample.
Example 2
The preparation method of the molybdenum alloy is different from the embodiment 1 and specifically comprises the following steps:
first step ball milling
ZrH with the mass ratio of 25:12Powder and Y2O3And putting the powder into a ball milling tank for ball milling, wherein the ball-material ratio is 3:1, the ball milling rotation speed is 150r/min, and the ball milling time is 8 h. And (4) screening after ball milling to obtain doped zirconium hydride powder.
The second step of mixing
28.88Kg of pure molybdenum powder, 970g of doped zirconium hydride powder obtained in the first step, 60g of silicon powder and 90g of boron powder are added into a V-shaped mixer for mixing. The rotating speed of the V-shaped mixer is 30r/min, and the mixing time is 8h, so that the doped molybdenum powder is obtained.
Third step of pressing and sintering
And (3) filling the molybdenum powder doped in the second step into a rubber sleeve, and pressing by using an isostatic press, wherein the pressing pressure is 200MPa, and the pressure maintaining time is 5 min. Sintering the pressed blank by using an intermediate frequency furnace after pressing is finished, wherein the sintering process adopts hydrogen protection, the sintering temperature is 2010 ℃, the heat preservation time is 6 hours, and the pressed blank is cooled to room temperature along with the furnace after sintering is finished to obtain a molybdenum alloy rod blank with the density of 9.62g/cm3。
The components of the molybdenum alloy are measured as follows: 3.048% of Zr, 0.098% of Y, 0.299% of B, 0.200% of Si, 1.142% of O and 95.213% of Mo.
The molybdenum alloy prepared by the embodiment has the recrystallization temperature of 1550 ℃, the room-temperature tensile strength of 811.3MPa and the elongation of 5.4%. The sample of the embodiment is oxidized and weighted in the air at 500 ℃ to 44.2 percent of that of the pure molybdenum sample, and after the soda-lime glass at 1500 ℃ is eroded for 24 hours, the content of molybdenum element in the glass is 46.7 percent of that of the pure molybdenum sample.
Example 3
The preparation method of the molybdenum alloy is different from the embodiment 2 and specifically comprises the following steps: first step ball milling
ZrH with the mass ratio of 25:12Powder and Y2O3And putting the powder into a ball milling tank for ball milling, wherein the ball-material ratio is 2:1, the ball milling rotation speed is 200r/min, and the ball milling time is 9 h. And (4) screening after ball milling to obtain doped zirconium hydride powder.
The second step of mixing
29.03Kg of pure molybdenum powder, 970g of doped zirconium hydride powder obtained in the first step, 15g of silicon powder and 15g of boron powder are added into a V-shaped mixer for mixing. The rotating speed of the V-shaped mixer is 25r/min, and the mixing time is 16h, so that the doped molybdenum powder is obtained.
Third step of pressing and sintering
And (3) filling the molybdenum powder doped in the second step into a rubber sleeve, and pressing by using an isostatic press, wherein the pressing pressure is 180MPa, and the pressure maintaining time is 5 min. Sintering the pressed blank by using an intermediate frequency furnace after pressing is finished, wherein the sintering process adopts hydrogen protection, the sintering temperature is 1980 ℃, the heat preservation time is 7 hours, and the pressed blank is cooled to room temperature along with the furnace after sintering is finished to obtain a molybdenum alloy bar blank with the density of 9.60g/cm3。
The components of the molybdenum alloy are measured as follows: 3.045% of Zr, 0.097% of Y, 0.052% of B, 0.051% of Si, 1.133% of O and 95.622% of Mo.
The molybdenum alloy prepared by the embodiment has the recrystallization temperature of 1450 ℃, the room-temperature tensile strength of 785.3MPa and the elongation of 6.2 percent. The sample of the embodiment is oxidized and weighted to 80.5 percent of that of the pure molybdenum sample in the air at 500 ℃, and after the soda-lime glass at 1500 ℃ is eroded for 24 hours, the content of molybdenum element in the glass is 48.6 percent of that of the pure molybdenum sample.
Example 4
The preparation method of the molybdenum alloy is different from the embodiment 1 and specifically comprises the following steps:
first step ball milling
The mass ratio is50:1 ZrH2Powder and Y2O3And putting the powder into a ball milling tank for ball milling, wherein the ball-material ratio is 1:1, the ball milling rotation speed is 250r/min, and the ball milling time is 12 h. And (4) screening after ball milling to obtain doped zirconium hydride powder.
The second step of mixing
28.91Kg of pure molybdenum powder, 938g of doped zirconium hydride powder obtained in the first step, 60g of silicon powder and 90g of boron powder are added into a V-shaped mixer for mixing. The rotating speed of the V-shaped mixer is 24r/min, and the mixing time is 12h, so that the doped molybdenum powder is obtained.
Third step of pressing and sintering
And (3) filling the molybdenum powder doped in the second step into a rubber sleeve, and pressing by using an isostatic press, wherein the pressing pressure is 200MPa, and the pressure maintaining time is 5 min. Sintering the pressed blank by using an intermediate frequency furnace after pressing is finished, wherein the sintering process adopts hydrogen protection, the sintering temperature is 2000 ℃, the heat preservation time is 6 hours, and the pressed blank is cooled to room temperature along with the furnace after sintering is finished to obtain a molybdenum alloy rod blank with the density of 9.67g/cm3。
The components of the molybdenum alloy are measured as follows: 3.005% of Zr, 0.048% of Y, 0.298% of B, 0.200% of Si, 1.132% of O and 95.317% of Mo.
The recrystallization temperature of the molybdenum alloy prepared by the embodiment is 1500 ℃, the room-temperature tensile strength is 795.8MPa, and the elongation is 5.7%. The sample of the embodiment is oxidized and weighted 47.6 percent of that of the pure molybdenum sample in the air at 500 ℃, and after the soda-lime glass at 1500 ℃ is eroded for 24 hours, the content of molybdenum element in the glass is 56.4 percent of that of the pure molybdenum sample.
Example 5
The preparation method of the molybdenum alloy is different from the embodiment 1 and specifically comprises the following steps:
first step ball milling
ZrH with the mass ratio of 20:12Powder and Y2O3And putting the powder into a ball milling tank for ball milling, wherein the ball-material ratio is 2.5:1, the ball milling rotation speed is 200r/min, and the ball milling time is 8 h. And (4) screening after ball milling to obtain doped zirconium hydride powder.
The second step of mixing
28.24Kg of pure molybdenum powder, 1608g of doped zirconium hydride powder obtained in the first step, 60g of silicon powder and 90g of boron powder were added to a V-shaped mixer and mixed. The rotating speed of the V-shaped mixer is 20r/min, and the mixing time is 16h, so that the doped molybdenum powder is obtained.
Third step of pressing and sintering
And (3) filling the molybdenum powder doped in the second step into a rubber sleeve, and pressing by using an isostatic press, wherein the pressing pressure is 200MPa, and the pressure maintaining time is 5 min. Sintering the pressed blank by using an intermediate frequency furnace after pressing is finished, wherein the sintering process adopts hydrogen protection, the sintering temperature is 2050 ℃, the heat preservation time is 7 hours, and the pressed blank is cooled to room temperature along with the furnace after sintering is finished to obtain a molybdenum alloy bar blank with the density of 9.45g/cm3。
The components of the molybdenum alloy are measured as follows: 4.980% of Zr, 0.200% of Y, 0.297% of B, 0.198% of Si, 1.887% of O and 92.438% of Mo.
The molybdenum alloy prepared by the embodiment has the recrystallization temperature of 1650 ℃, the room-temperature tensile strength of 846.6MPa and the elongation of 4.3 percent. The sample of the embodiment is oxidized and weighted to 62.7 percent of that of the pure molybdenum sample in the air at 500 ℃, and after the soda-lime glass at 1500 ℃ is eroded for 24 hours, the content of the molybdenum element in the glass is 33.7 percent of that of the pure molybdenum sample.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention. The invention is not limited to the foregoing embodiments. The invention also extends to any novel feature or any novel combination of features disclosed in this specification, or in the claims, or to any novel method or process steps or any novel combination of steps disclosed.
Claims (7)
1. The molybdenum alloy is characterized by comprising the following components in percentage by mass: zirconium 0.5-5.0%, yttrium 0.01-0.2%, boron 0.05-0.3%, silicon 0.05-0.2%, oxygen 0.19-1.89%, molybdenum 92.41-99.20%.
2. A method for preparing the molybdenum alloy of claim 1, comprising the steps of:
s1 ball milling
Putting zirconium hydride powder and yttrium oxide powder into a ball milling tank for ball milling, and sieving to obtain doped zirconium hydride powder, wherein the ratio of zirconium hydride to yttrium oxide is 20-50:1;
s2, mixing
Adding pure molybdenum powder, doped zirconium hydride powder, silicon powder and boron powder into a mixer for mixing to obtain doped molybdenum powder, wherein the mass percentage ratio of the raw materials is as follows: doped zirconium hydride powder 0.53-5.36%, boron powder 0.05-0.3%, silicon powder 0.05-0.2%, and the rest is molybdenum powder;
s3, pressing
Pressing the doped molybdenum powder into a pressed compact;
s4, sintering
And sintering and cooling the pressed compact to obtain the molybdenum alloy.
3. The method for producing a molybdenum alloy according to claim 1,
s1 ball milling
Putting zirconium hydride powder and yttrium oxide powder into a ball milling tank for ball milling, and sieving to obtain doped zirconium hydride powder, wherein the ratio of zirconium hydride to yttrium oxide is 20-50:1;
s2, mixing
Adding pure molybdenum powder, doped zirconium hydride powder, silicon powder and boron powder into a mixer for mixing to obtain doped molybdenum powder, wherein the mass percentage ratio of the raw materials is as follows: doped zirconium hydride powder 0.53-5.36%, boron powder 0.05-0.3%, silicon powder 0.05-0.2%, and the rest is molybdenum powder;
s3, pressing
Pressing the doped molybdenum powder into a pressed compact;
s4, sintering
Sintering and cooling the pressed compact to obtain a molybdenum alloy blank;
s5, post-processing
And (5) performing plastic working and annealing on the molybdenum alloy blank obtained in the step S4 to obtain the required molybdenum alloy.
4. The method for producing a molybdenum alloy according to claim 2,
step S1, the ball milling time is 8-15h, the ball milling speed is 150-.
5. The method for producing a molybdenum alloy as claimed in claim 3,
step S1, the ball milling time is 8-15h, the ball milling speed is 150-.
6. The method for producing a molybdenum alloy according to claim 2,
and step S2, the rotating speed of the mixer is 20-30r/min, and the mixing time is 8-16 h.
7. The method for producing a molybdenum alloy according to claim 3,
and step S2, the rotating speed of the mixer is 20-30r/min, and the mixing time is 8-16 h.
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| CN202010958909.3A CN112176235A (en) | 2020-09-14 | 2020-09-14 | Molybdenum alloy and preparation method thereof |
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