CN117679190A - Titanium-zirconium alloy dental crown sleeve with high corrosion resistance and wear resistance and preparation method thereof - Google Patents
Titanium-zirconium alloy dental crown sleeve with high corrosion resistance and wear resistance and preparation method thereof Download PDFInfo
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- CN117679190A CN117679190A CN202311661442.6A CN202311661442A CN117679190A CN 117679190 A CN117679190 A CN 117679190A CN 202311661442 A CN202311661442 A CN 202311661442A CN 117679190 A CN117679190 A CN 117679190A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
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- 238000005266 casting Methods 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 15
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- 239000002994 raw material Substances 0.000 claims abstract description 11
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- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
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- 238000009835 boiling Methods 0.000 claims description 5
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- 239000007924 injection Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
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- 238000012545 processing Methods 0.000 claims description 5
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000005488 sandblasting Methods 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 1
- 238000005495 investment casting Methods 0.000 abstract description 4
- GGPQWIMALBOMEF-UHFFFAOYSA-N [Ti].[Zr].[Ti] Chemical compound [Ti].[Zr].[Ti] GGPQWIMALBOMEF-UHFFFAOYSA-N 0.000 abstract description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 8
- 229910052719 titanium Inorganic materials 0.000 description 8
- 239000010410 layer Substances 0.000 description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 229910052726 zirconium Inorganic materials 0.000 description 4
- 238000005422 blasting Methods 0.000 description 3
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
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- 239000003513 alkali Substances 0.000 description 2
- 230000001055 chewing effect Effects 0.000 description 2
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- 201000010099 disease Diseases 0.000 description 2
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- FFRBMBIXVSCUFS-UHFFFAOYSA-N 2,4-dinitro-1-naphthol Chemical compound C1=CC=C2C(O)=C([N+]([O-])=O)C=C([N+]([O-])=O)C2=C1 FFRBMBIXVSCUFS-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
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- 229910052709 silver Inorganic materials 0.000 description 1
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- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
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- Dental Prosthetics (AREA)
Abstract
The invention discloses a high corrosion-resistant wear-resistant titanium-zirconium alloy dental crown sleeve which is prepared from the following raw materials in percentage by weight: zr13.00-17.00%, and the balance being Ti and impurity components. The invention also discloses a preparation method of the high corrosion and wear resistant titanium-zirconium alloy dental crown sleeve, which specifically comprises the following steps: (1) weighing; (2) casting; (3) casting; (4) surface treatment. The invention utilizes titanium-zirconium titanium alloy and adopts a precision casting method to produce the dental crown sleeve with high corrosion resistance and wear resistance. The titanium-zirconium alloy has excellent corrosion resistance and mechanical property, ensures the strength and hardness of the material, and greatly prolongs the service life of the titanium alloy crown sleeve by performing wear-resistant treatment on the surface of the precisely cast high-reliability crown sleeve.
Description
Technical Field
The invention relates to the field of biomedical device manufacturing, in particular to a titanium-zirconium alloy crown sleeve with high corrosion resistance and wear resistance and a preparation method thereof.
Background
Dental caries is the most common disease of stomatology, and dental restoration and treatment account for more than 95% of the clinical amount of stomatology. In recent years, titanium and titanium alloy metals have been increasingly used with advances in crown manufacturing technology and advances in dental implant technology.
The chewing surface of the tooth is the place most easily damaged and corroded, and the problem of treating the dental crown disease accounts for the vast majority of the oral outpatient quantity. Dental caries must be repaired after root canal treatment. And crown sets are the most common treatment. From the early noble metal gold and silver as the crown cover to the recent nickel-chromium stainless steel as the crown cover, the process is continuously advanced, and in recent years, pure titanium is widely used.
However, these metal crown cases have problems of insufficient corrosion resistance and poor wear resistance, and stainless steel crown cases have problems of precipitation of heavy metal elements such as metallic odor and chromium. The pure titanium has low strength, low hardness and poor wear resistance, and particularly, the pure titanium crown sleeve has limited service life because of reducing medium generated in the oral cavity during the chewing process of the food. The titanium alloy crown sleeve can ensure the integrity of the original teeth to the greatest extent, and the wall thickness of the titanium alloy crown sleeve is thinner. Generally about 1.0-2.0mm, so the fluidity requirement on the molten metal for casting the titanium alloy is higher, otherwise, the defects of cold shut and casting failure are easy to occur.
The titanium alloy precision casting and shell type manufacturing are key links, because the titanium alloy has very movable chemical properties in a molten state and most refractory materials can be subjected to chemical reaction, the titanium alloy precision casting shell type commonly used in domestic and foreign shapes is difficult to manufacture and has high cost because the refractory materials are all rare earth oxide-yttrium oxide.
Therefore, how to provide a titanium-zirconium alloy crown sleeve with simple method and low cost and high corrosion resistance and wear resistance and a preparation method thereof are technical problems which need to be solved by the technicians in the field.
Disclosure of Invention
In view of the above, the present invention aims to provide a titanium-zirconium alloy crown sleeve with high corrosion resistance and wear resistance and a preparation method thereof, so as to solve the defects in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the titanium-zirconium alloy dental crown sleeve with high corrosion resistance and wear resistance is prepared from the following raw materials in percentage by weight:
zr13.00-17.00%, and the balance being Ti and impurity components.
The titanium alloy composition design of the crown sleeve is determined according to the following principle:
(1) principle of corrosion resistance
Because of the complex and variable corrosive components in the oral cavity, the corrosion resistance of the patent titanium alloy must be prioritized. The corrosion resistance of the titanium matrix is mainly represented by the corrosion resistance of oxidation acid and alkali, and the reduction resistance acid is not ideal; zirconium has excellent reducing acid resistance effect, and the titanium alloy has more comprehensive and complete corrosion resistance by adding a large amount (more than 10 percent) of zirconium into titanium.
(2) Titanium alloy strengthening principle
In order to improve the usability of the medical oral titanium alloy, the strength of the titanium alloy is reinforced by adding solid solution strengthening elements on the basis of pure titanium. Zirconium is infinitely solid-dissolved in titanium and does not produce brittle phases. Meanwhile, the addition of zirconium has little influence on the phase transition point of the titanium alloy, heat treatment strengthening is not needed, and manufacturing procedures are reduced.
Further, the impurity components comprise the following components in percentage by weight: o is less than 0.12%, N is less than 0.002%, H is less than 0.001%, C is less than 0.008%, and Fe is less than 0.05%.
A preparation method of a titanium-zirconium alloy dental crown sleeve with high corrosion resistance and wear resistance comprises the following steps:
(1) Weighing
Weighing the raw materials according to the weight percentage of the high corrosion and wear resistant titanium zirconium alloy crown sleeve to obtain titanium alloy metal;
(2) Casting mould
Extracting dental impression, casting plaster, taking a male mold, 3D scanning to establish a digital model, designing the size and the appearance of a dental crown sleeve, designing a dental crown sleeve wax mold size structure according to the dental crown sleeve size, designing and manufacturing a wax injection mold aluminum alloy mold, digitally processing and manufacturing the aluminum alloy wax mold, injecting a dental crown sleeve wax mold and a casting system model, hanging boron carbide facing sand and back sand on the dental crown sleeve wax mold by using an aluminum sol binder, performing air-cooling drying, boiling and dewaxing, drying at a low temperature by a resistance furnace, sintering at a high temperature, and detecting a dental crown sleeve precisely casting shell for later use;
(3) Casting
Preheating a crown shell type, fixing the shell type in a centrifugal disc of a vacuum suspension induction furnace, adding titanium alloy round bar lump materials into a crucible, closing a furnace door for vacuumizing, feeding power when the vacuum degree reaches more than 3Pa, smelting titanium alloy, refining the titanium alloy, adjusting smelting power, starting the centrifugal disc for rotating, pouring titanium alloy molten metal, smelting and cutting off power, continuing vacuumizing, stopping rotating the centrifugal disc for rotating, cooling to room temperature along with the furnace, breaking vacuum, discharging, removing a pouring system, removing the shell type, detecting a crown shell casting, and performing sand blasting cleaning and grinding on the titanium alloy crown shell for later use;
(4) Surface treatment
The surface treatment comprises surface nitriding treatment or surface carbon single co-permeation treatment;
wherein the surface nitriding treatment comprises: polishing and cleaning the titanium alloy crown sleeve, placing the titanium alloy crown sleeve into a vacuum ion nitriding furnace, carrying out ion nitriding treatment, preserving heat to ensure that the depth of a penetrated layer reaches more than 0.20mm, cooling, discharging, and detecting to obtain a finished product;
the surface carbon single co-permeation treatment comprises the following steps: polishing and cleaning the titanium alloy crown sleeve, placing the titanium alloy crown sleeve into a vacuum ion treatment furnace, performing carbon and nitrogen co-permeation treatment, preserving heat, enabling the depth of a permeation layer to reach more than 0.25mm, cooling, discharging from the furnace, and detecting to obtain a finished product.
The two surface treatment methods can greatly improve the surface hardness and the wear resistance of the titanium alloy crown sleeve, and the service life of the titanium alloy crown sleeve is greatly prolonged due to stronger corrosion resistance of titanium nitride and titanium carbide to acid and alkali.
Further, in the step (2), the granularity of the boron carbide is 120-200 meshes;
further, the aluminum solution adhesive in the step (2) is alumina sol, and the amorphous alumina content is more than 38%.
Further, the low-temperature drying temperature in the step (2) is 200-300 ℃.
Further, the high temperature sintering temperature in step (2) is > 1350 ℃.
Further, the preheating temperature in step (3) is > 400 ℃.
Further, the titanium alloy refining temperature in step (3) is > 1950 ℃.
Further, the rotation speed of the centrifugal disc in the step (3) is 180-200r/min.
Compared with the prior art, the invention has the following beneficial effects:
(1) The preparation method adopts boron carbide (granularity is 120-200 meshes) with high refractoriness (melting point 2350 ℃) and relatively low price as refractory aggregate, adopts alumina sol (amorphous alumina content is more than 38%) as a binder, and is sintered at high temperature to form a precise casting shell, so that the preparation method is used for the first time at home and abroad;
(2) The invention utilizes the titanium-zirconium titanium alloy with intellectual property rights and adopts a precision casting method to produce the crown sleeve with high corrosion resistance and abrasion resistance. The titanium-zirconium alloy has excellent corrosion resistance and mechanical property, ensures the strength and hardness of the material, and greatly prolongs the service life of the titanium alloy crown sleeve by performing wear-resistant treatment on the surface of the precisely cast high-reliability crown sleeve;
(3) The invention adopts a centrifugal casting method to improve the flow speed, and designs a reasonable casting system to ensure that molten metal always fills a cavity in a fast flow state in the casting process, and the cross section area F of a pouring channel is more than F and more than F is more than F;
(4) The invention adopts the self-grinding advanced level smelting furnace, namely the water-cooled copper crucible vacuum suspension induction furnace to smelt the titanium alloy metal liquid for the first time, and has the advantages of adjusting the superheat degree of the titanium alloy metal liquid, effectively controlling the fluidity and crystallization speed of the metal liquid and further controlling the organization and performance of the titanium alloy crown sleeve. The design of sequential solidification is adopted, so that the occlusal surface of the dental crown sleeve is solidified at the bottom of the cavity.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The first upper dental crown sleeve is prepared from the following raw materials in percentage by weight:
13.55% of Zr13.08%, 0.08% of O, 0.001% of N, 0.0008% of H, 0.006% of C, 0.04% of Fe and the balance of Ti.
The preparation method of the dental crown sleeve specifically comprises the following steps:
(1) Weighing
Weighing the raw materials according to the weight percentage of the high corrosion and wear resistant titanium zirconium alloy crown sleeve to obtain titanium alloy metal;
(2) Casting mould
Extracting dental impression by dentists, casting plaster to obtain a male mold, establishing a digital model by 3D scanning, designing the size and the shape of a dental crown sleeve wax mold according to the size of the dental crown sleeve, designing and manufacturing a wax injection mold aluminum alloy mold, namely, digitally processing and manufacturing the aluminum alloy wax mold, injecting the dental crown sleeve wax mold and a casting system model, reversely multiplexing an aluminum sol binder to hang boron carbide facing sand and back sand by the dental crown sleeve wax mold, carrying out air cooling drying, boiling and dewaxing, drying at a low temperature (290 ℃) of a resistance furnace, sintering at a high temperature (1370 ℃) and precisely casting a shell type of the dental crown sleeve for detection and standby;
(3) Casting
Preheating a crown shell (410 ℃), fixing a shell by placing a centrifugal disc of a vacuum suspension induction furnace, adding a titanium alloy round bar lump material into a crucible, closing a furnace door for vacuumizing, feeding power when the vacuum degree reaches more than 3Pa, smelting titanium alloy by adding power, refining titanium alloy (1960 ℃), adjusting smelting power, starting the rotation of the centrifugal disc (180 revolutions per minute), pouring titanium alloy molten metal, smelting and cutting off power, continuing vacuumizing, stopping rotating the centrifugal disc, cooling to room temperature along with the furnace, breaking vacuum, discharging, removing a pouring system, removing the shell, detecting a crown casting, blasting sand, cleaning and coping the titanium alloy crown casting for standby
(4) Surface nitriding treatment
Polishing and cleaning the titanium alloy dental crown sleeve, placing the titanium alloy dental crown sleeve into a vacuum ion nitriding furnace, carrying out ion nitriding treatment, preserving heat, enabling the depth of a penetrated layer to reach more than 0.20mm, cooling, discharging, and detecting to obtain a golden yellow surface finished product.
Example 2
The second lower dental crown sleeve is prepared from the following raw materials in percentage by weight:
zr15.00%, O0.10%, N0.0015%, H0.0009%, C0.007%, fe < 0.048% and the balance Ti.
The preparation method of the dental crown sleeve specifically comprises the following steps:
(1) Weighing
Weighing the raw materials according to the weight percentage of the high corrosion and wear resistant titanium zirconium alloy crown sleeve to obtain titanium alloy metal;
(2) Casting mould
Extracting dental impression by dentists, casting plaster to obtain a male mold, establishing a digital model by 3D scanning, designing the size and the shape of a dental crown sleeve wax mold according to the size of the dental crown sleeve, designing and manufacturing a wax injection mold aluminum alloy mold, namely, digitally processing and manufacturing the aluminum alloy wax mold, injecting the dental crown sleeve wax mold and a casting system model, reversely multiplexing an aluminum sol binder to hang boron carbide facing sand and back sand by the dental crown sleeve wax mold, carrying out air cooling drying, boiling and dewaxing, drying in a resistance furnace at a low temperature (290 ℃), sintering at a high temperature (1360 ℃), and precisely casting a shell for detection of the dental crown sleeve for standby;
(3) Casting
Preheating a crown shell (450 ℃), fixing a shell by placing the shell into a vacuum suspension induction furnace centrifugal disc, adding titanium alloy round bar blocks into a crucible, closing a furnace door for vacuumizing, feeding power when the vacuum degree reaches more than 3Pa, smelting titanium alloy by feeding power, refining titanium alloy (temperature 1960 ℃), adjusting smelting power, starting the rotation of the centrifugal disc (190 revolutions per minute), pouring titanium alloy molten metal, smelting and cutting off power, continuing vacuumizing, stopping rotating the centrifugal disc, cooling to room temperature along with the furnace, breaking vacuum, discharging, removing a pouring system, removing the shell, detecting a crown sleeve casting, blasting sand, cleaning and coping the titanium alloy crown sleeve for standby
(4) The surface carbon single co-permeation treatment comprises
Polishing and cleaning the titanium alloy dental crown sleeve, placing the titanium alloy dental crown sleeve into a vacuum ion treatment furnace, performing carbon and nitrogen co-permeation treatment, preserving heat, enabling the depth of a permeation layer to reach more than 0.25mm, cooling, discharging, and detecting to obtain a light golden surface finished product.
Example 3
The second lower occlusion tooth crown sleeve is prepared from the following raw materials in percentage by weight:
16.10% of Zr16.11%, 0.11% of O, 0.0018% of N, 0.0019% of H, 0.007% of C, 0.045% of Fe and the balance of Ti.
The preparation method of the dental crown sleeve specifically comprises the following steps:
(1) Weighing
Weighing the raw materials according to the weight percentage of the high corrosion and wear resistant titanium zirconium alloy crown sleeve to obtain titanium alloy metal;
(2) Casting mould
Extracting dental impression by dentists, casting plaster to obtain a male mold, establishing a digital model by 3D scanning, designing the size and the shape of a dental crown sleeve wax mold according to the size of the dental crown sleeve, designing and manufacturing a wax injection mold aluminum alloy mold, namely, digitally processing and manufacturing the aluminum alloy wax mold, injecting the dental crown sleeve wax mold and a casting system model, reversely multiplexing an aluminum sol binder to hang boron carbide facing sand and back sand, carrying out air cooling drying, boiling and dewaxing, drying in a resistance furnace at a low temperature (300 ℃), sintering at a high temperature (1360 ℃), and precisely casting a dental crown sleeve shell for detection and standby;
(3) Casting
Preheating a crown shell (480 ℃), fixing a shell by placing the shell into a centrifugal disc of a vacuum suspension induction furnace, adding titanium alloy round bar blocks into a crucible, closing a furnace door for vacuumizing, feeding power when the vacuum reaches more than 3Pa, smelting titanium alloy by adding power, refining titanium alloy (temperature 1960 ℃), adjusting smelting power, starting the rotation of the centrifugal disc (190 rpm), pouring titanium alloy molten metal, smelting and cutting off power, continuing vacuumizing, stopping rotating the centrifugal disc, cooling to room temperature along with the furnace, breaking vacuum, discharging, removing a pouring system, removing the shell, detecting a crown sleeve casting, blasting sand, cleaning and coping the titanium alloy crown sleeve for standby
(4) Surface nitriding treatment
Polishing the titanium alloy dental crown sleeve to remove the golden surface layer on the side surface of the dental crown sleeve with the thickness of 0.01mm, exposing the metallic luster of the titanium alloy, cleaning, placing into a vacuum ion nitriding furnace, carrying out ion nitriding treatment, preserving heat, enabling the depth of a seeping layer to reach more than 0.20mm, and cooling and discharging to obtain a golden surface finished product.
Performance testing
Hardness of
Taking the finished dental crown sleeve products prepared in examples 1-3, and respectively measuring the hardness of the finished dental crown sleeve products;
the results are shown in Table 1:
TABLE 1
| Project | Example 1 | Example 2 | Example 3 |
| Occlusal surface hardness/HRC | 51 | 55 | 53 |
| Matrix hardness/HRC | 29 | 30 | 31 |
Corrosion resistance
The finished crown cases of examples 1-3 were immersed in 9℃acetin, 3% saline, 2% sulfuric acid, 3% hydrochloric acid, and 36-38℃for 30 days, respectively, without any signs of corrosion on the crown case surface.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The titanium-zirconium alloy dental crown sleeve with high corrosion resistance and wear resistance is characterized by being prepared from the following raw materials in percentage by weight:
zr13.00-17.00%, and the balance being Ti and impurity components.
2. The high corrosion and wear resistant titanium zirconium alloy crown cap of claim 1 wherein the impurity content is by weight percent: o is less than 0.12%, N is less than 0.002%, H is less than 0.001%, C is less than 0.008%, and Fe is less than 0.05%.
3. The preparation method of the titanium-zirconium alloy dental crown sleeve with high corrosion resistance and wear resistance is characterized by comprising the following steps of:
(1) Weighing
Weighing all raw materials according to the weight percentage of the high corrosion and wear resistant titanium-zirconium alloy crown sleeve in claim 2 to obtain titanium alloy metal;
(2) Casting mould
Extracting dental impression, casting plaster, taking a male mold, 3D scanning to establish a digital model, designing the size and the appearance of a dental crown sleeve, designing a dental crown sleeve wax mold size structure according to the dental crown sleeve size, designing and manufacturing a wax injection mold aluminum alloy mold, digitally processing and manufacturing the aluminum alloy wax mold, injecting a dental crown sleeve wax mold and a casting system model, hanging boron carbide facing sand and back sand on the dental crown sleeve wax mold by using an aluminum sol binder, performing air-cooling drying, boiling and dewaxing, drying at a low temperature by a resistance furnace, sintering at a high temperature, and detecting a dental crown sleeve precisely casting shell for later use;
(3) Casting
Preheating a crown shell type, fixing the shell type in a centrifugal disc of a vacuum suspension induction furnace, adding titanium alloy round bar lump materials into a crucible, closing a furnace door for vacuumizing, feeding power when the vacuum degree reaches more than 3Pa, smelting titanium alloy, refining the titanium alloy, adjusting smelting power, starting the centrifugal disc for rotating, pouring titanium alloy molten metal, smelting and cutting off power, continuing vacuumizing, stopping rotating the centrifugal disc for rotating, cooling to room temperature along with the furnace, breaking vacuum, discharging, removing a pouring system, removing the shell type, detecting a crown shell casting, and performing sand blasting cleaning and grinding on the titanium alloy crown shell for later use;
(4) Surface treatment
The surface treatment comprises surface nitriding treatment or surface carbon single co-permeation treatment;
wherein the surface nitriding treatment comprises: polishing and cleaning the titanium alloy crown sleeve, placing the titanium alloy crown sleeve into a vacuum ion nitriding furnace, carrying out ion nitriding treatment, preserving heat to ensure that the depth of a penetrated layer reaches more than 0.20mm, cooling, discharging, and detecting to obtain a finished product;
the surface carbon single co-permeation treatment comprises the following steps: polishing and cleaning the titanium alloy crown sleeve, placing the titanium alloy crown sleeve into a vacuum ion treatment furnace, performing carbon and nitrogen co-permeation treatment, preserving heat, enabling the depth of a permeation layer to reach more than 0.25mm, cooling, discharging from the furnace, and detecting to obtain a finished product.
4. A method for producing a titanium-zirconium alloy crown sheath with high corrosion resistance and wear resistance according to claim 3, wherein the boron carbide particle size in the step (2) is 120-200 mesh.
5. The method for preparing a high corrosion and wear resistant titanium zirconium alloy crown shell according to claim 3, wherein the aluminum solution adhesive in the step (2) is alumina sol, and the amorphous alumina content is more than 38%.
6. The method for preparing a titanium-zirconium alloy dental crown sheath with high corrosion resistance and wear resistance according to claim 3, wherein the low-temperature drying temperature in the step (2) is 200-300 ℃.
7. A method of preparing a titanium-zirconium alloy dental crown having high corrosion and wear resistance as claimed in claim 3, wherein the high temperature sintering temperature in step (2) is > 1350 ℃.
8. A method of preparing a titanium zirconium alloy crown of high corrosion and wear resistance as claimed in claim 3 wherein the preheating temperature in step (3) is > 400 ℃.
9. A method of preparing a highly corrosion and wear resistant titanium zirconium alloy crown shell as claimed in claim 3 wherein the titanium alloy refining temperature in step (3) is > 1950 ℃.
10. The method for preparing a titanium-zirconium alloy dental crown sheath with high corrosion resistance and wear resistance according to claim 3, wherein the rotation speed of the centrifugal disk in the step (3) is 180-200r/min.
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