CN217383746U - Device for induction melting of titanium and titanium alloy with self-lining function - Google Patents
Device for induction melting of titanium and titanium alloy with self-lining function Download PDFInfo
- Publication number
- CN217383746U CN217383746U CN202220256844.2U CN202220256844U CN217383746U CN 217383746 U CN217383746 U CN 217383746U CN 202220256844 U CN202220256844 U CN 202220256844U CN 217383746 U CN217383746 U CN 217383746U
- Authority
- CN
- China
- Prior art keywords
- crucible
- furnace
- fan
- titanium
- furnace tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
The utility model relates to a non ferrous metal processing technology field, specifically speaking relates to a device of titanium and titanium alloy is smelted in response with from furnace lining function. The device comprises a furnace shell and a crucible, wherein an induction furnace power supply, a furnace tilting device and a vacuum and back-flushing argon system are arranged on the outer wall of the furnace shell, a casting mold is arranged on the inner wall of the bottom of the furnace shell, a centrifugal casting machine is arranged at the bottom of the casting mold, and in the device for induction melting of titanium and titanium alloy with the self-lining function, a plurality of mutually insulated fan-shaped tubes are spliced to form the crucible through the arranged crucible, an induction current loop on the crucible is cut off, the current skin effect on the crucible is eliminated, so that the melting power is mainly concentrated on titanium and titanium alloy furnace burden, and a layer of metal skull lining can be formed on the inner surface of the crucible, so that the problems of low induction melting electrical efficiency, incapability of a melting process and large pollution of the crucible and refractory furnace lining on titanium alloy liquid are solved.
Description
Technical Field
The utility model relates to a non ferrous metal processing technology field, specifically speaking relates to a device of titanium and titanium alloy is smelted in response with from furnace lining function.
Background
Titanium is refractory active metal, the melting point is 1668 ℃, the melting temperature is generally 1800-2000 ℃, and titanium alloy can not be melted by adopting general fuel and a heating method. The common refractory material furnace lining is metal oxides such as Al2O3, MgO, SiO2, CaO, ZrO and the like, and the oxides can be softened and easily decomposed under the high-temperature and vacuum condition of more than 1700 ℃, so that the service life of the refractory furnace lining is reduced, even the refractory furnace lining is collapsed integrally, the decomposition products of oxygen and metallic aluminum, zirconium and the like can pollute molten metal of titanium and titanium alloy, and the decomposition reaction formula of the oxides is as follows:
under high temperature, titanium has extremely strong chemical activity, can deprive oxygen from refractory material furnace lining oxide, reduces the service life of the refractory furnace lining, and influences the quality of ingot casting products.
Under the condition of high temperature, aluminum in the alloy can perform a displacement reaction with a magnesium oxide furnace lining, generated magnesium metal is evaporated, the displacement reaction is accelerated, the furnace lining loss is accelerated, the service life of the refractory furnace lining is reduced, and the loss of the alloy element aluminum is increased.
Under the conditions of high temperature, vacuum and the like, a furnace lining of a refractory material can be softened and decomposed, titanium and alloy elements can also have violent replacement reaction with the oxide of the furnace lining, so that molten metal can be absorbed by oxygen to pollute a titanium melt, and a common smelting device and a common refractory furnace lining cannot contain liquid metal titanium and cannot be smelted to obtain a qualified ingot.
When the electric arc furnace is adopted to smelt titanium and titanium alloy, the volatilization loss of alloy elements with low melting point and high vapor pressure is large, so that the production cost is increased, and the control of alloy components is difficult; the molten pool of the electric arc melting is very shallow, the time for maintaining the alloy in the high temperature period is very short, high-density and low-density impurities are solidified into the ingot without separating, and the quality of the ingot cannot be effectively ensured.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device of titanium and titanium alloy is smelted in response with from furnace wall function to solve the problem that provides in the above-mentioned background art.
For realizing the above-mentioned mesh, the utility model provides a device of titanium and titanium alloy is smelted in response with from furnace wall function, including stove outer wall and crucible, stove outer wall is provided with the induction furnace power, inclines the stove device and vacuum and recoil argon gas system, stove outer wall bottom inner wall is provided with the mould, the bottom of mould is provided with centrifugal casting machine, the top of stove outer wall is provided with the response and smelts device and furnace temperature detection control system, the crucible sets up in the stove outer wall, be provided with the stove pipe fitting in the crucible, be provided with the insulating part in the stove pipe fitting, the crucible outer wall is provided with the crucible induction coil, the one end of crucible induction coil is provided with induction coil and advances the electric water inlet, and the other end is provided with induction coil and goes out the electric delivery port, and the crucible includes the crucible bottom, be provided with from the living furnace wall in the crucible.
As a further improvement of the technical scheme, the furnace tube part comprises a first fan-shaped crucible furnace tube, a second fan-shaped crucible furnace tube, a third fan-shaped crucible furnace tube, a fourth fan-shaped crucible furnace tube, a fifth fan-shaped crucible furnace tube and a sixth fan-shaped crucible furnace tube, the insulating part comprises a second ceramic insulating layer, a third ceramic insulating layer, a fourth ceramic insulating layer and a fifth ceramic insulating layer, each insulating part is arranged in the furnace tube part, the first fan-shaped crucible furnace tube is provided with a first fan-shaped crucible furnace tube water inlet, the bottom of the crucible bottom is provided with a first fan-shaped crucible furnace tube water outlet which is connected with the first fan-shaped crucible furnace tube water inlet, the crucible bottom is also provided with a radial water channel at the bottom of the crucible, a first fan-shaped crucible furnace tube hollow water channel is arranged between the first fan-shaped crucible furnace tube water inlet and the first fan-shaped crucible furnace tube water outlet, and the sixth fan-shaped crucible furnace tube is internally provided with a second fan-shaped crucible furnace tube water inlet, the water inlet of the second fan-shaped crucible furnace tube has the same structure as the water inlet of the first fan-shaped crucible furnace tube.
As a further improvement of the technical scheme, a service hole is arranged below one side of the furnace shell.
As a further improvement of the technical scheme, the top of the furnace shell is provided with an observation device which is positioned above the crucible.
As a further improvement of the technical proposal, the pressure in the furnace shell is between 0.001 Pa and 100 Pa.
As a further improvement of the technical scheme, the furnace shell is a sealing structure.
As a further improvement of the technical scheme, the top of the casting mould is provided with a diversion trench.
Compared with the prior art, the beneficial effects of the utility model are that:
in the device for induction smelting of titanium and titanium alloy with the self-lining function, the crucible is formed by splicing a plurality of mutually insulated fan-shaped tubes through the arranged crucible, an induction current loop on the crucible is cut off, the current skin effect on the crucible is eliminated, the melting power is mainly concentrated on titanium and titanium alloy furnace charges, a layer of metal skull lining can be formed on the inner surface of the crucible, and the problems that the induction smelting electric efficiency is low, the smelting process cannot be carried out, and the pollution of the crucible and the refractory lining to titanium alloy liquid is large are solved.
Drawings
Fig. 1 is a schematic view of the overall cross-sectional structure of the present invention;
fig. 2 is a cross-sectional view of the overall cross-sectional structure of the present invention.
The various reference numbers in the figures mean:
1. a first sector crucible furnace tube; 1b, a first fan-shaped crucible furnace tube water inlet; 1c, a first fan-shaped crucible furnace tube hollow water channel; 1d, a water outlet of the first fan-shaped crucible furnace tube;
2. a second fan-shaped crucible furnace tube; 2a, a second ceramic insulating layer; 3. a third fan-shaped crucible furnace tube; 3a, a third ceramic insulating layer; 4. a fourth sector crucible furnace tube; 4a, a fourth ceramic insulating layer; 5. a fifth sector crucible furnace tube; 5a, a fifth ceramic insulating layer; 6. a sixth sector crucible furnace tube; 6b, a water inlet of a second fan-shaped crucible furnace tube;
7. molten metal; 8. autogenous furnace lining; 9. a crucible induction coil; 9a, an induction coil electricity inlet; 9b, an induction coil electricity outlet and water outlet; 10. the bottom of the crucible; 10a, a radial water channel at the bottom of the crucible;
11. an induction melting device; 11a, a furnace shell; 12. a crucible; 13. a furnace temperature detection control system; 14. an observation device; 15. an induction furnace power supply; 16. a furnace tilting device; 17. vacuum and back flushing argon systems; 18. a diversion trench; 19. an access hole; 20. casting a mold; 21. a centrifugal casting machine.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-2, the present embodiment provides an apparatus for induction melting titanium and titanium alloy with self-lining function, which includes a furnace shell 11a and a crucible 12, a molten metal 7 is disposed in the crucible 12, an induction furnace power supply 15, a tilting device 16 and a vacuum and back-flushing argon system 17 are disposed on the outer wall of the furnace shell 11a, the tilting device 16 is operated to turn over the crucible 12, so that the molten metal 7 in the crucible 12 is poured into a casting mold 20, the casting mold 20 is disposed on the inner wall of the bottom of the furnace shell 11a, a centrifugal casting machine 21 is disposed at the bottom of the casting mold 20, the induction melting device 11 and a furnace temperature detection control system 13 are disposed on the top of the furnace shell 11a, and the temperature detection control system 13 is used to control the temperature, so that the molten metal can be in a high temperature state for a long time, thereby ensuring the sufficient dissolution of refractory alloy elements, keeping the alloy components and temperature in the molten pool uniform, and being beneficial for pouring thin-wall complex castings, The method comprises the following steps of forming, arranging a crucible 12 in a furnace shell 11a, arranging furnace pipe fittings in the crucible 12, arranging insulating parts in the furnace pipe fittings, arranging a crucible induction coil 9 on the outer wall of the crucible 12, arranging an induction coil electricity inlet 9a at one end of the crucible induction coil 9, arranging an induction coil electricity outlet 9b at the other end of the crucible induction coil, arranging a self-generating furnace lining 8 in the crucible 12, splicing a plurality of mutually insulated fan-shaped pipes into the crucible 12 through the arranged crucible 12, cutting off an induction current loop on the crucible 12, eliminating a current skin effect on the crucible 12, and mainly concentrating melting power on titanium and titanium alloy furnace materials, wherein a metal skull furnace lining layer can be formed on the inner surface of the crucible 12.
In addition, the furnace tube component comprises a first fan-shaped crucible furnace tube 1, a second fan-shaped crucible furnace tube 2, a third fan-shaped crucible furnace tube 3, a fourth fan-shaped crucible furnace tube 4, a fifth fan-shaped crucible furnace tube 5 and a sixth fan-shaped crucible furnace tube 6, the insulating component comprises a second ceramic insulating layer 2a, a third ceramic insulating layer 3a, a fourth ceramic insulating layer 4a and a fifth ceramic insulating layer 5a, each insulating component is arranged in the furnace tube component, the first fan-shaped crucible furnace tube 1 is provided with a first fan-shaped crucible furnace tube water inlet 1b, the bottom of the crucible bottom 10 is provided with a first fan-shaped crucible furnace tube water outlet 1d which is connected with the first fan-shaped crucible furnace tube water inlet 1b, the crucible bottom 10 is also provided with a radial water channel 10a at the crucible bottom, a first fan-shaped crucible hollow water channel 1c is arranged between the first fan-shaped crucible furnace tube water inlet 1b and the first fan-shaped crucible water outlet 1d, be provided with second fan-shaped crucible boiler tube water inlet 6b in the sixth fan-shaped crucible boiler tube 6, second fan-shaped crucible boiler tube water inlet 6b is the same with first fan-shaped crucible boiler tube water inlet 1b structure, crucible 12 is formed by the body concatenation of 18 fan-shaped pipes, be high temperature heat-resisting porcelain insulator between two adjacent fan-shaped pipes, utilize high temperature heat-resisting porcelain insulator to cut off the induced current return circuit on 12 walls of crucible, eliminate electric current skin effect, the whole copper crucible has been avoided at first being heated, the problem of the electric current too high on the crucible, the heat that the cooling water was taken away is too much, the thermal efficiency is low excessively, the unable problem of going on of smelting process is solved.
Further, in order to improve the maintenance efficiency of the device, the lower part of one side of the furnace shell 11a is provided with a maintenance hole 19, and considering that the furnace shell 11a is not easy to maintain in a sealing state, therefore, the maintenance hole 19 can enable people to quickly enter the furnace shell 11a, and further the maintenance efficiency of the device is improved.
Further, in order to facilitate the observation of the molten metal 7 processed in the crucible 12, the top of the furnace shell 11a is provided with an observation device 14, the observation device 14 is located above the crucible 12, and the observation device 14 is preferably made of high temperature resistant transparent glass, so as to facilitate the observation of the molten metal 7 processed in the crucible 12 by people while ensuring high temperature resistance.
In addition, the pressure in the furnace shell 11a is between 0.001 Pa and 100Pa, and the pressure in the furnace shell 11a is controlled to be at the lower limit, so that the degassing of titanium and titanium metal liquid is facilitated, and the quality of the metal liquid 7 is improved. When the furnace pressure is controlled at a high limit, the titanium alloy containing the alloy elements with lower melting point and higher vapor pressure is favorably smelted, and the metal volatilization loss in the smelting process is reduced.
Further, in order to improve the accuracy of the pressure control in the furnace shell 11a, the furnace shell 11a is a sealing structure which prevents the external air from entering the furnace shell 11a by sealing, thereby improving the accuracy of the pressure control in the furnace shell 11 a.
Furthermore, in order to prevent the phenomenon of pouring of the molten metal 7 into the casting mold 20, the top of the casting mold 20 is provided with a diversion trench 18, the diversion trench 18 is of a trapezoidal structure with a large top opening, the opening area of the casting mold 20 is increased through the diversion trench 18, and the probability of the molten metal 7 entering the casting mold 20 is increased.
In the device for induction melting of titanium and titanium alloy with the self-lining function, when in use, granular titanium sponge and blocky alloy raw materials are loaded into the crucible 12, and when in loading, the influence of the skin effect and the ring effect on the temperature of different areas in the furnace is considered, so that the titanium and the alloy elements are ensured to be simultaneously melted. Generally, low melting point alloying elements such as aluminum, antimony, lead, manganese, etc. are loaded in the middle of the crucible 12, and titanium materials are loaded near the inner wall of the crucible 12.
After the furnace burden is loaded into the crucible 12, the furnace is sealed, the furnace shell 11a is vacuumized by starting the vacuum and argon back flushing system 17, argon is back flushed into the furnace shell 11a to dilute the air in the furnace shell 11a, and then the furnace shell is vacuumized again to meet the process pressure requirement. Water is introduced into the crucible 12 for cooling, and the power supply 15 of the induction furnace is started for smelting. In the smelting process, the smelting temperature is controlled by a furnace temperature detection control system 13, and the smelting process is observed by an observation device 14. When the aluminum-containing titanium alloy is smelted, the influence of the heat release effect when metals are mutually melted on the smelting temperature and the condensation shell of the autogenous furnace lining 8 is considered, and a stepped loading mode is adopted after degassing to slowly heat up and heat. When the alloy elements with low melting point and high vapor pressure are smelted, the blast furnace pressure can be adjusted to reduce the loss of the alloy elements. When an aluminum-containing alloy is smelted, the temperature rise speed is controlled, after a furnace material of the core aluminum is completely melted and alloyed, the smelting power is rapidly increased, electromagnetic stirring is enhanced, the material melting speed is improved, after furnace materials are completely melted and the alloy temperature and components are uniform and consistent, a technologist checks that an alloy melt is qualified, an operator starts a furnace tilting device 16, metal liquid 7 is tilted into a diversion trench 18, the metal liquid 7 enters a casting mold 20 from the diversion trench 18, and a centrifugal casting machine 21 is started to enable the casting mold 20 and a casting part 21 to rotate together, so that titanium and titanium alloy ingots with fine grains and compact tissues are obtained.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The utility model provides an induction melting titanium and titanium alloy's device with from furnace lining function which characterized in that: comprises a furnace shell (11a) and a crucible (12), wherein the outer wall of the furnace shell (11a) is provided with an induction furnace power supply (15), a furnace tilting device (16) and a vacuum and back flushing argon system (17), the inner wall of the bottom of the furnace shell (11a) is provided with a casting mold (20), the bottom of the casting mold (20) is provided with a centrifugal casting machine (21), the top of the furnace shell (11a) is provided with an induction smelting device (11) and a furnace temperature detection control system (13), the crucible (12) is arranged in the furnace shell (11a), a furnace pipe fitting is arranged in the crucible (12), an insulating piece is arranged in the furnace pipe fitting, the outer wall of the crucible (12) is provided with a crucible induction coil (9), one end of the crucible induction coil (9) is provided with an induction coil electricity inlet (9a), the other end of the crucible induction coil electricity outlet (9b), and the crucible (12) comprises a crucible bottom (10), and a self-generating furnace lining (8) is arranged in the crucible (12).
2. The apparatus for induction melting of titanium and titanium alloys having a self-lining function according to claim 1, wherein: the furnace tube part comprises a first fan-shaped crucible furnace tube (1), a second fan-shaped crucible furnace tube (2), a third fan-shaped crucible furnace tube (3), a fourth fan-shaped crucible furnace tube (4), a fifth fan-shaped crucible furnace tube (5) and a sixth fan-shaped crucible furnace tube (6), the insulating part comprises a second ceramic insulating layer (2a), a third ceramic insulating layer (3a), a fourth ceramic insulating layer (4a) and a fifth ceramic insulating layer (5a), each insulating part is arranged in the furnace tube part, the first fan-shaped crucible furnace tube (1) is provided with a first fan-shaped crucible furnace tube water inlet (1b), the bottom of the crucible bottom (10) is provided with a first fan-shaped crucible furnace tube water outlet (1d) corresponding to the first fan-shaped crucible furnace tube water inlet (1b), and the crucible bottom (10) is further provided with a radial water channel (10a) at the crucible bottom, a first fan-shaped crucible furnace tube hollow water channel (1c) is arranged between the first fan-shaped crucible furnace tube water inlet (1b) and the first fan-shaped crucible furnace tube water outlet (1d), a second fan-shaped crucible furnace tube water inlet (6b) is arranged in the sixth fan-shaped crucible furnace tube (6), and the second fan-shaped crucible furnace tube water inlet (6b) is identical to the first fan-shaped crucible furnace tube water inlet (1b) in structure.
3. The apparatus for induction melting of titanium and titanium alloys having a self-lining function according to claim 1, wherein: and an access hole (19) is formed below one side of the furnace shell (11 a).
4. The apparatus for induction melting of titanium and titanium alloys having a self-lining function according to claim 1, wherein: an observation device (14) is arranged at the top of the furnace shell (11a), and the observation device (14) is positioned above the crucible (12).
5. The apparatus for induction melting of titanium and titanium alloys having a self-lining function according to claim 1, wherein: the pressure in the furnace shell (11a) is between 0.001 and 100 Pa.
6. The apparatus for induction melting of titanium and titanium alloys having a self-lining function according to claim 1, wherein: the furnace shell (11a) is a sealing structure.
7. The apparatus for induction melting of titanium and titanium alloys with self-lining function according to claim 1, wherein: the top of the casting mould (20) is provided with a diversion trench (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220256844.2U CN217383746U (en) | 2022-02-08 | 2022-02-08 | Device for induction melting of titanium and titanium alloy with self-lining function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220256844.2U CN217383746U (en) | 2022-02-08 | 2022-02-08 | Device for induction melting of titanium and titanium alloy with self-lining function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217383746U true CN217383746U (en) | 2022-09-06 |
Family
ID=83097969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220256844.2U Active CN217383746U (en) | 2022-02-08 | 2022-02-08 | Device for induction melting of titanium and titanium alloy with self-lining function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217383746U (en) |
-
2022
- 2022-02-08 CN CN202220256844.2U patent/CN217383746U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110094705A1 (en) | Methods for centrifugally casting highly reactive titanium metals | |
| US20090133850A1 (en) | Systems for centrifugally casting highly reactive titanium metals | |
| JP3003914B2 (en) | Method for producing copper alloy containing active metal | |
| TW200409823A (en) | Method and device for controlling solidification of molten alloy in induction furnace with water-cooled copper crucible | |
| CN217383746U (en) | Device for induction melting of titanium and titanium alloy with self-lining function | |
| CN107815561B (en) | Titanium alloy preparation method | |
| CN212645338U (en) | Single or multi-electrode vacuum consumable arc melting device for titanium and titanium alloy | |
| CN212645345U (en) | Crucible for induction melting of titanium and titanium alloy | |
| CN108660320A (en) | A kind of low-aluminium high titanium-type high temperature alloy electroslag remelting process | |
| JPH11310833A (en) | Method for melting metal and alloy and melting and casting method thereof | |
| JP4263366B2 (en) | Method and apparatus for melting rare earth magnet scrap | |
| US5193607A (en) | Method for precision casting of titanium or titanium alloy | |
| CN107746999B (en) | Titanium alloy preparation facilities | |
| CN109930023B (en) | Manufacturing method of large-tonnage chromium-zirconium-copper alloy | |
| CN114134356A (en) | Zinc alloy production process | |
| CN110484742B (en) | Method for preparing Fe-W intermediate alloy by electron beam melting and high purification | |
| US4202997A (en) | Atmospheric control of flux pre-melting furnace | |
| JPS58133338A (en) | Method for melting titanium group metal or alloy thereof | |
| CN218744742U (en) | Induction melting plasma heat-preservation refining device for large-scale ingot casting of titanium and titanium alloy | |
| CN213120039U (en) | Novel suspension ingot-pulling crucible | |
| CN213841734U (en) | Automatic ingot turning device of vacuum suspension smelting furnace | |
| CN114850450B (en) | Refractory high-activity complex alloy suspension induction smelting negative pressure suction casting device and method | |
| CN117000985B (en) | Device for removing internal inclusions of ultra-high-purity copper or copper alloy cast ingot and preparation method | |
| CN217844710U (en) | Novel crucible with electromagnetic penetration and magnetic suspension capabilities | |
| RU2770807C1 (en) | Method for producing blanks from low-alloy copper-based alloys |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |