CN116987977B - Iron-nickel-based precise alloy material for FMM mask, alloy strip and smelting process - Google Patents
Iron-nickel-based precise alloy material for FMM mask, alloy strip and smelting process Download PDFInfo
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- 239000000956 alloy Substances 0.000 title claims abstract description 162
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 96
- 238000003723 Smelting Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 57
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 100
- 239000010959 steel Substances 0.000 claims description 100
- 239000002994 raw material Substances 0.000 claims description 48
- 238000005242 forging Methods 0.000 claims description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 39
- 238000007670 refining Methods 0.000 claims description 38
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 37
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 22
- 229910052742 iron Inorganic materials 0.000 claims description 18
- 238000002844 melting Methods 0.000 claims description 17
- 230000008018 melting Effects 0.000 claims description 17
- 229910052759 nickel Inorganic materials 0.000 claims description 17
- 229910052799 carbon Inorganic materials 0.000 claims description 15
- 150000002910 rare earth metals Chemical class 0.000 claims description 14
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 13
- 230000006698 induction Effects 0.000 claims description 13
- 229910002804 graphite Inorganic materials 0.000 claims description 12
- 239000010439 graphite Substances 0.000 claims description 12
- 229910052710 silicon Inorganic materials 0.000 claims description 12
- 239000010703 silicon Substances 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 11
- 239000012535 impurity Substances 0.000 claims description 11
- 239000011572 manganese Substances 0.000 claims description 11
- 239000007789 gas Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 10
- 229910052748 manganese Inorganic materials 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 claims description 7
- 229910052684 Cerium Inorganic materials 0.000 claims description 6
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 3
- 239000011261 inert gas Substances 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 229910052727 yttrium Inorganic materials 0.000 claims description 2
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 claims description 2
- 230000000873 masking effect Effects 0.000 claims 7
- 238000005070 sampling Methods 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 11
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 10
- 239000000919 ceramic Substances 0.000 description 9
- 239000002893 slag Substances 0.000 description 9
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 8
- 238000001816 cooling Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 8
- 229910052786 argon Inorganic materials 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000005086 pumping Methods 0.000 description 5
- 229910000851 Alloy steel Inorganic materials 0.000 description 4
- 238000005422 blasting Methods 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 4
- 239000002932 luster Substances 0.000 description 4
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- 238000010079 rubber tapping Methods 0.000 description 4
- 238000007872 degassing Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010309 melting process Methods 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229920001621 AMOLED Polymers 0.000 description 1
- 229910001111 Fine metal Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/20—Arc remelting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
- C23C14/042—Coating on selected surface areas, e.g. using masks using masks
-
- 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
Abstract
The invention belongs to the technical field of precision alloy production, relates to an iron-nickel-based precision alloy material for an FMM mask and an alloy strip, and further discloses a smelting process of the iron-nickel-based precision alloy material. According to the iron-nickel-based precise alloy material and alloy strip for the FMM mask, the purity of the precise alloy strip is improved by adding rare earth elements on the basis of the iron-nickel-based alloy material, and the inclusion and gas content are reduced. The alloy strip processed by the alloy material can meet the processing requirement of an FMM mask. According to the smelting process of the iron-nickel-based precise alloy material for the FMM mask, the processing performance of the alloy material and the alloy strip is effectively ensured through the precise control of each step of the smelting process.
Description
Technical Field
The invention belongs to the technical field of precision alloy production, relates to an iron-nickel-based precision alloy material for an FMM mask and an alloy strip prepared from the iron-nickel-based precision alloy material, and further discloses a smelting process of the iron-nickel-based precision alloy material.
Background
An Organic Light-emitting Device (OLED) is a Device that uses an Organic thin film as a Light-emitting layer and can generate a strong electro-optic effect under a low driving voltage, and is a surface Light source with unique advantages of self-luminescence, full-curing display, lightness, thinness, environmental protection, large visual angle, high response speed, high image refresh speed, good temperature characteristics, and capability of realizing flexible display. In recent years, OLED technology has been rapidly developed, and has shown great commercial value and wide application prospect in the fields of illumination, display and the like. At present, the main process of mass production of OLED, especially AMOLED panels, is to use a vacuum evaporation process, and FMM (Fine Metal Mask) evaporation technology must be used under the structure of OLED RGB Side By Side to obtain a high-quality thin film pattern layer, and then to use shielding means to attach RGB three light color molecules to the corresponding color areas respectively.
At present, the iron-nickel-based precise alloy strip for FMM mask has definite requirements, namely the characteristics of uniform thickness, small surface roughness, good plate flatness, high uniformity of grain orientation degree, small size and small quantity of inclusion defects, good tissue uniformity, few internal defects and high purity. The variation of these parameters has a great influence on the yield of the FMM mask.
The traditional iron-nickel-based precise alloy is a functional material with small fluctuation range of required components and small fluctuation range of performance, and the conventional smelting process adopts a non-vacuum induction furnace, a vacuum induction furnace or an electric arc furnace for smelting, and has the defects of uneven structure of the alloy for smelting and casting, loose or shrinkage cavity in the steel ingot, larger size of inclusions, more number of inclusions and the like. When the steel ingot is deformed into a strip, internal defects can be inherited into an alloy strip, and after sorting, a plurality of inclusions with the size of less than 20 mu m can be formed in the finished alloy strip. However, given that these microscopic defects of the alloy strip have little effect on their own performance properties, the application requirements of conventional functional materials can still be met, and therefore these defects of the alloy strip blank are not considered to be important.
However, when the iron-nickel-based precise alloy strip with microscopic defects produced by the conventional smelting process is used for processing an FMM mask, uneven structure of the alloy strip causes uneven stress of a part area of the alloy strip, concave-convex is formed in the middle of the alloy strip, and appearance defects such as warping and the like are formed at the edge of the alloy strip; loosening and shrinkage cavities in the steel ingot form heavy skin or subcutaneous bubbles; the brittle inclusions are crushed to form fine pores in the alloy strip, and the plastic inclusions are elongated in the alloy strip to form inclusion strips. These problems, which are not emphasized in the smelting process and the alloy strip process, can cause the local occurrence of concave-convex or warping of the mask, or affect the processing size, shape and precision of the produced mask plate, thereby seriously affecting the yield of the FMM mask. Taking the iron-nickel base alloy strip produced according to the conventional smelting process and component control as an example, the quality requirement of the alloy strip for FMM can not be met at all.
Disclosure of Invention
Therefore, a first object of the present invention is to provide an iron-nickel-based precision alloy material for FMM mask, which improves its application performance for processing alloy strips by composition adjustment;
the second object of the invention is to provide an iron-nickel-based precise alloy strip for FMM mask, which has the advantages of up to standard alloy components, good structure uniformity and extremely low inclusion content, and the quality of the alloy strip meets the quality requirement of FMM mask on the alloy strip;
the third object of the invention is to provide a smelting process of an iron-nickel-based precise alloy material for an FMM mask, which can improve the internal structure of an alloy blank, reduce the size and the number of inclusions in the alloy blank, improve the purity of the alloy blank and improve the processing performance of an alloy strip.
In order to solve the technical problems, the iron-nickel-based precise alloy material for the FMM mask comprises the following components in percentage by mass based on the total amount of the alloy material: less than or equal to 0.010-0.100% of C, 0.01-0.5% of Si, 0.30-0.65% of Mn, less than or equal to 0.02% of P, less than or equal to 0.02% of S, 30.0-50.0% of Ni, 0.0001-0.0020% of rare earth element, less than or equal to 15ppm of gas O, less than or equal to 15ppm of N, and the balance of Fe and unavoidable impurities. Further, the rare earth element content is preferably 0.0001 to 0.0015% by mass, more preferably 0.0005 to 0.0015% by mass.
In particular, the rare earth elements include, but are not limited to, cerium and/or yttrium.
The invention also discloses a smelting process of the iron-nickel-based precise alloy material for the FMM mask, which comprises the following steps:
(1) Preparing materials: the following raw materials are respectively taken: graphite carbon, pure iron, nickel blocks, industrial pure silicon, metal manganese and rare earth raw materials, controlling the content of other elements in various raw materials to be less than 1 percent, and carrying out pretreatment for standby;
(2) And (3) charging and melting: adding nickel blocks, graphite carbon and pure iron into a crucible of a vacuum induction furnace, and heating to perform melting treatment to obtain molten steel;
(3) Refining: heating the molten steel to a refining temperature for primary refining treatment, and adding the industrial pure silicon for continuous refining treatment;
(4) Casting: adding the manganese metal and the rare earth raw materials into the refined molten steel under the protective atmosphere, uniformly stirring, adjusting the molten steel to the casting temperature, and casting the molten steel to obtain an electrode for electroslag remelting;
(5) Electroslag remelting: performing surface finishing treatment on the electrode for electroslag remelting, and performing electroslag remelting treatment on the electrode for electroslag remelting in a protective atmosphere to obtain an electroslag remelting alloy ingot;
(6) Forging an alloy ingot: heating the electroslag remelting alloy ingot to a forging temperature, and forging to obtain an electrode;
(7) Vacuum consumable remelting: performing surface finishing treatment on the electrode, and performing vacuum consumable remelting treatment on the finished electrode to obtain a vacuum consumable remelting ingot;
(8) Remelting ingot forging: and heating the vacuum consumable remelting ingot to a forging temperature, forging to obtain an alloy blank, and performing surface finishing treatment to obtain the alloy blank.
Specifically, in the smelting process of the iron-nickel-based precise alloy material for the FMM mask, in the step (2), in the melting treatment step, the melting temperature of the raw materials after melting is controlled to be 1520+/-20 ℃;
preferably, the method further comprises the step of adjusting the smelting vacuum degree to be less than 10 Pa.
Specifically, in the smelting process of the iron-nickel-based precise alloy material for the FMM mask, in the step (3), the temperature of the primary refining is controlled to be 1600-1650 ℃; controlling the temperature of the continuous refining to 1550-1590 ℃;
preferably, the time of the primary refining step is 30-40min, and the vacuum degree is regulated to be below 3Pa after the primary refining step;
preferably, the time for continuing the refining step is 30-40min.
Specifically, in the smelting process of the iron-nickel-based precise alloy material for the FMM mask, in the step (4), the casting temperature is 1540+/-20 ℃;
preferably, the protective atmosphere comprises an inert gas.
Specifically, in the smelting process of the iron-nickel-based precise alloy material for the FMM mask, in the step (6), the forging temperature of the electroslag remelting alloy ingot is 850-1150 ℃.
Specifically, in the smelting process of the iron-nickel-based precise alloy material for the FMM mask, in the step (8), the forging temperature of the vacuum consumable remelting ingot is 850-1150 ℃.
The invention also discloses an iron-nickel-based precise alloy strip for the FMM mask, which is prepared by deforming the iron-nickel-based precise alloy material for the FMM mask;
the thickness of the alloy strip is 0.5mm or less, preferably 0.1mm or less, more preferably 0.05mm or less;
specifically, the alloy strip has the following characteristics: the size of the inclusions is less than or equal to 3 mu m, and the number of the inclusions is less than or equal to 3/mm.
The invention also discloses the iron-nickel-based precise alloy material for the FMM mask or the application of the iron-nickel-based precise alloy material for the FMM mask in preparing the FMM mask.
In the iron-nickel-based precise alloy material for the FMM mask, the content of C, si and Mn in the molten alloy steel is added and controlled in the induction smelting process, so that the molten alloy steel reacts with gas in the molten alloy steel to generate corresponding oxides, and the gas content in the molten alloy steel is reduced. The rare earth element has active property, and proper amount of rare earth is added to further react with residual gas in molten steel so as to achieve the effect of further degassing the molten steel.
It is found that when the content of C, si and Mn is too high, the alloy material can affect the material performance, and when the content is too low, the alloy material can affect the formation of inclusions in the smelting process. If the content of the rare earth element is too high, the rare earth element can reduce part of slag in the electroslag remelting process, so that the content of impurity elements in the blank is increased. If the content of rare earth elements is too low, the effect of degassing molten steel is not obvious, meanwhile, the effect of other inclusions of clusters cannot be guaranteed, a plurality of inclusions keep in a dispersed state in an ingot, and the control difficulty is increased for improving the purity of the alloy ingot through smelting, so that the content of elements in the molten steel is required to be controlled in a certain range in the smelting process.
In the iron-nickel-based precise alloy material for the FMM mask, rare earth oxide inclusions and other inclusion collision clusters in molten steel form large-size inclusions in the smelting deoxidation process. The large-size impurities are blocked and adsorbed by the filter in the casting process, so that the content of gas and impurities in molten steel poured into the ingot mould is reduced, and the purity of the vacuum induction smelting ingot is effectively improved. The ingot is subjected to the subsequent electroslag remelting and vacuum consumable twice remelting treatment, so that the purity of the blank is further improved.
In the iron-nickel-based precise alloy material for the FMM mask, if the smelting temperature is too low in the vacuum induction smelting process, the decomposition, diffusion and overflow of oxides and nitrides in molten steel are not facilitated, and the deoxidization reaction rate is low; if the smelting temperature is too high, the volatilization speed of various elements in the molten steel is increased under the vacuum condition, which is not beneficial to controlling alloy components, and simultaneously, higher requirements are put forward on the thermal stability of crucible materials, so that the temperature of the molten steel needs to be controlled in a specific range in the smelting process.
The iron-nickel-based precise alloy material for the FMM mask is prepared based on the alloy material, has the advantages of high purity of blanks, low impurity content and good tissue performance, and can meet the processing requirements of FMM masks.
According to the smelting process of the iron-nickel-based precise alloy material for the FMM mask, the processing performance of an alloy strip is effectively ensured through the precise control of each step of the smelting process:
1. according to the smelting process of the alloy material, through strictly preprocessing raw materials, a nickel plate is cut into proper blocks, the surface of iron is shot-blasted to remove iron scales on the surface, and the baking treatment is performed at 300-400 ℃ to reduce oxygen and hydrogen adsorbed on the surface, so that the introduction of impurities is reduced;
2. according to the smelting process of the alloy material, the components are sampled in the vacuum induction smelting process, and then the corresponding raw materials are adjusted and supplemented to enter molten steel to compensate the loss of the raw materials, so that the components of the alloy molten steel are ensured to meet expectations;
3. the smelting process of the alloy material needs to strictly control the temperature in the melting process and the refining process. Wherein, the temperature at which the melting is finished is kept at 1500-1540 ℃ to ensure that the raw materials are completely melted; the temperature in the earlier stage of refining is controlled at 1600-1650 ℃ to ensure the deoxidization reaction and degassing efficiency of molten steel; the temperature at the later stage of refining is controlled at 1550-1590 ℃, so that oxygen supply of crucible materials to molten steel and burning loss of active elements are reduced; the pouring temperature of molten steel poured from the furnace is controlled at 1540+/-20 ℃, so that proper fluidity is ensured in the molten steel pouring process, and meanwhile, the ingot mould is not melted, or the surface quality of a poured steel ingot is obviously reduced;
4. according to the smelting process of the alloy material, the vacuum degree in the melting process and the refining process is strictly controlled, the vacuum degree P in the raw material melting process is less than or equal to 10Pa, the vacuum degree in the refining process is less than or equal to 3Pa, the vacuum degree control in the vacuum induction smelting process is enhanced, the content of gas and volatile elements in molten steel in a crucible can be greatly reduced, the inclusion formation in the molten steel is reduced, and the purity of the alloy is improved;
5. according to the smelting process of the alloy material, argon is filled in the process of adding manganese and rare earth, so that volatilization of elements on the surface of molten steel is reduced, and components of the elements in the molten steel are stabilized;
6. according to the smelting process of the alloy material, the components of molten steel are accurately adjusted and controlled by on-line sampling and component detection in the smelting process; wherein, elements such as C, ni, fe and the like should be tested at least twice, si, mn, rare earth and S, P, O, N should be tested at least once, thus ensuring the accurate proportioning of the components of the alloy strip;
7. according to the smelting process of the alloy material, in the casting process, the ceramic filter is used for strictly filtering molten steel, impurities in the molten steel in a crucible are reduced to be cast into an ingot mould to be solidified to form a steel ingot, and the surface of an electrode is peeled or polished to remove the impurities on the surface of the steel ingot, so that the impurity content of the alloy material can be effectively ensured to be reduced;
8. the production process of the alloy material requires finishing the surface of an electrode, sampling and detecting the content of inclusions, controlling the level of the inclusions below a certain number and a certain size, reducing the inclusions from entering a remelted ingot, improving the purity of the remelted ingot, sampling and detecting the end head of a plate blank formed by forging, controlling the level of the inclusions below a certain number and a certain size, and processing the blank into a strip.
According to the smelting process of the alloy material, through the accurate control of each step in the smelting process, the prepared alloy material has the advantages of up-to-standard components, good tissue uniformity and extremely low inclusion content, and the quality of the produced alloy strip meets the technical requirements for FMM.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.
In the following embodiments of the present invention, in order to meet the performance requirements of FMM masks, the prepared alloy strip may meet the following quality requirements: the size of the inclusions is less than or equal to 3 mu m, and the number of the inclusions is less than or equal to 3/mm.
The invention is used for preparing the high-purity iron-nickel alloy material, which comprises the following components in percentage by mass: 0.010-0.100% of C, 0.01-0.5% of Si, 0.30-0.65% of Mn, less than or equal to 0.02% of P, less than or equal to 0.02% of S, 30.0-50.0% of Ni, 0.0001-0.0020% of rare earth element, less than or equal to 15ppm of gas O, less than or equal to 15ppm of N, and the balance of Fe and unavoidable impurities.
Example 1
The preparation method is used for preparing the high-purity iron-nickel alloy material, and specific components and mass contents of the high-purity iron-nickel alloy material are shown in the following table 1 based on the total alloy.
The smelting process of the alloy material comprises the following steps:
(1) Preparing materials: pretreating raw materials, and drying, cleaning, dust-free and oil-free surfaces of the pretreated raw materials; the raw materials comprise: graphite carbon, pure iron blocks, nickel blocks, industrial pure silicon, metal manganese and rare earth cerium; performing surface shot blasting treatment on the iron block and the nickel block to remove surface oxide skin;
(2) And (3) charging and melting: adding nickel blocks, graphite carbon and pure iron into a vacuum induction furnace crucible in a hopper mode, pumping the vacuum degree of a smelting chamber to 9Pa, heating raw materials by power supply, measuring the temperature after the raw materials are melted down, stirring at the actual temperature of 1525 ℃ to ensure that the molten steel components are uniform, sampling and detecting the components, and then adjusting the components of the molten steel by using corresponding raw materials;
(3) Refining: the method comprises the steps of (1) heating molten steel in the earlier stage of refining, then measuring the temperature, wherein the actual temperature is 1635 ℃, performing primary refining for 40min, pumping the vacuum degree of a smelting chamber to be 2Pa, then adding industrial pure silicon, and measuring the temperature of the molten steel, wherein the actual temperature is 1580 ℃; continuing refining for 30min, sampling, detecting components, and adding raw materials to adjust the components of the molten steel;
(4) Tapping and pouring: continuously introducing argon into a smelting chamber, adding manganese metal into molten steel, stirring uniformly, then continuously adding rare earth cerium, stirring uniformly again, sampling, detecting components, adjusting the components of the molten steel by using corresponding raw materials, measuring the temperature, confirming that the temperature of the molten steel is 1541 ℃, introducing the molten steel into a funnel provided with a ceramic filter, and pouring the molten steel into a steel ingot mould through the ceramic filter to obtain an electrode for electroslag remelting;
(5) Electroslag remelting: performing surface finishing on the electrode for electroslag remelting, and performing head and tail cutting and surface polishing treatment on the alloy electrode to achieve smelting conditions of an electroslag remelting furnace; carrying out electroslag remelting on the finished electrode in a protective atmosphere electroslag furnace to obtain an electroslag remelting alloy ingot;
(6) Forging an electroslag remelting ingot: heating the obtained electroslag remelting alloy ingot to 1150 ℃ in an electric furnace, preserving heat for 4 hours, taking out, forging into a round rod-shaped electrode by using a forging hammer, ending forging at 870 ℃, and then cooling;
(7) Vacuum consumable remelting: the surface of the obtained vacuum consumable electrode is peeled and finished, a part of the two ends of the steel bar are cut off, then the two ends of the steel bar are sampled, and the number and the size of the inclusions at the end are detected and confirmed to be smaller than 0.5 level (GB/T10561-2023), and the surface of the steel bar is metallic luster and has no cracks and slag inclusion; then carrying out vacuum consumable remelting on the finished steel bar in a vacuum consumable furnace to obtain a vacuum consumable remelted ingot;
(8) Forging a vacuum consumable remelting ingot: carrying out surface peeling finishing on the formed vacuum consumable remelting ingot by using a lathe, wherein the surface of the obtained steel ingot is free of slag inclusion or micropores; then heating the finished steel ingot to 1150 ℃ in an electric furnace, preserving heat for 4 hours, taking out, forging into a cuboid blank with a certain size, ending forging at 869 ℃, and then cooling; the formed cuboid blank is subjected to surface crack removal by a milling machine, is sampled after head and tail cutting parts are removed, and is subjected to inclusion content detection, so that the number and the size of the cuboid blank are confirmed to be far smaller than the requirements of national standard grade 0.5 (GB/T10561-2023).
Example 2
The preparation method is used for preparing the high-purity iron-nickel alloy material, and specific components and mass contents of the high-purity iron-nickel alloy material are shown in the following table 1 based on the total alloy.
The smelting process of the alloy material comprises the following steps:
(1) Preparing materials: pretreating raw materials, and drying, cleaning, dust-free and oil-free surfaces of the pretreated raw materials; the raw materials comprise: graphite carbon, pure iron blocks, nickel blocks, industrial pure silicon, metal manganese and rare earth cerium; performing surface shot blasting treatment on the iron block and the nickel block to remove surface oxide skin;
(2) And (3) charging and melting: adding nickel blocks, graphite carbon and pure iron into a vacuum induction furnace crucible in a hopper mode, starting heating raw materials by power supply, pumping the vacuum degree of a smelting chamber to 5.0Pa, measuring the temperature after the raw materials are molten, controlling the molten temperature to 1522 ℃, stirring to ensure that molten steel components are uniform, sampling and detecting the components, and then adjusting the components of the molten steel by using corresponding raw materials;
(3) Refining: the molten steel is heated in the earlier stage of refining, then the actual temperature is 1638 ℃, primary refining is carried out for 40min, and the vacuum degree of the melting chamber is pumped to 2.5Pa; then adding industrial pure silicon, measuring the temperature of the molten steel, continuously refining for 30min at the actual temperature of 1583 ℃, sampling and detecting components, and then adjusting the components of the molten steel by using corresponding raw materials;
(4) Tapping and pouring: continuously introducing argon into a smelting chamber, adding manganese metal into molten steel, stirring uniformly, then continuously adding rare earth cerium, stirring uniformly again, sampling, detecting components, adjusting the components of the molten steel by using corresponding raw materials, measuring the temperature to confirm that the temperature result of the molten steel is 1540 ℃, introducing the molten steel into a funnel provided with a ceramic filter, and pouring the molten steel into a steel ingot mould through the ceramic filter to obtain an electrode for electroslag remelting;
(5) Electroslag remelting: performing surface finishing on the electrode for electroslag remelting, and performing head and tail cutting and surface polishing treatment on the alloy electrode to achieve smelting conditions of an electroslag remelting furnace; carrying out electroslag remelting on the finished electrode in a protective atmosphere electroslag furnace to obtain an electroslag remelting alloy ingot;
(6) Forging an electroslag remelting ingot: heating the obtained electroslag remelting alloy ingot to 1150 ℃ in an electric furnace, preserving heat for 4 hours, taking out, forging into a round rod-shaped electrode by using a forging hammer, ending the forging at 872 ℃, and then cooling;
(7) Vacuum consumable remelting: the surface of the obtained vacuum consumable electrode is peeled and finished, a part of the two ends of the steel bar are cut off, then the two ends of the steel bar are sampled, and the number and the size of inclusions are detected and confirmed to be smaller than 0.5 level (GB/T10561-2023), and the surface of the steel bar is metallic luster and has no cracks and slag inclusion; then carrying out vacuum consumable remelting on the finished steel bar in a vacuum consumable furnace to obtain a vacuum consumable remelted ingot;
(8) Forging a vacuum consumable remelting ingot: the formed vacuum consumable remelting ingot is subjected to surface peeling finishing by using a lathe, and the surface is free of slag inclusion or micropores; then heating the finished steel ingot to 1150 ℃ in an electric furnace, preserving heat for 4 hours, taking out, forging into a cuboid blank with a certain size, ending forging at 865 ℃, and then cooling; the formed cuboid blank is subjected to surface crack removal by a milling machine, is sampled after head and tail cutting parts are removed, and is subjected to inclusion content detection, so that the number and the size of the cuboid blank are confirmed to be far smaller than the requirements of national standard grade 0.5 (GB/T10561-2023).
Comparative example 1
The comparative example is used for preparing high-purity iron-nickel alloy materials, and specific components and mass contents based on the total alloy are shown in the following table 1, and compared with the embodiment, the rare earth raw materials are not added in the comparative example.
The smelting process of the alloy material in the comparative example comprises the following steps:
(1) Preparing materials: pretreating raw materials, and drying, cleaning, dust-free and oil-free surfaces of the pretreated raw materials; the raw materials comprise: graphite carbon, pure iron blocks, nickel blocks, industrial pure silicon and manganese metal; performing surface shot blasting treatment on the iron block and the nickel block to remove surface oxide skin;
(2) And (3) charging and melting: adding nickel blocks, graphite carbon and pure iron into a crucible of a vacuum induction furnace in a hopper mode; heating raw materials by power supply, pumping the vacuum degree of a smelting chamber to 6Pa, measuring the temperature after the raw materials are smelted, stirring to ensure that the molten steel components are uniform, sampling and detecting the components, and then adjusting the components of the molten steel by using corresponding raw materials;
(3) Refining: the molten steel is heated in the earlier stage of refining, then the temperature is measured, the actual temperature is 1637 ℃, the refining time is 40min, and the vacuum degree of the melting chamber is pumped to 1.5Pa; adding industrial pure silicon, measuring the temperature to confirm that the temperature of molten steel is 1574 ℃, continuing refining for 30min, sampling, detecting components, and adjusting the components of the molten steel by using corresponding raw materials;
(4) Tapping and pouring: continuously introducing argon into a smelting chamber, adding manganese metal into molten steel, uniformly stirring, sampling and detecting components, then using corresponding raw materials to adjust the components of the molten steel, measuring the temperature to 1541 ℃, introducing the molten steel into a funnel provided with a ceramic filter, and pouring the molten steel into an ingot mould through the ceramic filter to obtain an electrode for electroslag remelting;
(5) Electroslag remelting: performing surface finishing on the electrode for electroslag remelting, and performing head and tail cutting and surface polishing treatment on the formed alloy electrode to achieve smelting conditions of an electroslag remelting furnace; electroslag remelting is carried out on the finished electrode in a protective atmosphere electroslag furnace, so that an electroslag remelting alloy ingot is obtained;
(6) Forging an electroslag remelting ingot: heating the obtained electroslag remelting alloy ingot to 1150 ℃ in an electric heating furnace, preserving heat for 4 hours, taking out, forging into a round rod-shaped electrode by using a forging hammer, ending the forging at 872 ℃, and then cooling;
(7) Vacuum consumable remelting: peeling and finishing the surface of a vacuum consumable electrode, cutting off a part of the two ends of a steel rod, sampling the two ends of the steel rod, detecting the content of inclusions, and confirming that the number and the size are less than 0.5 level (GB/T10561-2023), wherein the surface of the steel rod is free from cracks and slag inclusion and has metallic luster; then carrying out vacuum consumable remelting on the finished steel bar in a vacuum consumable furnace to obtain a vacuum consumable remelted ingot;
(8) Forging a vacuum consumable remelting ingot: the formed steel ingot is subjected to surface peeling finishing by using a lathe, and the surface is free of slag inclusion or micropores; heating the formed steel ingot to 1150 ℃ in an electric heating furnace, preserving heat for 4 hours, taking out, forging into a cuboid blank with a certain size, ending forging at 868 ℃, and then cooling; and removing surface cracks of the formed cuboid blank by using a milling machine, sampling after head and tail cutting parts, detecting the content of inclusions, and confirming that the number and the size are smaller than 0.5 grade (GB/T10561-2023).
Comparative example 2
The comparative example is used for preparing high-purity iron-nickel alloy materials, and specific components and mass contents based on the total alloy are shown in the following table 1, and compared with the embodiment, the rare earth raw materials are not added in the comparative example.
The smelting process of the alloy material in the comparative example comprises the following steps:
(1) Preparing materials: pretreating raw materials, and drying, cleaning, dust-free and oil-free surfaces of the pretreated raw materials; the raw materials comprise: graphite carbon, pure iron blocks, nickel blocks, industrial pure silicon and manganese metal; performing surface shot blasting treatment on the iron block and the nickel block to remove surface oxide skin;
(2) And (3) charging and melting: adding nickel blocks, graphite carbon and pure iron into a crucible of a vacuum induction furnace in a hopper mode; heating raw materials by power supply, pumping the vacuum degree of a smelting chamber to 7Pa, measuring the temperature after the raw materials are smelted, stirring to ensure that the molten steel components are uniform, sampling and detecting the components, and then adjusting the components of the molten steel by using corresponding raw materials;
(3) Refining: in the earlier stage of refining, the temperature of molten steel is raised, then the temperature is measured, the actual temperature is 1645 ℃, the refining time is 40min, and the vacuum degree of a melting chamber is pumped to 3.2Pa; adding industrial pure silicon, measuring the temperature, displaying 1579 ℃, continuing refining for 30min, sampling, detecting components, and adjusting the components of the molten steel by using corresponding raw materials;
(4) Tapping and pouring: continuously introducing argon into a smelting chamber, adding manganese metal into molten steel, uniformly stirring, sampling and detecting components, then using corresponding raw materials to adjust the components of the molten steel, measuring the temperature to 1544 ℃, introducing the molten steel into a funnel provided with a ceramic filter, and pouring the molten steel into an ingot mould through the ceramic filter to obtain an electrode for electroslag remelting;
(5) Electroslag remelting: finishing the surface of an electrode for electroslag remelting, and performing head and tail cutting and surface polishing treatment on the formed alloy electrode to achieve the smelting condition of an electroslag remelting furnace; carrying out electroslag remelting on the finished electrode in a protective atmosphere electroslag furnace to obtain an electroslag remelting alloy ingot;
(6) Forging an electroslag remelting ingot: heating the obtained electroslag remelting alloy ingot to 1150 ℃ in a natural gas heating furnace or an electric heating furnace, preserving heat for 4 hours, taking out, forging into a round rod-shaped electrode by using a forging hammer, ending the forging at 861 ℃, and then cooling;
(7) Vacuum consumable remelting: peeling and finishing the surface of a vacuum consumable electrode, cutting off a part of the two ends of a steel rod, sampling the two ends of the steel rod, detecting the content of inclusions, confirming the quantity and the size to be less than 0.5 level (GB/T10561-2023), and ensuring that the surface of the steel rod is free of cracks and slag inclusion and has metallic luster; then carrying out vacuum consumable remelting on the finished steel bar in a vacuum consumable furnace to obtain a vacuum consumable remelted ingot;
(8) Forging a vacuum consumable remelting ingot: the formed steel ingot is subjected to surface peeling finishing by using a lathe, and the surface is free of slag inclusion or micropores; heating the formed steel ingot to 1150 ℃ in an electric heating furnace, preserving heat for 4 hours, taking out, forging into a cuboid blank with a certain size, ending forging at 877 ℃, and then cooling; and removing surface cracks of the formed cuboid blank by using a milling machine, sampling after head and tail cutting parts, detecting the content of inclusions, and confirming that the number and the size are smaller than 0.5 grade (GB/T10561-2023).
TABLE 1 alloy material composition and content
Experimental example
The high purity iron-nickel alloy materials prepared in examples 1-2 and comparative examples 1-2 above were tested, respectively.
Sampling test components on a smelted blank, and deforming the blank into an alloy strip with the thickness of 0.03 mm. In order to count the distribution of inclusions in the length direction and the width direction of the alloy strip, sampling positions are set respectively: the alloy strip product was divided into 5 alloy strips of the same width, and samples were taken at the same positions at the head, middle and tail of each alloy strip, with a sampling area of 1cm 2 . The inclusion was observed by a scanning electron microscope after sampling, and the results of the maximum size and number of inclusions having a length of 1 μm or more in the range of 1mm in the 5 samples of the head, the middle and the tail were recorded, respectively, as shown in Table 2 below.
Table 2 alloy billet test results
According to the results of sampling analysis and test on the alloy strips corresponding to the iron-nickel base alloy billets prepared in examples 1-2 and comparative examples 1-2 shown in table 1, the alloy billets prepared in examples 1 and 2 according to the process of VIM (rare earth addition) +esr+var of the present invention have lower gas content, and the inclusions in the prepared alloy strips show smaller size and smaller number, which is advantageous for the dimensional stability of FMM masks; the alloy blank prepared by the comparative example process has higher gas content, and the prepared alloy strip has more inclusions and wide size distribution range, and can influence the processing precision of the FMM mask.
The foregoing has outlined rather broadly the more detailed description of embodiments of the invention, wherein the principles and embodiments of the invention are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (10)
1. An iron-nickel-based precision alloy strip for FMM masks, characterized in that it is produced by deforming an iron-nickel-based precision alloy material for FMM masks, said alloy strip having the following characteristics: the size of the inclusions is less than or equal to 3 mu m, and the number of the inclusions is less than or equal to 3/mm;
the iron-nickel-based precise alloy material for the FMM mask is characterized by comprising the following components in percentage by mass based on the total amount of the alloy material: 0.010-0.100% of C, 0.01-0.5% of Si, 0.30-0.65% of Mn, less than or equal to 0.02% of P, less than or equal to 0.02% of S, 30.0-50.0% of Ni, 0.0001-0.0020% of rare earth element, less than or equal to 15ppm of gas O, less than or equal to 15ppm of N, and the balance of Fe and unavoidable impurities.
2. The iron-nickel based precision alloy ribbon for FMM mask according to claim 1, wherein the rare earth element comprises cerium element and/or yttrium element.
3. The iron-nickel-based precision alloy strip for FMM masking according to claim 1, wherein the thickness of the alloy strip is 0.5mm or less.
4. A method of producing an iron-nickel-based precision alloy ribbon for FMM masking as claimed in any one of claims 1 to 3, comprising: the iron-nickel-based precise alloy material for the FMM mask is manufactured by deforming the iron-nickel-based precise alloy material for the FMM mask, wherein the smelting process of the iron-nickel-based precise alloy material for the FMM mask comprises the following steps of:
(1) Preparing materials: the following raw materials are respectively taken: pretreating graphite carbon, pure iron, nickel blocks, industrial pure silicon, metal manganese and rare earth raw materials for later use;
(2) And (3) charging and melting: adding nickel blocks, graphite carbon and pure iron into a crucible of a vacuum induction furnace, and heating to perform melting treatment to obtain molten steel;
(3) Refining: heating the molten steel to a refining temperature for primary refining treatment, and adding the industrial pure silicon for continuous refining treatment;
(4) Casting: adding the metal manganese and rare earth raw materials into the refined molten steel under a protective atmosphere, stirring uniformly, adjusting the molten steel to a casting temperature, and casting the molten steel to obtain an electrode for electroslag remelting;
(5) Electroslag remelting: performing surface finishing treatment on the electrode for electroslag remelting, and performing electroslag remelting treatment on the electrode for electroslag remelting in a protective atmosphere to obtain an electroslag remelting alloy ingot;
(6) Forging an alloy ingot: heating the electroslag remelting alloy ingot to a forging temperature, and forging to obtain an electrode;
(7) Vacuum consumable remelting: performing surface finishing treatment on the electrode, and performing vacuum consumable remelting treatment on the finished electrode to obtain a vacuum consumable remelting ingot;
(8) Remelting ingot forging: and heating the vacuum consumable remelting ingot to a forging temperature, forging to obtain an alloy blank, and performing surface finishing treatment to obtain the alloy blank.
5. The method for producing an iron-nickel-based precision alloy strip for FMM masking according to claim 4, wherein in said step (2), the melting temperature after melting the raw material is controlled to 1520±20 ℃; and/or the number of the groups of groups,
the step (2) further comprises the step of adjusting the smelting vacuum degree to be less than 10 Pa.
6. The method for producing an iron-nickel-based precision alloy strip for FMM masking according to claim 4, wherein in said step (3), the temperature of said preliminary refining is controlled to 1600-1650 ℃; controlling the temperature of the continuous refining to 1550-1590 ℃;
the time of the primary refining step is 30-40min, and the vacuum degree is regulated to be below 3Pa after the primary refining step.
7. The method for producing a strip of iron-nickel-based precision alloy material for FMM masking according to claim 4, wherein in said step (4), said casting temperature is 1540±20 ℃;
the protective atmosphere comprises an inert gas.
8. The method for producing a strip of an iron-nickel-based precision alloy material for FMM masking according to claim 4, wherein in said step (6), said forging temperature of said electroslag remelting alloy ingot is 850-1150 ℃.
9. The method for producing a strip of an iron-nickel-based precision alloy material for FMM masking according to claim 4, wherein in said step (8), said forging temperature of said vacuum consumable remelting ingot is 850 to 1150 ℃.
10. Use of an iron-nickel based precision alloy ribbon for FMM masks according to any of claims 1-3 for the preparation of FMM masks.
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