CN115156487A - Method for manufacturing homogenized copper alloy cast ingot - Google Patents
Method for manufacturing homogenized copper alloy cast ingot Download PDFInfo
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for manufacturing a homogenized copper alloy cast ingot, which comprises the following steps: s1, burdening; s2, melting furnace burden; s3, ingot casting and forming; s4, secondary melting; and S5, secondary ingot casting and forming. The invention manufactures the copper alloy by a secondary melting mode, namely a casting and casting mode, and by adopting the secondary melting mode, the treatment time is short, the homogenization range is wide, and simultaneously, the homogenization can be realized not only on the micro scale but also on the macro scale.
Description
Technical Field
The invention relates to the technical field of alloys, in particular to a method for manufacturing a homogenized copper alloy cast ingot.
Background
The copper alloy is an industrial material which is made by alloying copper as a main component and adding other metal or nonmetal elements. Because it has excellent electrical conductivity, thermal conductivity, mechanical property, corrosion resistance and wear resistance, it is widely used in various industries such as electronic communication, integrated circuit, aerospace, weapons and military industry, transportation tools, mould tools, etc.
When a copper alloy ingot is manufactured by a conventional casting method, the added metals or intermediate alloys have differences in physical and chemical properties such as melting point, density, liquid fluidity, chemical activity and the like from the main component copper, and also have differences in the metallurgical properties such as solid solubility, diffusivity, nucleation capability, solid-phase reaction, crystal growth, recrystallization and the like of different elements in copper, thereby causing the phenomenon of non-uniformity of the internal quality of the ingot. The non-homogenized cast ingot causes various problems of inconsistent quality, low yield, high production difficulty and the like in various deformation processing, heat treatment and mechanical processing processes in the post-process, and finally influences the characteristics of the product such as mechanical property, wear resistance, corrosion resistance, surface quality and the like.
In addition, the conventional ingot casting is generally homogenized by adopting a casting and heat treatment mode, the heat treatment is carried out in a solid state, the temperature is below the melting point, the time required by the treatment is long, and the homogenization range is small.
Therefore, the production of homogenized ingots is a very important issue in the alloy manufacturing industry, and various enterprises and research institutions are developing technical methods and technical measures for overcoming the problem of non-homogenization.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for manufacturing a homogenized copper alloy cast ingot.
The invention is realized by the following technical scheme:
a method of producing a homogenized copper alloy ingot, comprising the steps of:
s1, burdening: weighing furnace charge with corresponding mass according to the weight percentage of elements: 4.10 to 4 to 30 percent of Sn, 3.70 to 3.90 percent of Zn, 1.90 to 2.10 percent of Pb, 0.03 to 0.07 percent of Co, 0.13 to 0.17 percent of Ni, 0.033 to 0.037 percent of Fe, 0.022 to 0.028 percent of P, and the balance of Cu and other inevitable impurities, wherein the Cu content is more than 89.385 percent;
s2, melting furnace burden: adding furnace burden into a crucible for induction heating;
s3, ingot casting forming: refining the completely melted furnace burden, casting the refined furnace burden into a mold, and solidifying liquid metal into a cast ingot in the mold;
s4, secondary melting: taking out the cast ingot from the mold, taking the cast ingot as a new furnace charge, and putting the dry and clean new furnace charge into a crucible for induction heating;
s5, secondary ingot casting and forming: refining the completely melted new furnace charge, casting the refined new furnace charge into a mold, and solidifying the liquid metal in the mold into an alloy ingot.
As a preferred embodiment of the present invention, in step S1, furnace burden materials of corresponding mass are weighed according to the weight percentage of elements: 4.20% of Sn, 3.80% of Zn, 2.0% of Pb, 0.05% of Co, 0.15% of Ni, 0.0357% of Fe, 0.025% of P and the balance of Cu and other inevitable impurities, wherein Cu is more than 89.73%.
In step S1, as a preferred embodiment of the present invention, dust and oil stains on the surface of each furnace material need to be removed, and water vapor is removed by hot air drying or oven preheating.
As a preferred embodiment of the invention, in step S2, the furnace burden is put into a crucible, meanwhile, a clean and dry casting mold is put into a vacuum furnace, a furnace cover is closed, the vacuum furnace is vacuumized to be below 10Pa, then high-purity argon is introduced to 10-30KPa, and a medium-frequency induction power supply is started to start heating until the furnace burden is completely melted.
As a preferred embodiment of the present invention, in step S3, after the furnace burden is completely melted, the furnace is shaken for 3 minutes in a heat preservation state, then kept still for 10 minutes, then vacuumized and exhausted once, and shaken for 1 minute, and finally the liquid alloy is rapidly cast into a mold, and the liquid alloy is cooled and solidified into an ingot in the mold in a protective atmosphere in the furnace.
As a preferred embodiment of the invention, in step S4, the ingot prepared in step S3 is used as a new charge, the new charge is placed into a crucible with the top facing upward, meanwhile, a clean and dry casting mold is placed into a vacuum furnace, a furnace cover is closed, high-purity argon is introduced to 10-30KPa after vacuumizing to below 10Pa, and a medium-frequency induction power supply is started to start heating; wherein, before the new furnace charge is put into the furnace, the new furnace charge needs to remove dust and oil stains on the surface and dry natural moisture.
As a preferred embodiment of the invention, the surface defects of the ingot need to be removed before the new charge is placed into the crucible.
As a preferred embodiment of the present invention, in step S5, after the induction heating temperature is raised to the melting point of the new furnace material and starts to melt, the melting of the new furnace material is accelerated by shaking the furnace, after all the furnace materials are melted down, the furnace is shaken for 1 minute in the heat preservation state, the liquid metal is immediately kept in the continuous flow state, then the liquid metal is cast into the mold, the liquid metal is rapidly solidified in the mold by adopting a water cooling or air cooling mode in the protective atmosphere in the furnace, and the ingot casting is completed after the liquid metal is cooled to the room temperature.
The invention discloses a method for manufacturing a homogenized copper alloy cast ingot, which is compared with the prior art that:
the copper alloy is manufactured by secondary melting, namely a casting and casting mode, and the secondary melting mode has short treatment time and large homogenization range, and simultaneously can not only be homogenized in a micro-scale, but also be homogenized in a macro-scale; the cast ingot manufactured by the method has uniform and fine metallographic structures at different positions, has roughly the same component content, and alloy elements are uniformly dissolved in a matrix or uniformly precipitated in a crystal or a crystal boundary in a simple substance or compound form.
Drawings
FIG. 1 is a schematic representation of the annealed metallographic structure of a homogenized ingot.
FIG. 2 is a schematic diagram of the annealed metallographic structure of a conventional ingot.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and the specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The first embodiment is as follows:
a casting method of a homogenized copper alloy ingot, comprising the steps of:
s1, burdening: weighing corresponding furnace burden according to the weight percentage of elements, wherein the furnace burden comprises the following components in percentage by weight: 4.3% of Sn, 3.9% of Zn, 2.10% of Pb, 0.07% of Co, 0.17% of Ni, 0.037% of Fe, 0.028% of P and the balance of Cu and other inevitable impurities, wherein Cu is more than 89.385%; further, the inevitable impurities include Al, si, sb, bi and the like, and the content is 20ppm or less; preparing 50kg of furnace burden according to the proportion, wherein the surface dust and oil stain of each furnace burden are required to be removed, and the furnace burden is dried by hot air or preheated by an oven to remove water vapor and can also be properly cut or crushed to a proper size; (wherein, the total content of Cu + Sn + Zn + Pb + Co + Ni + Fe + P is more than 99.99%, the content of other impurities is less than 0.01%, ensuring the purity of the copper alloy)
S2, melting furnace materials: putting the prepared furnace burden into a crucible or an alloy bin, simultaneously putting a clean and dry casting mold into a vacuum furnace at a designated position, closing a furnace cover, vacuumizing to below 10Pa, introducing high-purity argon to 10-30KPa, starting a medium-frequency induction power supply to heat for 30 minutes until the temperature reaches 1100-1500 ℃;
s3, ingot casting and forming: the added furnace materials are gradually melted along with the induction heating, after all the furnace materials are melted, the furnace is shaken for 3 minutes under the heat preservation state, then the furnace is kept still for 10 minutes, then the furnace is vacuumized and exhausted once, and then the furnace is shaken for 1 minute, finally the liquid alloy is quickly cast into a mold, and the liquid alloy is cooled and solidified into an ingot in the mold in the protective atmosphere in the furnace;
s4, secondary melting: after the ingot is cooled to a lower temperature, opening a furnace door to take out the mold and the ingot inside, taking the ingot as a remelted new furnace material, keeping the top of the new furnace material (ingot) upward, putting the new furnace material (ingot) into a crucible (if the new furnace material is cut, putting each section of furnace material into the crucible with the top upward), cleaning dust and oil stains on the surface of the furnace material before putting the new furnace material (ingot) into the crucible, drying natural moisture, putting a clean and dry casting mold into a vacuum furnace for a specified position, closing a furnace cover, vacuumizing to below 10Pa, introducing high-purity argon to 10-30KPa, starting a medium-frequency induction power supply to heat for 30 minutes until the temperature reaches 1100-1500 ℃; before the new furnace charge is put into the crucible, the surface defects of the cast ingot need to be removed;
s5, secondary ingot casting forming: after the induction heating temperature rises to the melting point of the new furnace charge and starts to melt, the furnace shaking is used for accelerating the melting of the furnace charge, after all the new furnace charge is melted down, the furnace shaking is carried out for 1 minute under the heat preservation state, the liquid metal is immediately kept in the non-continuous flow state and is poured into a mold at a slow speed, the liquid metal is rapidly solidified in the mold in the protective atmosphere in the furnace by adopting a water cooling or air cooling mode, and the ingot casting is completed after the liquid metal is cooled to the room temperature.
Example two:
a casting method of a homogenized copper alloy ingot, comprising the steps of:
s1, burdening: weighing corresponding furnace burden according to the weight percentage of elements, wherein the furnace burden comprises the following components in percentage by weight: 4.20% of Sn, 3.80% of Zn, 2.0% of Pb, 0.05% of Co, 0.15% of Ni, 0.035% of Fe, 0.025% of P and the balance of Cu and other inevitable impurities, wherein Cu is more than 89.73%; further, the inevitable impurities include Al, si, sb, bi, etc. in an amount of 20ppm or less; preparing 50kg of furnace burden according to the proportion, wherein the furnace burden needs to remove dust and oil stains on the surface, and the furnace burden is dried by hot air or preheated by an oven to remove water vapor, and meanwhile, the furnace burden can also be properly cut or crushed to a proper size (wherein the total content of Cu + Sn + Zn + Pb + Co + Ni + Fe + P is more than 99.99%, and the content of other impurities is less than 0.01%, so that the purity of the copper alloy is ensured);
s2, melting furnace burden: putting the prepared furnace burden into a crucible or an alloy bin, simultaneously putting a clean and dry casting mold into a vacuum furnace at a designated position, closing a furnace cover, vacuumizing to below 10Pa, introducing high-purity argon to 10-30KPa, starting a medium-frequency induction power supply to heat for 30 minutes until the temperature reaches 1100-1500 ℃;
s3, ingot casting forming: the added furnace materials are gradually melted along with the induction heating, after all the furnace materials are melted, the furnace is shaken for 3 minutes under the heat preservation state, then the furnace is kept still for 10 minutes, then the furnace is vacuumized and exhausted once, and then the furnace is shaken for 1 minute, finally the liquid alloy is quickly cast into a mould, and the liquid alloy is cooled and solidified into an ingot in the mould in the protective atmosphere in the furnace;
s4, secondary melting: opening a furnace door to take out the mold and the cast ingot inside after the cast ingot is cooled to a lower temperature, taking the cast ingot as a new furnace charge for remelting, keeping the top of the new furnace charge (cast ingot) upward, putting the new furnace charge into a crucible (if the new furnace charge can be put after cutting, keeping the top of each section of furnace charge upward, putting the furnace charge into the crucible), cleaning dust and oil stains on the surface of the furnace charge before putting the new furnace charge, drying natural moisture, putting a clean and dry casting mold into a vacuum furnace for a designated position, closing a furnace cover, vacuumizing to below 10Pa, introducing high-purity argon to 10-30KPa, starting a medium-frequency induction power supply to heat for 30 minutes until the temperature reaches 1100-1500 ℃; before new furnace charge is put into the crucible, the surface defects of the cast ingot need to be removed;
s5, secondary ingot casting and forming: after the induction heating temperature rises to the melting point of the new furnace charge and starts to melt, the furnace shaking is used for accelerating the melting of the furnace charge, after all the new furnace charge is melted down, the furnace shaking is carried out for 1 minute under the heat preservation state, the liquid metal is immediately kept in the non-continuous flow state and is poured into a mold at a slow speed, the liquid metal is rapidly solidified in the mold in the protective atmosphere in the furnace by adopting a water cooling or air cooling mode, and the ingot casting is completed after the liquid metal is cooled to the room temperature.
Example three:
a casting method of a homogenized copper alloy ingot, comprising the steps of:
s1, burdening: weighing corresponding furnace burden according to the weight percentage of elements, wherein the furnace burden comprises the following components in percentage by weight: 4.10% of Sn, 3.70% of Zn, 1.90% of Pb, 0.03% of Co, 0.13% of Ni, 0.033% of Fe, 0.022% of P and the balance of Cu and other inevitable impurities, wherein Cu is more than 90.075%; further, the inevitable impurities include Al, si, sb, bi and the like, and the content is 20ppm or less; preparing 50kg furnace burden according to the proportion, wherein the furnace burden needs to remove dust and oil stains on the surface, and the furnace burden is dried by hot air or preheated by an oven to remove water vapor, and meanwhile, the furnace burden can also be properly cut or crushed to a proper size (wherein the total content of Cu + Sn + Zn + Pb + Co + Ni + Fe + P is more than 99.99%, the content of other impurities is less than 0.01%, and the purity of the copper alloy is ensured);
s2, melting furnace burden: putting the prepared furnace burden into a crucible or an alloy bin, simultaneously putting a clean and dry casting mold into a vacuum furnace at a designated position, closing a furnace cover, vacuumizing to below 10Pa, introducing high-purity argon to 10-30KPa, starting a medium-frequency induction power supply to heat for 30 minutes until the temperature reaches 1100-1500 ℃;
s3, ingot casting forming: the added furnace materials are gradually melted along with the induction heating, after all the furnace materials are melted, the furnace is shaken for 3 minutes under the heat preservation state, then the furnace is kept still for 10 minutes, then the furnace is vacuumized and exhausted once, and then the furnace is shaken for 1 minute, finally the liquid alloy is quickly cast into a mould, and the liquid alloy is cooled and solidified into an ingot in the mould in the protective atmosphere in the furnace;
s4, secondary melting: opening a furnace door to take out the mold and the cast ingot inside after the cast ingot is cooled to a lower temperature, taking the cast ingot as a new furnace charge for remelting, keeping the top of the new furnace charge (cast ingot) upward, putting the new furnace charge into a crucible (if the new furnace charge can be put after cutting, keeping the top of each section of furnace charge upward, putting the furnace charge into the crucible), cleaning dust and oil stains on the surface of the furnace charge before putting the new furnace charge, drying natural moisture, putting a clean and dry casting mold into a vacuum furnace for a designated position, closing a furnace cover, vacuumizing to below 10Pa, introducing high-purity argon to 10-30KPa, starting a medium-frequency induction power supply to heat for 30 minutes until the temperature reaches 1100-1500 ℃; before the new furnace charge is put into the crucible, the surface defects of the cast ingot need to be removed;
s5, secondary ingot casting and forming: after the induction heating temperature rises to the melting point of a new furnace charge and begins to melt, the furnace charge is accelerated to melt by shaking, when all the new furnace charge is melted down, the furnace is shaken for 1 minute under the heat preservation state, the liquid metal is kept in the non-continuous flow state immediately, the liquid metal is poured into a mold at a slow speed, the liquid metal is rapidly solidified in the mold by adopting a water cooling or air cooling mode in the protective atmosphere in the furnace, and the ingot casting is completed after the liquid metal is cooled to the room temperature.
In the first to third embodiments, the furnace charge in the step S2 is added according to the following addition sequence: (1) pure copper and metals or alloys with melting points close to or higher than that of pure copper; (2) a metal or alloy having a melting point lower than that of pure copper; (3) metals or alloys with strong chemical activity, easy oxidation and easy volatilization; specifically, (1) the furnace burden is placed in a crucible in advance, and (2) the furnace burden and (3) the furnace burden are added from a storage hopper in sequence after the furnace burden (1) is completely melted; the specific order may be appropriately adjusted according to the kind of the copper alloy and the composition control requirement.
In the first to third embodiments, in the step S3, the first rocking furnace can uniformly mix the metal components in the melt; standing for 10 minutes to enable the melt to fully react, and floating and discharging gas products or slag from the metal solution; and after standing, carrying out secondary furnace shaking, uniformly mixing the components of the melt again, and pouring into a mould for solidification.
In the first to third embodiments, in step S4, since the metal elements with large specific gravity in the liquid at the bottom of the crucible are seriously segregated during the first casting step in step S3, the metal elements are solidified at the top of the bar; and during the second casting step, the top of the bar is placed on the upper part of the furnace charge, which is beneficial to the fact that the segregation metal with large specific gravity is settled from top to bottom in the melt, so that the segregation metal is easier to mix and uniform (for convenience of understanding, during the first casting step, the metal element with large specific gravity in the crucible is deposited at the bottom of the crucible, and after solidification, the ingot at the bottom of the crucible is taken as the top of the new furnace charge, so that when the second casting step is performed, the top of the new furnace charge is required to be upward for melting, or in step S4, after the ingot is cooled to a lower temperature, a furnace door is opened to take out the mold and the ingot inside, the ingot is taken as the new furnace charge for re-melting, and the new furnace charge is turned and then placed in the crucible).
Referring to fig. 1 and 2, the ingot manufactured by the method of the first embodiment to the second embodiment, the most preferred embodiment of the present invention is the second embodiment, compared with the ingot manufactured by the conventional method, the ingot of the present invention has a uniform and fine metallographic structure at different positions, substantially the same component content, and the alloy elements are uniformly dissolved in the matrix or uniformly precipitated in the form of simple substance or compound in the crystal or in the crystal boundary; the copper alloy related to the invention contains one or more of the following alloy elements besides the main component Cu: zinc, tin, nickel, cobalt, aluminum, manganese, beryllium, silicon, phosphorus, magnesium, antimony, bismuth, tellurium, selenium, boron, lead, tungsten, molybdenum, tantalum, niobium, zirconium, iron, chromium, silver, rare earth elements, and the like; the invention relates to a process method which is mainly applicable to a die casting method, namely, an alloy ingredient is sequentially added into a crucible according to a certain process sequence for heating and melting, after the alloy is completely melted, and then refining processes such as necessary exhausting, deslagging, uniform stirring and the like are carried out, liquid metal is cast into a pre-placed die to be cooled and solidified to form a cast ingot; the process method related by the invention is not only limited to manufacturing copper alloy ingots, but also is suitable for manufacturing other alloy ingots with similar process characteristics.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical scope of the present invention and the equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
It is noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. A method of producing a homogenized copper alloy ingot, comprising the steps of:
s1, burdening: weighing furnace charge with corresponding mass according to the weight percentage of elements: 4.10 to 4 to 30 percent of Sn, 3.70 to 3.90 percent of Zn, 1.90 to 2.10 percent of Pb, 0.03 to 0.07 percent of Co, 0.13 to 0.17 percent of Ni, 0.033 to 0.037 percent of Fe, 0.022 to 0.028 percent of P, and the balance of Cu and other inevitable impurities, wherein the Cu content is more than 89.385 percent;
s2, melting furnace materials: adding furnace charge into a crucible for induction heating;
s3, ingot casting and forming: refining the completely melted furnace burden, casting the refined furnace burden into a mold, and solidifying liquid metal into a cast ingot in the mold;
s4, secondary melting: taking out the cast ingot from the mold, taking the cast ingot as a new furnace charge, and putting the dry and clean new furnace charge into a crucible for induction heating;
s5, secondary ingot casting and forming: refining the completely melted new furnace charge, casting the refined new furnace charge into a mold, and solidifying the liquid metal in the mold into an alloy ingot.
2. The method for manufacturing the homogenized copper alloy cast ingot according to claim 1, wherein in the step S1, the furnace burden with the corresponding mass is weighed according to the weight percentage of the elements: 4.20% of Sn, 3.80% of Zn, 2.0% of Pb, 0.05% of Co, 0.15% of Ni, 0.0357% of Fe, 0.025% of P and the balance of Cu and other inevitable impurities, wherein Cu is more than 89.73%.
3. The method of manufacturing a homogenized copper alloy ingot according to claim 1 or 2, wherein in step S1, each charge is subjected to surface dust and oil removal and hot air drying or oven preheating to remove moisture.
4. The method for manufacturing a homogenized copper alloy ingot according to claim 1, wherein in step S2, the charge is added into a crucible, meanwhile, a clean and dry casting mold is placed into a vacuum furnace, a furnace cover is closed, after vacuum pumping is performed until the pressure is below 10Pa, high-purity argon is introduced until 10-30KPa, a medium-frequency induction power supply is started to heat for 30 minutes, and the temperature reaches 1100-1500 ℃ until the charge is completely melted.
5. The method of claim 1, wherein in step S3, after the charge is completely melted, the furnace is shaken for 3 minutes under a heat preservation state, then kept still for 10 minutes, and then vacuumized and exhausted once, and then shaken for 1 minute, and finally the liquid alloy is rapidly cast into a mold, and the liquid alloy is cooled and solidified into the ingot in the mold in the protective atmosphere in the furnace.
6. The method for manufacturing a homogenized copper alloy ingot according to claim 1, wherein in step S4, the ingot manufactured in step S3 is used as a new charging material, the new charging material is placed in a crucible with the top facing upwards, a clean and dry casting mold is placed in a vacuum furnace, a furnace cover is closed, the vacuum furnace is vacuumized to below 10Pa, high-purity argon is introduced to 10-30KPa, a medium-frequency induction power supply is started to heat for 30 minutes, and the temperature reaches 1100-1500 ℃; wherein, before the new furnace charge is put in, the new furnace charge needs to remove dust and oil stains on the surface and dry natural moisture.
7. A method of manufacturing a homogenized copper alloy ingot according to claim 6, characterized in that: before the new furnace charge is placed into the crucible, the surface defects of the cast ingot need to be removed.
8. The method of claim 1, wherein in step S5, after the induction heating temperature rises to the melting point of the new charge and begins to melt, the melting of the new charge is accelerated by shaking the furnace, after all the charge has been melted down, the furnace is shaken for 1 minute while maintaining the temperature, the liquid metal is immediately kept in a non-continuous flow state, and then the casting is performed into a mold, the liquid metal is rapidly solidified in the mold by water cooling or air cooling in the protective atmosphere in the furnace, and the ingot manufacturing is completed after cooling to room temperature.
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