CN115418510B - Device and method for preparing copper alloy plate easy to oxidize in vacuum - Google Patents
Device and method for preparing copper alloy plate easy to oxidize in vacuum Download PDFInfo
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- CN115418510B CN115418510B CN202211079667.6A CN202211079667A CN115418510B CN 115418510 B CN115418510 B CN 115418510B CN 202211079667 A CN202211079667 A CN 202211079667A CN 115418510 B CN115418510 B CN 115418510B
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- 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
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- 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
- C22B9/04—Refining by applying a vacuum
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Abstract
The invention discloses a device and a method for preparing a copper alloy plate easy to oxidize in vacuum, and relates to the technical field of plate preparation, wherein the device comprises: the vacuum protection device, the first cavity, the smelting container, the electromagnetic coil and the plate forming device; the smelting container and the plate forming device are arranged in the first cavity, and the vacuum protection device is connected with the first cavity through a pipeline; the electromagnetic coil is arranged on the outer wall of the smelting container; the vacuum protection device vacuumizes the first cavity and introduces protective gas into the first cavity; the electromagnetic coil heats the smelting container; the smelting container contains copper and alloy, the copper and alloy are changed into liquid state from solid state under the heating of the electromagnetic coil, copper alloy liquid is obtained, and the copper alloy liquid is poured into the plate forming device; and shaping the copper alloy liquid by the plate shaping device to obtain the copper alloy plate. The invention not only reduces the preparation flow of the copper alloy plate, but also improves the quality of the copper alloy plate.
Description
Technical Field
The invention relates to the technical field of plate preparation, in particular to a device and a method for preparing an easily oxidized copper alloy plate in vacuum.
Background
The traditional copper alloy section generally needs smelting, multi-pass deformation, heat treatment, surface treatment and other steps, and in order to achieve ideal structure and performance, the deformation process comprises more than ten passes of hot rough rolling, hot intermediate rolling, hot finish rolling, cold finish rolling and the like, the corresponding heat treatment process is needed after rolling, the whole process investment is large, the cost is high, the production line is long, the energy consumption is high, and the energy consumption is not in line with the current energy-saving carbon-reducing green production targets. As shown in fig. 2, the preparation of a thin strip of normal brass requires at least 20 steps to obtain a shaped sheet, which is more cumbersome for high-end copper thin strips.
In the prior art, if the short-process preparation of the copper alloy is to be realized, a non-vacuum vertical casting and rolling means is mostly adopted, but the non-vacuum smelting copper alloy is easy to oxidize and absorb air, and the burning loss of low-melting-point alloy elements is accompanied, so that the air holes and oxide inclusions in the copper alloy finished product are more, and the quality is poor.
Disclosure of Invention
The invention aims to provide a device and a method for preparing an easily oxidized copper alloy plate in vacuum, which can reduce the preparation flow of the copper alloy plate and improve the quality of the copper alloy plate.
In order to achieve the above object, the present invention provides the following solutions:
an apparatus for vacuum preparing a copper alloy sheet material susceptible to oxidation, comprising: the vacuum protection device, the first cavity, the smelting container, the electromagnetic coil and the plate forming device;
the smelting container and the plate forming device are arranged in the first cavity, and the vacuum protection device is connected with the first cavity through a pipeline; the electromagnetic coil is arranged on the outer wall of the smelting container;
the vacuum protection device is used for vacuumizing the first cavity and introducing protective gas into the first cavity;
the electromagnetic coil is used for heating the smelting container;
the smelting container is used for containing copper and alloy, and under the heating of the electromagnetic coil, the copper and the alloy are changed from solid state to liquid state to obtain copper alloy liquid, and the copper alloy liquid is poured into the plate forming device;
the plate forming device is used for shaping the copper alloy liquid to obtain the copper alloy plate.
Optionally, the device for preparing the copper alloy sheet material easy to oxidize in vacuum further comprises: a thermocouple; the thermocouple is arranged in a slot on the side wall of the smelting container;
the thermocouple is for measuring an internal temperature of the smelting vessel.
Optionally, the device for preparing the copper alloy sheet material easy to oxidize in vacuum further comprises: an ultrasonic device;
when the internal temperature of the smelting container is higher than a first temperature, the ultrasonic device carries out ultrasonic treatment on the copper alloy liquid; the first temperature is greater than the liquidus of the copper alloy liquid; the difference between the first temperature and the liquidus line of the copper alloy liquid is in a preset temperature range.
Optionally, the vacuum protection device comprises: a vacuum device; the vacuum device is connected with the first cavity through a first pipeline;
the vacuum device is used for vacuumizing the first cavity.
Optionally, the vacuum protection device comprises: protecting the gas cylinder; the protective gas cylinder is connected with the first cavity through a second pipeline;
the protective gas cylinder is used for introducing protective gas into the first cavity.
Optionally, the sheet forming apparatus includes: launder and water-cooled roller; the water-cooled roller is arranged at the outlet of the launder;
the launder is used for containing the poured copper alloy liquid when the internal temperature of the smelting container reaches the pouring temperature of the copper alloy liquid;
the water-cooled roller is used for cooling and shaping the copper alloy liquid flowing in from the launder to obtain the copper alloy plate.
Optionally, the device for preparing the copper alloy sheet material easy to oxidize in vacuum further comprises: the device comprises a second cavity, a water-cooled roller, a traction device and a winding device; the second cavity is communicated with the first cavity; the water-cooled roller is arranged in the first cavity, and the traction device is arranged in the second cavity; the water-cooling roller, the traction device and the winding device are sequentially arranged at the outlet of the launder according to the flow direction of the copper alloy liquid;
the traction device is used for sending the copper alloy plate out of the second cavity;
the winding device is used for accommodating the copper alloy plate.
Optionally, the vacuum device comprises: a vacuum pump and a vacuum valve;
one end of the vacuum pump is connected with the first cavity, the other end of the vacuum pump is connected with one end of the vacuum valve, and the other end of the vacuum valve is connected with the first cavity.
Optionally, the shielding gas is argon.
A method for preparing a copper alloy sheet material easy to oxidize in vacuum, the method being applied to the device for preparing the copper alloy sheet material easy to oxidize in vacuum according to any one of the above steps, the method comprising:
placing copper raw material in a smelting vessel;
setting the first cavity and the second cavity to be in a vacuum environment;
smelting the copper raw material;
when the internal temperature of the smelting container reaches 1200 ℃, adding alloy solids according to a set proportion, and continuing heating and smelting to obtain copper alloy liquid;
tilting the smelting container, pouring the copper alloy liquid into a launder, entering a gap of a water-cooled roller through the launder, and forming under the cooling action of the water-cooled roller to obtain the copper alloy plate.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention discloses a device and a method for preparing a copper alloy plate easy to oxidize in vacuum, wherein the device comprises the following steps: the vacuum protection device, the first cavity, the smelting container, the electromagnetic coil and the plate forming device; the smelting container and the plate forming device are arranged in the first cavity, and the vacuum protection device is connected with the first cavity through a pipeline; the electromagnetic coil is arranged on the outer wall of the smelting container; the vacuum protection device vacuumizes the first cavity and introduces protective gas into the first cavity; the electromagnetic coil heats the smelting container; the smelting container contains copper and alloy, the copper and alloy are changed into liquid state from solid state under the heating of the electromagnetic coil, copper alloy liquid is obtained, and the copper alloy liquid is poured into the plate forming device; and shaping the copper alloy liquid by the plate shaping device to obtain the copper alloy plate. The invention melts copper and alloy in vacuum, reduces copper oxidation, reduces the preparation flow of copper alloy plate, and improves the quality of copper alloy plate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an apparatus for vacuum producing a copper alloy sheet susceptible to oxidation according to an embodiment of the present invention;
FIG. 2 is a flow chart of a conventional method for preparing a thin strip of plain brass;
fig. 3 is a flowchart of a method for preparing a copper alloy sheet easy to oxidize in vacuum according to an embodiment of the present invention.
Description of the drawings: the device comprises a first cavity, a 2-smelting container, a 3-electromagnetic coil, a 4-ultrasonic device, a 5-protection gas cylinder, a 6-launder, a 7-water-cooled roller, a 8-second cavity, a 9-traction device, a 10-winding device, a 11-vacuum pump, a 12-vacuum valve and a 13-resistance wire.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a device and a method for preparing an easily oxidized copper alloy plate in vacuum, aims to reduce the preparation flow of the copper alloy plate and improve the quality of the copper alloy plate, and can be applied to the technical field of plate preparation.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Fig. 1 is a schematic diagram of an apparatus for vacuum-preparing a copper alloy sheet material easy to oxidize according to an embodiment of the present invention. As shown in fig. 1, the apparatus for vacuum-preparing a copper alloy sheet material susceptible to oxidation in this embodiment includes: the vacuum protection device, the first cavity 1, the smelting container 2, the electromagnetic coil 3 and the plate forming device.
The smelting container 2 and the plate forming device are arranged in the first cavity 1, and the vacuum protection device is connected with the first cavity 1 through a pipeline; the electromagnetic coil 3 is arranged on the outer wall of the smelting vessel 2.
The vacuum protection device is used for vacuumizing the first cavity 1 and introducing protective gas into the first cavity 1.
The electromagnetic coil 3 is used for heating the smelting vessel 2.
The smelting vessel 2 is used for containing copper and alloy, and under the heating of the electromagnetic coil 3, the copper and alloy are changed from solid state to liquid state, copper alloy liquid is obtained, and the copper alloy liquid is poured into the plate forming device.
The plate forming device is used for shaping the copper alloy liquid to obtain the copper alloy plate.
As an alternative embodiment, the apparatus for vacuum preparing a copper alloy sheet material easy to oxidize further comprises: a thermocouple; the thermocouple is arranged in a slot on the side wall of the smelting container 2;
the thermocouple is used to measure the internal temperature of the smelting vessel 2.
As an alternative embodiment, the apparatus for vacuum preparing a copper alloy sheet material easy to oxidize further comprises: an ultrasound device 4.
When the internal temperature of the smelting container 2 is higher than the first temperature, the ultrasonic device 4 carries out ultrasonic treatment on the copper alloy liquid; the first temperature is greater than the liquidus line of the copper alloy liquid; the difference between the first temperature and the liquidus line of the copper alloy liquid is in a preset temperature range.
Specifically, the ultrasonic device 4 is a liftable ultrasonic device.
Specifically, the preset temperature range is 50-100 ℃.
As an alternative embodiment, the vacuum protection device comprises: a vacuum device; the vacuum device is connected with the first cavity 1 through a first pipeline.
The vacuum means is used to evacuate the first chamber 1.
As an alternative embodiment, the vacuum protection device comprises: a protective gas cylinder 5; the protective gas cylinder 5 is connected with the first cavity 1 through a second pipeline.
The protective gas cylinder 5 is used for introducing protective gas into the first cavity 1.
As an alternative embodiment, the sheet forming apparatus includes: a launder 6 and a water-cooled roller 7; the water-cooled roller 7 is arranged at the outlet of the launder 6.
The launder 6 is used for containing the poured copper alloy liquid when the internal temperature of the smelting container 2 reaches the casting temperature of the copper alloy liquid;
the water-cooling roller is used for cooling and shaping the copper alloy liquid flowing in from the launder 8 to obtain the copper alloy plate.
Specifically, the device for preparing the copper alloy plate easy to oxidize in vacuum further comprises: a controller (not shown in fig. 2) and a pouring device (not shown in fig. 2); the thermocouple and the dumping device are connected with the controller, and the smelting container 2 is arranged on the dumping device; the thermocouple sends the internal temperature of the smelting vessel 2 to the controller, and when the internal temperature of the smelting vessel 2 reaches the pouring temperature of the copper alloy liquid, the controller outputs a control signal to control the pouring device to operate so that the smelting vessel 2 pours the copper alloy liquid into the inlet of the runner 6 (at this time, the position of the smelting vessel 2 is as shown in an empty smelting vessel in fig. 2).
As an alternative embodiment, the apparatus for vacuum preparing a copper alloy sheet material easy to oxidize further comprises: the second cavity 8, the water-cooled roller 7, the traction device 9 and the winding device 10; the second cavity 8 is communicated with the first cavity 1; the water-cooled roller 7 is arranged in the first cavity 1, and the traction device 9 is arranged in the second cavity 8; the water-cooling roller 7, the traction device 9 and the winding device 10 are sequentially arranged at the outlet of the launder 6 according to the flow direction of the copper alloy liquid.
The pulling device 9 is used for feeding the copper alloy sheet out of the second cavity 8. Specifically, the traction device 9 is a traction roller.
The winding device 10 is used for accommodating copper alloy plates.
As an alternative embodiment, the vacuum apparatus includes: a vacuum pump 11 and a vacuum valve 12.
One end of the vacuum pump 11 is connected to the first chamber 1, the other end of the vacuum pump 11 is connected to one end of the vacuum valve 12, and the other end of the vacuum valve 12 is connected to the first chamber 1.
As an alternative embodiment, the shielding gas is argon.
As an alternative embodiment, the smelting vessel 2 is a smelting crucible.
The working flow of the device for preparing the copper alloy plate easy to oxidize in vacuum is as follows:
(1) The copper raw material (solid state) was placed in a crucible, and the furnace chambers (first chamber 1 and second chamber 8) were evacuated to 10 using a vacuum pump 11 -2 Pa, the protective gas cylinder 5 fills argon into the furnace chamber for protection.
(2) Copper raw material was melted by induction heating of the electromagnetic coil 3, and at the same time, the launder 6 was preheated to 800 ℃ by means of the resistance wire 13.
(3) When the smelting temperature measured by the thermocouple (namely the internal temperature of a smelting device (smelting crucible)) is 1200 ℃, adding alloy solids according to a set proportion, and continuing to heat and smelt to obtain copper alloy liquid, wherein the smelting time is 5-20min from the beginning of adding the alloy solids.
(4) After smelting is complete, the smelting temperature is adjusted to be 50 ℃ -100 ℃ (the liquidus of copper alloy liquid is prepared, different copper alloys are different due to different alloy elements), the ultrasonic tool head (namely the ultrasonic device 4) is lowered, and the copper alloy liquid is subjected to ultrasonic treatment for 5-10min, so that the effects of degassing, removing impurities, improving the wettability of metals and reinforcing particles in the copper alloy liquid and reducing the segregation of trace elements and reinforcing phases are achieved.
(5) After the ultrasonic treatment is finished, the ultrasonic tool head is lifted, the temperature of the copper alloy liquid is measured and controlled to reach the casting temperature (by adjusting the heating power of the electromagnetic coil 3, the power is high, the power is low, and the temperature is reduced), and the casting temperature is about 100 ℃ on the liquid phase line.
(6) Tilting the melting crucible, flowing copper alloy liquid into the launder 6, entering the roller gap through the launder 6, and forming under the cooling action of the water-cooled roller 7.
(7) The formed copper alloy plate is driven by a traction roller (a traction device 9), and can be wound outside the furnace by using a winding device 10 (vacuum flanges are arranged at two ends of the second cavity 8 so as to ensure that air cannot enter the vacuum cavity in the process of pulling out the copper alloy plate) through a transition region (a second cavity 8), and can be naturally placed outside the furnace.
(8) And closing the device after all the plates are cooled and molded.
Cu-TiB 2 Particle reinforced copper alloy sheet:
TiB during normal smelting and solidification 2 The titanium diboride particles have sufficient time to grow up to TiB in the cast ingot 2 The particles are typically 100-200 μm and are easily agglomerated without changing the particle size during subsequent deformation and heat treatment.
Cu-TiB prepared by the device of the invention 2 The plate material is made of a material,
(1) Ultrasonic treatment before casting can promote TiB 2 Promote TiB reaction 2 Is favorable for refining TiB 2 Particles, the ultrasonic treatment is beneficial to improving TiB 2 And Cu wettability, promote TiB 2 Evenly distributed in the melt.
(2) After smelting, quick solidification is carried out, tiB 2 The grain size is 1-8 mu m, and the refining effect is obvious.
Cu-Cr (chromium) -Zr (zirconium) alloy plate:
the Cu-Cr-Zr alloy is not vacuum smelted, cr and Zr, especially Zr elements are easy to burn out, and because the addition amount is less (less than 1 percent (mass fraction)), the elements are easy to gather in the cast ingot, and the primary phase size is coarse.
Fig. 3 is a flowchart of a method for preparing a copper alloy sheet easy to oxidize in vacuum according to an embodiment of the present invention. As shown in fig. 3, the method for preparing the copper alloy sheet material easy to oxidize in vacuum in the embodiment is applied to a device for preparing the copper alloy sheet material easy to oxidize in vacuum, and the method comprises the following steps:
step 101: copper raw material is placed in a smelting vessel.
Step 102: the first cavity and the second cavity are set to a vacuum environment.
Step 103: smelting copper raw material.
Step 104: when the internal temperature of the smelting container reaches 1200 ℃, adding alloy solids according to a set proportion, and continuously heating and smelting to obtain copper alloy liquid.
Step 105: and tilting the smelting container, pouring copper alloy liquid into the launder, entering a gap of the water-cooling roller through the launder, and forming under the cooling action of the water-cooling roller to obtain the copper alloy plate.
By utilizing the device in the invention, the ultrasonic treatment is used in the smelting process, so that the uniform distribution of Cr and Zr can be promoted, and the primary phase is refined. Meanwhile, the short-process preparation of the Cu-Cr-Zr alloy is realized by utilizing a rapid prototyping technology, the process flow is greatly reduced, and the time and the cost are saved.
Besides the preparation of the alloy plate, the device provided by the invention can be used for preparing copper alloy plate strips, and also can be used for preparing plate strips of easily-oxidized materials such as aluminum alloy, magnesium alloy, amorphous material and the like.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the above examples being provided only to assist in understanding the device and its core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (5)
1. A device for preparing a copper alloy sheet material easy to oxidize in vacuum, which is characterized by comprising: the vacuum protection device, the first cavity, the smelting container, the electromagnetic coil and the plate forming device;
the smelting container and the plate forming device are arranged in the first cavity, and the vacuum protection device is connected with the first cavity through a pipeline; the electromagnetic coil is arranged on the outer wall of the smelting container;
the vacuum protection device is used for vacuumizing the first cavity and introducing protective gas into the first cavity;
the electromagnetic coil is used for heating the smelting container;
the smelting container is used for containing copper and alloy, and under the heating of the electromagnetic coil, the copper and the alloy are changed from solid state to liquid state to obtain copper alloy liquid, and the copper alloy liquid is poured into the plate forming device;
the plate forming device is used for shaping the copper alloy liquid to obtain a copper alloy plate;
the device for preparing the copper alloy plate easy to oxidize in vacuum further comprises: a thermocouple; the thermocouple is arranged in a slot on the side wall of the smelting container;
the thermocouple is used for measuring the internal temperature of the smelting container;
the device for preparing the copper alloy plate easy to oxidize in vacuum further comprises: an ultrasonic device;
when the internal temperature of the smelting container is higher than a first temperature, the ultrasonic device carries out ultrasonic treatment on the copper alloy liquid; the first temperature is greater than the liquidus of the copper alloy liquid; the difference value between the first temperature and the liquidus line of the copper alloy liquid is in a preset temperature range;
the sheet forming apparatus includes: launder and water-cooled roller; the water-cooled roller is arranged at the outlet of the launder;
the launder is used for containing the poured copper alloy liquid when the internal temperature of the smelting container reaches the pouring temperature of the copper alloy liquid;
the water-cooled roller is used for cooling and shaping the copper alloy liquid flowing in from the launder to obtain the copper alloy plate;
the device for preparing the copper alloy plate easy to oxidize in vacuum further comprises:
the device comprises a second cavity, a water-cooled roller, a traction device and a winding device;
the second cavity is communicated with the first cavity; the water-cooled roller is arranged in the first cavity, and the traction device is arranged in the second cavity; the water-cooling roller, the traction device and the winding device are sequentially arranged at the outlet of the launder according to the flow direction of the copper alloy liquid;
the traction device is used for sending the copper alloy plate out of the second cavity;
the winding device is used for accommodating the copper alloy plate;
the working flow of the device for preparing the copper alloy plate easy to oxidize in vacuum is as follows:
placing copper in a smelting container, and vacuumizing the first cavity and the second cavity to 10 by using a vacuum protection device -2 Pa, and filling argon into the first cavity and the second cavity for protection;
smelting copper by induction heating of an electromagnetic coil, and preheating a launder to 800 ℃;
when the internal temperature of the smelting container measured by the thermocouple is 1200 ℃, adding alloy according to a set proportion, and continuing to heat and smelt to obtain copper alloy liquid, wherein the smelting time is 5-20min from the beginning of adding alloy solid;
after smelting fully, adjusting the internal temperature to 50-100 ℃ above liquidus, lowering an ultrasonic device, and carrying out ultrasonic treatment on the copper alloy liquid for 5-10 min;
after the ultrasonic treatment is finished, the ultrasonic device is lifted, the temperature of the copper alloy liquid is measured and controlled to reach the casting temperature, and the casting temperature is 100 ℃ on a liquid phase line;
tilting the smelting container, flowing copper alloy liquid into the launder, entering a roller gap through the launder, and forming under the cooling action of the water-cooled roller;
the formed copper alloy plate is driven by a traction device, and is rolled out of the furnace through a second cavity by using a rolling device;
and closing the device after all the plates are cooled and molded.
2. The apparatus for vacuum producing a copper alloy sheet material susceptible to oxidation according to claim 1, wherein the vacuum protecting apparatus comprises: a vacuum device; the vacuum device is connected with the first cavity through a first pipeline;
the vacuum device is used for vacuumizing the first cavity.
3. The apparatus for vacuum producing a copper alloy sheet material susceptible to oxidation according to claim 1, wherein the vacuum protecting apparatus comprises: protecting the gas cylinder; the protective gas cylinder is connected with the first cavity through a second pipeline;
the protective gas cylinder is used for introducing protective gas into the first cavity.
4. The apparatus for vacuum producing a copper alloy sheet material susceptible to oxidation according to claim 2, wherein the vacuum apparatus comprises: a vacuum pump and a vacuum valve;
one end of the vacuum pump is connected with the first cavity, the other end of the vacuum pump is connected with one end of the vacuum valve, and the other end of the vacuum valve is connected with the first cavity.
5. A method for preparing a copper alloy sheet material susceptible to oxidation in vacuum, which is applied to the apparatus for preparing a copper alloy sheet material susceptible to oxidation in vacuum according to any one of claims 1 to 4, and comprises:
placing copper raw material in a smelting vessel;
setting the first cavity and the second cavity to be in a vacuum environment;
smelting the copper raw material;
when the internal temperature of the smelting container reaches 1200 ℃, adding alloy solids according to a set proportion, and continuing heating and smelting to obtain copper alloy liquid;
tilting the smelting container, pouring the copper alloy liquid into a launder, entering a gap of a water-cooled roller through the launder, and forming under the cooling action of the water-cooled roller to obtain the copper alloy plate.
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| CN113245530A (en) * | 2021-04-09 | 2021-08-13 | 江苏科岩特种金属材料有限公司 | Vacuum continuous smelting casting method for copper alloy |
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