CN114574906A - Zinc electrodeposition cathode plate aluminum integral beam and preparation method thereof - Google Patents
Zinc electrodeposition cathode plate aluminum integral beam and preparation method thereof Download PDFInfo
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 76
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000004070 electrodeposition Methods 0.000 title claims abstract description 37
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000011701 zinc Substances 0.000 title claims abstract description 31
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000003466 welding Methods 0.000 claims abstract description 52
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000010949 copper Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 29
- 238000005266 casting Methods 0.000 claims abstract description 26
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052802 copper Inorganic materials 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 13
- 238000007711 solidification Methods 0.000 claims abstract description 11
- 230000008023 solidification Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 26
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- 238000004880 explosion Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005253 cladding Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000005363 electrowinning Methods 0.000 claims 4
- 238000002203 pretreatment Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 14
- 239000002360 explosive Substances 0.000 abstract description 7
- 230000007704 transition Effects 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 5
- 239000002893 slag Substances 0.000 abstract description 3
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 238000005219 brazing Methods 0.000 description 5
- 238000005868 electrolysis reaction Methods 0.000 description 5
- 230000000630 rising effect Effects 0.000 description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/02—Electrodes; Connections thereof
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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
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
-
- 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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses an aluminum integral beam of a zinc electrodeposition cathode plate and a preparation method thereof. The zinc electrodeposition cathode plate aluminum integral beam is formed by welding a low-pressure cast aluminum beam, a lifting lug and a copper-aluminum conductive piece through friction stir welding, the conductivity of the zinc electrodeposition cathode plate aluminum integral beam is more than 29.90, the service life of the zinc electrodeposition cathode plate aluminum integral beam is more than 14 months, and the average temperature of the contact position of a mesh row and copper in the electrodeposition process is lower than 53 ℃. The preparation method comprises the steps of pretreatment, mold filling, pressure maintaining solidification and post-treatment. The low-pressure casting process adopted by the invention has no casting defects such as shrinkage cavity, slag inclusion, bubbles and the like, the copper-aluminum composite conductive head adopts explosive welding or flash welding according to the use occasions, the conductivity of a copper-aluminum transition region is ensured, and the whole integral cross beam is only welded with the composite conductive part by friction stir welding, so that the performance stability of the integral cross beam is ensured, the processing procedures are reduced, and the processing cost of the cathode plate is reduced.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to an aluminum integral cross beam of a zinc electrodeposition cathode plate and a preparation method thereof.
Background
In the zinc electrodeposition industry, because the current in the electrodeposition process is large, if the cathode plate aluminum beam has defects in the preparation process, a large amount of electric energy is consumed in the electrodeposition process, the copper-aluminum transition conductive piece can adopt the processes of explosion welding, flash welding, friction welding, tin brazing, copper-aluminum brazing, gravity casting and the like according to the linking method of the copper-aluminum transition conductive piece and the busbar, and other components of the aluminum beam are generally prepared by adopting the processes of gravity casting, pressure casting and section bar and welding. The pressure and gravity casting process is adopted, casting defects such as bubbles, shrinkage cavities, slag inclusion and the like are easily generated particularly when casting parts with larger sizes are prepared, particularly when the copper-aluminum composite conductive piece and the integral beam are formed in a one-step die-casting mode, due to insufficient pressure, different copper-aluminum shrinkage rates and the like, the copper-aluminum interface is difficult to compound, and the using effect and the trial service life of the integral beam are seriously influenced.
Disclosure of Invention
The first purpose of the invention is to provide an aluminum integral beam of a zinc electrodeposition cathode plate; the second purpose is to provide the preparation method of the zinc electrodeposition cathode plate aluminum integral beam.
The first purpose of the invention is realized by welding the zinc electrodeposition cathode plate aluminum integral beam by a low-pressure cast aluminum beam, a lifting lug and a copper-aluminum conductive piece through friction stir welding, wherein the conductivity of the zinc electrodeposition cathode plate aluminum integral beam is more than 29.90, the service life is more than 14 months, and the average temperature of the contact position of a mesh row and copper in the electrodeposition process is lower than 53 ℃.
The second purpose of the invention is realized by the steps of pretreatment, mold filling, pressure-maintaining solidification and post-treatment, and specifically comprises the following steps:
A. pretreatment: melting aluminum alloy to obtain aluminum liquid a;
B. filling a mold: the aluminum liquid a enters the integral crossbeam cavity die at the flow velocity of 5-15cm/s until the filling is finished;
C. pressure maintaining solidification: after the mold filling is finished, increasing the pressure in the mold cavity to 0.08-0.30MPa, maintaining the pressure, and performing reinforced solidification to obtain an integral beam b;
D. and (3) post-treatment: and cooling the integral beam b to remove burrs, and welding the integral beam b with the copper-aluminum conductive piece by friction stir welding to obtain the target zinc electrodeposition cathode plate aluminum integral beam.
Explosion welding: the explosive welding process is characterized in that a copper block with a smooth surface is tightly contacted with an aluminum block, a proper amount of explosive is filled in the copper block, the explosive is detonated to generate high-temperature heat instantly, the copper surface and the aluminum surface are melted, and the copper and the aluminum are welded in a contact mode through extrusion.
Flash butt welding: the flash butt welding principle is that a copper plate and an aluminum plate are rapidly melted under the action of strong current, and then the copper and the aluminum are melted together under the action of mechanical upsetting pressure.
Friction welding: the friction welding principle is that the welding surfaces of copper and aluminum are melted at high temperature under the high-speed rotation of a copper rod and an aluminum rod, and the copper and the aluminum are combined together through pressure maintaining and upsetting.
Tin soldering: the principle of the tin soldering process is that a thin copper sheet and aluminum equipment are clamped tightly, and the copper sheet is soldered on an aluminum plate after special processing and mechanical compression joint of tin solder.
Copper-aluminum brazing: copper-aluminum brazing is a new process for brazing and welding copper materials and aluminum materials, and has the advantages that the welding position cannot be broken, the conductivity is good, manual welding is achieved, the operation is simple, less equipment is invested, and the welding efficiency is low.
Gravity casting: the gravity casting principle is that a copper block is placed in a mold, liquid aluminum is poured into the mold, and the copper block is wrapped by the aluminum to form the copper-aluminum conductive transition piece. The reason is that the volume shrinkage is generated in the cooling and solidification process of liquid aluminum, the copper-aluminum contact surface is layered to form a gap, acid mist in the electrodeposition process can enter the gap to influence the conductivity of the gap, and then the conductive transition piece generates heat to influence the use of a negative plate.
The low-pressure casting process adopted by the invention has no casting defects such as shrinkage cavity, slag inclusion, bubbles and the like, the copper-aluminum composite conductive head adopts explosive welding or flash welding according to the use occasions, the conductivity of a copper-aluminum transition region is ensured, and the whole integral cross beam is only welded with the composite conductive part by friction stir welding, so that the performance stability of the integral cross beam is ensured, the processing procedures are reduced, and the processing cost of the cathode plate is reduced.
The zinc electrodeposition cathode plate aluminum integral beam comprises a low-pressure casting aluminum beam and a lifting lug, and explosion welding or flash welding copper-aluminum conductive pieces, wherein the integral aluminum beam is formed by welding the low-pressure casting aluminum beam and the lifting lug, and the explosion welding or flash welding copper-aluminum conductive pieces through friction stir welding.
The method comprises the following steps:
a. putting the aluminum alloy meeting the composition into an aluminum melting furnace, filling compressed air into a low-pressure casting machine heat-preserving furnace to form pressure after the aluminum is melted, and pressing molten aluminum into a liquid lifting pipe in a liquid lifting pipe under the drive of the pressure, wherein the liquid lifting speed is 5-15 cm/s;
b. along with the gradual increase of the pressure, the aluminum liquid slowly enters the integral beam cavity die and is gradually filled (the flow rate of the aluminum liquid needs to be controlled, the phenomenon that turbulence is caused due to overhigh speed and cold shut is formed due to overlow speed is avoided), the filling speed is 20-40cm/s, and the pressurizing speed is 0.002-0.004 MPa/s;
c. after the mold filling is finished, further increasing the pressure in the cavity to0.08-0.30MPa Pressure maintaining is carried out for 1-2 timesminThe wind-water pipes and the like arranged around the die start to work according to the process requirements to carry out reinforced solidification;
d. after the integral beam is solidified, the pressure on the liquid level in the crucible is removed, so that the liquid which is not solidified in the liquid lifting pipe and the pouring gate falls back into the crucible, and the beam is taken out after the liquid is cooled for 1-2min after the pressure is removed;
f. after cooling and deburring the beam, welding the beam with the required copper-aluminum conductive piece by friction stir welding; the inclination angle of the stirring head is 2-4 degrees, the rotating speed of the stirring head is 800-1200r/min, the welding speed is 50-80mm/min, and the pressing depth is 2-3 mm;
the invention has the beneficial effects that: the aluminum beam is prepared by low-pressure casting, the product has good appearance quality, few internal defects and strong conductivity, the number of welding points is reduced, the strength of the beam is improved, and the production cost is low. The copper-aluminum conductive piece is independently prepared in an explosion cladding or flash welding mode, so that the problems of insufficient pressure and low bonding strength caused by different metal shrinkage in the die-casting process are solved, the interface resistance is reduced, and the heating phenomenon in the use process is obviously reduced.
Drawings
FIG. 1 is a schematic view of an aluminum integrated beam product of a zinc electrodeposition cathode plate;
fig. 2 is a schematic view of a conventional aluminum beam product.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to be limiting in any way, and any modifications or alterations based on the teachings of the present invention are intended to fall within the scope of the present invention.
The zinc electrodeposition cathode plate aluminum integral beam is formed by welding a low-pressure cast aluminum beam, a lifting lug and a copper-aluminum conductive piece through friction stir welding, the conductivity of the zinc electrodeposition cathode plate aluminum integral beam is over 29.90, the service life is over 14 months, and the average temperature of the contact position of a mesh row and copper in the electrodeposition process is lower than 53 ℃.
The friction welding is independently prepared by adopting an explosion cladding or flash welding mode.
The low-pressure cast aluminum beam comprises the following chemical components: si is more than or equal to 0.15 percent and less than or equal to 0.35 percent, Fe is more than or equal to 0.25 percent and less than or equal to 0.45 percent, Cu is more than or equal to 0.03 percent and less than or equal to 0.08 percent, Mn is more than or equal to 0.02 percent and less than or equal to 0.05 percent, Mg is more than or equal to 0.02 percent and less than or equal to 0.05 percent, and the balance is Al.
The chemical components of the lifting lug are as follows: si is more than or equal to 0.15 percent and less than or equal to 0.35 percent, Fe is more than or equal to 0.25 percent and less than or equal to 0.45 percent, Cu is more than or equal to 0.03 percent and less than or equal to 0.08 percent, Mn is more than or equal to 0.02 percent and less than or equal to 0.05 percent, Mg is more than or equal to 0.02 percent and less than or equal to 0.05 percent, and the balance is Al.
The copper-aluminum conductive piece comprises the following chemical components: fe is less than or equal to 0.005 percent, Pb is less than or equal to 0.005 percent, S is less than or equal to 0.005 percent, the rest single term is less than or equal to 0.002 percent, and Cu is less than or equal to 99.9 percent.
The invention relates to a preparation method of an aluminum integral beam of a zinc electrodeposition cathode plate, which comprises the steps of pretreatment, mold filling, pressure maintaining solidification and post-treatment, and specifically comprises the following steps:
A. pretreatment: melting the aluminum alloy to obtain aluminum liquid a; the preheating temperature of the metal film is 250-300 ℃;
B. filling: the molten aluminum a enters the integral crossbeam cavity die at the flow speed of 5-15cm/s until the filling is finished; wherein the rising speed of the aluminum liquid in the liquid rising pipe is 5-15cm/s, the filling speed is 20-40cm/s, and the pressurizing speed is 0.002-0.004 MPa/s;
C. pressure maintaining and solidifying: after the mold filling is finished, increasing the pressure in the mold cavity to 0.08-0.30MPa, maintaining the pressure, and performing reinforced solidification for 1-2min to obtain an integral beam b; after the casting is solidified, the pressure on the liquid level in the crucible is removed, so that the liquid which is not solidified in the liquid lifting pipe and the pouring gate falls back into the crucible, and the casting is cooled for 1-2min to open the mold after the pressure is released;
D. and (3) post-treatment: and cooling the integral beam b to remove burrs, and welding the integral beam b with the copper-aluminum conductive piece by friction stir welding to obtain the target zinc electrodeposition cathode plate aluminum integral beam.
The chemical components of the aluminum alloy in the step A are as follows: si is more than or equal to 0.15 percent and less than or equal to 0.35 percent, Fe is more than or equal to 0.25 percent and less than or equal to 0.45 percent, Cu is more than or equal to 0.03 percent and less than or equal to 0.08 percent, Mn is more than or equal to 0.02 percent and less than or equal to 0.05 percent, Mg is more than or equal to 0.02 percent and less than or equal to 0.05 percent, and the balance is Al.
The pretreatment is that the aluminum alloy is put into an aluminum melting furnace, after the aluminum is melted, compressed air is filled into a low-pressure casting machine heat preservation furnace to form pressure, and aluminum water is pressed into a liquid lifting pipe under the drive of the pressure. The rising speed of the aluminum liquid in the liquid rising pipe is 5-15cm/s, the mold filling speed is 20-40cm/s, the pressurizing speed is 0.002-0.004MPa/s, the pressurizing pressure is 0.03-0.08MPa, the pressure maintaining time is 1-2min, the pressure on the liquid level in the crucible is removed after the casting is solidified, the liquid which is not solidified in the liquid rising pipe and the pouring gate is made to fall back into the crucible, and the mold is opened after the pressure is relieved and cooled for 1-2 min.
The reinforced solidification is at the joint of the lifting lug and the cross beam and the stress concentration area of the lifting lug.
The invention is further illustrated by the following specific examples:
example 1
A company produces zinc industrially, the electrolysis period is 24 hours, and the current density is 420A/m2The negative plate is made of aluminum, and the size of the negative plate is 1.2m2The copper-aluminum beam manufacturing process comprises the steps of welding the conductive head, the lifting lug and the beam together, detecting the overall conductivity of a product to be 28.54, carrying out sampling inspection on the same batch of products, wherein the product percent of pass is about 99.8%, the service life is 12.8 months, the average temperature of the contact position of a busbar and copper in the electrodeposition process is 54.2 ℃, the number of corrosion gaps appears on a copper-aluminum composite interface is 2.4%, and the number of bending and lifting lug fracture appears on the beam is 7.8%.
Under the same electrolysis condition, the cross beam and explosion composite conductive head is prepared by low-pressure casting, the overall conductivity of the detection result is 30.12, the product percent of pass reaches 100%, the service life reaches 15.2 months, the average temperature of the copper-aluminum conductive transition piece in the electrodeposition process is 51.3 ℃, the number of corrosion gaps appearing on a copper-aluminum composite interface is 2.7%, and the number of bending of the cross beam and breakage of a lifting lug is 1.8%.
Example 2
A company produces zinc industrially, the electrolysis period is 24 hours, and the current density is 500A/m2The negative plate is made of aluminum, and the size of the negative plate is 1.2m2The copper-aluminum beam is integrally die-cast and formed, the conductivity of the whole product is detected to be 29.18, the same batch of products are sampled and inspected, the product percent of pass is about 99.9 percent, the service life is 11.2 months, the average temperature of the contact position of the busbar and the copper in the electrodeposition process is 55.2 ℃, and the copper-aluminum beam is manufactured by copper-aluminum beamThe number of corrosion gaps on the composite interface is 8.9%, and the number of bent beams and broken lifting lugs is 2.4%.
Under the same electrolysis condition, the crossbeam and the explosive composite conductive head are manufactured by low-pressure casting, the overall conductivity of the detection result is 29.95, the product percent of pass reaches 100%, the service life reaches 14.5 months, the average temperature of the contact position of the busbar and the copper in the electrodeposition process is 52.2 ℃, the number of corrosion gaps appearing on the copper-aluminum composite interface is 2.4%, and the number of bending appearing on the crossbeam and breaking appearing on the lifting lug is 0.9%.
Example 3
The electrolytic period of zinc produced industrially by a certain company is 48 hours, and the current density is 420A/m2The negative plate is made of aluminum and has a size of 1.6m2The conductive head, the lifting lug and the cross beam are welded together by the copper-aluminum cross beam in a welding mode, the conductive head is prepared by a gravity casting process, the conductivity of the whole product is 23.2, the same batch of products are subjected to sampling inspection, the product percent of pass is about 98.5%, the service life is 11.5 months, the average temperature of the contact position of a busbar and copper in the electrodeposition process is 53.4 ℃, the number of corrosion gaps is 2.4% on a copper-aluminum composite interface, and the number of bending and lifting lug breakage is 10.9%.
Under the same electrolysis condition, the crossbeam and the explosive composite conductive head are manufactured by low-pressure casting, the overall conductivity of the detection result is 29.95, the product percent of pass reaches 100%, the service life reaches 14.5 months, the average temperature of the contact position of the busbar and the copper in the electrodeposition process is 53.2 ℃, the number of corrosion gaps appearing on the copper-aluminum composite interface is 2.4%, and the number of bending appearing on the crossbeam and the breaking appearing on the lifting lug is 3.9%.
Claims (9)
1. The zinc electrodeposition cathode plate aluminum integral beam is characterized by being formed by welding a low-pressure cast aluminum beam, a lifting lug and a copper-aluminum conductive piece through friction stir welding, the conductivity of the zinc electrodeposition cathode plate aluminum integral beam is over 29.90, the service life of the zinc electrodeposition cathode plate aluminum integral beam is over 14 months, and the average temperature of the contact position of a mesh row and copper in the electrodeposition process is lower than 53 ℃.
2. The zinc electrowinning cathode plate aluminum solid beam according to claim 1, characterized in that the friction welding is prepared separately by explosion cladding or flash welding.
3. The zinc electrowinning cathode plate aluminum monolith beam of claim 1, wherein the low pressure cast aluminum beam has a chemical composition of: si is more than or equal to 0.15 percent and less than or equal to 0.35 percent, Fe is more than or equal to 0.25 percent and less than or equal to 0.45 percent, Cu is more than or equal to 0.03 percent and less than or equal to 0.08 percent, Mn is more than or equal to 0.02 percent and less than or equal to 0.05 percent, Mg is more than or equal to 0.02 percent and less than or equal to 0.05 percent, and the balance is Al.
4. The integral aluminum beam for the zinc electrowinning cathode plate as claimed in claim 1, wherein the lifting lug comprises the following chemical components: si is more than or equal to 0.15 percent and less than or equal to 0.35 percent, Fe is more than or equal to 0.25 percent and less than or equal to 0.45 percent, Cu is more than or equal to 0.03 percent and less than or equal to 0.08 percent, Mn is more than or equal to 0.02 percent and less than or equal to 0.05 percent, Mg is more than or equal to 0.02 percent and less than or equal to 0.05 percent, and the balance is Al.
5. The integral aluminum beam for the zinc electrowinning cathode plate as recited in claim 1, wherein the copper chemical composition of the copper aluminum conductive member is: fe is less than or equal to 0.005 percent, Pb is less than or equal to 0.005 percent, S is less than or equal to 0.005 percent, the rest single term is less than or equal to 0.002 percent, and Cu is less than or equal to 99.9 percent.
6. The preparation method of the integral aluminum crossbeam of the zinc electrodeposition cathode plate as in any one of claims 1 to 5, which is characterized by comprising the steps of pretreatment, mold filling, pressure-maintaining solidification and post-treatment, and specifically comprises the following steps:
A. pretreatment: melting aluminum alloy to obtain aluminum liquid a;
B. filling a mold: the molten aluminum a enters the integral crossbeam cavity die at the flow speed of 5-15cm/s until the filling is finished;
C. pressure maintaining and solidifying: after the mold filling is finished, increasing the pressure in the mold cavity to 0.08-0.30MPa, maintaining the pressure, and performing reinforced solidification to obtain an integral beam b;
D. and (3) post-treatment: and cooling the integral beam b to remove burrs, and welding the integral beam b with the copper-aluminum conductive piece by friction stir welding to obtain the target zinc electrodeposition cathode plate aluminum integral beam.
7. The method according to claim 6, wherein the aluminum alloy in step A has the following chemical components: si is more than or equal to 0.15 percent and less than or equal to 0.35 percent, Fe is more than or equal to 0.25 percent and less than or equal to 0.45 percent, Cu is more than or equal to 0.03 percent and less than or equal to 0.08 percent, Mn is more than or equal to 0.02 percent and less than or equal to 0.05 percent, Mg is more than or equal to 0.02 percent and less than or equal to 0.05 percent, and the balance is Al.
8. The preparation method of claim 6, wherein the pre-treatment comprises placing the aluminum alloy into an aluminum melting furnace, charging compressed air into a low-pressure casting machine holding furnace to form pressure after the aluminum is melted, and pressing molten aluminum into a riser pipe under the drive of the pressure to complete the processes of filling, maintaining pressure and solidifying; wherein the liquid-raising time is 2-3S, the filling time is 12-20S, the pressure-increasing time is 0.5-1S, the pressure-maintaining time is 500-700S, and the pressure-releasing time is 1-3S.
9. The method of claim 6, wherein the monolithic beam casting is cast multiple products at a time in a vertical configuration.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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