Method for manufacturing aluminum electrolytic anode conductive device with high connection strength

Abstract

The application discloses a manufacturing method of an aluminum electrolysis anode conducting device with high connection strength, which comprises an anode aluminum guide rod and an anode steel claw, and a boss is arranged on the anode steel claw. First, the middle part of the upper surface of the boss of the anode steel claw is polished and cleaned, then Al, Si and rare earth element powders are mixed in proportion to prepare AlSi+rare earth alloy powder. Then, the prepared AlSi+rare earth alloy powder is added to the middle part of the upper surface of the boss of the anode steel claw, laser irradiation cladding is carried out, an AlSi+rare earth intermediate layer is prepared, and a groove is processed on the AlSi+rare earth intermediate layer. Finally, the anode aluminum guide rod is welded with the AlSi+rare earth intermediate layer by means of rotary friction welding by using the braking mode of pre-upset and then braking. In the application, the welding interface of the anode steel claw and the anode aluminum guide rod is completely connected by the synergistic effect of mechanical occlusion and metallurgical combination, the connection strength of the anode steel claw and the anode aluminum guide rod is improved, and the service life of the anode conducting device is increased.

Description

Technical Field

[0001] This invention relates to the field of design and manufacturing technology of anode conductive devices in the aluminum electrolysis industry, specifically a method for manufacturing an aluminum electrolysis anode conductive device with high connection strength. Background Technology

[0002] In the aluminum electrolysis industry, the anode conductive device is an essential piece of equipment for daily production operations. For example... Figure 5 As shown, the anode conductive device typically consists of an aluminum anode rod 1 and a cast steel anode claw 2. The anode claw 2 includes a boss 201, a claw body, and claw heads. In the prior art, anode claws are often distinguished by the number of claw heads arranged on the claw body; commonly used anode claws 2 can be divided into four-claw and six-claw types. During daily production operations, the anode conductive device needs to be in contact with molten aluminum for extended periods, with the temperature of its contact surface ranging from approximately 350℃ to 900℃. Therefore, the connection between the aluminum anode rod 1 and the anode claw 2 in the anode conductive device is easily corroded and damaged under the harsh environment of high temperature and high current.

[0003] In the current aluminum electrolysis industry, an aluminum-steel explosive welded composite plate 9 is added as an intermediate layer at the connection between the anode aluminum guide rod 1 and the anode steel claw 2. Then, the anode aluminum guide rod 1 and the anode steel claw 2 are respectively connected to the aluminum-steel explosive welded composite plate 9 by beveling and circumferential welding to achieve homogeneous connection of the aluminum-aluminum welding interface 8 and the steel-steel welding interface 6. However, through practice, it has been found that the anode conductive device manufactured according to the above connection method has poor performance because aluminum-steel intermetallic compounds are generated at the aluminum-steel explosive weld interface 7, which has an adverse effect on the welding interface. In addition, due to the different coefficients of thermal expansion of aluminum and steel, the residual stress at the aluminum-steel explosive weld interface 7 is relatively large, causing crack generation and propagation. Moreover, the aluminum-steel explosive weld interface 7 is relatively straight and cannot inhibit or hinder the growth of intermetallic compounds and cracks at the interface. Furthermore, since the connection between the aluminum anode guide rod and the anode steel claw mainly relies on the edge bevel weld, the conductive area is small and the resistivity is extremely high, resulting in high power consumption. Moreover, the lack of an effective connection between the two leads to poor weld strength and a short service life. These problems of poor connection strength and high power consumption also increase the cost of producing aluminum electrolysis anode conductive devices.

[0004] Chinese patent CN112981462A discloses a high-strength quick-connect aluminum guide rod manufacturing and low-resistance connection technology. The aluminum guide rod is processed into a frustum shape through hot forging, and then connected to an anode steel claw-shaped hollow connector via static diffusion, increasing the welding surface and improving the connection strength. Furthermore, it increases the conductivity of the connection surface by adding a conductor to the welding contact surface, thereby reducing impedance. However, the welding interface remains a flat aluminum / steel interface, failing to address the issues of intermetallic compound growth and crack propagation. Summary of the Invention

[0005] The present invention aims to provide a manufacturing method that can increase the connection area between the anode steel claw and the anode aluminum guide rod, thereby improving the connection strength of the aluminum electrolysis anode conductive device, compared with the insufficient connection strength caused by the small connection area between the anode steel claw and the anode aluminum guide rod in the existing anode conductive device manufacturing.

[0006] To solve the above technical problems, the specific solution adopted by the present invention is a method for manufacturing an aluminum electrolysis anode conductive device with high connection strength. The aluminum electrolysis anode conductive device includes an aluminum anode guide rod and an anode steel claw, and the anode steel claw is provided with a boss. The method specifically includes the following steps:

[0007] S1: Grind and clean the middle part of the upper surface of the boss of the anode steel claw;

[0008] S2: Al, Si and rare earth element powders are mixed in a certain proportion to prepare AlSi+rare earth alloy powder.

[0009] S3: Using the AlSi+ rare earth alloy powder obtained in step S2 above, an AlSi+ rare earth intermediate layer is formed in the middle of the upper surface of the protrusion of the anode steel claw by laser irradiation cladding.

[0010] S4: Grooves are machined on the AlSi+ rare earth intermediate layer obtained in step S3 above.

[0011] S5: Using a braking method of upsetting followed by braking, the anode aluminum guide rod is welded to the AlSi+ rare earth intermediate layer prepared in S3 by rotary friction welding.

[0012] As an optimized solution for the above-mentioned method of manufacturing a conductive device for aluminum electrolysis anode with high connection strength: In step S2, the chemical composition mass fraction ratio of Al, Si and rare earth element powder materials is Al:Si:rare earth element = 84.27~87.5:12.0~15.0:0.5~0.73; the rare earth element is one or a mixture of two of La, Nd and Ce.

[0013] As another optimization of the above-mentioned method for manufacturing an aluminum electrolytic anode conductive device with high connection strength, in step S2, the prepared AlSi+ rare earth alloy powder is placed in a vacuum drying box at 80℃ for 2h.

[0014] As another optimization of the above-mentioned method for manufacturing an aluminum electrolytic anode conductive device with high connection strength, in step S3, the AlSi+ rare earth alloy powder is added to the middle part of the upper surface of the boss by a synchronous laser cladding process; wherein the laser power of the laser cladding process is 200-300W, the feeding rate of the AlSi+ rare earth alloy powder is 15-20g / min, the scanning rate is 40mm / s, the spot radius is 0.5mm, and the overlap rate is 40%.

[0015] As another optimization of the above-mentioned method for manufacturing an aluminum electrolytic anode conductive device with high connection strength, in step S3, when laser irradiation cladding, argon gas with a purity of 99.5% is used as the protective gas, and the argon gas flow rate is 25L / min.

[0016] As another optimization of the above-mentioned method for manufacturing an aluminum electrolytic anode conductive device with high connection strength, in step S3, the thickness of the AlSi+ rare earth intermediate layer is ≥15mm.

[0017] As another optimization of the above-mentioned method for manufacturing an aluminum electrolytic anode conductive device with high connection strength, in step S4, the plurality of strip-shaped grooves machined on the AlSi+ rare earth intermediate layer are distributed radially with the boss midpoint as the center, or the plurality of strip-shaped grooves are distributed in a parallel state, or the head and tail of each strip-shaped groove are connected and distributed in a concentric circle shape.

[0018] As another optimization of the above-mentioned method for manufacturing an aluminum electrolytic anode conductive device with high connection strength, in step S4, the width of the plurality of strip-shaped grooves is in the range of 2-5mm.

[0019] As another optimization of the above-mentioned method for manufacturing an aluminum electrolytic anode conductive device with high connection strength, in step S5, the anode steel claw and the anode aluminum lead are placed on a rotary friction welding machine for friction welding, wherein the friction time is 45-70s, the rotation speed is 60-80r / min; the top brake time difference is 0.1-1.2s, the upsetting pressure is 70-90MPa, and the maximum upsetting force is 1350kN.

[0020] As another optimization of the above-mentioned method for manufacturing an aluminum electrolytic anode conductive device with high connection strength, before step S5, at least one pair of clamping planes for holding the electrolytic conductive clamp are forged on the upper part of the anode aluminum lead, and the cross section of the clamping planes of the anode aluminum lead is square or elliptical.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] In the present application, the AlSi+ rare earth intermediate layer is directly prepared on the protrusion of the anode steel claw by laser cladding, and the AlSi+ rare earth intermediate layer replaces the composite welding sheet of the aluminum / steel explosive welding between the anode steel claw and the anode aluminum guide rod in the conventional anode conductive device. The Si element in the AlSi+ rare earth intermediate layer can regulate the Fe-Al intermetallic compound at the welding interface between the anode steel claw and the anode aluminum guide rod, the rare earth element in the AlSi+ rare earth intermediate layer can significantly improve the wetting property of the AlSi+ rare earth intermediate layer and the cladding substrate, promote the uniform diffusion of the elements in the intermediate layer and the cladding substrate, and enhance the connection strength between the anode steel claw and the anode aluminum guide rod. In addition, the grooves opened on the upper surface of the AlSi+ rare earth intermediate layer can promote the formation of the sawtooth mechanical engagement between the anode aluminum guide rod and the AlSi+ rare earth intermediate layer, and the AlSi+ rare earth intermediate layer and the anode aluminum guide rod are metallurgically combined by the rotary friction welding. Through the synergistic mode of mechanical engagement and metallurgical combination, not only the contact area between the anode aluminum guide rod and the AlSi+ rare earth intermediate layer in the welding section is increased, and the connection strength between the anode aluminum guide rod and the anode steel claw is improved, but also the sawtooth mechanical engagement changes the flat interface shape of the original conventional explosive welding interface, inhibits the expansion of the intermetallic compound and the crack in the direction parallel to the welding interface, and reduces the contact pressure drop and current loss between aluminum and steel. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Figure 1 is a schematic diagram of the connection structure of the anode aluminum guide rod and the anode steel claw in the present application;

[0024] Figure 2 Figure 2 is a schematic diagram of the structure of the strip-shaped grooves on the AlSi+ rare earth intermediate layer in Example 1, which are in a radial structure;

[0025] Figure 3 Figure 3 is a schematic diagram of the structure of the strip-shaped grooves on the AlSi+ rare earth intermediate layer in Example 2, which are parallel to each other;

[0026] Figure 4 Figure 4 is a schematic diagram of the structure of the strip-shaped grooves on the AlSi+ rare earth intermediate layer in Example 3, which are in a concentric circle type;

[0027] Figure 5 Figure 5 is a schematic diagram of the connection structure of the anode aluminum guide rod and the anode steel claw in the conventional anode conductive device;

[0028] Fig. 1: anode aluminum guide rod, 2: anode steel claw, 201: boss, 3: AlSi+ rare earth intermediate layer, 301: groove, 4: rotary friction welding, 5: clamping plane, 6: steel-steel welding interface, 7: aluminum-steel explosion welding interface, 8: aluminum-aluminum welding interface, 9: aluminum-steel explosion welding composite plate. DETAILED DESCRIPTION

[0029] The application discloses a manufacturing method of an aluminum electrolysis anode conducting device with high connection strength, and the aluminum electrolysis anode conducting device comprises an anode aluminum guide rod and an anode steel claw, and the anode steel claw is provided with a boss, and the method comprises the following steps.

[0030] S1: polishing and cleaning the middle part of the upper surface of the boss 201 of the anode steel claw 2.

[0031] S2: mixing Al, Si and rare earth element powders in proportion to prepare AlSi+ rare earth alloy powder.

[0032] In the step S2, the mass fraction ratio of the chemical components of the Al, Si and rare earth element powders is Al:Si: rare earth element = 84.27-87.5: 12.0-15.0: 0.5-0.73; the rare earth element is one of La, Nd and Ce or a mixture of two of them, and the addition of the rare earth element can obviously improve the wetting performance of the AlSi+ rare earth intermediate layer 3 and the cladding base, promote the uniform diffusion of the elements in the intermediate layer and the cladding base, and enhance the connection strength between the welding interface of the anode steel claw 2 and the anode aluminum guide rod 1.

[0033] In the step S2, the AlSi+ rare earth alloy powder needs to be dried in a vacuum drying box at 80 DEG C for 2 hours after preparation.

[0034] S3: using the AlSi+ rare earth alloy powder prepared in the step S2 to prepare and form an AlSi+ rare earth intermediate layer on the middle part of the upper surface of the boss of the anode steel claw through laser irradiation cladding.

[0035] In the step S3, the upper surface of the boss 201 of the anode steel claw 2 is used as a base area, and the AlSi+ rare earth intermediate layer is formed through laser radiation scanning and melting while feeding the powder.

[0036] In the laser cladding process parameters, the laser power is 200-300 W, the feeding rate of the AlSi+ rare earth alloy powder is 15-20 g / min, the scanning rate is 40 mm / s, the spot radius is 0.5 mm, and the lap rate is 40%.

[0037] In step S3, the laser cladding process is performed with argon gas with a purity of 99.5% as a shielding gas directly against the surface of the substrate area, and the argon gas flow is 25 L / min. After the laser cladding process is completed, the shielding gas is turned off to prevent the molten pool from being oxidized during the laser cladding process.

[0038] In step S3, the thickness of the prepared AlSi+ rare earth intermediate layer 3 is ≥15 mm.

[0039] S4: grooves 301 are processed on the AlSi+ rare earth intermediate layer 3 prepared in step S3.

[0040] In step S4, the plurality of strip-shaped grooves 301 processed on the AlSi+ rare earth intermediate layer 3 by a machine are distributed radially with the midpoint of the boss 201 as the center, or the plurality of strip-shaped grooves 301 are distributed in a mutually parallel state, or the head and tail of each strip-shaped groove 301 are connected and distributed in a concentric circle shape.

[0041] In step S4, the width of the plurality of strip-shaped grooves 301 is in the range of 2-5 mm, and the spacing between the grooves 301 is determined according to the working condition.

[0042] After the grooves 301 are processed in step S4, the position where the electrolytic current-carrying clamp is to be clamped is selected on the anode aluminum guide rod 1 rotating body with a circular cross section, and then at least one pair of parallel clamping planes 5 are forged on the anode aluminum guide rod 1 rotating body at the selected position. The cross section of the anode aluminum guide rod 1 clamping plane 5 can be square or elliptical.

[0043] S5: the anode aluminum guide rod 1 is welded to the AlSi+ rare earth intermediate layer 3 prepared in step S3 by rotary friction welding 4 using the brake mode of first upsetting and then braking.

[0044] In step S5, the anode steel claw 2 and the anode aluminum guide rod 1 are placed on the rotary friction welding 4 welding machine for friction welding, wherein the friction time of the rotary friction welding 4 is 45-70 s, and the rotation speed is 60-80 r / min. In the first upsetting and then braking mode of step S5, the time difference between the upsetting and braking is 0.1-1.2 s, the upsetting pressure is 70-90 MPa, and the maximum upsetting force is 1350 kN.

[0045] Example 1

[0046] S1: Pretreatment of the base area on the upper surface of the convex platform 201 of the anode steel claw 2: first, select the central square area on the upper surface of the convex platform 201 of the anode steel claw 2 as the base area for laser cladding of the AlSi+Re intermediate layer. Then, use 300# sandpaper to polish the surface of the square base area to remove burrs and oxide layers on the surface of the base area until the metal luster of the base area is exposed. Then, clean the base area with acetone and alcohol to remove oil stains and debris on the surface of the base area.

[0047] S2: Preparation of AlSi+Re alloy powder: select Al, Si and Re powder materials with a purity of not less than 99.95%, wherein the mass fraction ratio of the alloy powder components Al, Si and Re is 84.27-87.5: 12.0-15.0: 0.5-0.73, mix the alloy powder to obtain the AlSi+Re alloy powder.

[0048] S3: Preparation of AlSi+Re intermediate layer: the AlSi+Re alloy powder prepared in the above step S2 is sent to the surface of the base area by laser, and the AlSi+Re intermediate layer is prepared by laser irradiation cladding. In the laser cladding process, the laser power is 200W, the powder feeding rate is 16g / min, the scanning rate is 40mm / s, the spot radius is 0.5mm, the overlap rate is 40%, and the argon gas flow is 25L / min.

[0049] S4: Processing of strip-shaped grooves 301: use mechanical equipment to process strip-shaped grooves 301 with a width of 2mm radially distributed on the AlSi+Re intermediate layer prepared in the above step S3.

[0050] S5: Forging of clamping planes 5: first, select the position clamped by the electrolytic conductive clamp on the anode aluminum guide rod 1 with a circular cross section, then forge two parallel clamping planes 5 at the selected position on the anode aluminum guide rod 1, and the cross section of the clamping plane 5 of the anode aluminum guide rod 1 is elliptical.

[0051] S6: Welding of the anode aluminum guide rod 1 and the anode steel claw 2: use the brake mode of top forging first and then braking to place the anode steel claw 2 with the AlSi+Re intermediate layer and the anode aluminum guide rod 1 on the rotary friction welding 4 machine for friction welding. The specific process parameters of the rotary friction welding 4 machine are: friction time is 70s, rotation speed is 150r / min. The time difference between top forging and braking in the brake mode of top forging first and then braking is 1.2s, the top forging pressure is 90MPa, and the maximum top forging force is 1350kN.

[0052] The anode conductive device manufactured by the above manufacturing method is tested for electrical and mechanical properties by a testing device. The test data is compared with the test data of the anode conductive device manufactured by the conventional method. It is found that the contact voltage of the anode steel claw 2 in the anode conductive device is reduced by 4.5% compared with the contact voltage of the anode steel claw 2 in the conventional anode conductive device. The service life of the connection between the anode steel claw 2 and the anode aluminum guide rod 1 in the anode conductive device manufactured by the manufacturing method is increased by 30.8% compared with the service life of the connection between the anode steel claw 2 and the anode aluminum guide rod 1 in the anode conductive device manufactured by the conventional manufacturing method.

[0053] Example 2

[0054] S1: Pretreatment of the upper surface base area of the boss 201 of the anode steel claw 2: First, select the central square area on the upper surface of the boss 201 of the anode steel claw 2 as the base area for laser cladding AlSi+Re intermediate layer. Then, use 300# sandpaper to polish the surface of the square base area to remove burrs and oxide layers on the surface of the base area until the metal luster of the base area is exposed. Then, clean the base with acetone and alcohol to remove oil stains and debris on the surface of the base.

[0055] S2: Preparation of AlSi+Re alloy powder: Select Al, Si, and Re powder materials with a purity of not less than 99.95%, wherein the mass fraction ratio of the alloy powder components Al, Si, and Re is 84.27-87.5:12.0-15.0:0.5-0.73. Mix the alloy powder to obtain AlSi+Re alloy powder.

[0056] S3: Preparation of AlSi+Re intermediate layer: The AlSi+Re alloy powder prepared in the above step S2 is sprayed onto the surface of the base area by laser, and then an AlSi+Re intermediate layer is prepared by laser irradiation and cladding. In the laser cladding process, the laser power is 200W, the powder feeding rate is 18g / min, the scanning rate is 40mm / s, the spot radius is 0.5mm, the overlap rate is 40%, and the argon gas flow rate is 25L / min.

[0057] S4: Processing of strip-shaped grooves 301: Use mechanical equipment to process strip-shaped grooves 301 with a width of 2mm on the AlSi+Re intermediate layer prepared in the above step S3, which are distributed in parallel.

[0058] S5: Forging of clamping planes 5: First, select the position of the electrolytic conductive clamp on the anode aluminum guide rod 1 with a circular cross-section, and then forge two parallel clamping planes 5 on the selected position of the anode aluminum guide rod 1.

[0059] S6: Welding the anode aluminum guide rod 1 and the anode steel claw 2: The anode steel claw 2 and the anode aluminum guide rod 1 with the AlSi+Re intermediate layer are placed on the rotary friction welding 4 machine for friction welding by using the brake mode of top forging first and then braking. The specific process parameters of the rotary friction welding 4 machine are: the friction time is 45 s, and the rotating speed is 150 r / min. The time difference between the top forging and the braking in the brake mode of top forging first and then braking is 1.2 s, the top forging pressure is 90 MPa, and the maximum top forging force is 1350 kN.

[0060] By testing the electrical and mechanical properties of the anode conductive device manufactured by the above manufacturing method by the test equipment, and comparing the test data with the test data of the anode conductive device manufactured by the existing traditional method, it is found that the contact voltage of the anode steel claw 2 in the anode conductive device is reduced by 6.7% compared with the contact voltage of the anode steel claw 2 in the traditional anode conductive device, and the service life of the connection between the anode steel claw 2 and the anode aluminum guide rod 1 in the anode conductive device manufactured by the manufacturing method is increased by 35.2% compared with the anode conductive device manufactured by the traditional manufacturing method.

[0061] Example 3

[0062] S1: Pretreatment of the upper surface base area of the anode steel claw 2 boss 201: First, select the central square area on the upper surface of the boss 201 of the anode steel claw 2 as the base area for laser cladding the AlSi+Re intermediate layer. Then, use 300# sandpaper to polish the surface of the square base area to remove burrs and oxide layers on the surface of the base area until the metal luster of the base area is exposed. Then, clean the base with acetone and alcohol to remove oil stains and debris on the surface of the base.

[0063] S2: Preparation of AlSi+Re alloy powder: Select Al, Si, and Re powder materials with a purity not less than 99.95%, wherein the mass fraction ratio of the alloy powder components Al, Si, and Re is 84.27-87.5: 12.0-15.0: 0.5-0.73, mix the alloy powder to obtain the AlSi+Re alloy powder.

[0064] S3: Preparation of AlSi+Re intermediate layer: The AlSi+Re alloy powder prepared in the above step S2 is sprayed onto the surface of the base area by laser, and then an AlSi+Re intermediate layer is prepared by laser irradiation. In the laser cladding process, the laser power is 250 W, the powder feeding rate is 18 g / min, the scanning rate is 40 mm / s, the spot radius is 0.5 mm, and the overlap rate is 40%; the argon gas flow is 25 L / min.

[0065] S4: Processing of strip-shaped grooves 301: Use mechanical equipment to process strip-shaped grooves 301 with a diameter of 2 mm on the AlSi+Re intermediate layer prepared in the above step S3, which are distributed in a concentric circle shape with the first end connected to the second end.

[0066] S5: forging clamping plane 5: first select the position of the electrolytic conductive clamp on the cross-section of the round anode aluminum guide rod 1, then forge two parallel clamping planes 5 on the selected position of the anode aluminum guide rod 1.

[0067] S6: welding anode aluminum guide rod 1 and anode steel claw 2: using the brake mode of top forging first and then braking to place the anode steel claw 2 and the anode aluminum guide rod 1 with AlSi+Re intermediate layer on the rotary friction welding 4 welding machine for friction welding. The specific process parameters of the rotary friction welding 4 welding machine are: friction time is 70s, rotation speed is 70r / min. The time difference between top forging and braking in the brake mode of top forging first and then braking is 1.2s, the top forging pressure is 90MPa, and the maximum top forging force is 1350kN.

[0068] By testing the electrical and mechanical properties of the anode conductive device manufactured by the above manufacturing method through the test equipment, and comparing the test data with the test data of the anode conductive device manufactured by the existing traditional method, it is found that the contact voltage of the anode steel claw 2 in the anode conductive device is reduced by 6.9% compared with the contact voltage of the anode steel claw 2 in the traditional anode conductive device, and the service life of the connection between the anode steel claw 2 and the anode aluminum guide rod 1 in the anode conductive device manufactured by the manufacturing method is increased by 41.5% compared with the anode conductive device manufactured by the traditional manufacturing method.

[0069] As can be seen from the above embodiments 1-3, the AlSi+Re intermediate layer is prepared by laser cladding directly on the boss 201 of the anode steel claw 2, the mechanical interlocking is formed between the groove 301 on the AlSi+Re intermediate layer and the welding interface between the anode aluminum guide rod 1, the AlSi+Re intermediate layer and the anode aluminum guide rod 1 are metallurgically combined in the rotary friction welding 4 mode, and the complete connection of the welding interface between the anode steel claw 2 and the anode aluminum guide rod 1 is realized through the synergistic effect of mechanical interlocking and metallurgical combination, which improves the connection strength of the anode steel claw 2 and the anode aluminum guide rod 1 and increases the service life of the anode conductive device.

Claims

1. A method for manufacturing a high-strength aluminum electrolysis anode conductive device, the aluminum electrolysis anode conductive device comprising an aluminum anode guide rod (1) and an anode steel claw (2), wherein a boss (201) is provided on the anode steel claw (2), characterized in that: Specifically, the steps include the following: S1: Grind and clean the middle part of the upper surface of the boss (201) of the anode steel claw (2); S2: Al, Si and rare earth element powders are mixed in a certain proportion to prepare AlSi+rare earth alloy powder. The chemical composition mass fraction ratio of Al, Si, and rare earth element powder materials is Al:Si:rare earth element = 84.27~87.5:12.0~15.0:0.5~0.73; the rare earth element is one or a mixture of two of La, Nd, and Ce. S3: Using the AlSi+ rare earth alloy powder obtained in step S2 above, an AlSi+ rare earth intermediate layer (3) is formed in the middle of the upper surface of the boss (201) of the anode steel claw (2) by laser irradiation cladding. S4: Grooves (301) are machined on the AlSi+ rare earth intermediate layer (3) obtained in step S3 above. Specifically, multiple strip-shaped grooves (301) machined on the AlSi+ rare earth intermediate layer (3) are radially distributed with the center of the boss (201) as the center, or multiple strip-shaped grooves (301) are distributed in a parallel state, or the beginning and end of each strip-shaped groove (301) are connected and distributed in a concentric circle. S5: The anode aluminum guide rod (1) is welded to the AlSi+ rare earth intermediate layer (3) prepared in S3 by means of rotary friction welding (4) using the braking method of first upsetting and then braking.

2. The method for manufacturing a high-strength aluminum electrolytic anode conductive device according to claim 1, characterized in that: In step S2, the prepared AlSi+ rare earth alloy powder is dried in a vacuum drying oven at 80°C for 2 hours.

3. The method for manufacturing a high-strength aluminum electrolytic anode conductive device according to claim 1, characterized in that: In step S3, AlSi+ rare earth alloy powder is added to the middle of the upper surface of the boss (201) by a synchronous laser cladding process; wherein, the laser power of the laser cladding process is 200~300W, the AlSi+ rare earth alloy powder delivery rate is 15~20 g / min, the scanning rate is 40 mm / s, the spot radius is 0.5 mm, and the overlap rate is 40%.

4. The method for manufacturing a high-strength aluminum electrolytic anode conductive device according to claim 1, characterized in that: In step S3, during laser irradiation cladding, argon gas with a purity of 99.5% is used as the protective gas, and the argon gas flow rate is 25 L / min.

5. The method for manufacturing a high-strength aluminum electrolytic anode conductive device according to claim 1, characterized in that: In step S3, the thickness of the AlSi+ rare earth intermediate layer (3) is ≥15mm.

6. The method for manufacturing a high-strength aluminum electrolytic anode conductive device according to claim 1, characterized in that: In step S4, the width of the multiple strip grooves (301) ranges from 2 to 5 mm.

7. The method for manufacturing a high-strength aluminum electrolytic anode conductive device according to claim 1, characterized in that: In step S5, the anode steel claw (2) and the anode aluminum guide rod (1) are placed on a rotary friction welding machine for friction welding. The friction time is 45~70s, the rotation speed is 60~80 r / min, the top braking time difference is 0.1~1.2s, the upsetting pressure is 70~90 MPa, and the maximum upsetting force is 1350 kN.

8. The method for manufacturing a high-strength aluminum electrolytic anode conductive device according to claim 1, characterized in that: Before step S5, at least one pair of parallel clamping planes (5) for holding the electrolytic conductive clamps are forged on the upper part of the anode aluminum guide rod (1). The cross-section of the clamping plane (5) of the anode aluminum guide rod (1) is square or elliptical.

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