Production process of low-resistance high-performance anode steel claw

Abstract

The application discloses a production process of low-resistance high-performance anode steel claw, which comprises the following steps: 1) material selection, hot-rolled round steel and hot-rolled square steel are adopted, and the material is BTCY-1 steel; 2) material blanking, in order to guarantee the requirement of friction welding process, the square steel with the size of 165 (high) * 180 (wide) mm is planed and milled, the length of the flat steel is cut to 1230±2 mm, the section of the flat steel with the size of 165 mm is planed and milled to 0.5-1.5 mm, and the square steel is increased by 3-5 mm according to the standard height deviation of the friction welding welding amount and the height deviation of the anode steel claw, so that the total height after the friction welding is guaranteed; and 3) processing technology, the friction seamless welding is adopted, the fusion rate of the friction welding is greater than or equal to 99%, and the reasonable process parameters are adopted, so that the friction welding process can meet the welding requirement of the anode steel claw. The resistivity of the low-resistance high-performance anode steel claw produced by the production process is less than 11 mu omega*mm at 20 DEG C.

Description

Technical Field

[0001] This invention relates to the field of machining, and in particular to a manufacturing process for a low-resistance, high-performance anode steel claw. Background Technology

[0002] The anode steel claws in electrolytic aluminum production are the connecting components between the anode carbon blocks and the busbars on the electrolytic cell. They carry a large current during the aluminum electrolysis process and are one of the most important consumable parts for electrolytic aluminum production enterprises. In the cost structure of electrolytic aluminum, electricity consumption accounts for about 45% of the total cost. The average AC power consumption of the existing domestic electrolytic aluminum production capacity (molten aluminum) is about 13,500 kWh / ton.

[0003] The main factors affecting the conductivity of electrolytic aluminum anode steel claws are material and structure. Given a fixed structure, reducing the resistance of electrolytic aluminum anode steel claws can only be achieved by improving the material. Currently, most anode steel claws are made of cast steel, while emerging structural steel claws are primarily made of Q195 and Q235. The resistivity of these materials is significantly higher than that of industrial pure iron. Steel claws manufactured using friction welding with industrial pure iron can reduce the cell voltage by 8-15V, saving 30-50 kWh per ton of steel and 12-20 yuan per ton of aluminum, thus achieving cost reduction and efficiency improvement. Summary of the Invention

[0004] To address the aforementioned technical problems, the purpose of this invention is to provide a manufacturing process for low-resistance, high-performance anode steel claws.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This invention discloses a manufacturing process for low-resistance, high-performance anode steel claws, comprising:

[0007] 1) Material selection and testing

[0008] Hot-rolled round steel and hot-rolled square steel are used. The material is BTCY-1 steel. The product specifications are 165 (height) × 180 (width) mm ± 2mm square steel and Φ180 mm ± 2mm round steel.

[0009] 2) Material cutting

[0010] To ensure the requirements of the friction welding process, the 165 (height) × 180 (width) mm square steel is milled, the flat steel is cut to a length of 1230 ± 2 mm, and the 165 mm cross-section is milled by 0.5-1.5 mm; according to the requirements of the friction welding amount and the height deviation of the anode steel claw, the round steel is increased by 3-5 mm according to the standard height deviation to ensure the total height after friction welding.

[0011] 3) Processing technology

[0012] Friction seamless welding is adopted, with a welding fusion rate of greater than or equal to 99%. Under reasonable process parameters, the friction welding process is guaranteed to meet the welding requirements of anode steel claws.

[0013] Furthermore, the resistivity of the low-resistance high-performance anode steel claw is <11μΩ·mm at 20℃.

[0014] Furthermore, the resistivity of the low-resistance high-performance anode steel claw is between 10.2 and 10.7 μΩ·mm.

[0015] Furthermore, using a 400-ton class inertial friction welding machine, the test welding machine can provide a maximum axial pressure of 400 tons when welding large-sized materials. The rotational speed is adjustable within the range of 0-1000 r / min, and the moment of inertia is between 350-12000 kg·m. 2 Adjustable within the range; the moment of inertia was set to 500 kg·m during the test. 2 The rotation speed is 480 r / min; the pressure is applied in two stages during the welding process: a low axial pressure of 50 MPa is applied in the initial friction stage, and a high axial pressure of 80 MPa is applied in the stable friction stage.

[0016] Furthermore, the chemical composition of the BTCY-1 steel by mass percentage is as follows: C≤0.0020%, Si≤0.010%, Mn≤0.020%, P≤0.012%, S≤0.008%, Alt≤0.020%, Cr≤0.020%, Cu≤0.020%, Ni≤0.020%, Ti≤0.0050%, [O]≤0.0050%, and the remainder is Fe.

[0017] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0018] The resistivity of the low-resistance, high-performance anode steel claw produced using the manufacturing process of this invention is <11 μΩ·mm at 20°C. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This refers to the cross-sectional dimensions of the beam. Detailed Implementation

[0021] A production process for a low-resistance, high-performance anode steel claw, comprising: cutting hot-rolled square steel and hot-rolled round steel into dimensional requirements—high-power friction welding—surface treatment and quality inspection—flaw detection—delivery;

[0022] The specific solution is as follows:

[0023] 1. Material selection and testing

[0024] Hot-rolled round steel and hot-rolled square steel are used. The material is BTCY-1 steel (its chemical composition by mass percentage is: C≤0.0020%, Si≤0.010%, Mn≤0.020%, P≤0.012%, S≤0.008%, Alt≤0.020%, Cr≤0.020%, Cu≤0.020%, Ni≤0.020%, Ti≤0.0050%, [O]≤0.0050%, and the rest is Fe, i.e., impurities). The product specifications are 165 (height) × 180 (width) mm ± 2 mm square steel and Φ180 mm ± 2 mm round steel.

[0025] 2. Material cutting

[0026] To ensure the requirements of the friction welding process, the 165 (height) × 180 (width) mm square steel is milled, and the flat steel is cut to a length of 1230 ± 2 mm. The 165 mm cross-section is milled by 0.5-1.5 mm. Based on the required amount of friction welding and the height deviation of the anode claws, the round steel is increased by 3-5 mm according to the standard height deviation to ensure the total height after friction welding.

[0027] 3. Processing technology

[0028] Friction seamless welding is adopted, with a welding fusion rate of greater than or equal to 99%. Under reasonable process parameters, the friction welding process is guaranteed to meet the welding requirements of anode steel claws.

[0029] Employing 400-ton class inertia friction welding, this welding machine can weld large-sized materials, providing a maximum axial pressure of 400 tons. The rotational speed is adjustable from 0-1000 r / min, and the moment of inertia ranges from 350-12000 kg·m. 2 Adjustable within the range. During the experiment, the moment of inertia was set to 500 kg·m. 2 The rotation speed is 480 r / min; the pressure is applied in two stages during the welding process: a low axial pressure of 50 MPa is applied in the initial friction stage, and a high axial pressure of 80 MPa is applied in the stable friction stage.

[0030] Table 1 Main Parameters and Requirements

[0031] Number of anode claws per group 4 Beam cross-section dimensions 165 (height) ±2mm × 180 (width) mm ±2mm Steel claw head diameter Φ180mm±1mm Steel claw center distance 350±1mm Anode steel claw material BTCY-1

[0032] 4. Flaw detection inspection

[0033] The flaw detection meets the Class B requirements in GB / T11345-2013, and the relevant performance is recorded in the quality assurance certificate according to the inspection results.

[0034] Specific effects

[0035] 1. Specifications and Effects

[0036] Length (mm) Height (mm) center distance mm 1 1230 512 350 2 1232 513 351 3 1231 512 350 4 1230 514 351 5 1231 513 350

[0037] 2. Flaw detection results

[0038] Non-destructive testing was conducted according to Class B in GB / T11345-2013, and the test results were 100% qualified.

[0039] Detection level Acceptance level in conclusion 1 B Ⅰ qualified 2 B Ⅰ qualified 3 B Ⅰ qualified 4 B Ⅰ qualified 5 B Ⅰ qualified

[0040] 3. Resistivity of anode steel claws

[0041] Resistivity was measured in accordance with the requirements of GB / T 3048.2-2007 standard.

[0042]

[0043] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A manufacturing process for a low-resistance, high-performance anode steel claw, characterized in that: include: 1) Material selection and testing Hot-rolled round steel and hot-rolled square steel are used, with BTCY-1 steel as the material and a product specification of 165mm high × 180mm wide ±2mm square steel, Φ180mm ±2mm round steel; 2) Material cutting To ensure the requirements of the friction welding process, the 165mm high × 180mm wide square steel is milled, the flat steel is cut to a length of 1230±2mm, and the 165mm cross-section is milled by 0.5-1.5mm; according to the requirements of the friction welding amount and the height deviation of the anode steel claw, the round steel is increased by 3-5mm according to the standard height deviation to ensure the total height after friction welding. 3) Processing technology Friction seamless welding is adopted, with a welding fusion rate of greater than or equal to 99%. Under reasonable process parameters, the friction welding process is guaranteed to meet the welding requirements of anode steel claws. The resistivity of the low-resistance, high-performance anode steel claw is <11 μΩ·mm at 20℃; The resistivity of the low-resistance, high-performance anode steel claw is 10.2-10.7 μΩ·mm; Employing a 400-ton class inertial friction welding machine, this welding machine can provide a maximum axial pressure of 400 tons when welding large-sized materials. The rotational speed is adjustable within the range of 0-1000 r / min, and the moment of inertia ranges from 350-12000 kg. m 2 Adjustable within the range; the moment of inertia was set to 500 kg during the test. m 2 The rotation speed is 480 r / min; the pressure is applied in two stages during the welding process: a low axial pressure of 50 MPa is applied in the initial friction stage, and a high axial pressure of 80 MPa is applied in the stable friction stage. The chemical composition of the BTCY-1 steel by mass percentage is as follows: C≤0.0020%, Si≤0.010%, Mn≤0.020%, P≤0.012%, S≤0.008%, Alt≤0.020%, Cr≤0.020%, Cu≤0.020%, Ni≤0.020%, Ti≤0.0050%, [O]≤0.0050%, and the remainder is Fe.

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