Preparation method of oxygen-free copper rod
An oxygen-free copper rod and rod blank technology, which is applied in conductive materials, metal/alloy conductors, conductive materials, etc., can solve the problem that the performance indicators of copper rods cannot meet international and domestic requirements, and the mechanical properties and electrical conductivity of copper rods are reduced. , reduce the high pressure resistance and other problems, and achieve the effects of good electrical conductivity and mechanical properties, simple preparation method and low oxygen content
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Embodiment 1
[0018] The present invention proposes a kind of preparation method of oxygen-free copper rod, comprises the following steps:
[0019] S1. After mixing Mn 0.5wt%, Pr 0.05wt%, Sr 0.06wt%, Sn 0.006wt%, and the balance is Cu, add it to a smelting furnace with a temperature of 1270° C. to melt to obtain a molten solution. The surface of the molten liquid is covered with a layer of graphite flakes with a thickness of 120 mm;
[0020] S2. Stretch the hollow crystallizer directly into the molten liquid. The hollow crystallizer is cooled by a water spacer. The molten liquid condenses into a solid in the hollow crystallizer. Oxygen-free billets with a diameter of 18mm;
[0021] S3, cooling the S2 anaerobic billet at minus 50°C for 5 hours;
[0022] S4. The oxygen-free rod billet cooled in S3 was drawn 4 times under the protection of nitrogen, and after each drawing, annealed at an annealing temperature of 520° C. for 2.5 hours to obtain an oxygen-free copper rod with a diameter of 8 m...
Embodiment 2
[0024] The present invention proposes a kind of preparation method of oxygen-free copper rod, comprises the following steps:
[0025] S1. After mixing Mn 0.2wt%, Pr 0.01wt%, Sr 0.02wt%, Sn 0.002wt%, and the balance is Cu, add it to a melting furnace with a temperature of 1255° C. to melt to obtain a molten solution. The molten surface is covered with a layer of graphite flakes with a thickness of 100mm;
[0026] S2. Stretch the hollow crystallizer directly into the molten liquid. The hollow crystallizer is cooled by a water spacer. The molten liquid condenses into a solid in the hollow crystallizer. 20mm anaerobic billet;
[0027] S3, cooling the S2 anaerobic billet at minus 25°C for 10 hours;
[0028] S4. The oxygen-free rod billet cooled in S3 was drawn 7 times under nitrogen protection, and after each drawing, annealing treatment was performed at an annealing temperature of 540° C. for 2.0 hours to obtain an oxygen-free copper rod with a diameter of 5 mm.
Embodiment 3
[0030] The present invention proposes a kind of preparation method of oxygen-free copper rod, comprises the following steps:
[0031] S1. After mixing Mn 0.3wt%, Pr 0.03wt%, Sr 0.05wt%, Sn 0.004wt%, and the balance is Cu, add it to a melting furnace with a temperature of 1275° C. to melt to obtain a molten liquid. The surface of the molten liquid is covered with a layer of graphite flakes with a thickness of 115mm;
[0032] S2. Stretch the hollow crystallizer directly into the molten liquid. The hollow crystallizer is cooled by a water spacer. The molten liquid condenses into a solid in the hollow crystallizer. 15mm anaerobic billet;
[0033] S3, cooling the S2 anaerobic billet at minus 35°C for 8 hours;
[0034] S4. The oxygen-free rod billet cooled in S3 was drawn 5 times under nitrogen protection, and after each drawing, annealing treatment was performed at an annealing temperature of 550° C. for 1.6 hours to obtain an oxygen-free copper rod with a diameter of 6 mm.
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Abstract
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