Method for preparing copper-coated aluminium composite material
A composite material and copper-clad aluminum technology, which is applied in the direction of metal/alloy conductors, cable/conductor manufacturing, electrical components, etc., can solve the problems of difficulty in producing large-size copper-clad aluminum products, limited process conditions, and low utilization of equipment. Achieve the effects of improving equipment utilization, good bonding, and less annealing times
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[0020] Example 1
[0021] Preparation of 50x5mm copper-clad aluminum flat strip.
[0022] (1) Copper tubes and aluminum rods are used as raw materials, and the copper tubes are tube blanks with uniformly refined grains after being processed by methods such as extrusion and rolling. The aluminum rod is as-cast or forged pure aluminum with a purity of 98% or more. The head of the copper tube with an outer diameter of 89mm and an inner diameter of 86mm was conicaled with a taper of 115°. Then, it was softened and annealed at 400°C for 30 minutes, and acid washed with 15% dilute sulfuric acid for 5 minutes to remove oxide scale to ensure the inner hole was smooth and clean. According to the inner diameter and inner cone size of the copper tube, the aluminum rod is turned and the head of the aluminum rod is taper. After being cleaned by 15% sodium hydroxide alkaline water for 3-10 minutes, it is dried and matched with the copper tube to form an extrusion blank. (Copper tube) The exter...
Example Embodiment
[0026] Example 2
[0027] The size is φ1mm. Preparation of copper-clad aluminum flexible wire with a cross-section ratio of 15%.
[0028] (1) Copper tubes and aluminum rods are used as raw materials, and the copper tubes are tube blanks with uniformly refined grains after being processed by methods such as extrusion and rolling. The aluminum rod is as-cast or forged pure aluminum with a purity of 98% or more. The head of the copper tube with an outer diameter of 49mm and an inner diameter of 45mm is conical with a taper of 87°, followed by a softening annealing at 400°C for 30 minutes, using a 15% dilute sulfuric acid lotion, pickling for 5 minutes to remove oxide scale and ensuring a smooth inner hole. According to the inner diameter and inner cone size of the copper tube, the aluminum rod is turned and the head of the aluminum rod is taper. After being cleaned by 15% sodium hydroxide alkaline water for 3-10 minutes, it is dried and matched with the copper tube to form an extrus...
Example Embodiment
[0032] Example 3
[0033] Preparation of copper-clad aluminum bar with a size of φ20 and a cross-sectional ratio of 30%.
[0034] (1) Copper tubes and aluminum rods are used as raw materials, and the copper tubes are tube blanks with uniformly refined grains after being processed by methods such as extrusion and rolling. The aluminum rod is as-cast or forged pure aluminum with a purity of 98% or more. The head of the copper tube with an outer diameter of 49mm and an inner diameter of 40mm was taper with a taper of 57°, followed by a softening annealing at 400°C for 30 minutes, using a 15% dilute sulfuric acid lotion, and pickling for 5 minutes to remove the oxide scale to ensure a smooth inner hole. According to the inner diameter and inner cone size of the copper tube, the aluminum rod is turned and the head of the aluminum rod is taper. After being cleaned by 15% sodium hydroxide alkaline water for 3-10 minutes, it is dried and matched with the copper tube to form an extrusion b...
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