Manufacturing process of conductive copper-clad aluminum busbar with large cross section

Abstract

The invention relates to a manufacturing process of a conductive copper-clad aluminum busbar with a large cross section, which comprises the following steps that: the aluminum busbar with the large cross section which is polished is continuously coated by a polished copper strip, a joint which is formed when in coating is welded, then a copper-clad aluminum ingot is stretched, the stretched copper-clad aluminum ingot is arranged in a bright annealing furnace to be spread and annealed at low temperature, the annealing temperature is controlled to be 300DEG C to 350DEG C, the annealing time is controlled to be 30min to 60min, small-deformation controlled stretching is carried out to the copper-clad aluminum ingot which is spread and annealed at low temperature with the surface reduction rate being 5 percent to 10 percent, and a finished conductive copper-clad aluminum busbar product with the large cross section is obtained. According to the manufacturing process of the conductive copper-clad aluminum busbar with the large cross section, a process is simpler, corresponding equipment investment is low, and the manufacturing process has good development prospect.

Description

technical field

[0001] The invention relates to a manufacturing process of a copper-clad aluminum bar, in particular to a manufacturing process of a large-section conductive copper-clad aluminum bar. Background technique

[0002] Large cross-section copper-clad aluminum row usually refers to the cross-section of 300 ~ 1000mm 2 The copper-clad aluminum row, of which the aluminum core accounts for 75-85%, and the copper layer accounts for 15-25%.

[0003] At present, some domestic enterprises use production techniques such as "electroplating method" or "casing method" to produce large-section copper-clad aluminum bars. However, because the copper coating is too thin, rolling and stretching are difficult, and the interface between copper and aluminum is not well bonded, it cannot meet the requirements for use.

[0004] Foreign countries use large-tonnage extrusion machines to produce large-section copper-clad aluminum bars through the process of "hydrostatic extrusion" and "c...

Examples

Embodiment 1

[0012] The manufacturing process of the large-section conductive copper-clad aluminum bar includes the following steps: Continuously cover the brushed large-section aluminum bar with the brushed copper strip, and use high-frequency argon arc to seal the seam formed by the coating. Welding, the seam formed by the cladding is located on one side of the short rectangular side of the aluminum row. Then the copper-clad aluminum billet is stretched, and the stretched copper-clad aluminum billet is placed in a bright annealing furnace for low-temperature diffusion annealing, so that a 2-3um copper-aluminum interface bonding layer is formed between the copper strip and the aluminum row. It can meet the requirements of interfacial metallurgical bonding without affecting the reprocessing performance of the composite material. The annealing temperature is controlled at 300°C and the annealing time is controlled at 60 minutes. The copper-clad aluminum billet after low-temperature diffusion...

Embodiment 2

[0014] The manufacturing process of the large-section conductive copper-clad aluminum bar includes the following steps: Continuously cover the brushed large-section aluminum bar with the brushed copper strip, and use high-frequency argon arc to seal the seam formed by the coating. Welding, the seam formed by the cladding is located on one side of the short rectangular side of the aluminum row. Then the copper-clad aluminum billet is stretched, and the stretched copper-clad aluminum billet is placed in a bright annealing furnace for low-temperature diffusion annealing, so that a 2-3um copper-aluminum interface bonding layer is formed between the copper strip and the aluminum row. It can meet the requirements of interfacial metallurgical bonding without affecting the reprocessing performance of the composite material. The annealing temperature is controlled at 350°C and the annealing time is controlled at 30 minutes. The stretching is controlled with a small amount of deformatio...

Embodiment 3

[0016] The manufacturing process of the large-section conductive copper-clad aluminum bar includes the following steps: Continuously cover the brushed large-section aluminum bar with the brushed copper strip, and use high-frequency argon arc to seal the seam formed by the coating. Welding, the seam formed by the cladding is located on one side of the short rectangular side of the aluminum row. Then the copper-clad aluminum billet is stretched, and the stretched copper-clad aluminum billet is placed in a bright annealing furnace for low-temperature diffusion annealing, so that a 2-3um copper-aluminum interface bonding layer is formed between the copper strip and the aluminum row. It can meet the requirements of interfacial metallurgical bonding without affecting the reprocessing performance of the composite material. The annealing temperature is controlled at 325°C and the annealing time is controlled at 45 minutes. The stretching is controlled with a small amount of deformatio...

technical field

[0001] The invention relates to a manufacturing process of a copper-clad aluminum bar, in particular to a manufacturing process of a large-section conductive copper-clad aluminum bar. Background technique

[0002] Large cross-section copper-clad aluminum row usually refers to the cross-section of 300 ~ 1000mm 2 The copper-clad aluminum row, of which the aluminum core accounts for 75-85%, and the copper layer accounts for 15-25%.

[0003] At present, some domestic enterprises use production techniques such as "electroplating method" or "casing method" to produce large-section copper-clad aluminum bars. However, because the copper coating is too thin, rolling and stretching are difficult, and the interface between copper and aluminum is not well bonded, it cannot meet the requirements for use.

[0004] Foreign countries use large-tonnage extrusion machines to produce large-section copper-clad aluminum bars through the process of "hydrostatic extrusion" and "c...

Examples

Embodiment 1

[0012] The manufacturing process of the large-section conductive copper-clad aluminum bar includes the following steps: Continuously cover the brushed large-section aluminum bar with the brushed copper strip, and use high-frequency argon arc to seal the seam formed by the coating. Welding, the seam formed by the cladding is located on one side of the short rectangular side of the aluminum row. Then the copper-clad aluminum billet is stretched, and the stretched copper-clad aluminum billet is placed in a bright annealing furnace for low-temperature diffusion annealing, so that a 2-3um copper-aluminum interface bonding layer is formed between the copper strip and the aluminum row. It can meet the requirements of interfacial metallurgical bonding without affecting the reprocessing performance of the composite material. The annealing temperature is controlled at 300°C and the annealing time is controlled at 60 minutes. The copper-clad aluminum billet after low-temperature diffusion...

Embodiment 2

[0014] The manufacturing process of the large-section conductive copper-clad aluminum bar includes the following steps: Continuously cover the brushed large-section aluminum bar with the brushed copper strip, and use high-frequency argon arc to seal the seam formed by the coating. Welding, the seam formed by the cladding is located on one side of the short rectangular side of the aluminum row. Then the copper-clad aluminum billet is stretched, and the stretched copper-clad aluminum billet is placed in a bright annealing furnace for low-temperature diffusion annealing, so that a 2-3um copper-aluminum interface bonding layer is formed between the copper strip and the aluminum row. It can meet the requirements of interfacial metallurgical bonding without affecting the reprocessing performance of the composite material. The annealing temperature is controlled at 350°C and the annealing time is controlled at 30 minutes. The stretching is controlled with a small amount of deformatio...

Embodiment 3

[0016] The manufacturing process of the large-section conductive copper-clad aluminum bar includes the following steps: Continuously cover the brushed large-section aluminum bar with the brushed copper strip, and use high-frequency argon arc to seal the seam formed by the coating. Welding, the seam formed by the cladding is located on one side of the short rectangular side of the aluminum row. Then the copper-clad aluminum billet is stretched, and the stretched copper-clad aluminum billet is placed in a bright annealing furnace for low-temperature diffusion annealing, so that a 2-3um copper-aluminum interface bonding layer is formed between the copper strip and the aluminum row. It can meet the requirements of interfacial metallurgical bonding without affecting the reprocessing performance of the composite material. The annealing temperature is controlled at 325°C and the annealing time is controlled at 45 minutes. The stretching is controlled with a small amount of deformatio...