A high-performance cooper-coated aluminum rectangle section compound conductive bus bar and its making technology

Abstract

The present invention provides a high-performance copper-clad aluminum cross section composite conductive bus-bar and the preparing technique thereof, and the invention relates to a rectangle-cross section bimetal composite material and the preparation thereof. The copper-clad aluminum rectangular cross section composite conductive bus-bar is compounded by the core-part aluminum and the coating layer copper. The area proportion of the coating copper layer is 15to 50 The technique comprises the following procedures: Adopting horizontal continuous casting for directly compounding and forming the copper-clad aluminum composite blank. Commonly flat-roller rolling and finish drawing-pulling the copper-clad aluminum blank according to requirement or rolling with the flat roller provided with a vertical roller, the range of the rolling speed is 3-50m / min, and the single-pass relative reduction is between 15and 40 The speed range of finish drawing-pulling is 1-20m / min and the single-pass cross section scalage is 10%. When the multiple-pass relative reduction is up to 70%, the low-temperature intermediate annealing is executed to the copper-clad aluminum composite conductive bus-bar. The annealing temperature is between 250 and 450 DEG C and the annealing time is between 0.5 and 3h. The annealed composite conductive bus-bar is executed with hole-form rolling or drawing. The invention not only can produce the high-performance copper-clad aluminum cross section composite conductive bus-bar, but also has the advantages of short process flow and high efficiency of the producing method.

Description

technical field

[0001] The invention relates to a rectangular cross-section bimetallic composite material and a preparation method thereof, in particular to a high-performance copper-clad aluminum rectangular cross-section composite conductive busbar and a production method thereof. Background technique

[0002] Copper-clad aluminum composite conductor is a new type of bimetallic composite conductor, which has the advantages of good electrical conductivity, low density, and low cost. Among them, its typical product, copper-clad aluminum rectangular cross-section composite conductive busbar, has high cost performance and can be It replaces the existing pure copper rectangular conductive busbar, and is widely used in industries such as electric power, busway, high and low voltage switchgear.

[0003] The production methods of copper-clad aluminum rectangular cross-section composite conductive busbars that have been publicly reported are as follows: (1) using aluminum cores and...

Examples

Embodiment 1

[0015] Embodiment 1: Preparation of a copper-clad aluminum conductive busbar with a size of 80×8 mm.

[0016] ① The copper-clad aluminum composite billet with an outer diameter of φ60mm was prepared by direct composite molding by horizontal continuous casting, and the area ratio of the copper layer was 25%. The process conditions are: the temperature of molten copper is 1200°C, the temperature of molten aluminum is 785°C, and the continuous casting speed is 90mm / min;

[0017] ②Using flat roll cold rolling to make 82×8.1mm copper-clad aluminum flat strip. The rolling speed is 5m / min, and the relative reduction in a single pass is 20% to 50%. Among them, when the thickness of the billet is 60 to 22mm, the relative reduction in a single pass is 40% on average, and the reduction is divided into 2 passes; When the thickness of the billet is 22-11mm, the average relative reduction in a single pass is 30%, and the reduction is divided into 2 passes; when the thickness of the billet ...

Embodiment 2

[0020] Example 2: Preparation of a copper-clad aluminum conductive busbar with a size of 100×10 mm.

[0021] ① Horizontal continuous casting direct compound forming to prepare copper-clad aluminum composite billet with an outer diameter of φ75mm, and the area ratio of copper layer is 30%. The process conditions are: the temperature of molten copper is 1190℃~1200℃, the temperature of molten aluminum is 770~780℃, and the continuous casting speed is 80mm / min;

[0022] ②Using flat roll cold rolling to make 103×10.2mm copper-clad aluminum flat strip. The rolling speed is 10m / min, and the relative reduction in a single pass is 20% to 50%. Among them, when the billet thickness is 75 to 27mm, the average relative reduction in a single pass is 40%, and the reduction is divided into 2 passes; When the thickness of the billet is 27-13mm, the average relative reduction in a single pass is 30%, and the reduction is divided into 2 passes; when the thickness of the billet is 13-10mm, the av...

technical field

[0001] The invention relates to a rectangular cross-section bimetallic composite material and a preparation method thereof, in particular to a high-performance copper-clad aluminum rectangular cross-section composite conductive busbar and a production method thereof. Background technique

[0002] Copper-clad aluminum composite conductor is a new type of bimetallic composite conductor, which has the advantages of good electrical conductivity, low density, and low cost. Among them, its typical product, copper-clad aluminum rectangular cross-section composite conductive busbar, has high cost performance and can be It replaces the existing pure copper rectangular conductive busbar, and is widely used in industries such as electric power, busway, high and low voltage switchgear.

[0003] The production methods of copper-clad aluminum rectangular cross-section composite conductive busbars that have been publicly reported are as follows: (1) using aluminum cores and...

Examples

Embodiment 1

[0015] Embodiment 1: Preparation of a copper-clad aluminum conductive busbar with a size of 80×8 mm.

[0016] ① The copper-clad aluminum composite billet with an outer diameter of φ60mm was prepared by direct composite molding by horizontal continuous casting, and the area ratio of the copper layer was 25%. The process conditions are: the temperature of molten copper is 1200°C, the temperature of molten aluminum is 785°C, and the continuous casting speed is 90mm / min;

[0017] ②Using flat roll cold rolling to make 82×8.1mm copper-clad aluminum flat strip. The rolling speed is 5m / min, and the relative reduction in a single pass is 20% to 50%. Among them, when the thickness of the billet is 60 to 22mm, the relative reduction in a single pass is 40% on average, and the reduction is divided into 2 passes; When the thickness of the billet is 22-11mm, the average relative reduction in a single pass is 30%, and the reduction is divided into 2 passes; when the thickness of the billet ...

Embodiment 2

[0020] Example 2: Preparation of a copper-clad aluminum conductive busbar with a size of 100×10 mm.

[0021] ① Horizontal continuous casting direct compound forming to prepare copper-clad aluminum composite billet with an outer diameter of φ75mm, and the area ratio of copper layer is 30%. The process conditions are: the temperature of molten copper is 1190℃~1200℃, the temperature of molten aluminum is 770~780℃, and the continuous casting speed is 80mm / min;

[0022] ②Using flat roll cold rolling to make 103×10.2mm copper-clad aluminum flat strip. The rolling speed is 10m / min, and the relative reduction in a single pass is 20% to 50%. Among them, when the billet thickness is 75 to 27mm, the average relative reduction in a single pass is 40%, and the reduction is divided into 2 passes; When the thickness of the billet is 27-13mm, the average relative reduction in a single pass is 30%, and the reduction is divided into 2 passes; when the thickness of the billet is 13-10mm, the av...