A copper adulterated aluminum complex flat line and its making method

Abstract

The invention relates to a copper-clad aluminum composite flat wire and a preparation method thereof, relating to bimetal layered composite materials. The copper-clad aluminum composite flat wire is formed by composition of sandwich layer aluminum and clad copper, and the area ratio of the copper clad is 15 percent to 40 percent. The preparation steps are as follows: copper-clad aluminum composite blanks are directly compounded and formed by adoption of horizontal continuous casting; multi-pass groove rolling and / or multi-pass drawing is performed on the copper-clad aluminum blanks as required; the rolling speed of 3 to 60 meters per minute is adopted, and the single-pass relative percent reduction is 20 percent to 40 percent; or the drawing speed of 2 to 30 meters per minute is adopted, and the single-pass section scalage is 10 percent to 25 percent; under the condition of multi-pass processing and that the overall section scalage of the copper-clad aluminum composite materials reaches 75 percent to 95 percent, low-temperature intermediate annealing is performed on the copper-clad aluminum composite materials; the annealing temperature is 200 to 450 DEG C; the annealing time is 0.5 to 2 hours; the blanks after annealing are rolled or drawn further, and the copper-clad aluminum composite flat wire with required section shape and size is prepared. The invention not only can prepare the high performance copper-clad aluminum composite flat wire but also has high production efficiency.

Description

technical field

[0001] The invention relates to a bimetal layered composite material and an efficient preparation method thereof, in particular to a copper-clad aluminum composite flat wire and an efficient preparation method thereof. Background technique

[0002] Copper-clad aluminum composite flat wire is a new type of bimetal composite special-shaped wire, which has the advantages of good electrical conductivity, low density, low cost and wide application. Copper-clad aluminum composite flat wire has high cost performance and can be widely used in the manufacture of windings for motors, transformers and electrical equipment, and the installation of power distribution equipment.

[0003] The processing method of the copper-clad aluminum composite flat wire that has been publicly reported is prepared by rolling the round copper-clad aluminum composite wire prepared by the cladding welding method, and then passing the mold drawing and shaping and then heat treatment [Ge Chen...

Examples

Embodiment 1

[0014] Example 1: Preparation of a copper-clad aluminum composite flat wire with a size of 2×12 mm.

[0015] ① The φ40mm copper-clad aluminum composite billet was prepared by horizontal continuous casting direct composite forming method, and the area ratio of the copper layer in the cross section was 30%. The process conditions are: the temperature of molten copper is 1210°C, the temperature of molten aluminum is 780°C, and the continuous casting speed is 80mm / min;

[0016] ②Use the drawing method to process the blank, and draw it into a φ9mm copper-clad aluminum composite round wire through 15-pass drawing. The drawing speed is 3m / min, and the single-pass section reduction rate is 15% to 25%. When the diameter is φ40-25mm, the average section reduction rate is 24%, a total of 4 passes; when the diameter is φ25-15mm, the average section reduction rate The reduction rate is 20%, a total of 5 passes; when the diameter is φ15-9mm, the average section reduction rate is 16%, a tot...

Embodiment 2

[0019] Example 2: Preparation of a copper-clad aluminum composite flat wire with a size of 1.4×12 mm.

[0020] ① The φ40mm copper-clad aluminum composite billet was prepared by horizontal continuous casting direct composite forming method, and the area ratio of the copper layer in the cross section was 30%. The process conditions are: the temperature of molten copper is 1200°C, the temperature of molten aluminum is 775°C, and the continuous casting speed is 85mm / min;

[0021] ②Use the drawing method to process the blank, and draw it into a φ9mm copper-clad aluminum composite round wire through 15-pass drawing. The drawing speed is 3m / min, and the single-pass section reduction rate is 15%-25%. When the diameter is φ40-25mm, the single-pass average section reduction rate is 24%, a total of 4 passes; when the diameter is φ25-15mm , the average section reduction rate of a single pass is 20%, a total of 5 passes; when the diameter is φ15-9mm, the average section reduction rate of ...

technical field

[0001] The invention relates to a bimetal layered composite material and an efficient preparation method thereof, in particular to a copper-clad aluminum composite flat wire and an efficient preparation method thereof. Background technique

[0002] Copper-clad aluminum composite flat wire is a new type of bimetal composite special-shaped wire, which has the advantages of good electrical conductivity, low density, low cost and wide application. Copper-clad aluminum composite flat wire has high cost performance and can be widely used in the manufacture of windings for motors, transformers and electrical equipment, and the installation of power distribution equipment.

[0003] The processing method of the copper-clad aluminum composite flat wire that has been publicly reported is prepared by rolling the round copper-clad aluminum composite wire prepared by the cladding welding method, and then passing the mold drawing and shaping and then heat treatment [Ge Chen...

Examples

Embodiment 1

[0014] Example 1: Preparation of a copper-clad aluminum composite flat wire with a size of 2×12 mm.

[0015] ① The φ40mm copper-clad aluminum composite billet was prepared by horizontal continuous casting direct composite forming method, and the area ratio of the copper layer in the cross section was 30%. The process conditions are: the temperature of molten copper is 1210°C, the temperature of molten aluminum is 780°C, and the continuous casting speed is 80mm / min;

[0016] ②Use the drawing method to process the blank, and draw it into a φ9mm copper-clad aluminum composite round wire through 15-pass drawing. The drawing speed is 3m / min, and the single-pass section reduction rate is 15% to 25%. When the diameter is φ40-25mm, the average section reduction rate is 24%, a total of 4 passes; when the diameter is φ25-15mm, the average section reduction rate The reduction rate is 20%, a total of 5 passes; when the diameter is φ15-9mm, the average section reduction rate is 16%, a tot...

Embodiment 2

[0019] Example 2: Preparation of a copper-clad aluminum composite flat wire with a size of 1.4×12 mm.

[0020] ① The φ40mm copper-clad aluminum composite billet was prepared by horizontal continuous casting direct composite forming method, and the area ratio of the copper layer in the cross section was 30%. The process conditions are: the temperature of molten copper is 1200°C, the temperature of molten aluminum is 775°C, and the continuous casting speed is 85mm / min;

[0021] ②Use the drawing method to process the blank, and draw it into a φ9mm copper-clad aluminum composite round wire through 15-pass drawing. The drawing speed is 3m / min, and the single-pass section reduction rate is 15%-25%. When the diameter is φ40-25mm, the single-pass average section reduction rate is 24%, a total of 4 passes; when the diameter is φ25-15mm , the average section reduction rate of a single pass is 20%, a total of 5 passes; when the diameter is φ15-9mm, the average section reduction rate of ...