Preparation method of high-conductivity aluminum alloy

Abstract

The invention relates to a preparation method of high-conductivity aluminum alloy and belongs to the field of nonferrous metal materials. The preparation method comprises the following steps of: preparing an aluminum ingot comprising the following alloy elements in percentage by weight: 4.5 to 13.5 percent of Si (silicon), 0.1 to 1.5 percent of Mg (magnesium) and not more than 0.1 percent of impurity elements, smelting the aluminum ingot in a furnace, adding 0.1 to 0.3 percent of zirconium which serves as additive for the alloying treatment, uniformly mixing, then adding 0.1 to 1.35 percent of rare-earth element for degeneration, purifying, degassing and deslagging, and covering the surface of aluminum liquid with a solid covering agent; casting to prepare the aluminum alloy conductor material; and carrying out the first-stage aging treatment and the second-stage aging treatment on the aluminum alloy conductor material, discharging and cooling with air. The manufactured aluminum-silicon alloy can meet the requirements on the aluminum alloy material conductivity and the mechanical property; and moreover, the preparation process is simple, the cost is low, and the mass production is easy to realize.

Description

technical field

[0001] The invention relates to a method for manufacturing a conductive aluminum alloy, in particular to a high-conductivity aluminum alloy material suitable for manufacturing power transmission and transformation equipment, and belongs to the field of nonferrous metal materials. technical background

[0002] In the power industry, aluminum and its aluminum alloys play an important role. Due to the particularity of power transmission materials and power operation requirements, there are high requirements for electrical conductivity, strength and air tightness for important electrical fittings on high-voltage power transmission and transformation equipment. Domestically, more focus is on the research direction of high-purity aluminum alloys, by reducing the impurity content in the matrix alloy as much as possible (si≤1%), so as to improve the conductivity of the alloy. While domestic bauxite resources are very rich, but the grade of aluminum is low, and accom...

Examples

Embodiment 1

[0024] Example 1: Take 100 kg of aluminum-silicon alloy (including 14% silicon content), 5 kg of aluminum-magnesium master alloy (10% of magnesium content), 8 kg of aluminum-rare earth master alloy (10% of rare earth content), 0.15 kg of industrial pure zirconium Add the above raw materials in batches to the induction furnace for melting, put the prepared aluminum-silicon alloy into the crucible, heat and melt it with a resistance furnace, add the aluminum-magnesium alloy after it is completely melted, and press it into the alloy with a carbon cover In the solution, stir evenly to make it fully diffused. Then add the zirconium into the alloy solution, continue to stir evenly with an electric motor, and keep warm for 20 to 30 minutes. When the solution cools down to 740°C, add aluminum-rare earth alloy, press it into the bottom of the solution with a carbon cover, and continue to stir evenly. After it melts and fully diffuses, fill it with high-purity argon for purification a...

technical field

[0001] The invention relates to a method for manufacturing a conductive aluminum alloy, in particular to a high-conductivity aluminum alloy material suitable for manufacturing power transmission and transformation equipment, and belongs to the field of nonferrous metal materials. technical background

[0002] In the power industry, aluminum and its aluminum alloys play an important role. Due to the particularity of power transmission materials and power operation requirements, there are high requirements for electrical conductivity, strength and air tightness for important electrical fittings on high-voltage power transmission and transformation equipment. Domestically, more focus is on the research direction of high-purity aluminum alloys, by reducing the impurity content in the matrix alloy as much as possible (si≤1%), so as to improve the conductivity of the alloy. While domestic bauxite resources are very rich, but the grade of aluminum is low, and accom...

Examples

Embodiment 1

[0024] Example 1: Take 100 kg of aluminum-silicon alloy (including 14% silicon content), 5 kg of aluminum-magnesium master alloy (10% of magnesium content), 8 kg of aluminum-rare earth master alloy (10% of rare earth content), 0.15 kg of industrial pure zirconium Add the above raw materials in batches to the induction furnace for melting, put the prepared aluminum-silicon alloy into the crucible, heat and melt it with a resistance furnace, add the aluminum-magnesium alloy after it is completely melted, and press it into the alloy with a carbon cover In the solution, stir evenly to make it fully diffused. Then add the zirconium into the alloy solution, continue to stir evenly with an electric motor, and keep warm for 20 to 30 minutes. When the solution cools down to 740°C, add aluminum-rare earth alloy, press it into the bottom of the solution with a carbon cover, and continue to stir evenly. After it melts and fully diffuses, fill it with high-purity argon for purification a...