Aluminum Alloy Conductor Texture and Composition
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Solution Overview
Problem
Aluminum alloy conductors used in electrical wirings for movable bodies face challenges in achieving a balance between mechanical strength, electrical conductivity, and resistance to bending fatigue, with existing solutions either being too high in tensile strength for easy installation or compromising on flexibility and conductivity due to additive elements.
Innovation Solution
An aluminum alloy conductor with a recrystallized texture of 40% or more grains having a (111) plane parallel to the wire-drawing direction and grain sizes between 1 to 30 µm, produced through specific working degrees and continuous heat treatment conditions, including rapid heating and quenching, with controlled compositions of Fe, Mg, Si, Cu, Ti, and V to enhance mechanical strength and conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an aluminum alloy conductor with high mechanical strength is used to improve resistance to bending fatigue, then the conductor may become too rigid for easy installation and wire-running operations
Solution Approach 1:
The patent applies parameter changes by precisely controlling the composition ranges of alloying elements (Fe: 0.01-1.5%, Mg: 0.1-1.0%, Si: 0.04-1.0%, Cu: 0.1-0.5%) and processing parameters (working degree 1-6, annealing temperature and time) to achieve optimal balance between mechanical strength and flexibility. This systematic parameter optimization allows the conductor to simultaneously achieve high resistance to bending fatigue and ease of installation.
2Strength
If additive elements are added to improve mechanical strength, then electrical conductivity is lowered due to solid-solution phenomenon
Solution Approach 1:
The patent resolves this contradiction by optimizing the concentration parameters of additive elements within specific ranges that balance strengthening effects with conductivity maintenance. The controlled addition of Fe (0.01-1.5%), Mg (0.1-1.0%), Si (0.04-1.0%), and Cu (0.1-0.5%) along with Ti and V (0.001-0.01%) creates a composition profile that achieves adequate mechanical strength while minimizing conductivity loss.
Solution Approach 2:
The patent employs composite material principles by creating a multi-element aluminum alloy system where different elements work synergistically. The combination of Fe, Mg, Si, Cu, Ti, and V in controlled amounts produces a composite alloy structure that achieves enhanced mechanical properties while maintaining acceptable electrical conductivity through balanced interaction of alloying elements.
3Strength
If alloying elements are added to enhance mechanical strength, then wire breaking occurs during wire-drawing due to formation of excess intermetallic compounds
Solution Approach 1:
The patent applies parameter changes by strictly controlling the composition ranges and processing conditions to prevent excessive intermetallic compound formation. The specified ranges for Fe (0.01-1.5%), Mg (0.1-1.0%), Si (0.04-1.0%), and Cu (0.1-0.5%) along with controlled working degree (1-6) and annealing parameters ensure adequate mechanical strength while maintaining wire-drawing processability by avoiding excess intermetallic precipitation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides an aluminum alloy conductor with excellent mechanical strength, electrical conductivity, and improved resistance to bending fatigue, making it suitable for applications in battery cables, harnesses, and motors on movable bodies like automobiles and aircraft, while maintaining flexibility for easy installation.
Implementation Method 1
rapid heating
Implementation Method 2
quenching
Implementation Method 3
recrystallized texture
Data Source
Figure 1~2
AI summary
{Problems} To provide an aluminum alloy conductor, which has sufficient electrical conductivity and tensile strength, and which is excellent in resistance to bending fatigue. {Solution To Problem} An aluminum alloy conductor, which has a recrystallized texture of 40% or more of an area ratio of grains each having a (111) plane and being positioned in parallel to a cross-section vertical to a wire-drawing direction of a wire, and which has a grain size of 1 to 30 µm on the cross-section vertical to the wire-drawing direction of the wire.