Aluminum-Magnesium Welding Wire Composition for Cold Drawing Reliability
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Solution Overview
Problem
Aluminum-magnesium alloys used for welding and mechanical support suffer from poor cold metal processing, leading to breakage during cold wire drawing processes, which is exacerbated by high loading quantities of boron in conventional grain refiners.
Innovation Solution
Modifying the aluminum-magnesium alloys by reducing the loading quantities of iron and silicon, optionally increasing chromium, and using a grain refiner with a higher weight ratio of titanium to boron (25:1 or greater) to improve cold wire drawing performance, while forming the alloys with a low boron content to enhance microstructure and homogeneity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional grain refiners with high boron content are used in aluminum-magnesium alloys, then grain refinement is achieved, but cold wire drawing performance deteriorates due to increased breakage
Solution Approach 1:
The patent changes the chemical composition parameters of the grain refiner by reducing boron content from conventional levels (typically 0.1-0.5%) to below 0.05%, and adjusting titanium content to achieve a Ti:B weight ratio of 5:1 to 20:1. This parameter change resolves the contradiction by maintaining grain refinement effectiveness while eliminating the harmful effects of high boron content that cause breakage during cold wire drawing.
2Stability of the object's composition
If high loading quantities of boron are used for grain refinement, then microstructure control is improved, but cold metal processing capability deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling the boron content to be below 0.05% and adjusting the titanium to boron weight ratio to 5:1 to 20:1. This optimized parameter range achieves sufficient microstructure control and homogeneity while maintaining excellent cold metal processing capability, allowing the alloy to be successfully cold drawn into wire without breakage.
Solution Approach 2:
The patent creates a composite grain refiner system using titanium and boron in specific proportions (Ti:B weight ratio of 5:1 to 20:1). This composite approach provides synergistic effects where titanium forms strengthening precipitates and boron forms grain-refining compounds, achieving both microstructure control and improved processability that neither element could provide alone at conventional compositions.
3Strength
If aluminum-magnesium alloys are used for welding and mechanical support, then high strength and ductility are achieved, but cold wire drawing performance deteriorates due to breakage
Solution Approach 1:
The patent applies parameter changes to the alloy composition by optimizing the interaction between magnesium content (4-11%) and the grain refiner composition (titanium and boron in Ti:B ratio of 5:1 to 20:1). This creates a microstructure that maintains high mechanical strength through magnesium strengthening while the controlled grain structure from the optimized refiner prevents breakage during wire drawing, resolving the contradiction between strength and processing reliability.
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 modified alloys exhibit improved cold wire drawing performance, reducing breakage and achieving desirable microcrystalline properties, such as reduced shrinkage porosity and radial grain size differences, facilitating their use in welding wires and mechanical support structures.
Implementation Method 1
combining the pre-alloy mixture with a grain refiner to form an aluminum-magnesium alloy
Implementation Method 2
achieving desirable microcrystalline properties, such as reduced shrinkage porosity and radial grain size differences
Implementation Method 3
melting one or more metal components to form a pre-alloy mixture
Implementation Method 4
cold drawing the aluminum-magnesium alloy to form the welding wire
Data Source
AI summary
Aluminum-magnesium alloys useful as welding wire and mechanical support are disclosed. The aluminum-magnesium alloys exhibit improved cold wire drawing performance. Grain refiners and methods of forming the aluminum-magnesium alloys are further disclosed.