Cast Aluminum Alloy Composition Without Post-Cast Heat Treatment
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Solution Overview
Problem
The manufacturing process of electric vehicles relies heavily on energy-intensive heat treatment of aluminum alloys, leading to greenhouse gas emissions and dimensional deformation, which affects assembly accuracy and increases scrap rates.
Innovation Solution
A high-pressure cast aluminum alloy composition comprising 7-9 wt% Si, 0.2-0.7 wt% Mn, 0.09-0.4 wt% Fe, 0.1-0.3 wt% V, 0.1-0.2 wt% Ti, and 0.01-0.03 wt% Sr, with a Mn/Fe ratio ≥1, allowing for heat-treatment-free processing and achieving desired mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If heat treatment process is applied to aluminum alloy, then mechanical properties are improved, but energy consumption increases and greenhouse gas emissions are generated
Solution Approach 1:
The patent changes the chemical composition parameters of the aluminum alloy by precisely controlling the content of alloying elements (Si: 7-9%, Mn: 0.2-0.7%, Fe: 0.09-0.4%, V: 0.1-0.3%, Ti: 0.1-0.2%, Sr: 0.01-0.03%) to achieve the desired mechanical properties through composition optimization rather than thermal processing
Solution Approach 2:
The patent performs preliminary alloy design and composition adjustment before casting, incorporating specific alloying elements in predetermined ratios to pre-establish the microstructure and mechanical properties, eliminating the need for subsequent heat treatment processes
2Strength
If heat treatment process is applied to aluminum alloy, then mechanical properties are improved, but dimensional deformation occurs affecting assembly accuracy
Solution Approach 1:
The patent modifies the chemical composition parameters to create an alloy system that naturally maintains dimensional stability during service, using specific ratios of Mn to Fe (Mn/Fe ≥ 1) and controlled Sr content to prevent microstructural changes that would cause dimensional deformation
Solution Approach 2:
The patent replaces the heat treatment process (a complex, energy-intensive operation) with a simpler casting process that directly produces parts with the required mechanical properties and dimensional accuracy, eliminating the intermediate heat treatment step that causes dimensional deformation
3Strength
If heat treatment process is applied to aluminum alloy, then mechanical properties are improved, but production time and scrap rate increase
Solution Approach 1:
The patent performs preliminary alloy design and composition optimization before casting, ensuring that the alloy achieves the required mechanical properties directly from the casting process, thereby eliminating subsequent heat treatment steps and associated production delays
Solution Approach 2:
The patent extracts and removes the heat treatment process from the manufacturing workflow by designing an alloy composition that achieves the desired mechanical properties through casting alone, simplifying the production process and improving efficiency
Data Source
AI summary
The disclosure relates to an aluminum alloy and a component part prepared therefrom. The aluminum alloy comprises: 7-9 wt % of silicon (Si), 0.2-0.7 wt % of manganese (Mn), 0.09-0.4 wt % of iron (Fe), 0.1-0.3 wt % of vanadium (V), 0.1-0.2 wt % of titanium (Ti), 0.01-0.03 wt % of strontium (Sr), and the balance being aluminum and inevitable impurities, wherein the weight ratio of the manganese (Mn) to the iron (Fe) is not less than 1. The aluminum alloy of the disclosure can be exempt from heat treatment process after casting in the processing process, so as to contribute to energy conservation and emission reduction, and the component part prepared therefrom can achieve desired mechanical properties.