High Purity Copper Alloy Inert Gas Bubbling
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Solution Overview
Problem
Copper-based alloys often contain impurities like oxygen and oxygen-related defects, which degrade their mechanical properties and lead to increased failure rates and production costs, necessitating improved methods for reducing impurity content during the manufacturing process.
Innovation Solution
An apparatus and method involving an enclosed melting furnace that forms a molten copper-based alloy under an inert atmosphere, with inert gas bubbling to remove impurities, and a transfer ladle that controls velocity to prevent reintroduction of oxygen and oxygen-related impurities, ensuring low oxygen content throughout the solidification process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional melting methods are used, then production cost is reduced, but impurity content (oxygen and oxygen-related defects) increases
Solution Approach 1:
The patent applies inert atmosphere by enclosing the melting furnace and filling it with inert gas (such as nitrogen or argon) to prevent oxidation of copper-based alloys during melting and casting. This eliminates oxygen pickup from air, reducing oxygen-related impurities without requiring expensive vacuum equipment or complex purification systems, thus achieving low impurity content at moderate cost.
Solution Approach 2:
The patent extracts harmful oxygen and oxygen-related impurities from the molten copper-based alloy by allowing the molten metal to contact with inert gas atmosphere during melting and transfer, and by using controlled pouring techniques that minimize air exposure. This selective removal of harmful elements achieves high purity without adding complex purification equipment.
2Reliability
If velocity control is not implemented, then transfer process is simpler, but oxygen reintroduction occurs
Solution Approach 1:
The patent applies preliminary action by controlling the velocity of molten metal transfer before the metal contacts air. The ladle design and pouring technique are predetermined to maintain low velocity throughout the transfer process, preventing turbulence and air entrainment. This preliminary velocity control ensures oxygen-free transfer without requiring active control systems or complex mechanisms.
3Loss of substance
If inert gas bubbling is used, then impurity removal is improved, but energy consumption increases
Solution Approach 1:
The patent applies self-service by utilizing the natural buoyancy and rising motion of inert gas bubbles through the molten metal to achieve impurity removal. The inert gas is introduced at the bottom of the melting furnace and bubbles upward through the molten alloy, carrying oxides and impurities to the surface where they can be removed. This passive bubble rise process requires minimal energy input compared to active stirring or pumping systems.
Data Source
AI summary
In an aspect, a method of manufacturing a high purity copper-based alloy comprises providing in a melting furnace a feedstock and melting the feedstock. The method additionally includes bubbling an inert gas into the molten copper-based alloy to form the high purity copper-based alloy. Aspects are also directed to an apparatus and a method of fabricating an apparatus for manufacturing the high purity copper-based alloy.