Microstructure and Hardness of Al–Sn Alloys by Electromagnetic Stirring and Pulse Treatment
Al–Sn alloy is an alloy for industrial use that requires wear resistance, strength and durability such as the representative bearing material. The content of the Sn is used vary from 5 to 40, a small amount of Cu and Si are added for strength, elongation, and castability. In this regard, each of the electromagnetic stirring and pulse treatment was applied to Al–25%Sn, Al–40%Sn alloy, and compared to the specimen that was made by general GBF treatment through such a procedure, the analysis about the effect of each melt treatment method to microstructure was done. Most effective result of Sn particle refinement has been obtained by EMS for 10 minutes in Al–25Sn alloy. It shows high efficiency of emulsification of Sn particles. And the microstructure of pulse treated micro structure was little coarse than EMS. But it have effect for Al matrix refinement. By pulse treatment of 50 seconds in Al–25Sn, it shows 21.3∼21.5 μm of DAS.
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Document Type: Research Article
Publication date: October 1, 2018
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