Hardness Enhancement in Al-Si Alloy Through Combined Pressing and Heat Treatment with Coconut Shell Charcoal Media

Masyrukan; Agung Setyo Darmawan; Agus Yulianto; Abdul Hamid

doi:10.56801/MME1099

Authors

Masyrukan Universitas Muhammadiyah Surakarta
Agung Setyo Darmawan Universitas Muhammadiyah Surakarta
Agus Yulianto Universitas Muhammadiyah Surakarta
Abdul Hamid Universiti Tun Hussein Onn Malaysia

DOI:

https://doi.org/10.56801/MME1099

Keywords:

Al-Si, Carburizing, Coconut Shell, Hardness

Abstract

The study investigated the enhancement of hardness in Al-Si alloy through a combination of pressing and heat treatment using coconut shell charcoal media. Utilizing a novel approach, the alloy specimens were subjected to heat treatment at 450°C followed by a brief pressing process and an artificial aging treatment. The results revealed a significant increase in surface hardness from 76.32 VHN to 133 VHN, attributed to the formation of aluminum carbide (Al₄C₃) and aluminum oxide (Al₂O₃) on the alloy surface. This suggested that the combined treatment process effectively improves the mechanical properties of the Al-Si alloy, making it suitable for applications requiring enhanced wear resistance and durability.

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