Effect of Extrusion Temperature on Properties and Surface of AA6063 Chips

9 pages•Published: August 6, 2026

Takumi Miyazaki, Tatsuya Funazuka, Tomomi Shiratori, Numpon Mahayotsanun and Kuniaki Dohda

Abstract

Aluminum (Al) is highly recyclable, with the energy required to produce recycled ingots estimated to be approximately 3-5% of that needed for new ingot production. To further expand the application of recycled Al extruded products, accelerating horizontal recycling from wrought material to wrought material is necessary. A key factor hindering horizontal recycling of Al is that these recycling methods involve a casting process, where removing and neutralizing impurities introduced during casting poses a significant challenge. Since aluminum recycling currently relies on casting processes, solid-state recycling methods like extrusion processing for horizontal recycling from wrought material to wrought material are anticipated. This study aimed to achieve direct recycling of AA6063 alloy chip wastes via hot extrusion by applying stronger shear deformation to the internal material through flow separation and compression behavior using a pseudo-porthole die. Hot extrusion experiments were conducted using billet made from compacted chips of AA6063 alloy waste. The effects of extrusion temperature on extrusion properties, such as extrusion force, product surface quality, and tensile characteristics, were investigated. Increasing the extrusion temperature reduced the extrusion force. Higher extrusion temperatures improved the adhesion between individual chips, suppressed surface defects, and enhanced the tensile strength of the product.

Keyphrases: aa6063 aluminum chip, chip adhesion, direct recycling, hot extrusion

In: Numpon Mahayotsanun (editor). Proceedings of The 11th International Conference on Tribology in Manufacturing Processes & Advanced Surface Engineering, vol 4, pages 40-48.

Links:	https://easychair.org/publications/paper/knNT
	https://doi.org/10.29007/qn5p

BibTeX entry

@inproceedings{ICTMP2026:Effect_Extrusion_Temperature_Properties,
  author    = {Takumi Miyazaki and Tatsuya Funazuka and Tomomi Shiratori and Numpon Mahayotsanun and Kuniaki Dohda},
  title     = {Effect of Extrusion Temperature on Properties and Surface of AA6063 Chips},
  booktitle = {Proceedings of The 11th International Conference on Tribology in Manufacturing Processes & Advanced Surface Engineering},
  editor    = {Numpon Mahayotsanun},
  series    = {EPiC Series in Technology},
  volume    = {4},
  publisher = {EasyChair},
  bibsource = {EasyChair, https://easychair.org},
  issn      = {2516-2322},
  url       = {/publications/paper/knNT},
  doi       = {10.29007/qn5p},
  pages     = {40-48},
  year      = {2026}}

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