Semi-Solid Precision Forming Process of High-Strength and Wear-Resistant Aluminum Matrix Composites

Abstract:

A layered composite structural model with an outer wear-resistant layer of high-silicon aluminum alloy and an inner layer of ultra-high strength aluminum alloy is designed. A scaling brake drum part with layered composite was prepared by semi-solid precision forming process. The effects of process parameters such as casting temperature, specific pressure, solid layer temperature and heattreatment system on the composite interface were investigated. The results show that the casting temperature and solid layer temperature had a great influence on the interface recombination. The high forming specific pressure could effectively restrain the growth of secondary dendritesof the composite, and the proper heat treatment process could improve the morphology of the composite interface. A scaling brake drum component with A390/7050 layered composite structure was well prepared under optimal conditions.

• Periodical: Materials Science Forum (Volume 993)
• Pages: 756-767
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.993.756
• Online since: May 2020
• Authors: Han Sen Zheng, Zhi Feng Zhang*, Yue Long Bai, Yong Tao Xu, Hao Dong Zhao
• Keywords: Composite Interface, Layered Composites, Process Parameters, Semi-Solid Precision Forming Process

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