PRECIPITATION-HARDENING TYPE Al-Si BASED ALUMINUM ALLOY CASTING

摘要

PROBLEM TO BE SOLVED: To provide a product comprising aluminum casting, in which thermal fatigue characteristic is improved as compared with the conventional casting. SOLUTION: A precipitation-hardening type Al-Si based aluminum alloy casting can be obtained. In crystal grains on a surface layer structure in the alloy casting, the ones having circularity of 0.6-0.8 occupy≥70% of the whole grains. COPYRIGHT: (C)2009,JPO&INPIT