excellent aluminum alloy castings and manufacturing method thereof luster

摘要

Mg: 1.5~5.5 wt%, Zn: 1.6~5.0 wt%, Si: 0.4 wt%, Fe: 0.4 wt% or less, Cu: 0.4 wt% or less , Ti: 0.2 wt% or less, B: 0.1 wt% or less and Be: A content of 0.1 wt% or less, after the casting, the resulting aluminum alloy balance being Al and inevitable impurities aluminum alloy casting, in particular, and aluminum wheels for automobiles gloss was measured based on the Z8741 is 100% or more: JIS by polishing the casting. As a result, the aluminum alloy castings while maintaining high strength, toughness and hardness, and has a bright excellent, aluminum wheels for automobiles is provided in particular.