HIGH STRENGTH ALUMINUM ALLOY FOR MACHINE STRUCTURAL BODY

摘要

PURPOSE:To evade the adverse effect of an Hz gas on the title alloy without executing degas treatment and to improve its fatigue strength by incorporating small amounts of hydride-formation components such as Ti, Zr and Cr into an Al alloy contg. specified Si, Cu, Mg, Fe and Mn. CONSTITUTION:The title Al alloy is formed with the compsn. constituted of, by weight, 12 to 28% Si, 0.8 to 5% Cu, 0.3 to 3.5% Mg, 2 to 10% Fe, 0.5 to 2.9% Mn and 0.2 to 4% of one or more kinds of hydride-formation components selected from Ti, Zr, Co, Pd and Ni. In the Al alloy, adverse effect is evaded without executing degas greatment and high fatigue strength is shown.