| 摘要 |
PURPOSE:To produce a high strength Al alloy product having superior partial corrosion resistance by coating a prescribed part of an Al alloy member with zinc and successively subjecting the member to soln. heat treatment and aging. CONSTITUTION:A prescribed part of an Al alloy member made of A6061 or A6063 alloy, e.g., the cooling water passage of a disk clamp hub is coated as usual with zinc to about 0.2-3.0mum thickness. The member is then subjected to soln. heat treatment at about 530 deg.C. After the zinc is diffused simultaneously with the treatment, the member is aged. Thus, a high strength A4l alloy product having superior partial corrosion resistance is obtd. at a low cost.
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