To provide an aluminum alloy forged wheel having toughness and high rigidity, and having high heat resistance, while having light weight.SOLUTION: An aluminum alloy forged wheel is a wheel including a hub part to which an axle is mounted, a disc part provided to a hub part periphery and a rim part provided to a periphery part of the disc, in which one or both of at least the disc part and the rim part is formed by forging a billet obtained by casting an aluminum alloy that contains Si:9.0 to 12.5 mass%, Cu:0.5 to 3.4 mass%, Mg:0.2 to 0.9 mass%, Fe:0.7 mass% or smaller, Ti:0.005 to 0.15 mass%, and any one kind of Sr, Sb, Ca, and Na containing in the range of Sr:0.01 to 0.15 mass%, Sb:0.01 to 0.20 mass%, Ca:10 to 200 mass.ppm, Na:10 to 200 mass.ppm, the balance is Al and inevitable impurities, and a metallurgical structure of one or both of the disc part and the rim part has a width of a belt-like zone in which Si particles are sparse is 20 μm or smaller, and an average particle size of eutectic silicon is 5 μm or smaller.SELECTED DRAWING: Figure 1
【課題】軽量でありながら、強靱であり且つ高剛性であり、耐熱強度が高いアルミニウム合金鍛造ホイールを提供する。【解決手段】アルミ合金製鍛造ホイールは、車軸が装着されるハブ部とハブ部周縁に設けられたディスク部とディスク部周縁に設けられたリム部を備えるホイールであって、少なくともディスク部とリム部の一方又は両方が、Si:9.0〜12.5質量%、Cu:0.5〜3.4質量%、Mg:0.2〜0.9質量%、Fe:0.7質量%以下、Ti:0.005〜0.15質量%を含有し、Sr、Sb、Ca、Naのいずれか一種を、Sr:0.01〜0.15質量%、Sb:0.01〜0.20質量%、Ca:10〜200質量ppm、Na:10〜200質量ppm含有し、残部がAl及び不可避不純物であるアルミニウム合金を鋳造して得たビレットを鍛造して成り、ディスク部とリム部の一方又は両方の金属組織が、Si粒子が疎らな帯状ゾーンの幅が20μm以下であり、且つ共晶Siの平均粒径が5μm以下である。【選択図】図1
ALUMINUM ALLOY FORGED WHEEL AND ITS PRODUCTION METHOD, CASTING BILLET FOR PRODUCING FORGED WHEEL
アルミニウム合金鍛造ホイール及びその製造方法、鍛造ホイール形成用鋳造ビレット
2020-08-20
Patent
Elektronische Ressource
Japanisch
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