Manufacturing method of aluminum alloy hub
A technology of an aluminum alloy wheel hub and a manufacturing method, which is applied in wheel manufacturing, wheel hubs, wheels, etc., can solve the problems of long production cycle and high energy consumption, and achieve short preheating time, stable mechanical properties, high yield strength and elongation. Effect
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[0054] Take a 17-inch automotive aluminum alloy wheel as an example:
[0055] The chemical composition is Mg 6.4%, Mn 0.65%, Cr 0.05%, Be0.002%, Ti0.06%, Si0.12%, Fe0.21%, Al not less than 92.5% (the rest are unavoidable impurities ) Al-Mg alloy hot-rolled plate punched into a round cake-shaped blank with a size of Φ350×65mm;
[0056] Preheat the round cake-shaped blank to 450°C; before the forging work, preheat the mold to 430°C in 20 minutes, separate the upper mold and the lower mold, spray lubricant on the working surface of the mold, and put the high-temperature preheated round Put the cake-shaped blank into the mold, and extrude it with a forging press to make a forging blank, so that the wheel hub is initially formed;
[0057] Heat the forging blank to 350°C, spin the forging blank into a hollow rotating body hub on the spinning machine; then keep the spinning blank in a continuous annealing furnace at 200°C for 2 hours; finally machine the hub and perform subsequent s...
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