Heat treatment method of aluminum alloy for automotive body
A heat treatment method and technology for automobile bodies, applied in the field of aluminum alloys, can solve the problems of reduced material formability, poor flanging ductility, high Cu content, etc., and achieve high paint strength, formability, and optimization of formability
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[0022] Example 1
[0023] The components of the aluminum alloy are calculated by mass percentage: Si 1.90 wt%, Mg 0.40 wt%, Mn 0.1 wt%, Fe 0.0.12 wt%, Cu 0.10 wt%, Ti 0.08 wt%, Cr 0.07 wt%, and the balance is Al. After homogenization treatment, the aluminum alloy ingot is hot-rolled and cold-rolled to a 1mm sheet; the sheet is solution-treated and then water-quenched, and then pre-aged: 100℃×10min. Two weeks after natural aging, simulated baking paint treatment (2% stretching + 175℃ × 30min).
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[0024] Example 2
[0025] The components of the aluminum alloy in terms of mass percentage are: Si 1.70 wt%, Mg 0.60 wt%, Mn 0.2 wt%, Fe 0.10 wt%, Cu 0.09 wt%, Ti 0.08 wt%, Cr 0.05 wt%, and the balance is Al . After homogenization treatment, the aluminum alloy ingot is hot-rolled and cold-rolled to a 1mm thin plate; the thin plate is solution treated and then water quenched, and then pre-aged: 200℃×5s. Two weeks after natural aging, simulated baking paint treatment (2% stretching + 175℃ × 30min).
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[0026] Example 3
[0027] The components of the aluminum alloy in terms of mass percentages are: Si 1.8 wt%, Mg 0.50 wt%, Mn 0.05 wt%, Fe 0.11 wt%, Cu 0.05 wt%, Ti 0.10 wt%, Cr 0.05 wt%, and the balance is Al. After homogenization treatment, the aluminum alloy ingot is hot-rolled and cold-rolled to a 1mm thin plate; the thin plate is solution treated and then water quenched, and then pre-aged: 150℃×10min. Two weeks after natural aging, simulated baking paint treatment (2% stretching + 175℃ × 30min).
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