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Aðferð til að framleiða ál-málmblönduplötur sem hafa góða beygjueiginleika og ál-málmblönduplötur framleiddar þannig
Aðferð til að framleiða ál-málmblönduplötur sem hafa góða beygjueiginleika og ál-málmblönduplötur framleiddar þannig
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机译:具有良好弯曲性能的铝合金板的制造方法以及以此方式制造的铝合金板
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摘要
A process is described for producing an aluminum alloy sheet having excellent bendability for use in forming panels for automobiles. An aluminum alloy is used containing 0.5-0.75% by weight Mg, 0.7-0.85% by weight Si, 0.15-0.35% by weight Mn and 0.1-0.3% by weight Fe and the remainder Al and incidental impurities. The alloy is formed into ingot by semi-continuous casting and the cast alloy ingot is subjected to hot rolling and cold rolling, followed by solution heat treatment of the formed sheet. The sheet material is pre-aged by rapidly cooling from an initial pre-aging temperature of at least 80° C. to room temperature at a cooling rate of more than 5° C./hour.
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