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ROLLED OR EXTRUDED ALUMINIUM AL-MN ALLOY PRODUCTS WITH IMPROVED CORROSION RESISTANCE
ROLLED OR EXTRUDED ALUMINIUM AL-MN ALLOY PRODUCTS WITH IMPROVED CORROSION RESISTANCE
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机译:耐腐蚀性能提高的轧制或挤压铝铝合金产品
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摘要
The invention concerns a rolled or extruded product, in particular a tube, made of an alloy composition (expressed in wt. %) comprising: Si 0.30; Fe 0.20-0.50; Cu 0.05; Mn 0.5-1.2; Mg 0.05; Zn 0.50; Cr 0.10-0.30; Ti 0.05; Zr 0.05; the balance consisting of aluminium and unavoidable impurities. The invention also concerns a method for making extruded tubes of said composition comprising casting a billet, optionally homogenizing it, extruding a tube, drawing said tube in one or several passes and continuous annealing at a temperature ranging between 350 and 500 °C with a temperature increase of less than 10 seconds. The inventive products are designed for pipes and heat exchangers for motor vehicles, and exhibit good corrosion resistance.
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机译:本发明涉及由合金组合物(以重量%表示)制成的轧制或挤出产品,特别是管,该合金组合物包含:Si <0.30;和铁0.20-0.50;铜<0.05;锰0.5-1.2;镁<0.05;锌<0.50;铬0.10-0.30; Ti <0.05; Zr <0.05;其余部分由铝和不可避免的杂质组成。本发明还涉及一种制备所述组合物的挤出管的方法,该方法包括浇铸坯料,任选地对其进行均质化,挤出管,一次或多次通过拉伸所述管,并在350-500℃的温度范围内以一定温度连续退火。增加少于10秒。本发明产品设计用于机动车辆的管道和热交换器,并表现出良好的耐腐蚀性。
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