Coating on Magnesium Alloy with Super Duralumin by Hot Extrusion and Evaluation of Its Surface Properties

IF 0.5 4区 材料科学 Q4 METALLURGY & METALLURGICAL ENGINEERING
T. Tokunaga, Kazushi Sotomoto, M. Ohno, K. Matsuura
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引用次数: 2

Abstract

The poor corrosion resistance of Mg alloys, which is well known as one of the lightest structural metal materials, limits a wide use of these alloys. In order to dramatically increase not only the corrosion resistance but also the surface hardness of Mg alloys (AZ80), coating with A2024 Al alloy by hot extrusion has been attempted in this study. The coating was successfully realized by hot extrusion of a Mg alloy (AZ80) billet together with an Al alloy plate placed between the billet and the extrusion die. The A2024 Al alloy-coated Mg alloy exhibited an excellent corrosion resistance and no weight loss was observed after immersion in a 5 mass% HCl aqueous solution for 10 min while a weight loss of about 1500 g・m−2 was observed in case of AZ80 Mg alloy without coating under the same condition. The surface hardness of the coated alloy was increased to about 85 HV by aging for 144 h at room temperature after solution treatment for 3 h at 673 K. [doi:10.2320/matertrans.M2017317]
超级硬铝热挤压镁合金涂层及其表面性能评价
镁合金作为最轻的结构金属材料之一,其耐腐蚀性能差,限制了镁合金的广泛应用。为了大幅度提高镁合金(AZ80)的耐蚀性和表面硬度,本研究尝试采用热挤压法制备A2024铝合金。通过热挤压镁合金(AZ80)坯料,并在坯料和挤压模具之间放置铝合金板,成功地实现了涂层。A2024铝合金包覆的镁合金具有优异的耐蚀性,在5质量%的HCl水溶液中浸泡10 min后无失重现象,而未包覆的AZ80镁合金在相同条件下失重约1500 g·m−2。经673 k固溶处理3 h,室温时效144 h,镀层合金的表面硬度提高到85 HV左右[doi:10.2320/matertrans.M2017317]
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来源期刊
Journal of The Japan Institute of Metals
Journal of The Japan Institute of Metals 工程技术-冶金工程
CiteScore
0.70
自引率
0.00%
发文量
27
审稿时长
6-12 weeks
期刊介绍: Information not localized
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