Clarification of the Necessary Value of Surface Roughness for Developing Luster on an AZ31 Magnesium Alloy Surface with or without Acid Aqueous Solution Treatment
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- Ohara Miyoshi
- Research and Development Department, Kasatani Co., Ltd.
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- Okahara Haruo
- Research and Development Department, Kasatani Co., Ltd.
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- Takigawa Yorinobu
- Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
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- Higashi Kenji
- Department of Materials Science, Graduate School of Engineering, Osaka Prefecture University
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To shorten the press forming and surface treatment process for AZ31 magnesium alloy by eliminating the need for mechanical polishing of the press-formed surface, we determined the necessary value of surface roughness, Ra, for developing a luster on surface with or without acid aqueous solution treatment. The target value for the gloss of AZ31 magnesium alloys was set to be that of the surface after mechanical polishing by using emery paper #2000. To achieve this gloss solely by mechanical polishing without acid aqueous solution treatment, the surface roughness, Ra, had to be less than 0.2 μm. If the acid aqueous solution treatment was applied to the mechanically polished surface, the necessary surface roughness, Ra, before the treatment was 1.5 μm. The increase in gloss as a result of acid aqueous solution treatment results from smoothing of small surface convexo-concave features measuring less than 0.2 μm. Because the surface roughness, Ra, of articles press-formed by using 100,000 times square-cup drawings was 0.3 μm, the mechanical polishing stage could be eliminated from the process for developing a luster, and the acid aqueous solution treatment could be applied directly.
収録刊行物
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- MATERIALS TRANSACTIONS
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MATERIALS TRANSACTIONS 49 (5), 909-912, 2008
公益社団法人 日本金属学会
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詳細情報 詳細情報について
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- CRID
- 1390282679226422912
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- NII論文ID
- 10021146249
- 130004453973
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- NII書誌ID
- AA1151294X
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- ISSN
- 13475320
- 13459678
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- NDL書誌ID
- 9480139
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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