Prototyping of Co–Cr–Mo Alloy Flat Spiral Spring by Electron Beam Melting
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- KOIZUMI Yuichiro
- Institute for Materials Research, Tohoku University,
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- SUN Shi-Hai
- Institute for Materials Research, Tohoku University,
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- SAITO Tsuyoshi
- Institute for Materials Research, Tohoku University,
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- KUROSU Shingo
- Institute for Materials Research, Tohoku University,
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- CHIBA Akihiko
- Institute for Materials Research, Tohoku University,
Bibliographic Information
- Other Title
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- 電子ビーム積層造形によるCo–Cr–Mo 合金製ゼンマイばねの試作
- デンシ ビーム セキソウ ゾウケイ ニ ヨル Co-Cr-Mo ゴウキンセイ ゼンマイバネ ノ シサク
- Prototyping of Co-Cr-Mo alloy flat spiral spring by electron beam
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Abstract
Flat spiral spring (i.e. coils of metal ribbon such as clock-mainsprings) can store elastic strain energy and release the energy as kinetic energy on demand. Recently, devices to generate electricity from the elastic strain energy are attracting attention as energy saving tools and emergency power source. However, a higher energy density and downsizing are necessary for practical use. In the present study, the electron beam melting (EBM) has been applied to Co–Cr–Mo alloy, which has a potential ability to store approximately 30 % higher elastic strain energy than the currently best material, in order to maximize its Young’s modulus by controlling the crystal orientation texture. A high Young’s modulus of 275 GPa and a high strength of 1.2 GPa have been achieved with a rod by selecting its longitudinal axis parallel to the space diagonal of the space defined by the x– and y– scanning direction of electron beam and the z–build direction. The mechanical property of the rod is very attractive for a high energy-density clock-mainspring material. Moreover, the single-pieced fabrication of a spring-shaft-balance disk unit was tested, and the surface-smoothing and the control of local crystal texture during the EBM process have been emerged as necessary challenges.
Journal
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- Journal of the Japan Society of Powder and Powder Metallurgy
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Journal of the Japan Society of Powder and Powder Metallurgy 61 (5), 243-249, 2014
Japan Society of Powder and Powder Metallurgy
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Details 詳細情報について
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- CRID
- 1390001206310875392
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- NII Article ID
- 130004678664
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- NII Book ID
- AN00222724
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- COI
- 1:CAS:528:DC%2BC2cXhtlKnu7nE
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- ISSN
- 18809014
- 05328799
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- NDL BIB ID
- 025486464
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed