Surface treatments of Al-Si alloy castings by CO2 laser melting.
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- SHIGEMATSU Ichinori
- National Industrial Research Institute of Nagoya
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- NAKAMURA Mamoru
- National Industrial Research Institute of Nagoya
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- MACHIDA Michihide
- National Industrial Research Institute of Nagoya
Bibliographic Information
- Other Title
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- CO2レーザ溶解によるAl‐Si合金鋳造材の表面改質
- CO2レーザ溶解によるAl-Si合金鋳造材の表面改質
- CO2 レーザ ヨウカイ ニヨル Al Si ゴウキン チュウゾウザイ ノ ヒ
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Abstract
Laser surface treatments of Al–Si casting alloys were carried out by CO2 laser. Laser surface melting was attempted to obtain surface layers with micro-crystalline structure. And further, laser surface alloying was carried out using silicon powder and cobalt base self-fluxing alloy powder as sources of alloying elements. JIS AC3A aluminum alloy and hypereutectic Al–24%Si alloy were used in this experiments. Multi-mode continuous wave beam was adopted. Laser irradiation was carried out in argon atmosphere in order to avoiding oxidation of specimens. With a beam scanning apparatus, an area in 8 mm width was irradiated. After the laser treatments, the large primary Si crystals of as-received materials are transformed to fine particles and dispersed uniformly in surface layer because of rapid solidification after melting. In the case of laser surface alloying using silicon powder, the porous alloyed layers consisting of needle primary Si crystals are formed. While, by cobalt base self-fluxing alloy powder, the alloyed layer develops a dense structure except some blow holes formed by some gas contained in the alloy powder or Al–Si alloy specimens.
Journal
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- Journal of Japan Institute of Light Metals
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Journal of Japan Institute of Light Metals 47 (5), 292-297, 1997
The Japan Institute of Light Metals
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Details 詳細情報について
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- CRID
- 1390001206335155200
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- NII Article ID
- 10003795478
- 10004011956
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- NII Book ID
- AN00069773
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- COI
- 1:CAS:528:DyaK2sXjvFKku7k%3D
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- ISSN
- 18808018
- 04515994
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- NDL BIB ID
- 4217036
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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