|
Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Al-Cr系複合鋳込み遠心鋳造材のレーザ表面改質処理
| Title: | Al-Cr系複合鋳込み遠心鋳造材のレーザ表面改質処理 |
| Other Titles: | Laser Surface Modification of Al-Cr Alloy Castings Produced by Centrifugal Duplex Casting |
| Authors: | 大参, 達也1 Browse this author →KAKEN DB | | 高橋, 和久2 Browse this author | | 工藤, 昌行3 Browse this author |
| Authors(alt): | Ohmi, Tatsuya1 | | Takahashi, Kazuhisa2 | | Kudoh, Masayuki3 |
| Keywords: | laser surface modification | | remelting | | rapid solidification | | centrifugal casting | | composite material | | intermetallic compound | | aluminum alloy | | hardness | | structure control | | solidification |
| Issue Date: | 1-Nov-2001 |
| Publisher: | 日本金属学会 |
| Journal Title: | 日本金属学会誌 |
| Journal Title(alt): | Journal of the Japan Institute of Metals |
| Volume: | 65 |
| Issue: | 11 |
| Start Page: | 1038 |
| End Page: | 1044 |
| Publisher DOI: | 10.2320/jinstmet1952.65.11_1038 |
| Abstract: | Effects of surface modification by a laser remelting process on the structure and hardness of surface composite castings of hyperperitectic Al-Cr alloys have been investigated. These castings were produced by either Centrifugal Duplex Casting(CDC process) or conventional centrifugal casting. The CDC process is applicable to the production of a tubular casting with an in-situ composite layer containing fine intermetallic crystals. On the other hand, there are coarse intermetallic crystals in the composite layer of the tubular castings produced by the conventional centrifugal casting.
The intermetallic crystals in the laser-melted zone in each specimen were extremely refined regardless of their original size. However, many cracks were observed in the coarse intermetallic crystals near the melted zone on the specimen produced by the conventional centrifugal casting. On the contrary, no such defect were seen in the CDC specimens with finely dispersed intermetallic crystals. In these specimens, the hardness of the melted zone was about 50% higher than the substrate. Furthermore, addition of Cu was effective for the hardening of both of the substrate and the melted zone. |
| Relation: | https://www.jstage.jst.go.jp/article/jinstmet1952/65/11/65_11_1038/_article/-char/ja |
| Type: | article |
| URI: | http://hdl.handle.net/2115/74667 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 大参 達也
|
