論文

2000年4月

Microstructure, microhardness, composition, and corrosive properties of stainless steel 304 - I. Laser surface alloying with silicon by beam-oscillating method

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
  • Y Isshiki
  • ,
  • J Shi
  • ,
  • H Nakai
  • ,
  • M Hashimoto

70
4
開始ページ
395
終了ページ
402
記述言語
英語
掲載種別
研究論文(学術雑誌)
出版者・発行元
SPRINGER VERLAG

Laser surface alloying (LSA) with silicon was conducted on austenitic stainless steel 304, Silicon slurry composed of silicon particle of 5 mu m in average diameter was made and a uniform layer was supplied on the substrate stainless steel. The surface was melted with beam-oscillated carbon dioxide laser and then LSA lavers of 0.4-1.2 mm in thickness were obtained. When an impinged energy density was adjusted to be equal to or lower than 100 W mm(-2) LSA layers retained rapidly solidified microstructure with dispersed cracks. In these samples, Fe3Si was detected and the concentration of Si in LSA layer was estimated to be 10.5 wt. % maximum. When the energy density was equal to or greater than 147 W mm(-2), cellular grained structure with no crack was formed. No iron silicate was observed and alpha iron content in LSA layers increased, Si concentration within LSA layers was estimated to be 5 to 9 wt. % on average. Crack-free as-deposited samples exhibited no distinct corrosion resistance, The segregation of Si was confirmed along the grain boundaries and inside the grains. The microstructure of these samples changed with solution-annealing and the corrosion resistance was fairly improved with the time period of solution-annealing.

Web of Science ® 被引用回数 : 9

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Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000086648400006&DestApp=WOS_CPL

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