Laser sintering and lamination characteristics of Fe-Cu atomized powders

Katsuhiro Maekawa, Terutake Hayashi, Yasuo Sato, Kazumi Minagawa, Hideki Kakisawa

Research output: Contribution to journalArticlepeer-review

Abstract

Sintering and lamination characteristics of Fe-Cu atomized powder have been investigated to meet requirements on recycling of automobiles and manufacture of lightweight structure. The greentape laser sintering method using Nd:YAG pulse laser and powder tape called "greentape" is employed for the fabrication of Fe-Cu porous structure. Extensively investigated is influence of laser parameters, such as voltage, pulse width and average power upon the state of liquid sintering or both surface texture and tensile strength of the sintered specimens. A water-atomized Fe-5mass%Cu powder (3-8/μm in diameter) is superior to the gas-atomized Fe-2mass%Cu one (5-38/μm) in monolayer strength, but being difficult to laminate due to the existence of massive pores. It is successful to laminate 16 layers of gas-atomized greentape (190μm in thickness each) at a voltage of 198 V, a pulse width of 2.0 ms and an average power of 13 W. Porous structure can be controlled by changing these laser parameters, whereas it is necessary to resolve distortion of the sintered part by means of a segmented laser irradiation.

Original languageEnglish
Pages (from-to)749-755
Number of pages7
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume51
Issue number10
DOIs
Publication statusPublished - Oct 2004
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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