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 language | English |
|---|---|
| Pages (from-to) | 749-755 |
| Number of pages | 7 |
| Journal | Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy |
| Volume | 51 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 2004 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Mechanical Engineering
- Industrial and Manufacturing Engineering
- Metals and Alloys
- Materials Chemistry