Abstract
Surface peeling occurred on the lead frame Cu-Fe-P alloy after finish rolling. By means of microstructure analysis it was found that there were some larger Fe particles under the damaged surface of sheet, and some microcracks existed around the Fe particles before finish rolling. The effect of sheet thickness on the stress around Fe particles in Cu-Fe-P alloy was investigated using finite element digital analysis method. The results show that the stress concentration between the Fe particles and Cu matrix is the main factor to result in the microcracks and surface damage. The smaller the thickness of sheet, the larger the stress concentration at the interface between matrix and Fe particles, which will bring a-bout the surface peeling of lead frame Cu-Fe-P alloy.
| Original language | English |
|---|---|
| Pages (from-to) | 51-55 |
| Number of pages | 5 |
| Journal | Jinshu Rechuli/Heat Treatment of Metals |
| Volume | 30 |
| Issue number | 8 |
| State | Published - Aug 2005 |
Keywords
- Cu-Fe-P alloy
- Sheet thickness
- Stress concentration
- Surface peeling