| Title |
Effect of the Cu Composition Ratio on the Phase Transformation in Low Ni Austenite Cast Iron, Fe-3%C-16%(Ni+Mn+Cu) |
| Authors |
박기덕(Gi Deok Park); 허회준(Hoe Jun Heo); 나혜성(He Sung Na); 강정윤(Chung Yun Kang) |
| DOI |
https://doi.org/10.3365/KJMM.2012.50.6.419 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
austenitic cast-iron; casting; microstructure; scanning electron microscopy; electron probe microanalyzer |
| Abstract |
The purpose of this research was to develop a low Ni austenitic cast iron through replacing Ni by Cu and Mn because they are cheaper than Ni. The effect of the Cu content (6-12 wt%) on the microstructure characteristics was investigated in Fe-3%C-16%(Ni+Cu+Mn) cast iron. Contrary to general effect of the Cu on cast iron, the result of the microstructure analysis indicated that bainite and cementite were formed in high Cu content (>8 wt%Cu). A crystallized Cu-solution (Cu-Mn) phase and MnS in the Cu-solution were formed. The quantity of those phases increased as the Cu content increased. Consequently, the high Cu content in the composition ratio (Ni+Cu+Mn=16%) caused the formation of Cu-Mn/MnS and those phases decreased the effect of Cu and Mn on austenite formation. For this reason, bainite and cementite were formed in high Cu content. |