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Chemical composition of Fe-C and Fe-C-Nb with different percentages of Nb addition.
| Composition | Elements | ||||
|---|---|---|---|---|---|
| Points | Carbon, C (%) |
Iron, Fe (%) |
Oxygen, O (%) |
Niobium, Nb (%) |
|
| Fe-C | 1st | 72.89 | 9.13 | 17.78 | - |
| 2nd | 46.10 | 53.78 | - | - | |
| Fe-C-Nb: 2% addition | 1st | 71.56 | - | 20.30 | 8.14 |
| 2nd | 53.28 | 12.46 | 15.72 | 18.53 | |
| Fe-C-Nb: 4% addition | 1st | 43.44 | - | 11.75 | 44.81 |
| 2nd | 72.50 | - | 16.25 | 44.81 | |
| Fe-C-Nb: 6% addition | 1st | 28.76 | 70.93 | - | 0.32 |
| 2nd | 14.05 | - | - | 85.95 | |
