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Vol.16, No.5, 370 ~ 377, 1978
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| Title |
| Influence of Carbon and Silicon to the SDN ( degree of normalization ) in Spheroidal Graphite Cast Iron |
| 이희철Hee C . Lee, 장치현Chee H . Chang, 한성호Seong H . Han, 박윤우Yoon W . Park, 김수영Soo Y. Kim |
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| Abstract |
| To study the properties of spheroidal graphite cast iron such as tensile strength, hardness and elongaion, the effects of Si on the properties of the alloy under the constant amount of C were investigated and vice verse. The important results obstained are as follows. 1) Under the 2.5% of silicon with the variation of amouuts of carbon, degree of normalization (SDNsi) and hardness (SHNsi) of the alloy are as follows. SDNsi=-1.95Sc+85.1/15.6Sc+30.9×100 SHNsi=-90.0Sc+287)/105 Sc+31 2) Under 3.21% of carbon with the variation of amount of silicon, SPNc and SHNc of the alloy are as follows SDNc=-68.0Sc+132.2/15.6Sc+30.9×100 SHNc=-410Sc+586/105Sc+31 3) Under 2.35% of silicon the elongation due to variation of amount of carbon is 7.5% when Sc is 1 and the elongation is 4.7% when Sc is 0.8. Therefor the large differences in the elongation between Sc equals 1 and 0.8 were not observed. However, under the constant amount of carbon, differences in the elongation due to variation of silicon are very large. |
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