Sn-P 첨가가 박육 구상 흑연주철의 미세구조와 기계적 성질에 미치는 영향 = Effect of Sn-P addition on microstructure and mechanical properties of thin ductile cast iron

다국어 초록 (Multilingual Abstract)

In this study, as the necessity of thin section and high strength of Spheroidal Graphite Cast iron increase, the effect of Oscillation and Sn-P addition on Microstructure and Mechanical properties of Spheroidal Graphite Cast iron was investigated.
As a result, by decreasing casting thickness, the size of speroidal graphite grew smaller, on the contrary, the number of speroidal graphite increased in case of Oscillation and Sn-P added, also shape of graphites were K type in case Oscillation but contrarily L type in case non Oscillation.
The tensile strength and hardness of Spheroidal Graphite Cast iron increased with the amount of Sn-P untill its contents reaches to 0.2%, however it decreases when the amount of P exceeds 0.2%.
Therefore, as a result of thin section of casting, the mechanical properties of Spheroidal Graphite Cast iron will be improved, Oscillation and added 0.2%Sn-0.2%P will take effect on high strength of casting.

목차 (Table of Contents)

• Ⅰ. 서론
• Ⅱ. 실험방법
• 2.1 용해
• 2.2 시편제작
• 2.3 현미경조직
• 2.4 기계적시험
• Ⅲ. 실험결과 및 고찰
• 3.1 흑연조직
• 3.2 기지조직
• 3.3 경도
• 3.4 인장강도
• 3.5 연신율
• Ⅳ. 결론