A lean alloy is defined as a low alloy steel with a minimum amount of the alloying element that maintains the characteristics of the sintered alloy. It is well known that the addition of elements such as Cr, P, Si, or Mn improves the mechanical characteristics of the alloy, but decreases the sinterability. The mother alloy is used to avoid an oxidation reaction with the alloying elements of Cr, P, Si or Mn. The purpose of this study is to determine the change in the mechanical properties of Fe-P-Mo and Fe-P-Mn alloys as a result of the addition of Si. In this article, the Fe-P-Mo and Fe-P-Mn alloys to which Si is added are compacted at 7.0 g/cm3 and then sintered in H2-N2 at 1120℃. The P around the macropores and large grains reduces due to the formation of SiO2 as the Si content increases. This is caused by the increase in strength owing to reducing intergranular fracture by suppressing the reaction with oxygen.

Abstract
 1. 서 론
 2. 실험방법
 3. 실험결과 및 고찰
 3. 결 론
 References

• 정우영(경상대학교 나노신소재 공학부)
• 박동규(경상대학교 링크사업단) | Dong-Kyu Park (LINC, Gyeongsang National University)
• 고병현(경상대학교 나노신소재 공학부) | Byung-Hyun Ko (School of Nano and Advanced Materials Science & Engineering)
• 박진우(경상대학교 나노신소재 공학부) | Jin-Woo Park (School of Nano and Advanced Materials Science & Engineering)
• 안인섭(경상대학교 나노신소재 공학부, 경상대학교 그린에너지 융합연구소) | In-Shup Ahn (School of Nano and Advanced Materials Science & Engineering, RIGET) Corresponding Author