A lean alloy is defined as a low alloy steel that minimizes the content of the alloying elements, while maintaining the characteristics of the sintered alloy. The purpose of this study is to determine the change in microstructure and mechanical properties due to the addition of silicon or tin in Fe-Mo-P, Fe-Mn-P, and Fe-Mo-Mn-P alloys. Silicon- or tin-added F-Mo-P, Fe-Mn-P, and Fe-Mo-Mn-P master alloys were compacted at 700 MPa and subsequently sintered under a H2-N2 atmosphere at 1120oC. The sintered density of three alloy systems decreases under the same compacting pressure due to dimensional expansion with increasing Si content. As the diffusion rate in the Fe- P-Mo system is higher than that in the Fe-P-Mn system, the decrease in the sintered density is the largest in the Fe-PMn system. The sintered density of Sn added alloys does not change with the increasing Sn content due to the effect of non-dimensional changes. However, the effect of Si addition on the transverse rupture strengthening enhancement is stronger than that of Sn addition in these lean alloys.

Abstract
 1. 서 론
 2. 실험 방법
 3. 실험결과 및 고찰
 4. 결 론
 References

• 정우영(경상대학교 나노·신소재 공학부) | Woo-Young Jung (School of Nano and Advanced Materials Science & Engineering)
• 옥진욱(경상대학교 나노·신소재 공학부) | Jin-Uk Ok (School of Nano and Advanced Materials Science & Engineering)
• 박동규(경상대학교 링크사업단) | Dong-Kyu Park (LINC, Gyeongsang National University)
• 안인섭(경상대학교 나노·신소재 공학부, 경상대학교 그린에너지 융합연구소) | In-Shup Ahn (School of Nano and Advanced Materials Science & Engineering, RIGET) Corresponding Author