Infiltration is a popular technique used to produce valve seat rings and guides to create dense parts. In order to develop valve seat material with a good thermal conductivity and thermal expansion coefficient, Cu-infiltrated properties of sintered Fe-Co-M(M=Mo,Cr) alloy systems are studied. It is shown that the copper network that forms inside the steel alloy skeleton during infiltration enhances the thermal conductivity and thermal expansion coefficient of the steel alloy composite. The hard phase of the CoMoCr and the network precipitated FeCrC phase are distributed homogeneously as the infiltrated Cu phase increases. The increase in hardness of the alloy composite due to the increase of the Co, Ni, Cr, and Cu contents in Fe matrix by the infiltrated Cu amount increases. Using infiltration, the thermal conductivity and thermal expansion coefficient were increased to 29.5 W/mK and 15.9 um/moC, respectively, for tempered alloy composite.

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

• 안인섭(경상대학교 나노·신소재 공학부) | In-Shup Ahn (School of Nano and Advanced Materials Science & Engineering, Gyeongsang National University) Corresponding Author
• 박동규(경상대학교 링크사업단) | Dong-Kyu Park (LINC, Gyeongsang National University)
• 안광복(㈜ 지케이에스) | Kwang-Bok Ahn (GKS Co. Ltd.)
• 신승목(㈜ 지케이에스) | Seoung-Mok Shin (GKS Co. Ltd.)