Abstract: The Fe-Cu-C (0.8%C) material was pressed using powder metallurgy technology, and the effects of different sintering atmospheres (RX atmosphere generated from propane, and AX atmosphere generated from ammonia) and process conditions on the microstructure were investigated. The results indicated that the parts with high-carbon would be decarburized when sintered under the RX atmosphere, resulting in the surface hardness is Hv(0.1)40 lower than that of the core area, which can be compensated by adding extra mash gas. However, non-uniform compensation would lead to the formation of network cementite, negatively impacting performance. Conversely, no significant decarburization was observed on the surface when sintered under the AX atmosphere. It is necessary to add 5-10 L·H-1 mash gas to ensure the microstructure of the product and achieve the uniform hardness between surface and core.