中文摘要：

对部分扩散预合金Fe-2Cu-2Ni-1Mo-1C粉末的温压行为及烧结和热处理后的组织和性能进行了研究。结果表明：模壁润滑温压工艺能明显提高烧结材料的密度和性能；在130℃、400～700MPa压力范围内材料压坯密度、烧结密度和烧结性能均随压制压力增大而提高；700MPa下材料压坯密度7．34g／cm^3；1150℃烧结60min后密度为7．32g／cm^3，抗拉强度达到853MPa，表面硬度302 HB，伸长率4．4％；热处理对烧结材料力学性能提高效果显著；880℃淬火＋350℃回火60min材料的综合性能较好，抗拉强度1086MPa，表面硬度295HB，伸长率3．7％，显微组织为马氏体、回火屈氏体和残余奥氏体。

英文摘要：

The warm compacting behavior, mechanical properties and microstructure of sintered and heat treated of partially-diffuse alloyed Fe-2Cu-2Ni-1Mo-1C powders were studied in this paper. Results show that die wall lubricated warm compaction technology could improve the densities and mechanical properties of Fe-2Cu-2Ni-1Mo-1C materials. At 130 ℃, green density, sintered density and mechanical properties of the sintered materials increase when the compacting pressure increased from 400 MPa up to 700 MPa. Materials have a green density of 7. 34 g/cm^3, sintered density of 7. 32 g/cm^3, tensile strength of 853 MPa, apparent hardness of 302 HB and elongation of 4. 4% when formed at a compacting pressure of 700 MPa and sintered at 1 150 ℃ in hydrogen atmosphere for 60 min. Mechanical properties of heat treated Fe-2Cu-2Ni-1Mo-1C materials are enhanced obviously. The optimum mechanical properties were obtained when the materials quenched from 880 ℃ and tempered at 350 ℃ for 60 min. Materials had a tensile strength of 1 086 MPa, apparent hardness of 295 HB and elongation of 3. 7%. Martensite, temper troostite and retained austenite are observed in the microstructure.