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。
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.
出处
《机械工程材料》
CAS
CSCD
北大核心
2007年第9期30-33,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(50574041)
广东省自然科学基金重点资助项目(06105411)
广东省及广州市科技计划资助项目(2004B10301018
2006Z1-D6081)
教育部新世纪优秀人才资助项目(NCET-05-0739)
关键词
模壁润滑温压
部分扩散预合金
粉末冶金
die wall lubricated warm compaction
partially-diffuse alloyed
powder mtallurgy
