工程科学学报2017，Vol.39Issue(2)：232-237,6.DOI:10.13374/j.issn2095-9389.2017.02.010
铁粉表面硫化处理制备高密度Fe-Cu-C合金
Sulfurizing treatments on the surface of iron powder for preparing high density Fe-Cu-C alloys
摘要
Abstract
Breaking through the conventional P/M processing, a new process for preparing high density Fe-Cu-C alloys was de-signed. Through sulfuring treatments on the surface of iron powder, Fe reacts with moderate S to generate FeS, which is uniformly coa-ted on the surface of iron powder particles and formed a thin-layered FeS lubrication film. The FeS lubrication film is useful for reduc-ing the friction of compaction. The phase, element distribution and microstructure were characterized by X-ray diffraction, scanning electron microscopy and field emission scanning electron microscopy. The results show that the FeS lubrication film coating on the sur-face of iron powder is significant to improve the green density and activate sintering. After sulfuring treatments, Fe-2Cu-0. 8C alloys with 0. 5% S exhibit higher mechanical properties:the green density reaches 7. 31 g·cm-3 , the hardness 78. 6 HRB, and the tensile strength 485 MPa. When the mass fraction of S is 0. 8%, redundant FeS accounts for pressing volume fraction, resulting in the decrea-sing of green density and mechanical properties.关键词
硫化处理/硫化亚铁/高密度/铁铜碳合金/润滑膜/活化烧结Key words
sulfuring treatment/ferrous sulfid/high density/iron copper carbon alloys/lubrication film/activated sintering分类
矿业与冶金引用本文复制引用
杨芳,隋延力,郭志猛,李普明,袁勇,李平..铁粉表面硫化处理制备高密度Fe-Cu-C合金[J].工程科学学报,2017,39(2):232-237,6.基金项目
国家高技术研究发展计划资助项目(2013AA031104) （2013AA031104）
