摘要
通过混合Fe,Ni,C单质和粘接剂粉末配制了选择性激光烧结(SLS)用复合粉末,并利用间接SLS方法制备了复合粉末毛坯.经过脱脂、高温烧结和渗铜处理,制造了致密的渗铜Fe-Ni-C合金材料.对零件毛坯的成型与后处理工艺及合金的微观组织和机械性能进行了研究.结果表明:高温烧结中Ni和C能够通过固态扩散固溶到-γFe中,且合金元素分布均匀;合金经900℃固溶并在330℃等温处理1 h后,室温下由下贝氏体组织、沉淀析出的-αCu和Fe-Ni构成;合金材料的极限拉伸强度超过350 MPa,延伸率小于4%.
Composite powders for selective laser sintering （SIRS） process were obtained by mixing Fe, Ni, C and binder powders. Green parts of the preceding composite powders were manufactured via indirect SLS. After a series of post processes, the Cu-infiltrated Fe-Ni-C alloys were fabricated. The forming and post processes of green parts were discussed, and the microstructures and mechanical properties of the mentioned alloys were analyzed. The resu. lts showed that Ni and C diffused into γ-Fe during high temperature sintering and the alloying elements distributed uniformly. Lower bainite, precipitated α-Cu and Fe-Ni are the main microstructures of the alloys at room temperature after the alloy was treated for solution at 900 ℃ and held at 330 ℃ for 1 h. It was seen that the tensile strength of alloys exceeds 350 MPa and the elongation of them is under 4 %.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第5期83-85,共3页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
湖北省自然科学基金资助项目(2004ABC001)
中南大学粉末冶金国家重点实验室开放基金资助项目(200506123102A)
关键词
选择性激光烧结
渗铜合金
复合粉末
性能
selective laser sintering
Cu infiltrated alloy
composite powders
property
