金属微型元器件的制备与性能检测  

Manufacturing technology and performance testing of metallic micro-sized components

作　　者：尹海清[1] 杜美娜[1] 曲选辉[1] 何新波[1] 贾成厂[1] 

机构地区：[1]北京科技大学材料科学与工程学院粉末冶金研究所,北京100083

出　　处：《北京科技大学学报》2008年第12期1428-1431,共4页Journal of University of Science and Technology Beijing

基　　金：国家高技术研究发展计划资助项目(No.2006AA03Z557);国家重点基础研究发展计划资助项目(No.2004CB719802);国家自然科学基金资助项目(No.50634010)

摘　　要：研究了粉末微注射成形技术制备纯铁微型齿轮.采用平均粒度为2.3μm的羰基铁粉和石蜡基热塑性粘结剂体系,当粉末的装载量(体积分数)为58%时,获得了形状良好的齿顶圆直径为700μm的微型齿轮注射生坯.烧结后齿形轮廓清晰,中心孔的圆度保持良好,齿轮的齿顶圆的收缩率约为15.6%,齿轮表面的粗糙度为Sa=5.0991μm.Micro powder injection molding （μ-PIM） was studied to manufacture micro-sized gearwheels of iron. Carbonyl Fe powder with a mean size of 2.3 μm and wax-based thermoplastic binder mixture were used in the manufacture process. When the powder loading was fixed as 58 %, the molded compact of a gearwheel whose addendum circle diameter is 700 μm was obtained with well shape retention. The profile of the gearwheel and the roundness of the centre hole were kept well after sintering. The sintering shrinkage of the addendum circle is 15.6 % and the roughness of the gearwheel surface is Sa = 5. 099 μm.

关 键 词：微型齿轮 微注射成形 齿顶圆 表面粗糙度 

分 类 号：TF124[冶金工程—粉末冶金]