木粉/PES复合粉末选择性激光烧结成形及后处理技术研究  

Selective Laser Sintering Prototyping and Post Processing Techniques for Wood-flour/PES Composites

作　　者：郭艳玲[1] 姜凯译[1] 辛宗生[1] 曾伟梁[1] 

机构地区：[1]东北林业大学机电工程学院,黑龙江哈尔滨150040

出　　处：《电加工与模具》2011年第6期29-32,共4页Electromachining & Mould

基　　金：国家自然科学基金资助项目(51075067);黑龙江省科技攻关资助项目(GC07A510)

摘　　要：提出了一种可用于选择性激光烧结加工、成本低、无污染、可循环利用的木粉/PES粉末。使用该材料进行烧结加工得到的成形件,成形精度高,机械性能良好。开发了成形件的后处理工艺,以增加其强度、降低孔隙率。对木粉/PES粉末激光烧结及渗蜡处理的基本理论进行分析,通过实验对比、扫描电镜微观观察得出:经过渗蜡处理后的成形件,拉伸强度达到1.214 MPa,提高87倍;弯曲强度达到2.73 MPa,提高5.7倍;冲击强度达到1.412 kJ/m2,提高2.5倍。成形件表面密实,孔隙率为7%左右,比未经后处理的成形件有明显提高。This paper successfully developed a new kind of materials can be used in selective laser sintering （SLS）. It＇s most important advantage is low-cost, also green biological and recycled. With optimal design of components, the parts made by Wood-PES composites （WPC） have high forming accuracy and good mechanical properties. The post processing technology of prototyping part was developed for enhancing the strength and reducing the void fraction, this paper analyzed the theories of the WPC selective laser sintering and the wax infiltrated, through experimental comparison and using SEM to do microcosmic study, and got that the tensile strength is 1. 214 MPa, raised 87 times; the bending strength is 2.73 MPa, raised 5.7 times; the impact strength go to 1. 412 kJ/m2, and is raised 2.5 times, the surface of the part is close-grained, the void fraction is about 7 %, it＇s much better than the part without post processing.

关 键 词：选择性激光烧结 木粉/PES粉末 材料设计 后处理 渗蜡 

分 类 号：TG66[金属学及工艺—金属切削加工及机床]