SLM成型医用钴铬合金的表面粗糙度与致密度研究

发布时间：2018-05-20 09:49

本文选题：SLM + 表面粗糙度　；参考：《应用激光》2014年06期

【摘要】：采用选区激光熔化进行钴铬合金成型,是当今牙齿种植体制造的新方法,然而SLM成型试样表面粗糙度的累积效应对于制件的性能具有重要影响。实验首先获得了适于多道成型的单熔道以及相应的工艺参数,在此基础上进行正交实验,研究激光线能量密度(E)、粉末粒度、粉层厚度以及层间扫描策略对于多层成型制件表面粗糙度及致密度的影响规律并进行原因分析。实验结果表明P/V1.6时,多层成型试样的成形质量明显改善;粉末层厚是影响多层制件成型质量的最主要因素,在一定范围内线能量密度越大、小颗粒粉末比重越大、粉层厚度越小可以有效降低表面粗糙度和提高致密度;采用层错正交叠加的策略有助于熔池的浸润和铺展从而降低表面粗糙度。
[Abstract]:Co-Cr alloy molding by selective laser melting is a new method for manufacturing dental implants. However, the cumulative effect of surface roughness of SLM molded samples has an important effect on the properties of the parts. At first, the single melting channel suitable for multi-pass molding and the corresponding technological parameters were obtained. On the basis of the orthogonal experiment, the laser linear energy density and particle size of the powder were studied. The influence of powder thickness and interlayer scanning strategy on the surface roughness and density of multilayer forming parts were analyzed. The experimental results show that the forming quality of multilayer sample is improved obviously when P/V1.6 is used, and the thickness of powder layer is the most important factor affecting the forming quality of multilayer parts. The larger the linear energy density is, the greater the specific gravity of small particles is in a certain range. The smaller the thickness of powder layer is, the lower the surface roughness is and the higher the density is, and the more perpendicular stacking is used, it is helpful to the infiltration and spreading of the molten pool and thus to the decrease of the surface roughness.
【作者单位】：北京工业大学激光工程研究院;
【基金】：14科研基地建设-科技创新平台-面向医疗服务的3D打印关键技术与应用(市级)资助项目(项目编号:101000546614008)
【分类号】：TG146.16;R783.1

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