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针对数字化医学中个性化种植体基台的设计要求,提出了将数控加工和增材制造技术相结合,拼接制造个性化种植体基台的方法。根据拼接成型的特点,对传统选区激光熔化(Selective Laser Melting,SLM)成型基板进行改造,重新确定基体、SLM基板和成型零件之间的空间关系。通过工艺参数实验,成型表面的裂纹、粉末的球化以及剖面的裂纹孔隙等现象明显减少。利用优化的工艺参数对拼接区域的维氏硬度、拼接零件的拉伸性能进行研究。SLM拼接区域自成型顶面向下维氏硬度逐渐降低;拼接件的极限拉伸强度和伸长率要优于完全SLM制造的试件,试件经过热处理塑性得到了较大提高。
In order to meet the design requirements of personalized implant abutments in digital medicine, a method of combining NC machining with additive manufacturing technology and splicing to manufacture personalized implant abutments was proposed. According to the characteristics of stitching, the traditional Selective Laser Melting (SLM) molding substrate is modified to redefine the spatial relationship between the substrate, the SLM substrate and the molded part. Through the process parameters experiment, the molding surface cracks, the powder of the ball and the crack in the profile of the pore and other phenomena significantly reduced. The Vickers hardness and the tensile properties of the spliced parts were studied by using the optimized process parameters. The Vickers hardness of SLM spliced area decreases gradually from the top of molding surface to that of spliced steel. The ultimate tensile strength and elongation of spliced parts are better than that of pure SLM. The plasticity of the specimens after heat treatment is greatly improved.