| Summary: | 碩士 === 國立成功大學 === 機械工程學系 === 104 === This study focuses on selective laser melting (SLM) process, the melting zone of the powder and heat affected zone of the substrate influence the quality of 3D printing objects. In the present study, the controlling factors of SLM process are the laser power, laser scanning velocity, and thickness of powder bed. Because the technology of SLM is developing, the finite element model of SLM process is necessary to forecast the results. In order to check the accuracy of the simulational model, the experiment with same conditions is used to contrast two results. In this case, the material of powder is SKD61, and the substrate is S45C. After SLM printing, the depth, width, and length of melting zone, and heat affected zone of the substrate are measured to realize the influence of laser controlling parameters. Meanwhile, discussing the tendency for different combinations of laser parameters.
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