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首页> 外文会议>ASME international mechanical engineering congress and exposition >THERMAL MODELING OF 304L STAINLESS STEEL FOR SELECTIVE LASER MELTING: LASER POWER INPUT EVALUATION
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THERMAL MODELING OF 304L STAINLESS STEEL FOR SELECTIVE LASER MELTING: LASER POWER INPUT EVALUATION

机译：选择性熔炼304L不锈钢的热模型：激光功率输入评估

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摘要

Selective Laser Melting (SLM) process is a Powder Bed Fusion (PBF) technique, which has shown significantly growth in the recent years. The demand for this process is justified by the versatility and ease in manufacturing the parts from 3D models as well for the increased complexity of engineered parts generated from topology or shape optimization. Automotive, aerospace, medical and aviation industries are taking great advantage of this process due the unique geometry characteristics found in the components. To enhance the benefits of SLM, a vital task is to analyze the laser power input impact on the temperature distribution through the powder bed, important for posterior residual stresses analysis. The Finite Element Method proposed in this study is a transient thermal model, able to predict temperature distribution through different sections of the powder bed when performing a single track of the laser scanning. Furthermore, the impact of the laser power input is carried out utilizing SS 304L, a low cost Stainless Steel alloy that can be employed in the SLM process, in order to determine the influence on the temperature distribution along the different cross sections.
机译：选择性激光熔化（SLM）工艺是粉末床融合（PBF）技术，近年来已显示出显着的增长。多功能性和从3D模型制造零件的便利性以及由于拓扑或形状优化而产生的工程零件的复杂性不断增加，证明了此过程的合理性。汽车，航空航天，医疗和航空行业都充分利用了这一过程，因为它们具有独特的几何特征。为了增强SLM的优势，一项至关重要的任务是分析激光功率输入对粉末床温度分布的影响，这对于后残余应力分析很重要。这项研究中提出的有限元方法是一个瞬态热模型，当执行单道激光扫描时，它能够预测粉末床不同部分的温度分布。此外，激光功率输入的影响是利用SS 304L（一种可以在SLM工艺中使用的低成本不锈钢合金）进行的，以确定对沿不同横截面的温度分布的影响。

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