This study aims to optimize the uniformity of the temperature field during sintering to improve part performance. A temperature-field monitoring system is established based on an infrared thermal imager and the temperature field data obtained during the sintering of a part can be measured in real time. The relationship among the sintering temperature field, sintering process parameters, and part performance is established experimentally. Subsequently, a temperature field monitoring and analysis system is constructed, and various sintering temperature-field control strategies are established for various part sizes. Finally, a dynamic control strategy for controlling the temperature field during sintering is proposed, experimentally validated, and fully integrated into a developed powder bed fusion (PBF) equipment. For eight-shaped standard parts, the range of sintering temperature field is optimized from 44.1 °C to 19.7 °C, whereas the tensile strength of the parts increased by 15.4%. For large-size H parts, localized over burning is eliminated and the final quality of the part is optimized. This strategy is critical for the optimization of the PBF process for large-sized parts, in particular in the large-sized die manufacturing industry, which offers promise in the optimization of part performance.

中文翻译：

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通过监测动态温度场实时控制粉末床熔合

这项研究旨在优化烧结过程中温度场的均匀性，以改善零件性能。基于红外热像仪建立了温度场监测系统，可以实时测量零件烧结过程中获得的温度场数据。实验建立了烧结温度场，烧结工艺参数和零件性能之间的关系。随后，构建了温度场监测和分析系统，并针对各种零件尺寸建立了各种烧结温度场控制策略。最后，提出了一种用于控制烧结过程中温度场的动态控制策略，并进行了实验验证，并将其完全集成到已开发的粉末床熔化（PBF）设备中。对于八形标准件，烧结温度场的范围从44.1°C优化到19.7°C，而零件的拉伸强度提高了15.4％。对于大型H零件，消除了局部过度燃烧，并优化了零件的最终质量。该策略对于优化大型零件的PBF工艺至关重要，特别是在大型模具制造行业中，这为优化零件性能提供了希望。