The long production time required for large-scale parts fabricated by laser powder bed fusion (LPBF) tends to induce cracks, distortions, and overheating problems. In this work, to address these challenges, we explored and established a suitable strategy for producing large AlSi10Mg components. The platform temperatures to prevent cracks and distortions were firstly determined. Then, the in situ aging behavior was investigated for samples under various platform temperatures and holding times. Our results revealed that platform temperatures of 150°C and 200°C can effectively prevent cracks and minimize distortions. Besides, using 150°C, samples can reach peak hardness with a holding time less than 13 h. In comparison, those samples produced with a holding time longer than 13 h at 150°C and 200°C show obvious over-aging responses and thus lower hardness. However, such a hardness impoverishment can be recovered by using a T6 post-process heat-treatment.

通过激光粉末床熔合（LPBF）制造的大型零件所需的较长生产时间往往会引起裂纹，变形和过热问题。在这项工作中，为了应对这些挑战，我们探索并建立了生产大型AlSi10Mg组件的合适策略。首先确定防止裂缝和变形的平台温度。然后，研究了样品在各种平台温度和保持时间下的原位老化行为。我们的结果表明，平台温度在150°C和200°C可以有效防止裂纹并最大程度地减少变形。此外，在150°C的温度下，样品的保持时间不到13小时即可达到峰值硬度。相比下，在150°C和200°C下保持时间超过13小时的样品显示出明显的过时效，因此硬度较低。但是，可以通过使用T6后处理热处理来恢复这种硬度降低。