Seung-Hoon Lee , Ji-Hoe Koo , Omer Cakmak , Jung-Wook Cho
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引用次数: 0
摘要
本研究采用激光粉末床熔融（L-PBF）技术在 316L 钢基底上沉积钨（W），以优化工艺参数并分析 W 与 316L 之间的界面。为获得高密度的钨结构（98.89%），最佳激光功率为 350 W，扫描速度为 500 mm/s，但这些参数会导致 W-316L 界面中的钨被大量稀释；结果，尽管 L-PBF 是一种非平衡凝固过程，但仍形成了 Fe7W6 金属间化合物。这些金属间化合物很脆，会降低连接强度。通过将激光功率降至 250 W 以下，可减轻 W 的稀释，并有可能最大限度地减少金属间化合物的形成，提高先进制造应用中的接合稳定性。
Effect of laser power during laser powder bed fusion on microstructure of joining interface between Tungsten and AISI 316L steel
This study investigates the deposition of tungsten (W) onto a 316L steel substrate by laser powder bed fusion (L-PBF), to optimize process parameters and analyze the interface between W and 316L. To obtain high-density W structure (98.89%), the optimal laser power was 350 W, and scan speed was 500 mm/s, but these parameters cause significant dilution of W in the W-316L interface; as a result, Fe7W6 intermetallics form, despite L-PBF being a non-equilibrium solidification process. These intermetallics which are brittle could degrade joint strength. By reducing laser power below 250 W, the dilution of W can be mitigated, and potentially minimize formation of intermetallics and increase joint stability for advanced manufacturing applications.
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