【摘要】：基于有限體積法,運用流體體積法(VOF)追蹤自由液面,同時考慮流動、傳熱和基底熔化的耦合,對在1Cr13不銹鋼和H70黃銅基底上等離子噴涂鉬層片的形成過程進行了三維瞬態(tài)模擬;通過等離子噴涂試驗制備了鉬層片,利用掃描電子顯微鏡和臺階儀分別測試了鉬層片的形貌和表面輪廓曲線,并將試驗結果與模擬結果進行了對比驗證。結果表明:在兩種基底上模擬得到的鉬層片形貌、厚度、鋪展系數(shù)以及基底撞擊凹坑深度都與試驗結果吻合較好;1Cr13不銹鋼基底上鉬層片發(fā)生飛濺是由于鉬熔滴在鋪展過程中受到已凝固薄層的阻礙而抬離基底,進而脫離已凝固層而形成的。
[Abstract]:Based on the finite volume method (FVM), the fluid volume method (VOF) is used to trace the free liquid surface, taking into account the coupling of flow, heat transfer and substrate melting. The formation process of plasma sprayed molybdenum laminate on 1Cr13 stainless steel and H70 brass substrate was simulated by three-dimensional transient method. Molybdenum laminate was prepared by plasma spraying test. The morphology and surface profile curve of molybdenum laminate were measured by scanning electron microscope (SEM) and step instrument, and the experimental results were compared with the simulated results. The results show that the morphology, thickness, spreading coefficient and impact pit depth of molybdenum laminate simulated on two kinds of substrates are in good agreement with the experimental results. The spatter of molybdenum lamellae on 1Cr13 stainless steel substrate is caused by Mo melt droplets being obstructed by solidified thin layer in spreading process, which is carried away from the substrate and then separated from the solidified layer.
【作者單位】： 福州大學材料科學與工程學院;
【分類號】：TG174.44

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