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題名 | 高溫流體床製程被覆碳化釩之研究=A Study on High Temperature TRD VC Coating Processed in a Fluidized Bed |
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作者 | 陳繁雄; 李丕耀; 葉銘琪; | 書刊名 | 材料科學 |
卷期 | 30:1 1998.03[民87.03] |
頁次 | 頁1-12 |
分類號 | 472.3 |
關鍵詞 | 熱反應沉積擴散製程; 流體床; 碳化釩; Thermal reactive deposition and diffusion process; Fluidized bed; Vanadium carbide; |
語文 | 中文(Chinese) |
中文摘要 | 近年來,各國均積極投入研究鋼的表面改質制程,以增加工具使用壽命。新的製 程著重於提高工具(例如模具、機械零件)表面之耐磨耗、耐疲勞、耐腐蝕及耐氧化性。壓 鑄模(Die Casting Mold),鍛粗模(Upsetting Die)及抽引模(Drawing Die)等傳統之表面 處理,主要使用軟滲氮、PVD及CVD為主,然而,最近由新井博士發展之豐田擴散法(TD process)被認為是最有效之處理方法,唯該法採用熔融之硼砂浴,處理後之工作物清洗不易, 且作業環境不佳為其主要缺點,此可藉最近開發之流體床熱反應沉積擴散製程(Thermal Reactive Deposition and Diffusion, TRD)予以改善之。 本研究採用流體床法,以JIS SKD11、SKD61、SKH51等工具鋼為試片材料,使用釩 鐵粉末作為碳化物形成元素,在900-1000℃之處理溫度,於試件表面生成釩碳化物之被覆 層,研究影響被覆厚度、硬度之各種參數,如溫度、時間及V-Fe粉末等,藉以找出最佳化 之條件。 |
英文摘要 | Recent years, the steel surface modification process has been extensively studied for enhancing the tool life. The nitrocarburizing, PVD and CVD have been conventionally employed on treating the die casting mold, upsetting die and drawing die etc. However, the Toyota Diffusion process (TD process) recently developed by Dr. Arai was considered the most effective process among them. The TD process is accomplished in a borax bath which inevitably makes the borax salt stuck on the workpieces and difficult to clear up. This has forced the industry to apply cleaner medium and technology for such TRD (Thermal Reactive Deposition and Diffusion) processing by using the fluidized bed furnace. This research was conducted in a fluidized bed furnace to study the formation of vanadium carbide on three kinds of tool steels (JIS SKD11, SKH51 and SKD61) at 900-1000℃. The prealloyed V-Fe powder was used as carbide forming element (CFE). The experimental parameters such as temperature, time and amount of V-Fe powder addition were investigated to determine their effects on the thickness and hardness of the carbide layer. The optimal condition of the process was also established. |
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