| 摘要: | 金屬熔射技術發展己有數十年之久，過去熔射技術應用於金屬表面改質與腐蝕防治，尤其是鋼鐵材的長期防蝕。 隨著熔射材料與熔射技術的進步，熔射技術轉變成一種可多方面應用的技術。熔射技術目前應用的範圍包括防蝕、耐磨、耐磨耗、耐沖蝕、耐高溫氧化、耐熱震、耐刮、導電、導熱、電阻層、阻熱層、裝飾、止滑、快速製模、快速原型、模仁增厚、EMI/RFI遮敝、機件修補及粉末製造等。本計畫擬以金屬熔射製程製備一系列鈦基合金塗層，並探究製程參數、塗層性質相關於塗層耐磨性能、耐蝕性能及磨潤機制的研究，計畫擬分為三年期程進行。第一年以鈦-鎳及鈦-鋁等鈦基電弧仿合金複合塗層為主軸；第二年結合機械冶金與噴霧乾燥法製備鈦基介金屬粉末，再分別以火焰粉末熔射及高速燃氣熔射法製備鈦基介金屬複合塗層為主軸；第三年則以氮化後處理對鈦基塗層之性質影響為主軸。各種鈦基熔射塗層的性質、微結構及熱處理後對塗層性質的影響(如相轉移、層間擴散、微組織變化等)，將藉由表面粗度儀、微硬度計、電子顯微鏡及電子探微儀給予測定。耐磨性能及磨潤機制的檢測及探究，將透過乾摩擦及潤滑摩擦等磨潤實驗予以評估。本計畫中有關熔射塗層的製備、摩擦測試及實驗分析，均將採用實驗設計法進行。該方法除有助於掌握實驗的進行，更可提供吾人對塗層特徵及實驗結果(如塗層硬度、表面組織及組成、摩擦係數、溫度增量、磨耗軌跡微觀型態、與碎片特徵等)，彼此間關係及數學模式之分析與建立。本計畫第一年已獲國科會支持(國科會計畫編號：NSC96-2221-E-008-076, 96/8/1~97/7/31)，本次申請第二年(97/8/1~98/7/31)及第三年(98/8/1~99/7/31) 之經費補助， 亦即申請補助經費表之第一年(97/8/1~98/7/31) 與第二年 (98/8/1~99/7/31)。 ; Thermal spraying is a well-developed technology during the passing decades. It’s quite suitable for both surface refinement and corrosion resistant of metals, especially provided long-term protection of iron and steel structures. Because of the rapid development in feedstock materials and spraying methods, it has turned thermal spraying into a multi-purpose technology. The utilization of thermal spraying is broaden day by day, the application field include corrosion resistant, wear resistant, erosion resistant, anti-slide, decoration, rapid tooling, EMI/RFI shielding, element reclamation and powder manufacture etc. In this program, a lot of thermal spraying methods will be adopt to produce a series of Ti-based pseudo coatings and Ti-base intermetallic coatings which the wear resistance and tribological mechanism that related to the spraying parameters and coatings properties would be investigated. These jobs can be dividing into three years to carry out: Firstly year, the objective will be focus on Ti-Ni and Ti-Al arc spraying pseudo coatings including operated parameters, coating characterization and phase transition will be discuss, and in the second year, the main work will be concentrated on the Ti-base intermetallic powder fabricated by combining mechanical alloying with spray drying, and the coatings deposited by both HVOF(High Velocity Oxygen-Fuel) and flame spraying process will be study. In the last year, the effects of nitriding on wear and corrosion resistance of thermal sprayed Ti-base coatings will be investigated. In this research, all of as sprayed and nitride treated coatings properties such as micro-hardness, micro-structure, surface hardness and chemical compositions would be detect by SEM, XRD, AFM, ESCA etc., instruments. The wear resistance and tribological mechanisms would be investigated that through by the tribo-test under dry and lubrication conditions. All of experiments and analyses, such as the produce of Ti-based pseudo coatings and Ti-base intermetallic coatings, wear tests of samples in this program will be adopt the experimental design method. This method will be helpful for the control of the processing through these experiments. Another, it shall be provide the relationship and to establish of arithmetical models between the experimental parameters and the results of tests (such as sample hardness, contents and structures of composite, friction coefficient, temperature increment, micro morphology of the wear track, and the particles shape). ; 研究期間 9808 ~ 9907 |
