本實驗採用熱熔射製程技術，於低碳鋼底材上披覆WC/Ni熔射塗層。主要目的為探討添加碳化鎢對鎳基熔射塗層之機械性質、磨潤性質及抗氧化性能之影響。實驗主要分為三個部份：第一部份探討WC摻雜比例(0 ~ 60 %)對於鎳基合金塗層性能之影響；第二部份探討微米（傳統型）及奈米尺寸之WC晶粒對於鎳基合金塗層性能之影響；第三部份探討熱熔射技術(HVOF and Flame spray/fusion)對於WC/Ni塗層性能之影響。
由實驗結果得知，WC/Ni熔射塗層隨著WC摻雜比例之提升，硬度、抗磨耗、耐氧化方面的表現皆隨之提升，其中以60 %WC摻雜比例為最佳。而摻雜奈米結構WC之鎳基熔射合金塗層之各性能表現皆優於摻雜一般傳統型WC之鎳基合金塗層，證實奈米結構WC具有較優異之強化鎳基熔射合金效果。此外，HVOF製程所製備之塗層於各方面之性能表現亦優於Flame spray/fusion製程，證實此系列塗層較適於以HVOF製程製備。
總結實驗結果，採用HVOF製程技術製備摻雜60 %奈米結構WC之鎳基熔射合金塗層具有最高硬度值HV0.21853.8及最佳抗磨耗及耐氧化性能表現。

The main purpose of this research was to study the effects of WC addition on mechanical and tribological properties, and anti-oxidation of Ni-based thermal sprayed coatings. The WC/Ni coatings were prepared by thermal spraying technique. The experiment was divided into three parts. In the first part, the effect of content (0-60 % of WC addition) on the properties of Ni-based alloy coatings was investigated. In the second part, the effect of WC grain size, micro-scale (conventional) and nano-scale, on the properties of Ni-based alloy coatings was investigated. In the third part, the effects of thermal spraying processes (HVOF and Flame spray/fusion) on the properties of WC/Ni thermal sprayed coatings were investigated.
The results revealed that the hardness, wear resistance, and oxidation resistance of WC/Ni coatings were increased with increasing content of WC addition. And, the coatings with 60 % WC addition showed the best properties. The performance of the Ni-based alloy coatings added with nano-structured WC was better than the ones added with conventional WC. It was proved that nano-structured WC provides better enhancements on Ni-based sprayed alloy coatings. The properties of the coatings prepared by HVOF were superior to the ones prepared by flame spray/fusion process. It was learned that coatings studied here were more suitable to be prepared by HVOF process.
In conclusion, the Ni-based sprayed alloy coatings with addition of 60 % nano-structured WC prepared by HVOF had the highest hardness HV0.21853.8, the best wear resistance, and oxidation resistance.

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