How Improved to WC Based Hard Materials

Öz

Tungsten carbide is known to have excellent corrosion resistance and high hardness within carbide ceramics. Due to their superior mechanical properties and wear resistance, tungsten carbide cutting tools containing Co binder have been the subject of many studies. There are a limited number of works regarding the use of Ni and Fe as a binder in tungsten carbide based composites, especially processing with microwave radiation. In this study, a composite cutting tool made of electroless nickel coated tungsten carbide ceramic powder was produced by microwave sintering. Two different tungsten carbide powder sizes of 2 µm and 10 µm were used for the production of composite cutting tool. The microwave sintering was carried out at two different temperatures of 1200 and 1400 ° C for 2 hours. Characterization of composite cutting tools was made by XRD, hardness, compression test and electron microscopy techniques.

Anahtar Kelimeler

• Powder Metallurgy,Ceramic–Metal Composites,,Microwave,,Sintering,,Electroless Plating

WC Tabanlı Sert Malzemeler Nasıl Geliştirili

Öz

Tungsten karbür seramikler içerisinde mükemmel korozyon direnci ve yüksek sertliğe sahip olduğu bilinmektedir. Üstün mekanik özellikleri ve aşınma direncinden dolayı, Co bağlayıcı içeren tungsten karbür kesici takımlar birçok çalışmaya konu olmuştur. Tungsten karbür esaslı kompozitlerde, özellikle mikrodalga radyasyonu ile işlem yapan, Ni ve Fe'nin bağlayıcı olarak kullanımıyla ilgili sınırlı sayıda çalışma vardır. Bu çalışmada, elektriksiz nikel kaplı tungsten karbür seramik tozundan yapılmış bir kompozit kesici alet mikrodalga sinterleme ile üretildi. Kompozit kesici alet üretiminde 2 farklı tungsten karbür toz büyüklüğü 2 µm ve 10 µm kullanıldı. Mikrodalga sinterleme, 2 saat boyunca iki farklı 1200 ve 1400 ° C sıcaklıkta gerçekleştirildi. Kompozit kesici aletlerin karakterizasyonu XRD, sertlik, sıkıştırma testi ve elektron mikroskobu teknikleri ile yapılmıştır.

Anahtar Kelimeler

• Toz Metalürjisi,,Seramik-Metal Kompozitler,Mikrodalga Sinterleme,Akımsız Kaplama

Kaynakça

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