Characterization and Mechanical Properties of WC-Co Based Scratch Tips

Year 2013, Volume: 13 Issue: 2, 1 - 11, 01.08.2013

Muzaffer Erdoğan Ayhan Erol Ahmet Yönetken

Abstract

Tungsten carbide is known to have excellent high hardness and wear resistance carbide ceramics feature. Thanks to its superior properties and wear resistance carbide cutting-plotter teams, if desired, the industry has a wide application area. In this study, the WC-based material, ceramic material Co. To produce composite samples. In other words, ceramic and metal powders, with powder metallurgy technique, of mechanical properties and composite materials to produce the survey covers. WC powders (80%) 2 µm and 10 µm grain size grain size of ceramic-based material with a metal-based 2 µm Co(20%) composites were produced. Mixture of powders of various composition, the composition of which will be weighed and mixed in 24-hour cap in the mechanical stirrers in a homogeneous way. Samples (approximately 5 grams) in the form of capsules, pressed in a cylindrical mold. 15 mm in diameter and 2-5 mm high, made of extruded samples. 90N% + 10H2% gas atmosphere in the sintering process oC sintered between temperatures. Experimental studies were examined in accordance with literature data obtained by analyzing the results.In addition, the production of composite materials obtained by this method has provided a new perspective. The results obtained with this study, produced by microwave sintering technique WC-Co greatly improved the quality of composite materials. © Afyon Kocatepe Üniversitesi

Keywords

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WC-Co Esaslı Çizici Kalem Karakterizasyonu ve Mekaniksel Özellikleri

Abstract

Tungsten karbür üstün sertlik özelliği ve aşınmaya karşı direnci ile bilinen karbürlü seramiklerdendir. Bu üstün özellikleri sayesinde Karbürler kesici-çizici takımlarında ve aşınmaya karşı direnç istenilen durumlarda endüstride geniş bir kullanım alanına sahiptir. Bu çalışmada, WC seramik malzemesinin Co esaslı malzemeden kompozit numuneler üretilmiştir. Yani seramik ve metal tozları, toz metalurjisi tekniği ile kompozit malzemeler üretmek ve mekaniksel özelliklerinin araştırmasını kapsamaktadır. WC tozlarının (%80) 2 µm ve 10 µm tane boyutundaki seramik esaslı malzeme ile metal esaslı 2 µm tane boyutundaki Co (%20) kompozitler elde edilmiştir. Karışımı yapılacak olan tozlar çeşitli kompozisyon bileşimlerinde tartılarak kap içerisinde mekanik karıştırıcılarla homojen bir şekilde 24 saat karıştırılmıştır. Numuneler (yaklaşık 5 gram) silindirik kalıp içerisinde kapsül şeklinde preslenmiştir. Preslenen sinterlenmemiş numuneler 15 mm çapında ve 2-5 mm yüksekliğinde üretilmiştir. Sinterleme işlemleri ise %90N+%10H2 gazı atmosferinde oC sıcaklıklarında sinterlenmiştir. Deneysel çalışmalar sonucu elde edilen analiz sonuçları literatür verileri doğrultusunda incelenmiştir.Ayrıca, bu yöntemle elde edilen kompozit malzemelerin üretimine yeni bir bakış açısı sağlamıştır. Bu çalışma ile elde edilen sonuçlar; mikrodalga sinterleme tekniği ile üretilen WC-Co’lı kompozit malzemelerin kalitesinin arttırılması sağlanmıştır.

Keywords

Toz Metalurjisi, Seramik-Metal Kompozitler, Presleme, Mikrodalga Toz Sinterleme, Çizici Kalem

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