Nikel Ara Katman Kullanılarak İnsörtlü Toz Enjeksiyon Kalıplama Yöntemiyle WC-Co/HSS Kompozit Parça Üretiminin Araştırılması

Yıl 2018, Cilt: 6 Sayı: 2, 374 - 384, 30.06.2018

Harun Koçak , Kamran Samet Oğuz Yılmaz Çetin Karataş

https://doi.org/10.29109/http-gujsc-gazi-edu-tr.338871

Cited By: 4

Öz

Toz
enjeksiyon kalıplama yöntemiyle yüksek yoğunluklu metal, seramik,
kompozit ve intermetal malzemelerden geometrik hassasiyete sahip küçük
parçaların üretimi yapılabilmektedir. Daha büyük parçalar üretebilmek için
insört adı verilen hazır parça kalıp içerisine yerleştirilerek üzerine toz
enjeksiyon kalıplama yapılmaktadır. Bu yöntem insörtlü toz enjeksiyon kalıplama
(İTEK) olarak adlandırılmaktadır. İTEK yöntemi, 
daha büyük parçaların üretiminde kullanılmasının yanında farklı
malzemelerden parça üretimi için de kullanılabilecek bir yöntemdir. Bu
çalışmada nikel ara katman kullanılarak insörtlü
toz enjeksiyon kalıplama yöntemiyle WC-Co/HSS kompozit parça üretimi
araştırılmıştır. Sinterleme sıcaklığının ve süresinin etkileri, besleme
stokunda meydana gelen boyutsal çekme ve ara bölgedeki kesme dayanımı
incelenmiştir. Sıcaklık ve süre arttıkça enjekte kısmın boyutsal çekme miktarı
artmaktadır. En yüksek boyutsal çekme oranı, 1250 °C 360 dakikada sinterlenen
numunelerde %15,92 olarak ölçülmüştür. Deneylerde en yüksek kesme mukavemeti
1200 °C sıcaklık ve 120 dakika sinterleme süresiyle, 100 µm Ni ara katman
kullanılan numunede 114 MPa olarak elde edilmiştir.  

Anahtar Kelimeler

İTEK, WC-Co, HSS

Kaynakça

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