SINTERING TEMPERATURE OPTIMIZATION OF THE ULTRA-HIGH FREQUENCY INDUCTION SINTERED IRON BASED POWDER METAL COMPACTS

Öz

In this study, iron based powder metal (PM) compacts are sintered by two different sintering methods. One of the sintering method is conventional sintering, 2kW atmosphere controlled oven is used in the sintering application. TM compacts are sintered at 1120 ° C for 30 minutes.  In the study other used sintering method is induction. PM compacts are sintered at 6 different temperature from 1000 °C to 1200 ° C for 5 minutes using a 900 kHz ultra-high frequency induction system (UHFIS) with a power of 2.8 kW. Hardness, density and microstructure images of PM compacts are examined and compared each other. When the obtained results are evaluated, 30 minutes conventional sintered PM compacts test results’ are reached at 1120 °C using by UHFIS. Thus, iron-based PM compacts are sintered in 6 times less dwell time while using the induction system.

Anahtar Kelimeler

• Iron,PM,Induction,UHFIS,Sintering

DEMİR ESASLI TOZ METAL MALZEMELERİN ULTRA-YÜKSEK FREKANSLI İNDÜKSİYON SİSTEMİ İLE SİNTERLEME SICAKLIĞI OPTİMİZASYONU

Öz

Yapılan çalışmada, demir esaslı toz metal (TM) malzemeler iki farklı metot kullanılarak sinterlenmiştir.  TM numunelerin bir kısmı 2kW güce sahip atmosfer kontrollü fırında, 1120 °C sıcaklıkta ve 30 dakika sürede geleneksel yöntemle sinterlenmiştir.  Çalışmada kullanılan diğer TM numunelerde 2.8kW güce sahip 900kHz’lik ultra yüksek frekanslı indüksiyon sistemi (UYFİS) kullanılarak, 1000 °C -1200 °C sıcaklıkları arasında 6 farklı sıcaklıkta 5 dakika sürelerde sinterlenmiştir. TM numunelerin sertlik, yoğunluk ve mikro yapı görüntüleri incelenmiş ve kendi aralarında karşılaştırılmıştır. Elde edilen sonuçlar değerlendirildiğinde konvansiyonel sinterleme metot ile 30 dakikada elde edilen değerlere UYFIS kullanılarak 1120 °C sıcaklıkta ulaşılmıştır. Böylece demir esaslı TM numuneler indüksiyon sistemi kullanılarak sinterlendiğinde 6 kat daha kısa sürede elde edildiği görülmüştür.  

Anahtar Kelimeler

• Demir,TM,İndüksiyon,UYFIS,Sinterleme

Kaynakça

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