Ayşe Nur ACAR, Abdul Kadir EKŞİ, Ahmet EKİCİBİL

Toz Metalurjisi ile Üretilen 316L Östenitik Paslanmaz Çeliklerin Termofiziksel Özelliklerin Üzerindeki Basıncın Etkisi

Otomotiv gibi endüstriyel alanlarda kullanılan östenitik paslanmaz çelik yüksek fiziksel ve mekaniksel özelliklere sahiptir. Bu çalışmada benzer ya da benzere yakın şekilli ürün ve karmaşık şekilli malzeme üretilmesine olanak sağlanmasından dolayı araştırmacılar tarafından cazip görülen toz metalurjisi yöntemiyle hazırlanan 316L östenitik paslanmaz çeliğin termofiziksel özellikleri araştırılmıştır. Östenitik paslanmaz çelikler 400 ve 600 MPa basınçlarında preslenmiş ve preslenen östenitik paslanmaz çelik numuneler 1200 °C sıcaklığında 1 sa boyunca inert gaz atmosferinde sinterlenmiştir. Bu sinterlenmiş östenitik paslanmaz çeliklerin termofiziksel özellikleri oda sıcaklığından 600 °C’ye kadar olan sıcaklık aralığında ısı akısı tipli Diferansiyel Taramalı Kalorimetreyle (DSC) ile ölçülmüştür. Bu özellikler SEM görüntüleri, EDS spektrumları ve OM (optik mikroskop) görüntüleri ile desteklenmiştir.

Anahtar Kelimeler:

Özgül ısı kapasitesi, Entalpi, Östenitik paslanmaz çelik, Toz metalurjisi

Pressure Influence on the Thermophysical Properties of 316L Austenitic Stainless Steels Manufactured By Powder Metallurgy Method

Austenitic stainless steel that is used in the industrial areas such as automotive has high physical and mechanical properties. In this study; thermophysical properties of 316L austenitic stainless steel prepared by powder metallurgy method that is attracted for researchers due to obtain net or near shaped product and complex shaped materials, have been investigated. Austenitic stainless steels pressed on the 400 and 600MPa pressures and pressed austenitic stainless steel samples sintered at 1200 °C temperature for an hour under inert gas atmosphere. The thermophysical features o these sintered austenitic stainless steel were performed at temperature ranging from RT to 600 °C via heat flux type Differential Scanning Calorimeter (DSC). These properties supported by SEM images, EDS spectrums and OM (Optic microscope) images.

Keywords:

Specific heat capacity, Enthalpy, Austenitic stainless steel, Powder metallurgy,

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