Toz Metalurjisi Yöntemiyle Üretilen Fe Esaslı Fe-Ni-Cu Elmas Kesici Takımında Co’ın Etkisi

Öz

Bu çalışmada toz metalürjisi (TM) tekniğiyle Fe esaslı Fe-Ni-Cu matrisine ağırlıkça farklı oranlarda (%10-20-30) kobalt (Co) ilave edilerek üretilen numunelerin mikroyapı ve bazı mekanik özellikleri incelendi. Sinterleme; 920 ºC’ de, 35 MPa basınç altında, 4 dk süreyle argon gazı atmosferinde yapıldı. Numunelerin mikroyapısal karakterizasyonu X-ışınları analizi (XRD), taramalı elektron mikroskobu (SEM), enerji dağılım spektrometresi (EDS) ile incelendi. Yoğunluk ölçümleri yapılan numuneler, sertlik ve üç noktalı eğme deneylerine tabi tutuldu. Sonuç olarak; takviye oranının artması ile porozitede azalma meydana geldi. En yüksek sertlik ve yoğunluk değerinin %20 Co ilaveli numunede olduğu görüldü. Co oranı ilavesiyle başlangıçta eğme gerilmesi ve yüzde uzamanın arttığı ve artan Co oranıyla birlikte eğme gerilmesi ve yüzde uzamanın azaldığı gözlendi.

Anahtar Kelimeler

• Elmas kesici takımlar
• Toz metalurjisi
• Kobalt
• Demir esaslı alaşım

The Effect of Co on Fe-Based Fe-Ni-Cu Diamond Cutting Tool Produced by Powder Metallurgy Method

Abstract

In this study, microstructure and some mechanical properties of the samples were investigated produced by adding different weight (10-20-30%) cobalt (Co) to Fe-based Fe-Ni-Cu matrix by powder metallurgy (TM) technique. Sintering; It was carried out at 920 ºC, under 35 MPa pressure, for 4 minutes in an argon gas atmosphere. Microstructural characterization of the samples was examined by X-ray analysis (XRD), scanning electron microscope (SEM), and energy distribution spectrometry (EDS). Density measurements were made and the samples were subjected to hardness and three-point bending tests. As a result; The porosity decreased with the increase in the reinforcement ratio. It was observed that the highest hardness and density value was in the sample with 20% Co added. It was observed that the bending stress and percent elongation increased with the addition of Co ratio and the bending stress and percent elongation decreased with increasing Co ratio.

Keywords

• Diamond cutting tools
• Powder metallurgy
• Cobalt
• Iron baded alloy

Kaynakça

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