ENDÜSTRİYEL SİALON-TİN KESİCİ UÇ ÜRETİMİNDE PROSES KOŞULLARININ ETKİSİ

Abstract

Süperalaşımlar havacılık alanında yaygın olarak kullanılan ve işlenmesi zor malzemelerdir. Alümina ve silisyum nitrür esaslı seramik matrisli kompozitler süperalaşımların işlenmesinde kullanılmaktadırlar. SiAlON esaslı seramik kesici uçlar seri üretime uygun gaz basınçlı sinterleme tekniği ile üretilebildikleri için Al₂O₃-SiC_w kesici uçlara karşı maliyet avantajı sağlamaktadırlar. Ancak SiAlON seramikleri kimyasal dayanım açısından süperalaşım işlenmesinde yeterli değildir. Bu nedenle bu çalışmada SiAlON seramiklerinin kimyasal dayanımını arttırmak için TiN ilavesi yapılarak özgün komposizyon tasarımlarıyla hazırlanmış SiAlON-TiN kompozitlerinin pilot ölçekte üretimi yapılarak, üretim esnasında karşılaşılan sorunlar ve çözüm önerileri açıklanmıştır. Üretim sürecinde yapılan optimizasyon çalışmaları neticesinde istenen özelliklerde kesici uç üretimi pilot ölçekte başarılmıştır.

Keywords

• Kesici Uç,SiAlON-TiN Kompozit,Proses,Mikroyapı,Endüstriyel Üretim

THE EFFECT OF PROCESS CONDITIONS ON THE PRODUCTION OF INDUSTRIAL SİALON-TİN CUTTING TOOLS

Abstract

Super alloys are widely used in the field of aviation and they are difficult to machine. Alumina and silicon nitride based ceramic matrix composites have been used for super alloy machining. Since SiAlON based ceramic cutting tools can be produced with gas pressure sintering method which is suitable for serial production, they provide cost advantages over Al₂O₃-SiC_w cutting tools. However SiAlON ceramics have the disadvantage for super alloy machining due to inadequate properties in respect of chemical durability. Therefore in this study in order to enhance chemical durability of SiAlON ceramics, SiAlON based ceramics prepared with unique compositional design with TiN incorporation. SiAlON-TiN composites were prepared in pilot scale which allows description of the problems and their solutions. The optimization efforts in the production process of SiAlON-TiN cutting tools with the desired properties have been achieved in a pilot scale.    

Keywords

• Cutting tool,SiAlON-TiN Composites,Process,Microstructure,Industrial Production

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