INVESTIGATION OF THE SURFACE PROPERTIES OF HARDENED AND PVDCOATED DIN 115CRV3 STEEL FOR CUTTING TOOLS APPLICATION

Year 2013, Issue: 032, 91 - 102, 31.12.2013

Mustafa Özgür Öteyaka Muhammet Mustafa Yıldırım

Abstract

The use of cutting tools coated with ceramics is growing every year, and there is a need for highperformance and cheaper tools. In this study, an inexpensive cold work tool steel DIN 115CrV3 was hardened at different temperatures and was coated with physicalvapor deposition (PVD). The results show that the highest hardness value is obtained after quenching at 780°C. The ferrite and cementite phase transformed to martensite with a hardness of 820 HV. The rigid TiN layer (1883 HV) has been found to be thick with lower surface roughness compared with the CrN layer (1792 HV). The corrosion test performed on tools found that CrN coating had lower corrosion potential (−220 mV) than rivals. The findings suggest that ceramic coating was successfully performed on DIN 115CrV3 and tribological performance should be tested.

Keywords

Steel, Cutting tools, Hardness

SERTLEŞTİRİLMİŞ VE PVD KAPLI DIN 115CrV3 ÇELİĞİNİN KESİCİ TAKIM UYGULAMALARI İÇİN YÜZEY ÖZELLİKLERİNİN ARAŞTIRILMASI

Abstract

Seramik ile kaplanmış kesici takımların kullanılması her yıl artmaktadır ve bu nedenle yüksek performanslı aynı zamanda ucuz kesici takımlara ihtiyaç vardır. Bu çalışmada, ucuz bir soğuk iş takımı olan DIN 115CrV3 çeliği farklı sıcaklıklarda sertleştirilmiş ve fiziksel buhar çöktürme (PVD) ile kaplanmıştır. Sonuçlar, 780 ° C de sertleştirme işlemi sonrası en yüksek sertlik değerinin elde edildiğini göstermektedir. Ferrit ve sementitfazı, sertliği 820 HV olan martenzitfazına dönüşmüştür. Sert olan TiN tabakanın (1883 HV), CrN tabakaya (1792 HV) göre yüzey pürüzlülüğü düşük ve kaplama kalınlığı büyüktür. Uygulanan korozyon testleri sonucunda CrN kaplamanın diğerlerine göre daha düşük korozyon potansiyeline (-220 mV) sahip olduğu bulunmuştur. Bulgular seramiklerin başarıyla DIN 115CrV3 çeliğine kaplandığını ve tribolojik performanslarının incelenmesi gerektiğini göstermektedir.

Keywords

Çelik, Kesici takımlar, Sertlik

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