Cemile KAYIŞ, Ege Anıl DİLER, Hatice SANDALLI, Fuat Can AĞARER

TiN/CrN, CrAlN ve TiN Kaplamaların AISI M2 Takım Çeliğinin Performansına Etkileri

Bu çalışmanın amacı, seramik esaslı çeşitli kaplama malzemelerinin, somun delme işlemlerinde kullanılan AISI M2 yüksek hız çeliğinden üretilmiş delme zımbalarının performanslarına etkilerinin araştırılmasıdır. AISI M2 zımbalar, fiziksel buhar biriktirme tekniği kullanılarak TiN, TiN/CrN ve CrAlN ile kaplanmıştır. Takım ömrünü belirlemek için TiN, TiN/CrN ve CrAlN ile kaplanmış AISI M2 zımbaların toplam strok sayıları dikkate alınmıştır. TiN/CrN kaplı AISI M2 zımba, TiN ve CrAlN kaplı zımbalara göre daha yüksek strok sayılarına kadar çalışabilmiştir. TiN/CrN ve CrAlN kaplamaların, delme işlemindeki gerçek çalışma koşullarına (darbeli yükleme koşulları) kıyasla normal yükleme koşulları altında aşınma direncini incelemek için sertlik ve aşınma testleri yapılmıştır. CrAlN kaplamanın sertlik ve aşınma direnci TiN/CrN kaplamadan daha yüksek olmuştur. Normal yükleme koşulları ve kayma hızlarında, CrAlN kaplamanın aşınma performansı daha yüksek iken darbeli yükleme koşullarında, TiN/CrN kaplama, takım ömrünün daha yüksek olmasını sağlamıştır.

Anahtar Kelimeler:

AISI M2 takım çeliği, Delme zımbası, TiN/CrN, CrAlN, Takım ömrü, Somun

Effects of TiN/CrN, CrAlN, and TiN Coatings on the Performance of AISI M2 Tool Steel

The aim of this study is to investigate the effects of various ceramic-based coatings on the performance of AISI M2 high-speed steel punch used in the nut piercing process. AISI M2 punches were coated with TiN, TiN/CrN, and CrAlN utilizing a physical vapour deposition method. The total stroke number of the punches was used to evaluate the tool life of TiN, CrAlN, and TiN/CrN coated AISI M2 punches. AISI M2 punch coated with TiN/CrN was able to work up to greater stroke numbers than punches coated with TiN and CrAlN. Hardness and wear tests were performed to study the wear resistance of TiN/CrN and CrAlN coatings under relatively normal load conditions compared to actual working conditions (impact loading conditions) in the piercing process. The hardness and wear resistance of the CrAlN coating were greater than those of the TiN/CrN coating. The wear performance of the CrAlN coating was higher at normal loads and sliding speeds while the tool life of the TiN/CrN-coated punch was better under impact loading conditions.

Keywords:

AISI M2 tool steel, Piercing punch, TiN/CrN, CrAlN, Tool life, Nut,

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