Journals / Düzce Üniversitesi Bilim ve Teknoloji Dergisi / 2020 / Cilt: 8 - Sayı: 2

Investigation of the Effects of Cryogenic Treatment Applied on Coated Tungsten Carbide Tools on Machinability of AISI H11 Steel

Kaplamalı Tungsten Karbür Takımlar Üzerine Uygulanan Kriyojenik İşlemin AISI H11 Çeliğinin İşlenebilirliği Üzerine Etkilerinin Araştırılması

Pages
1650–1660
Publication Date
2022-10-12
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Experimental results showed that the cryogenic treatment increases the abrasion resistance of the cutting tool.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study, the effects of cryogenic treatment on cutting tool performance in turning of AISI H11 hot work tool steel were investigated.
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Key Findings & Data:Shallow cryogenic treatment for 6 hours at -80 °C (SCT6), deep cryogenic process at -196 °C for 6 hours (DCT6) and deep cryogenic treatment at -196 °C for 24 hours (DCT24) was applied.
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Conclusion & Impact:Experimental results showed that the cryogenic treatment increases the abrasion resistance of the cutting tool.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Sığ/Derin kriyojenik işlem · AISI H11 · mikrosertlik

Abstract

In this study, the effects of cryogenic treatment on cutting tool performance in turning of AISI H11 hot work tool steel were investigated. In experiments, TiAlN+TiN coated tungsten carbide tools were used. Shallow cryogenic treatment for 6 hours at -80 °C (SCT6), deep cryogenic process at -196 °C for 6 hours (DCT6) and deep cryogenic treatment at -196 °C for 24 hours (DCT24) was applied. Turning experiments were carried out with constant cutting depth (0.6 mm) and feed rate (0.18 mm/rev) and four different cutting speeds (320, 360, 400 and 440 m/min). Experimental results showed that the cryogenic treatment increases the abrasion resistance of the cutting tool. The lowest cutting tool wear and surface roughness values were obtained with DCT24 tool. Improvements in flank wear were observed at 13-28%, and surface roughness at 7-14%. On the other hand, it was determined that the cryogenic process provides an increase of 4.4-8.7% in the hardness of the cutting tools. The highest hardness increase has also occurred in the DCT24 tool.

Özet

Bu çalışmada, AISI H11 sıcak iş takım çeliğinin tornalanmasında kriyojenik işlemin kesici takım performansı üzerine etkileri araştırılmıştır. Deneylerde TiAlN+TiN kaplı tungsten karbür takımlar kullanılmıştır. Kesici takımlar üzerine 6 saat süre ile -80 °C’de sığ kriyojenik işlem (SCT6), 6 saat süre ile -196 °C’de derin kriyojenik işlem (DCT6) ve 24 saat süre ile -196 °C’de derin kriyojenik işlem (DCT24) uygulanmıştır. Tornalama deneyleri 0,6 mm kesme derinliği, 0,18 mm/dev ilerleme hızı ve 320, 360, 400 ve 440 m/dak olmak üzere dört farklı kesme hızında gerçekleştirilmiştir. Deneysel sonuçlar kriyojenik işlemin kesici takımın aşınma direncini artırdığını göstermiştir. En düşük kesici takım aşınması ve yüzey pürüzlülüğü değerleri DCT24 takımla elde edilmiştir. Yanak aşınmasında %13-28 oranlarda, yüzey pürüzlülüğünde ise %7-14 oranlarda iyileşmeler gözlenmiştir. Diğer yandan kriyojenik işlemin kesici takımların sertliğinde %4,4-8,7 oranlarda artış sağladığı tespit edilmiştir. En yüksek sertlik artışı da DCT24 takımda meydana gelmiştir.

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Cite This Article

ÖZBEK, N. A. (2022). Investigation of the Effects of Cryogenic Treatment Applied on Coated Tungsten Carbide Tools on Machinability of AISI H11 Steel. Düzce Üniversitesi Bilim ve Teknoloji Dergisi, Cilt: 8 - Sayı: 2, 1650–1660. https://ajindex.com/articles/494185

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