Rulmanlı Yatak Uygulamaları için Çok Yüksek Molekül Ağırlıklı Polietilen ve Döküm Poliamit Termoplastik Esaslı Polimerlerinin Tribolojik Performanslarının karşılaştırılması

Öz

Bu deneysel çalışmada, rulmanlı yatak uygulamalarında kullanılabilecek aşınmaya dayanıklı en iyi özellik gösteren polimer malzemeyi tespit etmek için katkısız çok yüksek molekül ağırlıklı polietilen (ÇYMA-PE) ve döküm poliamit (Döküm PA) polimerleri kullanılmıştır. Tribolojik testler için, disk üzerinde pimli bir aşınma test düzeneği ve karşı disk malzeme olarak AISI 316L paslanmaz çelik malzeme kullanılmıştır. Aşınma ve sürtünme deneyleri, 0.5, 1.0 ve 2.0 m/s gibi üç farklı kayma hızında ve 49N, 98N ve 147N üç farklı yük altında gerçekleştirilmiştir. Çalışmadan elde edilen veriler sonucunda, en yüksek spesifik aşınma oranı kayma hızı 2.0 m/s ve 49N yük altında 53x10-6 mm3/Nm değerine sahip çok yüksek molekül ağırlıklı polietilen polimerinde elde edilmiştir. En düşük spesifik aşınma oranı ise kayma hızı 1.0 m/s ve 147N yük altında 4.6 x10-6 mm3/Nm değeri ile katkısız döküm poliamit polimerinde elde edilmiştir. Elde edilen deney sonuçlarına göre, çok yüksek molekül ağırlıklı polietilen polimeri, döküm poliamit polimere göre ortalama 3.5 kat daha yüksek aşınmaya karşı dirençlidir. Tribolojik performans açısından bakıldığında, çok yüksek molekül ağırlıklı polietilen polimeri, rulmanlı yatak uygulamaları için en uygun malzeme olarak belirlenmiştir.

Anahtar Kelimeler

• Aşınma
• Termoplastik
• Poliamit
• ÇYMA-PE
• Polimer

Comparison of Tribological Performance of Ultrahigh Molecular Weight Polyethylene and Cast Polyamide Thermoplastic Based Polymers for Roller Bearing Applications

Abstract

In this experimental study, pure ultra-high molecular weight polyethylene (UHMWPE) and casting polyamide (Casting PA) polymers were used to find the best wear resistant polymer material that can be used in rolling bearing applications. For tribological tests, a wear test device with a pin on the disc and AISI 316L stainless steel material as the counter disc material were used. The wear and friction tests were carried out under three different sliding speeds of 0.5, 1.0, and 2.0 m/s and under three different loads of 49N, 98N, and 147N. As a result of the data obtained from the study, the highest specific wear rate was obtained in ultra-high molecular weight polyethylene polymer with a sliding speed of 2 m/s and a value of 53x10-6 mm3/Nm under 49N load. The lowest specific wear rate was obtained in the pure casting polyamide polymer with a sliding speed of 1.0 m/s and a value of 4.6x10-6 mm3/Nm under 147N load. According to the test results obtained, the ultra-high molecular weight polyethylene polymer is 3.5 times higher in wear resistance than the casting polyamide polymer. In terms of tribological performance, ultra-high molecular weight polyethylene polymer has been determined as the most suitable material for rolling bearing applications.

Keywords

• Wear
• Thermoplastics
• Polyamide
• UHMWPE
• Polymer

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