Zn-15Al-3Cu-1Si alaşımı ve SAE 660 bronzunun yağlı durumdaki aşınma karakteristikleri

Ali Paşa Hekimoğlu, Temel Savaşkan
383 65

Öz


Bu çalışmada Zn–15Al–3Cu–1Si alaşımının yağlı çalışma koşullarındaki sürtünme ve aşınma davranışları blok-disk tipi bir deney düzeneği kullanılarak incelendi. Sürtünme ve aşınma deneyleri farklı yağ debileri (0.25-3.0 cm3h-1), kayma hızları (0.5 - 3.0 ms-1) ve basınçlarda (1 - 8 MPa) gerçekleştirildi ve sonuçlar SAE 660 yatak bronzundan aynı koşullarda elde edilen sonuçlarla karşılaştırıldı. Hem çinko esaslı alaşımın hem de bronzun sürtünme katsayılarının artan basınç ve yağ debisi ile azaldığı, ancak kayma hızıyla önemli bir değişim sergilemediği görüldü. Alaşımların çalışma sıcaklıklarının artan yağ debisi ile azalıp artan basınç ve kayma hızı ile arttığı belirlendi. Alaşımlarda aşınma ile meydana gelen hacim kaybının ise artan yağ debisi ile azalıp artan basınçla arttığı, ancak kayma hızından fazla etkilenmediği görüldü. Ayrıca, Zn–15Al–3Cu–1Si alaşımının belirtilen koşullarda SAE 660 alaşımından daha yüksek aşınma direnci sergilediği görüldü.      


Anahtar kelimeler


Zn–15Al–3Cu–1Si alaşımı; SAE 660 bronzu; sürtünme ve aşınma

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