Microstructural effects on the sliding wear resistance of a cobalt-based alloy

TIG Yöntemi ile Ostenitik Paslanmaz Çelik Yüzeyine Kaplanan Stellite 6+FeMo Tabakasının Mikroyapı ve Sertlik Özelikleri Üzerine Etkisinin İncelenmesi

“…Kobalt esaslı stellite alaşımları sert dolgu malzemesi olarak kullanılmakla birlikte yüksek sıcaklık, yüksek basınç ve yüksek aşınma direnç ide göstermektedir. Farklı stellite alaşımları arasında endüstride en yaygın kullanılan stellite 6 alaşımının yaklaşık bileşimi Co-28Cr-4.5W-1.1C (% Ağırlık) dur [8][9]. Stellite 6, karbürler alaşıma güç katarken kromun korozyon direnci sağladığı, kullanışlı bir sertleştirici alaşımdır.…”

Single asperity nanoscratch behaviour of HIPed and cast Stellite 6 alloys

“…This cobalt-based alloy is generally used in the power generation, marine, automotive, aerospace, and oil and gas industries to provide wear resistant components particularly in lubrication-starved, high temperature, or corrosive environments [2][3]. Despite wide ranging use of this alloy, there is limited published research comparing the nanoscale tribo-mechanical behavior of this particular alloy, produced by the two different manufacturing processes of re-HIPing (Hot Isostatic Pressing) and casting.…”

“…This alloy is generally used in impact and fatigue resistance applications such as valve seat and gate, pump shaft and bearing, erosion shield, and rolling couples [1]. The structure-property relationships of cast CoCr28W alloy has been a topic of research for a number of investigations [1][2][3][4][5]. The cast alloy exhibits a hypoeutectic microstructure with the primary FCC Corich dendrites surrounded by Cr-rich M 7 C 3 (M=metal) eutectic carbides.…”

Tribological Behavior of Stellite 720 Coating under Block-on-Ring Wear Test

“…With higher loads or elevated sliding velocities, a transition to a severe metallic wear regime occurs, requiring the nucleation and propagation of cracks for the formation of wear debris. Frenk and Kurz [4] investigated the influence of microstructure on the wear properties of Stellite 6. The drying-sliding wear test against a much harder mating material (90% WC -10% Co in weight) showed that under a severe metallic wear regime, the wear rate was independent of the microstructure (size and volume fraction of the phases).…”