Patent ID: 8684475
Filing Date: 2014-04-01
Classification: B62D,C21D,C23C

Abstract:
1. A pin bushing joint of an endless track of a track-type machine, the pin bushing joint comprising: a bushing including a first outer surface extending from a first end to a second end of the bushing and having an outer diameter and including an inner surface having an inner diameter; and a track pin including a second outer surface, wherein a portion of the second outer surface of the track pin substantially conforms to a portion of the inner surface of the bushing to form a wear surface, and wherein the wear surface has a metallurgically bonded, wear-resistant coating, the wear-resistant coating comprising a fused hard metal alloy comprising at least 60% by weight iron, cobalt, nickel or alloys thereof, the wear-resistant coating having an overall Vickers hardness greater than 950 HV the wear-resistant coating excluding carbides, and wherein at least a portion of the first outer surface has a metallurgically bonded, wear-resistant coating, the wear-resistant coating comprising a fused hard metal alloy comprising at least 60% by weight iron, cobalt, nickel or alloys thereof, the wear-resistant coating on the outer surface having an overall Vickers hardness greater than 950 HV.