Development of new ni-based matrix alloys for tungsten carbide wear resistant overlays using PTAW

The presence of highly abrasive quartz sand within the sticky bitumen in the Athabasca oil sands deposits in Northern Alberta creates an extremely erosive operational environment for equipment in direct contact with the oil sands. The current wear resistant coatings are a Ni-based matrix alloy reinforced with hard tungsten carbide particles and are typically deposited with Plasma Transferred Arc Welding (PTAW). PTA welding process can produce overlays with low substrate dilution, metallurgical bonding to the base material and few defects. Development of new Ni-based matrix alloys will have the potential to increase service life of oil sands ground engaging and transport equipment for oil sands operators.

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