Abrasive erosion of sintered tungsten carbide base hard alloys

1. The intensity of abrasive erosion of sintered tungsten carbide base hard alloys in a stream of quartz sand varies according to an approximately parabolic law with cobalt content. With decrease in cobalt content their wear resistance falls. 2. The intensity of abrasive erosion of sintered tungsten carbide base hard alloys in a stream of quartz sand depends to a large extent on the grain size of their carbide phase. With increase in mean carbide grain size from 1.5 to 10.6 Μ the intensity of wear of VK6 alloy grows approximately 30 times. 3. With increase in impact speed the relative wear resistance (measured with relation to the wear resistance of St. 3 steel) of sintered tungsten carbide base hard alloys markedly grows. The alloys are capable of effectively withstanding abrasive erosion by high-speed sand streams.