EROSION RESISTANT FLUID PASSAGEWAYS AND FLOW TUBES FOR EARTH-BORING TOOLS, METHODS OF FORMING THE SAME AND EARTH-BORING TOOLS INCLUDING THE SAME

摘要

Flow tubes for earth-boring tools include hardfacing material for protecting the tubes from erosion due to the flow of fluid through a fluid passageway extending therethrough. Earth-boring tools include an erosion-resistant material covering a surface of a body of the tools for protecting the bodies from erosion due to the flow of fluid through a fluid passageway extending therethrough. Methods of forming earth-boring tools include forming a body having a fluid passageway extending therethrough and covering a surface of the body with a hardfacing material. The surface of the body may be located in a region susceptible to erosion when fluid is caused to flow through the fluid passageway.