Water jet high pressure nozzle consists of sintered tungsten carbide with additions of carbides and binder

摘要

Water jet high pressure nozzle consists of sintered tungsten carbide with additions of less than 0.5 wt.% carbides and less than 1 wt.% binder. The tungsten carbide crystals have an average grain size of not more than 0.3 microns , measured as average equivalent circular diameter measured on a ground surface in an X-ray scanning electron microscope. The crystals have a hardness HV10 is at least 2500 and a density of at least 99.5 % of the theoretical density. An Independent claim is also included for a process for the production of the nozzle. Preferred Features: A cubic additional carbide/carbonitride of the formula MeCxNy (where, x + y = 0.85-1.05; and x = at least 0.5). The binder is iron or an iron alloy.