Novel Development of an NbC‐Containing Powder‐Metallurgical Martensitic Steel with Outstanding Tribocorrosion Resistance

The development of NbC-containing martensitic stainless steels has made it possible to unite the properties high corrosion resistance and wear resistance. If NbC is used as a hard phase instead chromium carbide, abrasive increased due greater hardness NbC. solubility in low. For this reason, fully available form passive surface layer increase In steel melt, niobium leads formation primary NbC, which grows very rapidly. Atomization PM coarse phases that clog nozzle. Therefore, until now, with are produced using route so-called diffusion alloying; however, production complex expensive. Herein, novel Nb-rich MC-containing wear- corrosion-resistant usual presented. This consists matrix evenly dispersed MC having volume 2.5%. Due (>750 HV30) combination pitting corrosion, exhibits outstanding tribocorrosion 0.9% NaCl solution.