Hi
looking in the field I have not seen any Thermal Spray Process for this application. Another technology used in Japan is called the TD process
TD Process
TD process produces high-functional coating formed from carbide including niobium, and chromium. In the process, the workpiece is dipped into the high-temperature salt bath to be coated uniformly. The coating is applicable to workpiece of complicated shape and achieves high hardness of Hv3200-3900. TD process is a vital technology and obtains good evaluation in mold production industry.
https://www.tocalo.co.jp/english/technical/td.html