Cemented steel is employed generally in the production of parts that experience extreme mechanical loads/wear. In this particular study, the deposition of nanostructured WC and B₄C coatings onto cemented steel (7131) substrates was reported using an optimized EPD process. Nanoparticle suspensions were prepared as stable suspensions in isopropyl alcohol, and then the optimum conditions of voltage and deposition duration were chosen to achieve uniform adherent coatings. After being deposited, all samples were heated to 900 degrees Celsius under an argon atmosphere for 1 h, a process that caused a significant change in density and also coating integrity. Microstructural observations made by FESEM combined with quantitative image analysis (ImageJ) revealed that the porosity was largely reduced, from 8.5 to 2.7 % in the case of B₄C and from 9.2 to 3.5 % in the case of WC coatings. Also, sintering resulted in controlled grain growth. Vickers hardness readings indicated a significant improvement, as hardness values were improved with Vickers readings rising to 832 micro HV on B₄C coated and 708 micro HV on WC coated substrates after sintering as opposed to bare steel, which had readings switched off to be 303 micro HV. These findings make EPD an attractive, scalable, and cost effective method to produce nanoceramic coatings with highly improved.