1. Surface intensifying, like cold stamping, forging & pressing, bending, extrusion, stretching, die-casting moulds. XKS-350 Electro-spark intensifying machineApplications: 1.EDM electrodes are made of carbide.Increase the surface of ferrous metal up to HV1100-1400 (HRC70-72 °). Increase the wear resistance, and corrosion resistance, extend usage life 1-3 times. Mainly for surface hardening, like ...