Researches on Making High Performance Surface and Performance of the Surface

Material WC-12Co has good characters of wear-resisting, anticorrosion and high temperature resisting. High performance material can be made by surface technology that adds WC-12Co on the surface of common material. With the flame spraying and laser cladding technique, the surface of 45# steel is covered firstly with a layer of WC-12Co cermets powder, and then cladded with laser. The laser cladding microstructure and micro-appearance is analyzed with SEM; interface element distributing with EDS; and micro-penetration hardness distributing with HXD-1000B Vickers hardness tester. After laser-cladding, the original slice-like structure of flame spraying layer changes into a denser clad coat, which is metallurgic with the base. The coating micro-organization presents as polygon, dendrite arm and granularity from the surface into depth. The hardness of coat is highest on the surface, decreases with the increase of the depth, and has an abrupt change on the interface between coat and metallic base.