In this paper ,the structure, microhardness , friction resistence and the distribution characteristics of composition of laser clad zone of WC-12Co, 45C on TC4 were investigated. Cross-section of the laser clad zone showed three distinct regions which consisted of clad layer, melt zone and heat-affecting zone .The result showed that laser cladding leads to the formation of a continue and compact clad layer and the elimination of the lamallar structural character which occurred in plasma-spraying WC-12Co, 45...