The surface coating tool

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PROBLEM TO BE SOLVED : To provide a surface-coated tool having high wear resistance and high fracture resistance. ŽSOLUTION : The surface-coated tool having superior wear resistance and fracture resistance has a covering layer which has a composition of Ti1-a-bAlaMb(CxN1-x) coated on the surface of a substrate, wherein M is at least one element expect Ti selected from elements in the groups 4, 5 and 6 in the periodic table, rare earth elements and Si; 0.40≤a≤0.65; 0.05≤b≤0.3; and 0≤x≤1. The covering layer has a plurality of protruding portions dispersed on the surface. The protruding portions comprise a first protruding portion containing Ti or Al as a main component and a second protruding portion containing M as a main component. ŽCOPYRIGHT : (C)2008, JPO&INPIT Ž