Hard coating and hard-coating-covered member

A hard coating that is to be adhered to a surface of a substrate so as to cover the surface of the substrate, wherein

• the hard coating has a total thickness of a range of 0.5-20 μm and includes three kinds of layers that are alternately laminated, wherein the three kinds of layers consist of two kinds of single composition layers and a nanolayer-alternated layer, wherein the two kinds of single composition layers are constituted by respective two of an A composition, a B composition and a C composition, and wherein the nanolayer-alternated layer includes two kinds of nanolayers which are constituted by respective two of the A composition, the B composition and the C composition and which are alternately laminated;
• the A composition is a nitride that is represented by a composition formula of Ala Crb αc, wherein atomic ratios a, b, c satisfy 0.30≤a≤0.85, 0.15≤b≤0.70, 0≤c≤0.10 and a+b+c=1, and wherein an optional additive component α is at least one kind of element selected from B, C, Ti, V, Y, Zr, Nb, Mo, Hf, Ta and W;
• the B composition is a nitride that is represented by a composition formula of Ald Cre Sif βg, wherein atomic ratios d, e, f, g satisfy 0.20≤d≤0.85, 0.10≤e≤0.50, 0.03≤f≤0.45, 0≤g≤0.10 and d+e+f+g=1, and wherein an optional additive component β is at least one kind of element selected from B, C, Ti, V, Y, Zr, Nb, Mo, Hf, Ta and W;
• the C composition is a nitride that is represented by a composition formula of Alh Cri (SiC)j γk, wherein atomic ratios h, i, j, k satisfy 0.20≤h≤0.85, 0.10≤i≤0.50, 0.03≤j≤0.45, 0≤k≤0.10 and h+i+j+k=1, and wherein an optional additive component γ is at least one kind of element selected from B, C, Ti, V, Y, Zr, Nb, Mo, Hf, Ta and W;
• each of the two kinds of single composition layers has a thickness of a range of 0.5-1000 nm;
• and
• each of the two kinds of nanolayers has a thickness of a range of 0.5-500 nm, and the nanolayer-alternated layer has a thickness of a range of 1-1000 nm.