Soft magnetic alloy powder, dust core, and magnetic component

A soft magnetic alloy powder comprising a plurality of soft magnetic alloy particles of a soft magnetic alloy represented by a composition formula (Fe(1−(α+β))X1αX2β)(1−(a+b+c++e+f+g))MaBbPcSidCeSfTig, wherein

• X1 represents at least one selected from the group consisting of Co and Ni;
• X2 represents at least one selected from the group consisting of Al, Mn, Ag, Zn, Sn, As, Sb, Cu, Cr, Bi, N, O and rare earth elements;
• M represents at least one selected from the group consisting of Nb, Hf, Zr, Ta, Mo, W and V;
• a, b, c, d, e, f, g, α and β satisfy the following relations:
• 0.020≤a≤0.14,
• 0.020<b≤0.20,
• 0<c≤0.15,
• 0≤d≤0.060,
• 0≤e≤0.040,
• 0≤f≤0.010,
• 0≤g≤0.0010,
• α≥0,
• β≥0, and
• 0≤α+β≤0.50, wherein at least one of f and g is more than 0;
• and wherein
• the soft magnetic alloy has a nano-heterostructure with initial fine crystals present in an amorphous substance;
• the surface of each of the soft magnetic alloy particles is covered with a coating portion;
• and
• the coating portion comprises a compound of at least one element selected from the group consisting of P, Si, Bi, and Zn.