Factory Wholesale Permanent Arc neodymium magnet

Composition

comprising a neodymium iron boron magnet blank and an RTMH alloy layer compounded on the surface, wherein
the R is one or more selected from rare earth elements Nd, Tb and Dy;
the T is Fe and/or Co;
the M is one or more elements selected from the group consisting of Al, Si, Ti, V, Cr, Mn, Ni, Cu, Zn, Ga, Ge, Zr, Nb, Mo, Ag, In, Sn, Sb, Hf, Ta, W, Pt, Au, Pb and Bi; and
the H is hydrogen element;
the RTMH alloy layer comprises:
70 to 80 parts by weight of R;
15 to 25 parts by weight of T;
15 to 35 parts by weight of M; and
0.8 to 1.2 parts by weight of H;
the mass proportion of the RTMH alloy layer with respect to the total mass of the neodymium iron boron magnet is 2% to 3%.