The present invention relates to a low roller deformation hot roller
laser repair method, wherein a transition
alloy layer, an intermediate
alloy layer and a surface
alloy layer are sequentially subjected to
laser cladding on the surface of a hot roller from the inner layer, the components of the
alley powder used by the transition alloy layer comprise, by
mass, 0.2-0.3% of C, 3.2-3.6% of Si, 1.2-1.8% of B, 2.2-2.6% of Fe, 7-8% of Cr and the balance of Ni, the components of the
alley powder used by the intermediate alloy layer comprise, by
mass, 0.4-0.5% of C, 3.8-4.3% of Si, 12-13% of B, 2.5-3.2% of Fe, 10-12% of Cr and the balance of Ni, and the components of the
alley powder used by the surface alloy layer comprise, by
mass, 0.05-0.1% of C, 3.0-3.16% of Si, 2-4% of Fe, 16-19% of Cr, 27-30% of Mo, and the balance of Co. According to the present invention, the hot roller repaired by using the hot roller
laser repair method of the present invention has good abrasion resistance, good
corrosion resistance and good thermal rigidity of the surface, has good
toughness and good strength of the internal, and has good laser cladding effect.