Low-cost high-performance backing bearing inner ring new material and heat treatment process thereof

The invention discloses a novel low-cost high-performance backing bearing inner ring material and a heat treatment process thereof, and relates to the technical field of backing bearings, the novel low-cost high-performance backing bearing inner ring material comprises C, Si, Mn, P, S, Cr, Mo, W, N and Cr/C. The C is the most basic element in a backing bearing, and the content of the C determines the number of carbides, the relative number of M7C3 type carbides and total carbides, the hardness, the toughness, the hardenability of the material and the like. According to the ultra-high-strength ultra-thin silicon steel and the preparation method thereof, by designing material components, the obdurability of a base body is improved, and the rolling requirement of ultra-high-strength ultra-thin silicon steel of a silicon steel production line Meanwhile, a matched heat treatment process is adopted, so that the normal-temperature and high-temperature mechanical properties of the inner ring of the new-material backi