Bearing ring is the important ring-shaped work pieces of the rolling bearing with one or several raceway, its weight generally accounts for 60 ~ 70% of bearing gross weight, collar blank has forging, cold-extruded part, warm extrusion part, materials in the tube and bar etc., and wherein forging accounts for about 85% of collar blank sum.The internal soundness of lasso comprises the density of material, metallic fiber streamline distribution, grain size and thermomechanical treatment etc., larger impact is had on bearing life, so the quality of collar blank quality, the height of productivity ratio, produces important impact by the economic benefit of the quality on bearing products, performance, life-span and enterprise.Bearing ring belongs to thin-walled ring forgings, easily occurs wall unevenness, the problem such as folding, oval in forging process, thus causes bearing accuracy inadequate, affects the service life of bearing.