Rolling steel

Rolling steel is used in the manufacture of rolling bearings rolling elements and the inner and outer rings of steel, commonly used in the quenched state. Rolling in the work required to withstand high alternating loads, rolling contact stress between the inner and outer rings with large, while working in the lubricant medium. Therefore, bearing steel has high compressive strength and fatigue strength, a certain toughness, the internal organization of plastic, wear resistance and corrosion resistance of steel, uniform composition, heat treatment has good dimensional stability. Rolling steel is commonly used in the carbon from 0.95% to 1.10%, a low-carbon chromium bearing steel containing chromium 0.40 percent to 1.60 percent, as GCr6, GCr9, GCr15 and so on.

To meet the bearings under different working conditions of use requirements, but also the development of special-purpose steel bearings, rolling mill bearings manufacturing impact resistant carburizing bearing steel, aviation engine bearings used in high-temperature bearing steel and corrosion medium stainless steel bearings.

Heat treatment process and heat treatment of GCr15 bearing steel

Ball or softening annealing. The purpose is to reduce the hardness, uniform structure, improved cutting performance, prepare quenching. Mainly applied to carbon tool steel, alloy spring steel, bearing steel and alloy tool steel and steel eutectoid eutectoid steel (carbon content greater than 0.77%).

What made bearing steel bearings

1, lower billet, 2, forging, stamping (outer, inner) 3, vehicle processing (outer, inner) 4, 5 heat treatment, grinding (outer, inner ring shaped)