Bearing heat treatment includes: normalizing, annealing, quenching and tempering, cold treatment, tempering, quenching, and accessory tempering.
Jiushang Bearing's produced precision miniature deep - groove ball bearings generally undergo heat treatment processes such as quenching and tempering, tempering stabilization, and surface quenching to improve the internal structure; the hardness after quenching and tempering is generally HB229 - 269; the surface quenching hardness is generally HRC56 - 62°; they are generally suitable for precision miniature deep - groove ball bearings.
Jiushang Bearing's bearing steel heat treatment includes: annealing and quenching. The hardness of the bearing steel after quenching is HRC60 - 65°; it is generally applicable to miniature deep - groove ball bearings.