Rolling bearing component

Abstract

Thin walled roller bearing component is produced from a cold strip made from a tempered steel having a tensile strength of not more than 480 N / mm 2>, a breaking elongation of at least 24%, an apparent yielding point of not more than 380 N / mm 2> and an anisotropic value R of 0.85-1.05 with delta Rmax = 0.3 mm. The cold worked roller bearing component has a surface hardness of at least 700 HV and a core hardness of no more than 650 HV.

Description

technical field [0001] The invention relates to a chip-free thin-walled rolling bearing component, such as a rolling bearing ring, a pin bushing or a needle bushing, produced from cold-rolled strip. Background technique [0002] Cold-rolled strip is often used to manufacture cold-worked products. Due to the increased requirements for application and use characteristics, better mechanical characteristics, especially molding characteristics, are required. Good formability is characterized by the highest possible r-values ​​for deep-drawability, high n-values ​​for stretchability and high elongation values ​​for planar elongational deformation properties. In this case it has proven to be advantageous if the shaping properties in the different directions, in particular in the longitudinal, transverse and diagonal directions, are as uniform as possible, ie largely isotropic. The advantage of the isotropic behavior is an essentially uniform flow of the substance and a reduction ...

AI Technical Summary

Problems solved by technology

But this induction annealing process is laborious and therefore expensive, and affects the accuracy of the overall size and shape, as well as cracks in the beading area

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