Process for forming cold formed high-loaded bearing steel parts

摘要

A process for forming a roller bearing comprising the steps of providing a cylindrical slug that comprises at least 0.7 weight percent carbon and up to 1.6 weight percent of at least one alloying element. The slug has lateral and side surfaces. A centered indentation is formed in each side surface. A circular chamfer surface is formed at the inter-section of each side and each lateral surface, thereby producing an upsetting slug. The upsetting slug is cold formed, thereby deepening the centered indentations and forming a blank. The blank has a web separating the deepended indentaions and end surfaces and chamfer surfaces that are substantially at net shape for the roller bearing. The web is removed from the blank, thereby forming a pierced blank having a through hole with an inner surface. The inner and lateral surfaces of the pierced blank are finished to the specified inner and outer diameters for the roller bearing.