High Fracture Toughness Bearing Development
Abstract
The purpose of this program is to perform fatigue life tests to compare the rolling contact performance of high energy beam surface hardened VIM-VAR M50 steel with conventionally through hardened VIM-VAR M50 steel. Two groups of 6009 size ball bearings were provided for life testing; one group containing conventionally through hardened VIM-VAR M50 steel rings, the other group containing electron beam (EB) surface hardened VIM-VAR M50 steel inner rings, and conventionally through hardened VIM-VAR M50 steel outer rings. Each group consists of twenty bearings. Rolling contact fatigue life testing was performed yielding L10 lives of 91 million revolutions for the conventionally through hardened bearings, and 151 million revolutions for the bearing group containing the EB surface hardened inner rings. These lives are consistent with the expected performance of VIM-VAR M50 steel as indicated by comparison with the calculated adjusted rating L10 of 62 million revolutions. The surface hardened bearing rings represent the first application of high energy beam heat treatment to high-speed-steel rolling bearing components.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1981
- Accession Number
- ADA113582
Entities
People
- N. J. Ninos
- R. E. Maurer