Evaluation of Powder Processed Turbine Engine Ball Bearings.
Abstract
Work under this contract has demonstrated that powder processed bearing steels can be prepared to cleanliness standards consistent with the quality attainable in conventionally vacuum melted bearing steels, and that these alloys can be heat treated and processed into balls of aircraft quality. Rolling contact fatigue testing of three powder processed alloys in laboratory test devices has been completed and results revealed that an experimental alloy, EX00007, essentially a stainless steel composition, exhibited a fatigue life that was 2.2 times greater than that obtained in tests of powder processed M-50 alloy and 1.8 times the life observed for similar tests of VIM-VAR M-50 steel. On the basis of this performance, a recommendation has been made that a sufficient quantity of powder processed EX00007 alloy be procured for fabrication into aircraft gas turbine mainshaft bearings for subsequent endurance testing. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1977
- Accession Number
- ADA046695
Entities
People
- J. R. Potts
- P. F. Brown
Organizations
- Pratt & Whitney