High temperature corrosion resistant bearing steel development
The aim towards increased power-to-weight ratios and reduced specific fuel consumption in advanced gas turbine engines demands mainshaft bearings that are able to operate under an increasingly severe environment. This environment includes higher temperatures, increased hoop stresses, and more rapid accumulation of stress cycles. In addition, corrosion currently accounts for approximately 30 percent of all bearing rejections during engine overhaul. To meet these challenges, a high-speed, high-temperature, corrosion-resistant bearing material is being developed. A production capable carburizing process for a newly developed chrome tool steel, Pyrowear 675 Alloy, was developed. Mechanical property evaluations have shown that carburized Pyrowear 675 has the required fracture toughness, rolling contact fatigue life, hot hardness, and corrosion resistance needed to operate in the rigorous environments predicted for gas turbine engines. 13 refs.
- OSTI ID:
- 5874989
- Report Number(s):
- AIAA-Paper--93-2000; CONF-930633--
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360103* -- Metals & Alloys-- Mechanical Properties
42 ENGINEERING
420200 -- Engineering-- Facilities
Equipment
& Techniques
ALLOYS
BEARINGS
CORROSION RESISTANCE
ENGINES
FRACTURE PROPERTIES
GAS TURBINE ENGINES
HEAT ENGINES
HIGH ALLOY STEELS
INTERNAL COMBUSTION ENGINES
IRON ALLOYS
IRON BASE ALLOYS
LIFETIME
MECHANICAL PROPERTIES
RESIDUAL STRESSES
SERVICE LIFE
STAINLESS STEELS
STEELS
STRESSES
TEMPERATURE RANGE
TEMPERATURE RANGE 0400-1000 K