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-
- Resource Relation:
- Conference: Joint AIAA/SAE/ASME propulsion conference, Monterey, CA (United States), 28-30 Jun 1993
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of a carburizing stainless steel alloy
Rolling contact fatigue behavior of heat resistant bearing steels at high operational temperatures
Related Subjects
42 ENGINEERING
BEARINGS
CORROSION RESISTANCE
STAINLESS STEELS
RESIDUAL STRESSES
FRACTURE PROPERTIES
GAS TURBINE ENGINES
SERVICE LIFE
TEMPERATURE RANGE 0400-1000 K
ALLOYS
ENGINES
HEAT ENGINES
HIGH ALLOY STEELS
INTERNAL COMBUSTION ENGINES
IRON ALLOYS
IRON BASE ALLOYS
LIFETIME
MECHANICAL PROPERTIES
STEELS
STRESSES
TEMPERATURE RANGE
360103* - Metals & Alloys- Mechanical Properties
420200 - Engineering- Facilities
Equipment
& Techniques