SYMPOSIA PAPER Published: 28 November 2014
STP158020140061

Heat Treatment Process for Martensitic Stainless Steel Pyrowear 675 for Improved Corrosion Resistance

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High performance mechanical systems such as bearing and gears in advanced gas turbine engines are required to operate at ever increasing speeds, temperature, and loads. An advanced high temperature case hardened bearing steel, Pyrowear 675, has been developed for these applications. The basic mechanical properties and desired microstructure can be achieved by conventional carburizing techniques; however, corrosion resistance is not substantially better than conventional bearing steels like M50 and 440C. A new thermal process for Pyrowear 675 was developed that provided enhanced corrosion resistance, while maintaining required mechanical properties and microstructure. The thermally processed Pyrowear 675 was characterized for carbon and nitrogen content, corrosion resistance, microstructure, hardness, hot hardness, residual stress, retained austenite, and rolling contact fatigue life.

Author Information

Trivedi, Hitesh, K.
UES Inc, Dayton, OH, US
Otto, Frederick
MTV, Kenosha, WI, US
McCoy, Bryan
SKF Aeroengine NA, James Town, NY, US
Bhattacharya, Rabi, S.
UES Inc, Dayton, OH, US
Piazza, Timothy
SKF Aeroengine NA, James Town, NY, US
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Details
Developed by Committee: A01
Pages: 1–20
DOI: 10.1520/STP158020140061
ISBN-EB: 978-0-8031-7606-5
ISBN-13: 978-0-8031-7605-8