Microstructure of as-quenched 3.5NiCrMoV rotor steel. Part I. General structure and retained austenite

✍ Scribed by J. D. Gates; Dr. A. Atrens; I. O. Smith

• Book ID: 102945743
• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 867 KB
• Volume: 18
• Category: Article
• ISSN: 0933-5137
• DOI: 10.1002/mawe.19870180508

✦ Synopsis

The microstructural features have been examined for 3.5NiCrMoV steam turbine rotor steel, in the as-quenched state and tempered at 500 "C. Quenching produces lath martensite, with bands of retained austenite at the lath boundaries and, to a lesser extent, at prior austenite grain-boundaries. Autotempering occurs during the quench, result- ing in loss of tetragonality of the martensite and extensive carbide precipitation in the matrix and to a lesser degree at prior austenite grain boundaries, but not at lath boundaries. Tempering at 500 "C