|About this Abstract
||Materials Science & Technology 2012
||Steel Product Metallurgy and Applications
||Mechanical Properties of a Vanadium Microalloyed Air-Cooled Forging Steel with Various Aluminum Additions
||Lee Rothleutner, Chester J. Van Tyne
|On-Site Speaker (Planned)
The interaction of vanadium, aluminum, and nitrogen was investigated during simulated reheat cycles for forging in a commercial (38MnSiVS5) vanadium microalloyed medium-carbon bar steel with three aluminum levels (0.006, 0.020, and 0.031 wt pct). Laboratory thermal simulations with varied hold temperatures (1100 to 1250 °C) and hold times (5 or 45 min) while maintaining constant heating and cooling rates were used to study the interaction of various components. Tensile testing was used to determine properties after the thermal simulations. The contribution to precipitation strengthening appears to be on the order of 70 to 150 MPa for all conditions tested except for one—the 45 min hold at 1100 °C—where the aluminum reacted with the nitrogen to form AlN and greatly diminished the strength increase from the vanadium precipitates.
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