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Meeting Materials Science & Technology 2019
Symposium Thermomechanical Processing in Shaping and Forming of Steels
Presentation Title Effect of Vanadium and Aluminum Grain Refining Treatment on Steel Machinability
Author(s) Xueliang Zhang, Simon N. Lekakh, Ronald J. O'Malley, Eduardo Scheid, Mark Emmendorfer, Mike Fox
On-Site Speaker (Planned) Ronald J. O'Malley
Abstract Scope The effects of vanadium and aluminum grain refining treatment on the machinability of hot rolled plain carbon and 4140 steels were investigated using the critical tool wear method during bar turning. The flank wear on the machining tool was measured using an SEM for improved measurement accuracy. The microstructure and non-metallic inclusions in both the steel bars and machining chips were characterized using optical microscopy, micro-hardness measurements, SEM-EDS microscopy and automated inclusion analysis. Worn machining tools were also analyzed to characterize deposits found on the tool after machining. The investigation showed that aluminum treated steels exhibit better machinability than vanadium treated steels in both plain carbon and 4140 steel grades. High resolution TEM analysis provided additional information about inclusion/matrix boundary in severely deformed chips. The combined effects of hardness, microstructure and precipitates on steel machinability are presented and discussed.


Characterizing Longitudinal Defects in Steel Continuous Casting
Deformation Behavior of Non-metallic Inclusions during the Hot Torsion Process of Carbon Steel
Effect of Thermomechanical Strategy and Mo-Nb-B Alloying Additions on High Strength Medium Carbon Q/Q&T Steels
Effect of Vanadium and Aluminum Grain Refining Treatment on Steel Machinability
Effects of Thermomechanical Processing, Microalloying, and Rapid Heat Treatment on Microstructural Development, Carbonitride Precipitation, and Mechanical Behavior of Medium Carbon Steels
Evolution of Inclusions in Solid Steel during Reheating Process
Ferrite and Bainite Transformation from Austenite Grain Boundary in 0.6 wt.% C Steel
Formation of Polygonized Structures and Nuclear Recrystallization under Controlled Rolling of Low-carbon Steels
Some Aspects of Industrial Thermomechanical Processing of Steels
Yield Strength Improvement in 3rd Generation AHSS Through Warm Rolling

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