Effects of Nb on Martensite Size in B-Bearing Steel

Yu Zhang; Hong Guan; Zhi Guo Gao

doi:10.4028/www.scientific.net/AMR.750-752.393

Paper Titles

Physical Simulation of Inclusions Removal in 180t RH Degasser
p.375

Phase Transformation Behaviors of Nb-V-Ti Microalloyed Pipeline Steel X70
p.380

Study on Process of SPHC Steel Solidification
p.385

Effect of Temperature on Tribological Performances of Ion Nitrocarburized Layer of 42MnCr52 Steel
p.389

Effects of Nb on Martensite Size in B-Bearing Steel
p.393

Study on the Preparation of Carbon-Containing Pellets from the Mixed Ore of V-Ti Iron Concentrate and Titanium Concentrate
p.396

Study on Mixing Time in Bottom-Blowing Ladle with Immersed Tube
p.400

Cold Model Experiments and Mechanism on Inclusion Removal by Ultrasonic Horn
p.404

The Latest Development on the Heat Treatment, Microstructure and Mechanical Properties of Low-Carbon Martensite Steel
p.408

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Effects of Nb on Martensite Size in B-Bearing Steel

Abstract:

The research about effects of Nb on martensite size and mechanics in B-bearing steel was completed. The results show that both steels have similar martensite due to high hardenability of B element which is responsible for high mechanical properties. However, there are differences in the microstructures between A steel (Nb-containing steel) and the B steel (Ti-containing steel). Microstructural observation of the quenched specimen shows that the formation of fine martensite is dominant in the A Steel than B steel due to Nb element. Martensite size in B-bearing steel was refined by Nb element for high fatigue property and toughness.