With the rapid development of railways towards high speed and larger carrying capacity, problem wear fatigue damage between wheel/rail is gradually becoming serious. However, traditional pearlite has reached limit, which leads to more attention developing a novel material. This study aims report carbide-free bainite wheel steel. The wear-resistance steel was tested by rolling-sliding experiment...

TRIP-assisted CMnSiAl steels with a fully martensitic initial microstructure have been studied in order to investigate the effect of partial substitution Si by Al. The steel was fabricated casting sand mold, hot forged, homogenizing, rolling, cold intercritical annealing, and finally, an isothermal bainitic treatment. During annealing at 1023 K (750 °C) for 420 s, matrix consisting 50% proeutec...

The effects of boron segregation and austenite grain size on the bainitic isothermal transformation a high-strength steel were studied independently. Dilatometry, microstructural observations previous atom probe tomography analyses showed that rate decreases with increasing excess at boundaries. We also found causes an unexpected effect: large grains transform faster than small ones. A kinetic ...

In this study, the effects of Mo and Nb on microstructure Charpy impact properties coarse-grain heat affected zone (CGHAZ) in high-strength low-alloy (HSLA) steels were investigated. The high-Mo steel had a lower volume fraction acicular ferrite (AF) higher granular bainite (GB) than those low steel. CGHAZ specimen AF GB compared to low-Mo specimen. This is because, an increase lowers transform...

This laboratory study aimed to reveal the inner connects between microstructure and corrosion properties of a RE microalloyed ultra-thin cast strip (UCS) steel. The mainly consisted homogeneous polygonal ferrite (PF) with small amount pearlite (P), while adding multiple alloying elements led appearance granular bainite (GB) bainitic (BF). strongly promoted homogenization refinement by segregati...

In the paper fundamentals of steel parts quench process in liquid media are considered which used for designing new technologies such as intensive quenching that results obtaining fine and nano – bainitic microstructure. These include French law transient nucleate boiling establishing during media, duration, when film is absent, self regulated thermal process. Based on listed fundamentals, vers...

Multi-barrier cleavage models consider fracture which is characterized by a series of microscale events. One the challenges for multi-barrier strong variations parameters across different types steels. The source and magnitude have not been studied systematically. In current paper, corresponding to initiation at hard particle crack propagation overcoming grain boundaries are determined three ba...