The phase composition of nanobainitic steel 0.56–0.60%C, 1.68–1.95%Mn, 1.58–1.80%Si, 1.30–1.47%Cr, 0.57–0.75%Mo is described in this paper. controlled order to obtain diversified mechanical properties for specific applications, such as armor plates. effect temperature and time isothermal heat treatment on both the microstructure were determined. Dilatometric studies, well measurements volume fr...

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...

In this research, the 600 MPa acid resistant steel was used as flash butt welding base material, to study effect of different upset allowance on microstructure and mechanical properties joints. The results can be obtained follows: with increase allowance, it has a significant elongation, ferrite content in heat affected zone increases, joint strength first increases then slowly decreases. When ...

Carbide-free bainitic (CFB) steels with a matrix of ferrite and thin layers retained austenite, to reduce the manufacturing costs, usually do not contain alloying elements. However, few reports were presented regarding effect elements on properties these steels. Thus, this study evaluates effects vanadium rare earth (Ce-La) microalloying structure, phase transformation kinetics, mechanical carb...

A district heating system is an eco-friendly power generation facility with high energy efficiency. The boiler water wall tube used in the exposed to extremely harsh conditions, and unexpected fractures often occur during operation. In this study, a corrosion failure analysis of was performed elucidate mechanisms. study revealed that overheating by flames cause tube. With increase temperature l...

Herein, the diffusion and distribution of hydrogen (H) atoms in ferrite bainite contained an X80 pipeline steel is studied by both scanning Kelvin probe force microscopy finite-element modeling. The effect metallurgical microphases on H-atom accumulation analyzed. It showed results that H-charging elevates electrochemical dissolution activity steel, as indicated increased Volta potential thus d...

There is a novel range of steels under development, based on bainite forming at exceptionally low temperatures. The advantage of suppressing the transformation temperature is that incredibly fine platelets of bainitic ferrite are generated which are only 20–40 nm in thickness. This makes the steel strong and in combination with the austenite that is retained, gives a useful range of properties ...