The residual compressive stresses and dimensional changes related to the lattice strains of retained austenite (RA) phase in a high-Si, medium-carbon steel (Fe-0.53C-1.67Si-0.72Mn-0.12Cr) are investigated for samples austenitized quenched isothermal bainitic transformation (Q&B) range 5 s 1 h at 350 °C. Also, directly water (DWQ) from austenitization temperature comparison with Q&B samples. Fie...

In the current research, a complex microstructure and crystallographic data were developed through quenching partitioning (Q&P) process to improve tensile properties of commercial pearlitic carbon-silicon steel. Two-stage Q&P process, including full austenitization, at 220 °C, followed by two different temperatures, was applied as-received specimen generate composed tempered martensite, bainite...

Abstract This paper describes the development and characterisation of bainitic steel for rail applications based on carbide-free, low-alloy steel. The results show that after rolling subsequently cooling, designed carbide-free exhibits better mechanical performance than standard pearlitic is because its fine, microstructure, which consists ferrite retained austenite laths. Microstructural prope...

Seamless pipes are usually quenched and tempered after manufacture in order to obtain the desired properties. The possibility of avoiding this heat treatment is explored here, by designing steels which transform into an carbide free bainitic microstructure during cooling from the hot processing phase of the pipe. The cooling conditions studied are appropriate for the manufacturing process and c...

Abstract Thermomechanical processing consisted of hot-rolling in the austenitic region with deformation both above and below non-recrystallization temperature. Immediately after rolling, specimens were directly quenched water to three different temperatures 560 °C, 420 °C room The first two samples, which 560° C 420°C, immediately cooled slowly furnace. microstructure samples mostly comprised u...

In this study, the correlation between HAZ microstructure and low temperature impact toughness of bainitic steel plates was investigated. The Steel with high carbon content finish cooling has a higher volume fraction large packet size granular bainite compared to temperature. room tensile properties two steels are similar, mostly because is composed acicular ferrite having fine grains. On other...