The present study is concerned with the potential of high carbon, silicon steel grades isothermally transformed to bainite at low temperature (<300°C). first part gives an overview design principles, allowing very strength and ductility be achieved while minimising transformation duration. Wear fatigue properties are then investigated for over 10 variants such materials, manufactured in laboratory or industrially. results discussed against published data. Tensile strengths above 2 GPa...

It is not the first time that a consortium of steel makers, end users and scientists up with unique approaches developments in physical metallurgy steels. The present paper reveals scientific technological sharing common intrigue interest for microstructure, nanostructured bainite. Also known as low temperature bainite, its properties rely solely on scale miscrostructure obtained by heat treatment at (150–350°C). Careful design based phase transformation theory, some well facts necessary...

Sliding wear performance of carbide-free bainitic steel is significantly affected by microstructure. This investigation an attempt to find a correlation between microstructure and resistance compare the results with that conventional tempered martensitic Under predominantly adhesive conditions, highest amount retained austenite offers best resistance. mainly attributed more pronounced work hardening TRIP-effect austempered at higher temperature. Therefore, initial bulk hardness not only...

Reciprocating sliding wear tests were performed on TiAlN coating against 316L stainless steel and carbide-free bainitic at temperatures of 40, 400 800 °C. The results indicate that material transfer is more pronounced for the softer lower but °C, bainite exhibits relatively transfer. Friction coefficient increases when temperature increases. However, bainite, there a reduction in friction elevated temperatures. This can be attributed to formation an easily sheared iron oxide layer In case...

This study aims to understand the effects of toughness and hardness on two-body wear nanostructured carbide-free bainitic steels. For this purpose, three different steel grades were austempered at 250 °C obtain microstructures with mechanical properties. The properties determined in terms fracture hardness. tests carried-out loads two types abrasive papers. results show that a an optimum combination exhibits highest resistance. It has been seen is not only parameter determining resistance...

The aim of this work was to investigate the microstructure and mechanical properties laser-welded joints combined Dual Phase DP800 DP1000 high strength thin steel sheets. Microstructural hardness measurements as well tensile fatigue tests have been carried out. welded (WJ) comprised similar/dissimilar steels with thickness were consisted different zones exhibited similar microstructural characteristics. trend microhardness for all WJs consistent, characterized by highest value at hardening...

Herein, the influence of ultrasonic treatment (UST) on microstructure AISI‐304 and AISI‐316 stainless steels as two common commercial grades with similar properties but different levels stacking fault energy (SFE) is compared. The softening effect wave predeformed structure demonstrated by microhardness measurements, relaxation tensile residual stresses affirmed through X‐ray diffraction (XRD) peak shifting. Electron optical microscopy reveals a significant impact ultrasound reduction...

Carbon partitioning from martensite to austenite is essential for stabilization during quenching and (Q&P), while a few competitive phenomena, such as bainitic transformation carbide precipitation, alter the microstructural evolution. So, there need of using in-situ in combination with ex-situ characterisation techniques understand C at high temperature relation simultaneous phenomena that might occur stage. In this study, evolutions medium carbon steel ( 0.6C–1.6Si–1.25Mn–1.75Cr wt%) Q&P...

The Ni-TiO2 and Ni-CeO2 composite coatings with varying hydrophilic/hydrophobic characteristics were fabricated by the electrodeposition method from a tartrate electrolyte at ambient temperature. To meet requirements of tight regulation European Chemicals Agency classifying H3BO3 as substance very high concern, Rochelle salt was utilized buffer solution instead. novelty this study to implement simple one-step galvanostatic low-temperature based on greener compared traditionally used, aiming...

The ductility drop and decrease in strength that lead to crack formation during continuous casting of steel is typically investigated by means the hot test. In this study, tests are performed using a thermo-mechanical Gleeble system simulate deformation steels at high temperatures low rates similar those casting. Thus, temperature was varied between 600 1000°C while strain covered range from 0.001 0.1s−1. Tests carried out identify which susceptible as well effect rate. Characterization...

The findings in this work enhance the understanding of oxidation mechanisms and scale growth at high temperatures a strength low alloy (HSLA) steel for improving surface quality during continuous casting. phenomenon was investigated under dry air water vapor atmospheres by heating specimens 1000, 1100, 1200 °C different holding times. Temperature time had great effects on kinetics, where faster (i.e., parabolic) rates were present when compared with condition. strongly influenced number...

The wear resistance of carbide-free bainitic microstructures have recently shown to be excellent in sliding, sliding-rolling, and erosive-abrasive wear. Boron steels are often an economically favorable alternative for similar applications. In this study, the performance boron with different heat treatments was studied mining-related conditions. aim compare these study microstructural features affecting rates. condition simulated application oriented test method utilizing dry abrasive bed...

The in-situ X-ray diffraction observations of the bainitic transformation silicon alloyed steels were performed using high temperature technique. experimental results have shown that volume fraction and carbon content austenite remains a constant value which indicate is almost finished after early stages austempering transformation. Asymmetry peaks are obtained for samples at stage due to heterogeneous distribution in different regions thus exists two types austenite: low-carbon (γLC)...