N. Ratković, Faculty of Engineering, University of Kragujevac, Kragujevac, Serbia. R. Nikolić, Faculty of Civil Engineering, University of Žilina, Žilina, Slovakia. I. Samardžić, University of Osijek, Mechanical Engineering Faculty in Slavonski Brod, Croatia. Fundamental principles of friction welding of dissimilar steels (high speed and tempering steel) from the aspect of metallurgical and che...

Original scientific paper In this paper, the results of investigations of the temperature field distribution and tool wearing during C60 steel turning are presented. Abrasive wear resistance tests were carried out for cutters made of low-alloy high-speed steel. Steel samples were heat treated, and then were subjected to ion nitriding, TiN coating, or to complex treatment. The influence of cutti...

Quenching-partitioning-tempering (Q-P-T) heat treatment is a relatively novel approach to attain excellent ductility in high-strength steels. In the present work, microstructural evolution and mechanical properties of low carbon microalloyed advanced steel were systematically investigated after Q-P-T process. The was explored by employing X-ray diffraction, transmission electron microscopy scan...

To modify the rapid carburization and heat treatments of 18Cr2Ni4WA heavy-duty gears on coal-cutting machines, numerical modeling experimental investigations are carried out for understanding evolution microstructure properties. Through modeling, fractions austenite, bainite, martensite evaluated. The Vickers hardness distribution across hardening layer, calculated by Maynier equation, compares...

This study investigated the effect of postweld heat treatment (PWHT) conditions on Type IV failure behavior 10% Cr martensitic steel welds using Haynes 282 filler. The welded joints were subjected to PWHT at temperatures 688, 738, and 788 °C for 4 8 h. Creep tests carried out 600 under a stress 200 MPa. as-welded joint without showed cracking due growth voids around Laves phase by localized cre...

Boron steels are a group of that stand out with their high wear resistance and hardenability. In this study, 33MnCrB5-2 boron steel was shaped by applying hot forging process. After the process, microstructure examinations mechanical tests materials were carried out. A cryogenically treated at -80 °C for 2 hours. Then, different austenitized 890 quenched, then tempered 400 90 minutes. last mate...

fatigue behavior of a vanadium microalloy steel has been studied in this research. here, microstructure constituents were considered which essentially are dependent on the heat treatment conditions. the results of high cycle fatigue tests revealed that heat treatment procedure and cooling rates have significant effects on fatigue properties. optimal heat treatment cycle of the microalloyed stee...

This study investigated the effects of cryogenic treatment and tempering temperature applied after on mechanical microstructural properties AISI 431 martensitic stainless steel. After conventional heat (CHT), steel samples were cryogenically treated at -180 °C for 6 hours then tempered 200 (CT200) 300 (CT300) 2 hours. these processes, hardness measurement, tensile test, abrasion test carried ou...

Martensitic and bainitic steels are two types of widely used steels with excellent mechanical behaviors in automatic industry. It’s universally acknowledged that asquenched martensite possesses poor ductility and impact toughness, which should be tempered before putting into application. During tempering, as-quenched martensite changes from a hard and brittle microstructure to more ductile and ...

Breaking the strength-ductility paradox of very-low (≤0.05 wt.%)-C medium (3–12 wt.%)-Mn steels (MMnS) has been a hard-wired topic, since in these multi-step heat treatments are usually required to obtain austenite for improved ductility and precipitates higher strength. In this study, compact two-step treatment comprising short (2 min) annealing tempering was developed investigate synergetic e...