The microstructure and microhardness of X70 pipeline steel were investigated after conducting different processing routes. was characterized using optical electron microscopy. Scanning microscopy equipped with backscattered diffraction (EBSD) transmission techniques applied for investigation thermal treatment conditions. Mechanical properties by a tester. results show that the mainly consists g...

High-cycle fatigue (HCF) behaviors of medium-carbon bainitic steels with various inclusion sizes and microstructural features were studied using the rotating–bending test. Here, different melting processes treated by three heat treatment routes incorporating bainite formation, namely bainite-based quenching plus partitioning (BQ&P), austempering (BAT) “disturbed austempering, DBAT”. The int...

transformation induced plasticity (trip) steels have a vast application in automotive industry because of theirhigh strength, high ductility and hence excellent energy absorption capacity. these characteristics of tripsteels are due to the existence of retained austenite in their microstructures in the ambient temperature, whichtransforms to the martensite phase during deformation. the microstr...

In the present paper, medium-C Si-rich steel with a quenched martensite microstructure was heated to intercritical annealing temperatures at 750 °C, 760 °C and 770 after warm rolling deformation obtain ferrite varying volume fractions. Subsequently, bainite/ferrite multiphase microstructures were attained via austempering near Ms temperature. The of test different heat treatments characterized ...

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...

M. Suliga, R. Kruzel, Czestochowa University of Technology, Faculty of Production Engineering and Materials Technology, Czestochowa, Poland In the paper the influence of modification of patenting process on steel cord properties has been assessed. It was found that the wires of pearlite structure, in comparison to the wires of pearlite-bainite structure, characterized much better properties whi...