The control of formation nonmetallic inclusion and the characterization present basis improvement steel product properties lead to sustainable development in design new grades. In order produce steels with better machinability, such as AISI 303 grades, a modification inclusions carefully designed chemical composition is presented. Sulphur by creating sulphide reduces friction cutting resistance...

Abstract Lath martensite substructures in as-quenched plain carbon steels exhibit dislocation-like contrast the transmission electron microscope. More recent observations reported internal twins and nanoscale auto-tempered intra-lath carbides as additional lath ultra-low-C binary Fe–C steels. Modern microalloyed often have similar ultra-low C contents besides microalloying elements like Ti, Nb ...

Introduction/purpose: During exploitation tests of gasoline storage tanks, cracks can form in an austenitic-ferrite welded joint, which compromise the entire tank. Methods: In order to obtain a joint satisfactory strength and durability, paper analyzes influence heat input on tensile characteristics joints. current literature practice, additional materials for welding tank elements are selected...

The effect of different austenite grain size and different cooling rates on the austenite to ferrite transformation temperature and different ferrite morphologies in one Nb-microalloyed (HSLA) steel has been investigated. Three different austenite grain sizes were selected and cooled at two different cooling rates for obtaining austenite to ferrite transformation temperature. Moreover, samples ...

One of the most promising ways to produce a grain-refined microstructure in some steel materials is the thermomechanical processing route of subcritical recrystallization annealing of a cold-deformed martensite structure. In the present study, the microstructural evolutions and the associated recrystallization kinetics under various subcritical annealing heat treatment conditions are explored i...

strain induced precipitation in hsla-100 steel was investigated by conducting hotcompression and relaxation tests at temperature range of 850°c to 1100°c and strain rate of 0.001s-1 to 1s-1. the absence of dynamic recrystallization at temperatures below 1000°c was attributedto the influence of dynamic precipitation. the stress relaxation tests showed that strain inducedprecipitation is possible...

The initial austenite grain size of boron microalloyed steel with three different amounts of boron (20, 40, and 60 ppm) was investigated under different heating temperatures (1150, 1100, and 1050 °C), and hot compression tests of samples in a wide range of temperature (900–1100 °C) and strain rate (0.1–10 s−1) were conducted. It was found that the initial austenite grain size increases with inc...