Ultra-high strength steels (UHSS) have a determining role in construction and industry. Furthermore, welding as the primary joining process for steel has similar promoting its applications. Therefore, welded UHSS vital related However, due to their complex microstructures, these are more prone harmful effects of heat input on mechanical properties compared mild steels. Thus, identifying correla...

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 ...

The comparative study of submerged arc welding (SAW) and laser hybrid (LHW) was carried out for a 690 MPa high strength steel with thickness 20 mm. Microstructure ductile–brittle transition temperature (DBTT) evolution in welded zone were elucidated from the aspect crystallographic structure, particularly, digitization visualization 24 variants. impact toughness each micro LHW joint is better t...

The boron-free S700MC steel is usually produced by exploiting the properties of a ferrite-bainite mixed microstructure formed coiling strips at temperature about 450?C, i.e.below bainite starting temperature. With aim further enhancing mechanical 6 to 10 mm thick strips, industrial tests were carried out 600?C promote formation structure ferrite and carbides, which also acceptable for this type...

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...