Conveners
Alloy Design & Microstructure Control
- Ettore Anelli (Franchini Acciai SpA)
Alloy Design & Microstructure Control
- LUIGI CHINAGLIA (FOMAS S.p.a.)
Description
4.1.1
Boron in steel might form boron nitrides and/or boron oxides. Hexagonal boron nitride is a solid lubricant and as a second phase in steel it improves machinability (tool lifetimes as well as chip breaking). In addition, boron in oxides lowers the melting point (or glass transition temperature). B2O3 is known as a low melting phase with similar properties than Pb inclusions. Unfortunately, the...
The bainite microstructure, transformation kinetics and tempering resistance have been studied as a function of carbon content from 0.61 to 0.99 wt. % in low alloy steels. The carbon content strongly affects the bainitic transformation kinetics and hardness which are both increased by increasing carbon content. The tempering resistance also varies depending on carbon content and a higher...
The quenching and partitioning (QP) process aims to achieve superior mechanical properties and enhanced toughness by developing a microstructure consisting of martensite and retained austenite. In this study, single-step (SS) QP treatments were applied to the commercial 30CrNiMo8 steel, a material widely used in industrial high-strength applications but not specifically engineered for this...
High-Strength Low-Alloy (HSLA) steels are widely used in structural applications, requiring a thorough microstructural analysis to optimize the strength and toughness of welded joints. During multi-pass welding, thermal cycling leads to the formation of a complex Heat-Affected Zone (HAZ), consisting of sub-regions with diverse microstructural constituents, including brittle phases that...
One of the most promising groups of steels for future forging applications are medium-manganese (medium-Mn) steels, which develop finely dispersed retained austenite (RA) during the quenching and partitioning (Q&P) heat treatment process.
RA between the martensitic laths significantly improves ductility and fracture resistance by impeding the propagation of microcracks through...
Customers are more and more demanding for fine and homogeneous grain sizes in hot-rolled bars and wire rods dedicated to technical applications such as aeronautics, medical or watch-making. To assess those requirements, UGITECH is interested in using recrystallization models to better understand and predict the effects of both process parameters (like temperature, strain and strain rate) and...
The study focuses on the study of the static recrystallization and texture evolution of an electrical steel annealed at three different temperatures for sub-minute soaking time. The objective is to determine the optimal time-temperature parameters that promote the development of favourable crystallographic textures for magnetic properties while minimizing annealing time. Microstructural...