Intro -- Thin Slab Direct Rolling of Microalloyed Steel -- Preface -- Table of Contents -- Table of Contents -- 1. Introduction -- 1.1. Different Types of TSDR Industrial Routes -- 1.2. Economical and Ecological Benefits -- 1.3. Metallurgical Differences between Conventional Rolling and TSDR -- 1.4 Scope -- 2. Strength and Toughness: Relationships with Microstructure -- 2.1. Introduction -- 2.2. Strength (in Low Carbon Steels) -- 2.3. Toughness -- 2.4. Microstructural Homogeneity and Toughness (in the Ductile-Brittle Regime) -- 3. Microstructural Control during and after Hot Rolling -- 3.1. Microstructural Changes during Hot Working -- 3.2. Conventional Controlled Rolling -- 3.3. Recrystallisation Controlled Rolling. Effect of Titanium -- 3.4. Mean Flow Stress -- 3.5. Phase Transformation during Cooling. Precipitation Hardening -- 4. TSDR: Continuous Casting and Tunnel Furnace -- 4.1. Continuous Casting -- 4.2. Tunnel Furnace -- 5. TSDR: Rolling of Plain Carbon and Microalloyed Steels -- 5.1. As-Cast Austenite Refinement -- 5.2. Austenite Conditioning -- 5.3. Processing Maps -- 5.4. Optimisation of Rolling Schedules -- 5.3. Phase Transformation -- 6. Industrial Applications -- 6.1. Structural and HSLA Steels -- 6.2. Development of API Grades -- 6.3. Dual Phase Steels -- 6.4. Concluding Remarks -- 7. References.

Thin slab casting and direct rolling (TSDR) technologies are nowadays one of the most promising processing routes to maintain steel as a leading material in technological applications. Initially, this process was exclusively for the production of mild steels. As industrial experience and knowledge improved, a rapid expansion of the range of products took place with higher strength grades becoming an important part of the overall production. Actually, it is widely accepted as a route to produce high value grades and it can be considered as a technology which has reached a high degree of maturity. This book aims to provide an approach to the different metallurgical aspects involved in the application of thermomechanical treatments in the TSDR route.The work is divided into six chapters. After an overall introduction to the singularities of thin slab technologies, the main microstructural parameters controlling strength and toughness are described in Chapter 2. In Chapter 3 the microstructural changes affecting hot working are evaluated in the case of conventional routes, including different classical aspects related to the thermomechanical processing of microalloyed steels. The metallurgical aspects involved in the continuous casting of thin slabs, as well as the precipitation/dissolution phenomena of microalloying elements before hot rolling are considered in Chapter 4. In Chapter 5 the applications of the most important basic concepts detailed in Chapters 3 and 4 to the thermomechanical processing of microalloyed steels in TSDR technology are analysed. The final chapter is devoted to an overview of the main industrial applications of this technology.

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Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, 2018. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries.