超细晶钢

作者简介

《超细晶钢(英文版)》主要内容：Ultra-Fine Grained Steels discusses results of the New Generation Iron and Steel ,Materials research project funded over the last ten years. Modern sustainability requirements want that iron and steel must meet tour conditions:stronger, longer service life, leading-edge manufacturing technology (low cost, material and energy efficient), and environmentally sound (waste recycling, reduced carbon dioxide emission). Therefore, new generation iron and steel materials featuring “double strength and double service life” are needed (labeled “ultra steels” in Japan).

书籍目录

1  Overview  1.1  The Technology of Controlled Rolling and Controlled Cooling  1.2  g & D Program of "Super Steels" and "New Generation Steel Materials"  1.3  The Formation of Ultra-fine Grains and Microstructural Refinement of Steels-Core Technique for the R & D of New Generation Steel Materials  1.4  Theory and Technology on Ultra-fine Grains    1.4.1  The state change and microstructure refinement of austenite during hot deformation    1.4.2  Deformation induced ferrite transformation      1.4.2.1  Thermodynamic consideration of deformation induced ferrite transformation      1.4.2.2  DIFT phase transformation and characters of transformed products    1.4.3  Deformation induced precipitation and medium temperature phase transformation control    1.4.4  The influence of nanometer size precipitates on ultra fine grain steel    1.4.5  Ultra grain refinement of alloy structural steels and the way of increasing the resistance against delayed fracturing    1.4.6  The development of carbide-free bainite/martensite multiple phase steels  1.5  Several Key Technologies Concerning the Development of Ultra Fine Grain Steels    1.5.1  Steel cleanness    1.5.2  Refinement and homogenization of solidification structure    1.5.3  Brief introduction of welding technique and economy of ultra fine grain steels  References2  Refinement of Austenitie Microstrueture and Its Influence on γα→ Transformation  2.1  Thermomechanical Control Process and Refinement of Austenitic Microstructure    2.1.1  Rolling at the austenite-recrystallization temperature region (RARTR)      2.1.1.1  Metadynamic recrystallization      2.1.1.2  Static recrystallization    2.1.2  Rolling in austenite non-recrystallization temperature region    2.1.3  Rolling at the under-cooled austenite    2.1.4  Accelerated cooling and microstructural refinement  2.2  Influence of Austenitic Recrystallization on Subsequently Transformed Grain Size    2.2.1  Influence of recrystallized or deformed austenite on ferrite transformation      2.2.1.1  Influence of recrystallized austenite on ferrite transformation      2.2.1.2  Influence of partially recrystallized austenite on ferrite transformation      2.2.1.3  Influence of non-recrystallized austenite on ferrite transformation    2.2.2  Influence of recrystallization in the austenite on DIFT   References3  Deformation Induced Ferrite Transformation  3.1  Introduction  3.2  Experimental Confirmation and Study Method of DIFT    3.2.1  Microstructure observation on the quenched sample    3.2.2  Mechanical behavior measurement    3.2.3  Dilatometry measurement    3.2.4  In-situ X-ray diffraction  3.3  Thermodynamics of DIFT    3.3.1  Deformation stored energy    3.3.2  Transformation driving force    3.3.3  Ad3 versus deformation stored energy  3.4  Kinetics of DIFT    3.4.1  Microstructural evolution and nucleation sites    3.4.2  Transformation fraction versus strain  ……

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《超细晶钢:钢的组织细化理论与控制技术(英文版)》由冶金工业出版社出版。

前言

This book is composed of ten chapters. Based on systematic description of research achievements of the project of ultra-fine grain steels and the irengineering applications, new theories of microstructural refinement and the newly developed technologies in production of high strength and high toughnesssteels are introduced. The book features the integration of materials science with engineering technology. In the scope of theories of the strengthening and toughening of ultra-fine grain steels, the theory of deformation induced ferrite transformation （DIFT） for ferrite-pearlite steels has been put forward. The phenomenon of ultra-fine grain refinement effect by the existing precipitates of nanometer size in the steel produced by using thin slab casting and rolling （TSCR）has been discovered and analyzed. The theory of deformation inducedprecipitation and medium temperature phase transformation control for bainiticsteels has been proposed. The theory of resistance against delayed fracturing of high strength and high toughness alloy structural steels has been established.   In the aspect of production technologies, some production technologies forobtaining ultra-fine grains and high strength high toughness of steels are introduced.

章节摘录

插图：When entering the 1990s, increasingly serious competition was waged among various structural materials. Engineering plastic materials were increasingly applied for longitudinal structures subject to not very high loading. Audi car made of whole aluminum structure did appear in Europe posing threat to cars made of steel structure due to its self-weight reduction, reducing oil-consumption, and alleviation of gas emission. IISI （International Iron & Steel Institute） organized 35steel companies from North America and Europe to jointly start a project on the development of "Ultra Light Steel Auto Body". In the project, it is required that strength level of auto body structure should be increased by 80%, the weight of auto body be reduced by 25%, Oil consumption of family car be reduced to3L/100 km, and the amount of CO2 emission reduced by 2%-3%. The development of high strength automotive sheet steels and longitudinal beam steels and the development of high strength and high toughness sheet steels will increase the competitiveness of steel materials against other engineering materials. The project certainly is an important project contributing to continuous optimization of air environment.

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