Why the steels are widely used in our society? How important the steels are to achieve a safe, reliable and sustainable society? How much the steels are produced? How the steels are produced? The key points to answer these questions are within the steels. This course, “Ferrous Materials I”, gives you the basics and principles of the physical metallurgy of iron and steels. The course, “Ferrous Materials II”, which is linked to this course, provides you opportunities to understand how the steels are produced based on the principles. Students will learn unique characteristics of iron and steels to produce a variety of properties that you want to give through studies on the basis of metallurgy such as phase diagram and phase transformation.
Students will be able to:
1) Understand iron-carbon equilibrium phase diagrams, phase transformations in plain carbon steels and normalized microstructures formed through the phase transformations.
2) Understand the effects of alloying elements on the equilibrium phase diagrams, the phase transformations and microstructure evolutions in steels.
3) Understand the excellent heat treatability of steels to control microstructures, the microstructures being the decisive factor for the mechanical properties of steels, and these points making it possible to use the steels in a variety of applications.
Phase diagram, phase transformation, crystal structure, normalized microstructure, time-temperature-transformation diagram, continuous-cooling-transformation diagram, martensitic transformation, bainitic transformation, the tempering of martensite, The effect of alloying elements
|Intercultural skills||Communication skills||Specialist skills||Critical thinking skills||Practical and/or problem-solving skills|
Students are recommended to study the part of each lecture in advance.
Questionnaires will be given in each lecture to assist your understanding.
|Course schedule||Required learning|
|Class 1||Steel inductry in Japan and in the world, iron/steel making process||Understand the status of steel inductry in Japan and in the world and steelmaking process.|
|Class 2||Characteristics of steels, mystery of pure iron||Learn why steels are widely used, unique phase transformations in steels and their crystal stuctures.|
|Class 3||Fe-C binary equilibrium diagrams||Understand the iron-cementite and iron-graphite equilibrium diagrams.|
|Class 4||The normalized microstructures and their formation sequence in steels||Understand the normalized microstructures and their formation sequence in steels|
|Class 5||Time-temperature-transformation (TTT) diagram||Understand Time-temperature-transformation (TTT) diagram and learn how to construct it.|
|Class 6||Continuous-cooling-transformation (CCT) diagram||Understand Continuous-cooling-transformation (CCT) diagram and learn how to construct it.|
|Class 7||Martensitic transformation and bainitic transformation||Learn the microstructural and crystallographic characteristics of martensitic transformation and bainitic transformation.|
|Class 8||Retained austenite and the tempering of martensite||Learn retained austenite and microstructure evolution during the tempering of martensite|
|Class 9||Midterm exercize||Midterm exercize|
|Class 10||Phase diagrams in alloy steels||Understand the effects of alloying elements on iron based phase diagrams.|
|Class 11||Phase transformations (TTT, CCT) in alloy steels||Understand the effects of alloying elements on phase transformations in steels.|
|Class 12||The tempering of martensite and the formation of carbides in alloy steels||Understand the effects of alloying elements on microstructure evolution during the tempering of martensite in steels.|
|Class 13||Microstructure control of steels||Learn the methods of microstructure control (strengthening mechanisms) in steels.|
|Class 14||Microstructural design in steels||Learn how to design microstructures in steels.|
|Class 15||Use and applications of steels, general discussion||Learn use and applications of steels.|
講座・現代の金属学 材料編４ 『鉄鋼材料』 日本金属学会
谷野満，鈴木茂著 『鉄鋼材料の科学』 内田老鶴圃
Questionnaires and midterm excersize: 50%
Final examination: 50%