Workgroup Contents

Lecture 2.1 : Characteristics of Iron-Carbon Alloys

1. INTRODUCTION

1.1 Why Metallurgy For Civil and Structural Engineers?

1.2 The Scope of Lectures in Group 2

2. STRUCTURE AND COMPONENTS OF STEEL

2.1 Introduction

2.2 The Components of Steel

2.3 The Crystal Structure

3. IRON-CARBON PHASES

3.1 Influence of Temperature on Crystal Structure

3.2 Solution of Carbon in bcc and fcc Crystals

3.3 Nomenclature

3.4 The Iron-Carbon Phase Diagram

4. COOLING RATE

4.1 Cooling Rate During Austenite to Ferrite Transformation and Grain Size

4.2 Slowly Cooled Steels

4.2.1 Influence of carbon on the microstructure

4.2.2 The need for control of grain size

4.2.3 Grain size control by normalising

4.2.4 Microstructural changes accompanying hot rolling of steels

4.3 Rapidly Cooled Steels

4.3.1 Formation of martensite and bainite

4.3.2 Martensite in welded structures

4.3.3 Quenching and tempering

4.3.4 Control of martensite formation

5.1 Sulphur, Phosphorus and Other Impurities

5.2 Manganese in Structural Steels

6. CONCLUDING SUMMARY

8. ADDITIONAL READING