INDIRA GANDHI INSTITUTE OF TECHNOLOGY

This lecture note provides a comprehensive overview of Heat Treatment Technology as part of the metallurgical engineering curriculum for the 5th semester. The primary objective is to impart essential knowledge on thermal processes that influence the properties of metals, especially focusing on the transformation phases of austenite and the various hardening techniques applicable to steel. Methodologically, the content is structured into 15 weeks, encompassing topics such as solid-state phase transformations, the mechanisms of austenite formation, decomposition processes, and different types of heat treatments including annealing, normalizing, and hardening methods. Throughout the material, various diagrams, such as the Continuous-Cooling Transformation (CCT) diagram, illustrate the practical applications and theoretical principles of heat treatment processes. Results indicate that understanding the impact of factors, such as grain size and alloying elements on hardenability, is crucial for effective metal treatment. The document serves as an academic resource for students to grasp the intricacies of heat treatment technology, ensuring they are well-prepared for further practical applications in metallurgical engineering.