JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Course Objective

This course is mainly focused to develop knowledge among the students about the basic practices and process variables of heat treatment. Thermo-mechanical treatment, surface hardening techniques, heat treatment of steels, non ferrous alloys

Course Outcome

end of the course student is in a position to, know how to approach the

problem of choosing an alloy for a particular application and know how to approach the design of a heat treatment for an alloy for a particular application.

UNIT - I

Annealing, Normalizing, Hardening, Mechanism of heat removal during quenching, quenching media, sixe and mass effect, Tempering and its stages

UNIT - II

Time Temperature Transformation (TTT) and CCT Curves, effect of cooling on transformation of Austenitic, perarlitic, bainite, and martensite.

UNIT - III

Effect of alloying elements on Fe-C system and TTT curves, Hardenability of Steels, Factors affecting and its determination

UNIT - IV

Thermo-mechanical treatments, Austempering, Martempering, Patenting, Spheoridizing, Ausforming strain tempers, Subzero treatment, Isoforming, Cryoforming

UNIT - V

Surface Hardenting: Carburizing, Nitriding, Cyaniding, Carbonitiriding, Induction and Flame Hardening. Heat treatment of Cast Irons, Carbon Steels and Alloy Steels, Maraging Steels, and Al- Alloys

TEXT BOOK:

• 1. Heat Treatment Principle and Techniques - Rajan & Sharma
• 2. Heat Treatment of Metals – Zakharov, Mir Publishers, Moscow

REFERENCES:

• 1. Engineering Physical Metallurgy and Heat Treatment by Yu. Lakhtin
• 2. Physical Metallurgy Principles – Reza Abbaschian, Lara Abbaschian and Robert E. Reed-Hill. R16 B.TECH METALLURGY AND MATERIALS ENGG.