ME8491 ENGINEERING METALLURGY - UNIT 2

1. ME 8491 ENGINEERING METALLURGY
M.KARTHIKEYAN
ASSISTANT PROFESSOR
DEPARTMENT OF MECHANICAL ENGINEERING
AAA COLLEGE OF ENGINEERING & TECHNOLOGY, SIVAKASI
karthikeyan@aaacet.ac.in

2. Definition – Full annealing, stress relief, recrystallisation
and spheroidising – normalising, hardening and
Tempering of steel. Isothermal transformation diagrams
– cooling curves superimposed on I.T. diagram CCR –
Hardenability, Jominy end quench test - Austempering,
martempering – case hardening, carburizing, Nitriding,
cyaniding, carbonitriding – Flame and Induction
hardening – Vacuum and Plasma hardening.
UNIT II HEAT TREATMENT

11. 1. Suggest various methods for improving the different properties of
steel like ductility, toughness, hardness, softness and grain size
refinement but without adding any alloying elements.
2. What is meant by Normalizing?
3. Brief on tempering, Austempering and Martempering processes
4. Brief on normalizing and hardening
5. Austempering is different from other hardening treatments – explain
the statement.
6. List the factors that affect hardenability of steels.
7. Differentiate annealing and normalizing treatments
QUESTIONS