1)a)Sketch neatly the ideal Iron-Iron carbide phase diagram, showing all the temperature points, composition and phases.

b) describe the following heat treatment defects.

i) Soft spots

ii) Decarburization

2)a) With heat treatment cycle describe the following thermomechanical treatments.

i) Thermomechanical annealing

ii) Ausforming

b) With heat treatment cycle describe Subzero treatment.

3)a) With heat treatment cycle describe the post carburizing treatment of steel.

b) With heat treatment cycle describe the heat treatment of 18-4-1 HSS.

4)a) describe the following heat treatment processes

i) Nitriding ii) Induction hardening.

b) describe the steps associated with the transformation of austenite into pearlite for eutectoid steel.

5)a) describe

i) Homogenising and

ii) Austempering.

b) prepare the significance of hardenability. Also describe the standard test for the hardenability of alloy steel.

6) prepare short notes on any FOUR of the following:

i) Valve steel

ii) Ferrite stabilizers

iii) Malleable iron

iv) Copper alloys

v) Martensite