Exam Question
Explain EACH of the following metallurgical processes:
(a) Induction hardening
(5)
(b) Nitriding
(6)
(c) Case hardening
(5)
Class 2 (2nd Engineer)
MEKG
📅 Feb 2026
Reference Answer
### (a) Induction Hardening (5 Marks)
**1. Concept:**
Induction hardening is a surface heat treatment process used to increase the wear resistance, surface hardness, and fatigue life of steel components without affecting the core properties. It utilizes electromagnetic induction to generate localized heat on the surface, followed by immediate quenching. This creates a hard outer layer (case) of martensite, while the core remains relatively soft, tough, and ductile.
**2. Process:**
**1. Concept:**
Induction hardening is a surface heat treatment process used to increase the wear resistance, surface hardness, and fatigue life of steel components without affecting the core properties. It utilizes electromagnetic induction to generate localized heat on the surface, followed by immediate quenching. This creates a hard outer layer (case) of martensite, while the core remains relatively soft, tough, and ductile.
**2. Process:**
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