Question

In which of the following
methods, surface of a steel
component becomes hard due
to phase transformation
austenite to martensite?
​

Answer 1

Complete Question

In which of the following methods, the surface of a steel component becomes hard due to the phase transformation of austenite to martensite?  

A. Carbonitriding  

B. Flame hardening  

C. Induction hardening  

D. Cyaniding

The method for the steel component is Flame hardening.

• Flame hardening is a heat treatment process used to harden the surface of a steel component.
• Phase transformation of austenite to martensite is a process that occurs in certain types of steel when they are rapidly cooled or quenched.
• Austenite is a form of iron-carbon alloy that exists at high temperatures, and martensite is a very hard and brittle form of steel that forms when austenite is rapidly cooled.
• When steel is heated to a high temperature and then rapidly cooled, the austenite transforms into martensite, which gives the steel its hardness and strength
• This process causes the outer layer of the steel to become harder and more resistant to wear and tear, while the core remains relatively soft and ductile.

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