Question

Which of the following is not applicable for nitriding process?

(a) Surface formed is extremely hard

(b) Minimized cracking and distortion

(c) Expensive

(d) High-temperature treatment

This question was addressed to me by my school principal while I was bunking the class.

I'm obligated to ask this question of Nitriding, Cyaniding and Carbonitriding topic in section Heat Treatment of Engineering Material & Metallurgy

Answer 1

Correct answer is (d) High-temperature treatment

The explanation is: Nitriding has an edge over case-hardening as the surface formed is extremely hard. The treatment is conducted at comparatively low temperatures due to which the cracking and distortion effects are minimized. Nitriding is generally an expensive process. However, it may be cheaper when a large number of components are to be treated.