Question

What is the case depth obtained in the cyaniding process?

(a) 0.38 mm

(b) 0.25 mm

(c) 0.5 mm

(d) 1.25 mm

The question was asked in a national level competition.

I need to ask this question from Nitriding, Cyaniding and Carbonitriding topic in chapter Heat Treatment of Engineering Material & Metallurgy

Answer 1

Right choice is (b) 0.25 mm

Explanation: Of all the diffusion surface hardening methods, carburizing provides the highest cast depth of 1.38 mm. This is followed by carbonitriding, nitriding, and cyaniding at 0.5 mm, 0.38 mm, and 0.25 mm correspondingly.