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Cyaniding is carried out at a temperature of ___________

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Cyaniding is carried out at a temperature of ___________

(a) 175^oC

(b) 500^oC

(c) 950^oC

(d) 1300^oC

I had been asked this question in unit test.

Question is from Nitriding, Cyaniding and Carbonitriding in chapter Heat Treatment of Engineering Material & Metallurgy

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Correct option is (c) 950^oC

Explanation: Cyaniding is a process of hardening the surface of steel components through the addition of nitrogen and carbon. It is done by immersing the workpiece is a bath of molten sodium cyanide and sodium carbonate. This process is conducted at a temperature of 950^oC. This causes the formation of hard iron nitrides which leads to surface hardening of the material.

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