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Cold forging is done for _________

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in Engineering Material & Metallurgy by (773k points)
Cold forging is done for _________

(a) Improving strength and hardness

(b) Adding forging scale

(c) Eliminating carburization

(d) Rough surface finish

The question was asked in a national level competition.

The origin of the question is Cryogenics, Hot and Cold Working of Metals in section Mechanical Working Processes & Phase Transformations of Engineering Material & Metallurgy

1 Answer

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Right option is (a) Improving strength and hardness

Explanation: Cold forging processes are carried out to improve strength, hardness, and surface finishing while eliminating a forging scale and decarburization. They are commonly employed for making rivets, bolts, and nails. Cold heading is one such cold forging process.

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