Why is preheating important in the hot welding process of cast iron?

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General Studies · Welding

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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It slows down the cooling speed and helps avoid cracks

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Answer 1

It removes all impurities from the cast iron

Answer 2

It allows faster cooling

Answer 3

It slows down the cooling speed and helps avoid cracks

Answer 4

It prevents the metal from melting

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