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Impregnation of sintered parts is usually done for _________

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Impregnation of sintered parts is usually done for _________

(a) 2-5 minutes

(b) 10-20 minutes

(c) 30-50 minutes

(d) 80-120 minutes

The question was asked by my college professor while I was bunking the class.

Question is from Sintering and Compacting, Pig Iron and its Manufacture in chapter Testing of Materials, Foundry & Powder Metallurgy of Engineering Material & Metallurgy

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The correct choice is (b) 10-20 minutes

Explanation: Sintered parts may be impregnated with oil, grease, wax, or other lubrication materials. The parts are immersed in the lubricant and heated to about 93oC. The porous structure gets completely impregnated in 10-20 minutes.

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