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The iron oxide reduced the hot strength.

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in Foundry and Forging by (110k points)
The iron oxide reduced the hot strength.

(a) True

(b) False

I had been asked this question in homework.

The above asked question is from Moulding Sand Preparation and Conditioning topic in chapter Pattern Materials & Moulding Sand Tests of Foundry and Forging

1 Answer

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Best answer
Correct option is (b) False

Best explanation: Iron oxide is used approximately in the amount of 3% in the moulding sand. It is used to improve the surface finish, decrease metal penetration and reduces the burn-on. Hence, it decreases the green strength and permeability while improving the hot strength.

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