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Metallurgical Engineering Extractive Metallurgy Difficulty: Medium

Mattee smelting is used in the extraction of

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Match the microstructural state of the following steels with. their respective heat treatments Group-I Group-II P. Eutectoid steel homogenised at 900°C and quenched in water at room temperature 1. Ferrite, martensite and retained austenite Q. A 0.4% C steel soaked at 750°C and quenched in water at room temperature. 2. Pearlite and carbide R. Normalised 1%C steel. 3. Martensite and retained austenite S. Eutectoid steel subjected to normalising 4. Pearlite The Rankine is converted into Fahrenheit What are the tests done for molding sand? Feed heads, feeders and risers in casting serve to provide sources of molten metal to compensate for At 1200°C, the standard Gibbs energy of thermal decomposition of one mole of wustite into Fe and O 2 is 168 J. The corresponding dissociation pressure (in atm.) is