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Metallurgy and Materials B-tech ( vi Semister)

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Attempt five questions. All questions carry equal marks.Q1 is compulsory Q1 : Fill in the blanks. 1. Engineering materials can be broadly classified into ______________ Categories. 2. Nodular iron also called _________________ iron. 3. DBTT stands for _____________________. 4. FCC crystal structure contains _____________ atoms. 5. Density of aluminum is ___________. 6. Gun metal is an alloy of ________________. 7. _____________is 40% lighter than steel and 60% heavier than aluminum. 8. Tendency to fracture without appreciable deformation is called _____________. 9. _________________ is a combination of strength and ductility. 10.Lower critical temperature is denoted by _________. 11.__________________ contains both characteristics of grey iron and ductile iron. 12._____________ involves thermal reactions in which at least one product is a molten phase. 13.In ________________ branch of metallurgy, properties of metals and alloys are affected by chemical composition, mechanical treatment and heat treatment. 14.In austenite phase, max solubility of carbon is ___________ at 1130 C. 15.In ferrite phase, max solubility of carbon is ___________. 16.Steel which contains at least 11.5 % Chromium is called ___________. 17.The mixture of ferrite and cementite is called _____________. 18.Chemical formula of Hematite ore is ___________ and it contains _____________ iron. 19.The portion of the blast furnace above its widest cross-section is called _________. 20.HBI stands for ___________________. Q2: (a) What are Engineering Materials? How are they classified? Briefly describe each of them. (b) Justify the role of Materials Engineer in the modern age. Q3: (a) Why we study Physical Metallurgy ? Give its importance. (b) Define the following: i) Smelting ii) Roasting iii) Crushing iv) Calcination v) Concentration Q4: (a) Write the working principle of Blast Furnace. (b) Give the advantages and limitations of ferrous metals. Q5: (a) Stepwise describe the process of Basic Oxygen Steelmaking (BOS). (b) What do you understand from Secondary Steelmaking? Give the benefits of Ladle Refining Furnace(LRF). Q6: Draw the Iron-Carbon Diagram. With the help of Fe-Carbon diagram, define the following terms: (i) Ferrite ii) Cementite (iii) Austenite (iv) Pearlite (v) Ledeburite. Q7: Write a short note on three (3) of the following: i) ii) iii) iv) v) vi) Ductile-Brittle Transition Temperature. Advantages and applications of Copper and Aluminum Comparison of Nitriding and Carburizing process. Heat treatment and its common processes. DRI and HBI Mechanical properties of materials

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