Name of the University : Jadavpur University
Department : Metallurgical Engineering
Degree : B.E
Subject Name : Metal Working Process
Year/Sem : IV/I
Website : jaduniv.edu.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/dspace.jdvu.ac.in/5473-METAL%20WORKING%20PROCESS.pdf
Metal Working Process Question Paper :
Bachelor Of Metalurgical Engg Examination,2010 :
(4 th Year, 1st Semester)
Time : Three hours.
Full Marks : 100
Related : Jadavpur University Material Engineering B.E Question Paper : www.pdfquestion.in/5472.html
Answer any five questions :
1. What are the index used to describe the severity of plastic deformation in forging? State their drawbacks and give more useful index of principal deformation. Discuss the variables that influence the ability of metals to flow during forging. Important dimensions in the flash region of a die are the saddle width and flash thickness – Explain. 2+3+12+3
2. Find out the improved cold rolling loads from normal pressure calculation. High purity aluminium strip 1500 m wide is cold rolled from 4 mm to 3.3 mm thickness on a four-high mill with 500 mm diameter work rolls. Mean plain strain flow stress of the material is 143.85N/mm2. Determine the improved value of the rolling load if m= 0.06 10+10
3. Calculate the total amount of electricity consumed in making a particular reduction from rolling. A coil of brass, 35 m long and 0.7 m wide, is produced after a reduction from 5 mm down to 4mm in a single pass on a two high rolling mill under constant load conditions. The steel roll diameters are 0.6 m and rotates at 30 r.p.m. If the constant load is 600 tonne, determine the horse power developed and the energy consumed. [ Assume any missing data] 10+10
4. Find out the extrusion pressure under ideal condition. Why is it necessary to express the amount of deformation by ‘extrusion ratio’ not by % reduction? Discuss the variables in extrucsion determining the extrusion pressure. 5+3+12
5. a) Describe the following forging processes and their applications:
i) Stamping in horizontal forging m/c
ii) Knural Roll forging
iii) Transverse spiral roll forging
b) How forgeability is being evaluated and how it can be improved? 15+5
6. a) What is redundant work? How can it be minimized?
b) Discuss the different techniques used in minimizing extrusion defects.
c) How one can produce seamless tube without mandrel? 6+8+6
7. How do you classify sheel metal forming? Discuss in short four import forming methods and their merits & demerits. State the probable defects that may arise in such formed parts. 2+15+3
8. Write Short notes on (any four) : 4*5 = 20
a) Rolling defects
b) Rotary swaging m/c
c) The Planetary mill
d) Wire drawing
e) Thermal spraying
Met / T / 412: Metal Working Processes :
Concepts of stress & plastic state of deformation – principal stress, normal stress, hydrostatic stress, shear stress etc., Yield Criteria – Von Mises & Tresca.
Elements of metal deformation processes – Rolling: hot rolling & cold rolling; Forging: open die forging, closed die forging & press forging; Extrusion: direct, indirect & Aluminium extrusion; Wire drawing; Sheet metal working; Stretch forming for foils. Deformation load calculations. Defects & limitations, Comparison of metal working & shaping processes.
Met / T/411: Alloy Steel Making And Ferroalloys :
Alloy steel making processes – special reference to stainless steels, high speed steel, manganese steel and other special steels, Thermodynamics and kinetics of alloy steel making, Defects & remedies, Post solidification treatments, Secondary alloy steel making technologies. Problems.
Overview of Indian ferro alloy sector & alloy steel sector, Basics of ferro alloys production – concepts, thermodynamic principles & techniques, Existing production process of important ferro alloys , Fe-Cr, Fe-Mn, Fe-Si, Recent advances in ferro alloy technology, Production of other ferro alloys – Fe-V, Fe-Ti, Fe-W, Fe-Nb, Fe-Mo, Fe-Ni, Fe-Zr, Fe-B etc.
Met /T / 413: Material Engineering :
Basic understanding of Dielectric and Magnetic materials, concept of polarization and local field. Dielectric constant, loss and relaxation time – concept of complex permittivity. Ferro- electric ceramics and their temperature dependent response.
Origin of interaction in ferrimagnetic materials, Spinel ferrite, rare earth garnets and hexagonal ferrites. Structural ceramics- Silicon carbide, silicon nitride and transformation toughened based ceramics. Tool & Die Materials [WC & Cermet] Forging & Drawing Dies, Steel & C. I. Rolls. Heat Resistant Materials for Turbines, Super alloys, Tungsten,Nickel and Be metallurgy. Aluminum & Its Alloys – Wrought & Heat treated alloys in auto and airplanes. Copper & Alloys-
E.C.Grade, Muntz metal, Cartridge Brass, Phosphor Bronze & Bearing Bronzes.
Titanium & its Alloys- Application & Micro-structures in modern industries. Nobel Metals – Silver:uses in Electronics; Gold: Foils, Coating;Pt- Thermocouples. Magnetic materials,
Dielectric materials, Piezoelectric materials, Load cells. Polymers & Composites – Nylon-6,6, Melamine, Teflon, Neuprene, Epoxy, PET etc. Wood , Cement, Reinforced concrete, Asphalt. Bio materials, Intermetallics.