SPPU Mechanical Engineering (Semester 4)
Engineering Metallurgy
May 2017
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


Solve any one question from Q.1(a,b,c) &Q.2(a,b,c)
1(a) Explain the terms
i) Allotropy
ii) Solid solution
iii) Solidus line:
iv) Flow lines
4 M
1(b) Inetching of a metallographic sample necessary to measure the gain size of a plain carbon steel sample? Explain why?
4 M
1(c) What is metallography? What useful information can be obatained from it?
4 M

2(a) Explain the terms
i) Slag inclusion
ii) Numerical aperture
iii) Sulpur segregation
iv) Empty magnification
4 M
2(b) State and explain Gibbs phase rule.
4 M
2(c) What is spark test? What is its use?
4 M

Solve any one question from Q.3(a,b,c) &Q.4(a,b,c)
3(a) What is meant by critical temperature line in a an euilibrium diagram? What changes take place, during cooling, at A1 temperature in an Iron-Iron carbide pahse diagram?
4 M
3(b) Writer properties and applications of Grey cast iron.
4 M
3(c) What is Retained austenite? List effect of Retained Austenite? Explain subzero treatment of elimination of retain austenite?
5 M

4(a) Why carburising is carried out at a temperature range above 900°C
4 M
4(b) What are the advantages of Nodular cast iron over gray cast iron? Draw a typical microstructure of Nodular cast iron.
4 M
4(c) Explain why thicker sections are more susceptible to cracking during hardening heat treatment. Which heat treatment will you recommended?
5 M

Solve any one question from Q.5(a,b,c) &Q.6(a,b,c)
5(a) Explain classification of steel
4 M
5(b) Explain Heat Affected zone. Due to which manufacturing process is it formed?
4 M
5(c) What is stainless steel? Explain classification of stainless steel based on microstructure.
4 M

6(a) What is the effect of increasing cabon addition to steel on the following characteristics:
i) Hardeness
ii) Ductile to brittle transition temperature
iii) Ductility
iv) Amount of cementite
4 M
6(b) Explain the effect of Nickel and Chromium on microstructure and Mechanical properties of steel.
4 M
6(c) Explain the heat treatment of High speed steel.
4 M

Solve any one question from Q.7(a,b,c) &Q.8(a,b,c)
7(a) Cartridge brass is easily cold worked but Muntz metal cannot be cold worked. Explain why it is so.
4 M
7(b) State any two important properties of copper or copper alloys and explain how that is used in an application.
4 M
7(c) Why is A1-12% Si(LM6) alloy a very popular casting material for automotive applications?
5 M

8(a) What is modification treatment used in aluminium alloys? Why is it done?
4 M
8(b) Write short note on Nickel and Nickel alloys
4 M
8(c) Explain classification of Aluminium alloys.
5 M



More question papers from Engineering Metallurgy
SPONSORED ADVERTISEMENTS