Introduction to Basic Manufacturing Processes and ... - always yours

Binocular Body
Non-Ferrous Materials 101
It is made by plastic materials containing cellulose acetate (Thermo plastics), polystyrene
(thermoplastics) phenol formaldehyde (thermo setting plastics) because these materials have
high mechanical strength, impact resistance, transparency, colorability, fabricating quality,
versatility, molding ability, high dielectric strength and high refractive index.
Diesel Engine Piston
As the function of piston to reciprocate in the cylinder, it will require good wear and
corrosion resistance and ability to with stand at high temperature. Therefore material like
cast iron, bronze and aluminium alloy etc are preferred because of the requirements of
lightness with sufficient strength, refractoriness stress relieving, hardening, and tempering,
Lifting hook of crane
The purpose hook in crane is to lift load and it will require bearing sudden and excessive
heavy shock-loads without permanent injury. For such purposes wrought iron will prove
better and it is not heat-treated.
Bed of high precision lathe
Bed of high precision lathe needs high compressive strength, better shock absorbing
capacity, good damping capacity, corrosion resistance and good wear resistance, hardness and
reduced effect of residual stresses for better functional requirements. Grey cast iron because
its good lubricating properties due to presence of graphite will be suitable to meet the
functional requirements. However for increasing its usefulness alloying elements such as Ni,
Cr and Mo etc can also be alloyed in grey cast iron.
5.18 QUESTIONS
1. How do you classify non-ferrous metals?
2. Discuss the properties and uses of the following non-ferrous metals:
(i) Copper (ii) Zinc (iii) Aluminium (iv) Magnesium
(v) Lead (vi) Tin (vii) Nickel. (viii) Plutonium
3. What is brass? Describe the composition, properties and uses of important types of brasses?
4. What is bronze? Describe the composition, properties and uses of different types of bronzes?
5. Explain the various types of aluminium alloys giving their composition, properties and uses?
6. Discuss the various types of nickel alloys?
7. Which are the main metals used in nuclear energy? Describe them in brief.
8. How will you select the suitable engineering materials for a particular application?