Foundry Technology Friday, January 14th, 2011

SCHEME 2010
BRANCH MECHANICAL ENGINEERING
SUBJECT CODE 10ME838
SUBJECT NAME Foundry Technology

SYLLABUS

 PART – A
UNIT - 1
Foundry Metallurgy: Oxidation of liquid metals, gas dissolution in liquid
metals, methods of degassing, fluidity, factors affecting fluidity, fluidity tests,
hot tearing, shrinkage of liquid metals.
06 Hours
UNIT - 2
Casting Design: Introduction to casting design, redesign considerations,
design for minimum casting stresses, design for directional solidification,
design for metal flow, safety factors, design for low pattern cost and model
making as an aid in design.
06 Hours
UNIT - 3
Solidification Of Castings: Crystallization and development of cast structure
- nucleation, growth and dendritic growth. Structure of castings - significance
and practical control of cast structure, grain shape and orientation, grain size,
refinement and modification of cast structure. Concept of progressive and
directional solidification, solidification time and derivation of Chvorinov’s
equation, influence on mold characteristics and cast metal.
07 Hours
UNIT - 4
Risering And Gating: Need for risering, general considerations of risering,
riser shapes, riser size, and location. Requirements of a riser. Sand,
insulating, and exothermic materials used for risers. Riser feeding distance
and theory of risering. Internal chills, external chills, use of mould materials
of different chill capacities, padding for directional solidification. Open type
and blind risers. Riser treatment using exothermic and insulating compounds.
Gating system – theoretical consideration of gating, laws of fluid flow,
turbulence in gating system, use of ceramic foam filters in gating, need for
tapered sprue, gating ratio, simple problems.
07 Hours
166
PART – B
UNIT - 5
Special Moulding Techniques: Principles, materials used, process details
and application of no-bake sand systems, vacuum moulding, flaskless
moulding, and high pressure moulding.
CUPOLA MELTING: Developments in cupola melting – hot blast cupola,
water cooled cupola, balanced blast cupola, cokeless cupola, cupola charge
calculations.
07 Hours
UNIT - 6
Ferrous Foundry: Melting procedures, casting characteristics, production,
specification, and properties of some typical steels, grey cast iron, malleable
iron, and spheroidal graphite cast iron castings.
07 Hours
UNIT - 7
Non-Ferrous Foundry: Melting procedures, casting characteristics,
production, specification, and properties of some typical aluminum, copper,
and magnesium based alloy castings.
06 Hours
UNIT - 8
Modernization And Mechanization Of Foundry: Need for modernization,
and mechanization, moulding and core making, melting, pouring, shake out
equipment and fettling, dust and fume control, material handling equipments
for sand moulds and cores, molten metal and castings, reclamation of sands.
Pollution control – norms, and agencies.
06 Hours
TEXT BOOKS:
1. Principles of metal casting, Heine Loper & Rosenthal TMH - 2005
2. Principle of Foundry Technology, P. L. Jain, 5th Ed., TMH – 2006.
REFERENCE BOOKS:
1. Castings, John Campbell, Second edition, Elseivier
2. Foundry Technology, P. N. Rao
3. Manufacturing Process, I, Dr. K. Radha Krishna 5th Edn. Sapna
Book House,


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