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MY1005 WELDING METALLURGY
Posted Date: 18 May 2008 Resource Type: Articles/Knowledge Sharing Category: Syllabus
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Posted By: J.Jerome Jernix Member Level: Silver
Rating:  Points: 1
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MY1005 WELDING METALLURGY
1. WELDING METALLURGY PRINCIPLES
Thermal cycles in welding: basic heat transfer equations, temperature distributions and cooling curves, dependence of cooling rate on heat input, joint geometry, preheat and other factors. Comparison of welding processes based on these considerations.
2. PHYSICAL METALLURGY OF WELDING
Welding of ferrous materials: Iron - carbon diagram, TTT and CCT diagrams, effects of steel composition, formation of different microstructural zones in welded plain-carbon steels. Welding of C-Mn and low-alloy steels, phase transformations in weld and heat - affected zones, cold cracking, role of hydrogen and carbon equivalent, formation of acicular ferrite and effect on weld metal toughness.
3. WELDING OF ALLOY STEELS
Welding of stainless steels, types of stainless steels, overview of joining ferritic and martensitic types, welding of austenitic stainless steels, hot cracking, sigma phase and chromium carbide formation, ways of overcoming these difficulties, welding of cast iron.
4. WELDING OF NON-FERROUS METALS
Welding of non-ferrous materials: Joining of aluminium, copper, nickel and titanium alloys, problems encountered and solutions.
5. DEFECTS AND WELDABILITY
Defects in welded joints: Defects such as arc strike, porosity, undercut, slag entrapment and hot cracking, causes and remedies in each case. Joining of dissimilar materials, testing of weldability.
TEXT BOOKS
1. Linnert. G.E. “Welding Metallurgy”. Vol. 1 and 2. 4th edition. A W S. USA, 1994.
2. Lancaster J.F. “Metallurgy of Welding”, George Allen & Unwin. Boston. 1980.
REFERENCES
1. Saferian D. “The Metallurgy of Welding”. Chapman and Hall, UK, 1985.
2. AWS Welding Hand book. 8th edition. Vol-1. “Welding Technology”, 1998.
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Responses
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| Author: Vidya 23 May 2008 | Member Level: Diamond Points : 2 | useful topic
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