Upload
govinda-kumar
View
142
Download
1
Tags:
Embed Size (px)
DESCRIPTION
Citation preview
Cont
inuo
us C
astin
g
Various furnaces used in FOUNDRY PRACTICE
• Blast Furnace
• BOF
• Cupola
• Oxygen Lance Furnace
• Electric Arc Furnace
• Induction Furnace
Crucible furnace
Cupola
Electric Arc Furnace
Induction furnace
Pouring vessel
Casting defects
• Gas defects:Blow holes and open blows; air inclusions, pin hole porosity
• Shrinkage cavity:
• Mold material defect:Cuts and washes, metal penetration, fusion, run out, rat tails and bucklsswells, drop
• Pouring metal defects:Mis-runs, cold-shuts, slag inclusion
• Metallurgical defects:hot tears, hot spots
Microporosity
Surface defects
Internal defects Internal defects
Inspection Techniques of Castings• Visual Inspectionrough surface, obvious shifts, shift of core etc
• Pressure testmicro leak detection
• Magnetic Particle Inspectionsubsurface voids, cracks etc
• Dye-penetrant Inspectioninvisible surface defects in a non-magnetic casting
• Radiographic examinationvoids, non metallic-inclusions, hot tears, cracks, porosity
• Ultrasonic Inspection• SEM