nti

Co
ou
sC

nu
as

t in

g
Various furnaces
used in FOUNDRY PRACTICE

• Blast Furnace
• BOF
• Cupola
• Oxygen Lance Furnace
• Electric Arc 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 mat...
Microporosity
Surface defects

Internal defects

Internal defects
Inspection Techniques of Castings
• Visual Inspection
rough surface, obvious shifts, shift of core etc
• Pressure test
mic...
4. cont casting, furnaces, deffects
4. cont casting, furnaces, deffects
4. cont casting, furnaces, deffects
4. cont casting, furnaces, deffects
4. cont casting, furnaces, deffects
4. cont casting, furnaces, deffects
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4. cont casting, furnaces, deffects

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4. cont casting, furnaces, deffects

  1. 1. nti Co ou sC nu as t in g
  2. 2. Various furnaces used in FOUNDRY PRACTICE • Blast Furnace • BOF • Cupola • Oxygen Lance Furnace • Electric Arc Furnace • Induction Furnace
  3. 3. Crucible furnace
  4. 4. Cupola
  5. 5. Electric Arc Furnace
  6. 6. Induction furnace
  7. 7. Pouring vessel
  8. 8. 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 buckls swells, drop • Pouring metal defects: Mis-runs, cold-shuts, slag inclusion • Metallurgical defects: hot tears, hot spots
  9. 9. Microporosity
  10. 10. Surface defects Internal defects Internal defects
  11. 11. Inspection Techniques of Castings • Visual Inspection rough surface, obvious shifts, shift of core etc • Pressure test micro leak detection • Magnetic Particle Inspection subsurface voids, cracks etc • Dye-penetrant Inspection invisible surface defects in a non-magnetic casting • Radiographic examination voids, non metallic-inclusions, hot tears, cracks, porosity • Ultrasonic Inspection • SEM

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