<img alt="" src="https://secure.hims1nice.com/150891.png" style="display:none;">

Die Casting News

Die Casting Defects - Causes and Solutions - NADCA Book

Posted by Hill and Griffith Company on Aug 14, 2019 2:54:18 PM

NADCA offers its book outlining the causes of die casting defects and how to prevent them

This is a comprehensive textbook for die casting engineers. This revised version of the defects causes and solutions book has been completely reviewed and revised by world renowned die cast experts William G. Walkington and Dr. Morris Murray. The book includes much more detail on the cures needed to reduce and/or eliminate the defects that plague all die casters. Dr. Murray discusses each defect, in depth, and provides thoughtful solutions to try to help mitigate the problems.
Die Casting Defects - Causes and Solutions-1

The book has also been updated to include metric units and information on the latest inspection instruments used in the identification and analysis of defects in die castings.

Chapter details are as follows:

  1. Review - A review of some of the major operational practices required to reduce or eliminate effects. Just knowing the cause of the defect and asking for a correction won't fix the problem.
  2. Surface Defects - Those defects commonly called cold flow or non-fills
  3. Laminations - Defects from layers of metal forming during the process
  4. Gas Porosity - Internal porosity from trapped gas of various kinds
  5. Blisters - Surface manifestation of trapped gas
  6. Flow Porosity - Surface or internal porosity from poor pressure conditions
  7. Shrink Defects - Porosity from the volume change as the metal changes state
  8. Sinks - Surface depressions from shrinkage porosity problems
  9. Leakers - Porous sections of the casting
  10. Cracks - Visible and not-so-visible cracks in the casting
  11. Inclusions - Foreign material that may cause machining problems
  12. Solder - Build up of the case material on the die, and damage to the surface condition of the casting
  13. Carbon - Deposits other than the cast material on the die causing damage to the surface condition of the casting
  14. Erosion or Cavitation - Removal of die steel and subsequent deformation of the casting
  15. Outgassing & Edge Porosity - Gas escaping from the casting during a painting or finishing operation that causes defective surface finish
  16. Bending, Warping - Deformation of the casting sometime after it is formed in the die cavity
  17. Flash - Excessing material extending from a parting line, often accompanied by dimensional deviation
  18. Stained Castings - Discolored castings
  19. Waves and Lakes - Decorative castings with small imperfections visible only under reflected light
  20. Drags - Surface area of the casting is broken by metal stuck to the die
  21. Deformations from Ejector Pins - Casting is deformed by ejector pins (pushed pins)
  22. Cold Flakes - Leakers and break in at the gate
  23. Excessive Flux - Corrosion or porosity from excessive flux
  24. Surface Defects - Defects that are caused by surface interaction with the die


To purchase the hard copy or download the e-version of this book, go to the NADCA site.


NADCA Die Casting Process News:

State of the Die Casting Industry

Controlling Noise in a Die Cast Shop

Hill and Griffith Customer Service

We're known for our hands on approach. Let us visit your plant, offer die casting technical support and recommend release agents, lubricants, plunger lubricants and permanent mold lubricants that suit your needs. Products that represent the latest in technology and ongoing research that enhance competitiveness and increase productivity. 

Hill and Griffith Samples

Product Samples

We are pleased to provide samples in quantities large enough to allow you to "try before you buy." Die Casting and Squeeze Lubricants- Diluco®, Permanent Mold Coatings- Concote™, Plunger Lube™- Graphite and non-graphite oils and pastes with excellent anti-wear properties, Casting Operations Products: Start-up lubes, Ladle coatings, Anti-soldering pastes, Water glycol, Trim press lubricants, Surface protection for casting storage, Corrosion protection for die storage, Cleaners for machines and dies, Corrosion protection for machines, Heat treatment quenchants, and Heat-transfer fluids. Also, Industrial Lubricants Griflube®, Hydraulic fluids with fire-resistant and anti-wear properties, Bio-Syn natural ester-based hydraulic fluid, Way oil knuckle lubes and Metalworking Fluids- Grifcut™

Contact us for Product Samples

Hill and Griffith Customer Service

Technical Services & Support

On-site process surveys, Casting defect investigations, Product testing, Tooling start-ups and Statistical process controls and much more. Also, lab facilities are available to provide testing upon request. 

Contact us to Arrange a Visit

Bulletins and Technical Papers for Die Casting Products

Tags: Die Casting, Die Casting Plunger Lubricants, Die Casting Lubricants, Die Casting Defects, NADCA, NADCA Education

Subscribe to Die Casting News

Die Casting News

Follow Me

Diecasting News Categories

see all