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Vacuum High-Pressure Die Casting

Author: William A. Butler, General Motors    |   Document Download   |   Product code: ZASMHBA0005276

File size: 912 KB

Classified as: Aluminum Carbon and Alloy Steels ...more

Price: $30.00 Member Price: $24.00

Vacuum high-pressure die casting uses a vacuum pump to evacuate the air and gases from the die casting die cavity and metal delivery system before and during the injection of molten metal. The term vacuum die casting can mean any reduced pressure in the die cavity below atmospheric pressure. The method is widely used not only in conventional high-pressure die casting but also to some degree in the high-integrity, high-pressure die casting processes. Effective vacuum die casting removes air and gases from the die casting die, improves the fill of the part, reduces dissolved gases in the molten metal, enhances leak tightness, allows T6 heat treating of aluminum and welding of the parts, addresses surface finish and coating issues, and can increase the burst strength of rotating components. Vacuum can also increase the operating window for the parameters of the die casting machine.

  • From: ASM Handbook Volume 15, Casting (ASM International)
  • Published: December 01, 2008
  • Pages: 2
  • Review Type: Peer reviewed