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Control of Soldering and Thermal Fatigue during Die Casting

ABSTRACT
The objective of the project is to apply capabilities and technologies developed at ORNL to control soldering and thermal fatigue of die casting dies. A new high-density infrared (HDI) processing capability will be developed to apply coatings and surface treatments to die casting dies to prevent soldering and thermal fatigue. Thermodynamic models of soldering during die casting will be developed for use as a tool to predict soldering during die casting.

The HDI coating process was demonstrated on room temperature sprayed and HDI-fused Cr2C# coatings with nickel-based binders on H13 steel pins to test soldering resistance. The coated core pins were tested under industrial conditions at the facilities of TTE Casting Technologies, Oak Ridge, Tennessee. In this study, the coated pin performed significantly better than an uncoated pin even though it was subjected to significantly higher temperatures due to its position in the die cavity. During this and other tests no spalling of HDI coating has ever been observed, suggesting that cerment coatings have inherent advantages over PVD coatings in resisting spalling.
BENEFITS
  • Can be applied to other emerging technologies such as squeeze casting and semi-solid casting.

  • Less scrap and improved quality and consistency with higher dimensional and surface quality.

PERFORMING ORGANIZATION
Oak Ridge National Laboratory
CONTACT INFORMATION
Steve Udvardy
North American Die Casting Association
241 Holbrook Drive
Wheeling, IL  60090
website: www.diecasting.org

phone: (847) 279-0001
fax: (847) 279-0002
email: udvardy@diecasting.org

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