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JOM

, Volume 48, Issue 10, pp 60–63 | Cite as

Applications for the strontium treatment of wrought and die-cast Al

  • B. Kulunk
  • D. J. Zuliani
Processing Reactive Metal Research Summary

Abstract

Strontium is well known for its ability to modify the eutectic silicon phase in aluminum-silicon foundry alloys. More recently, however, it has been established that strontium also stabilizes the more desirable α iron-bearing intermetallic phase in 6XXX series wrought aluminum alloys. As a result, lengthy billet homogenization times that are normally required to transform the acicular β iron-bearing intermetallic phase to the α phase can be shortened significantly. In the case of the foundry alloys, strontium additions to a 380 alloy were found to increase the pressure tightness of high-pressure die castings by as much as 60%. This improvement is believed to occur as a result of improved metal flow with the strontium addition causing a reduction in the size of the entrapped air pores and the refinement of sludge particles.

Keywords

Strontium Eutectic Silicon Strontium Concentration Foundry Alloy Sludge Particle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© TMS 1996

Authors and Affiliations

  • B. Kulunk
    • 1
  • D. J. Zuliani
    • 1
  1. 1.Timminco LimitedUSA

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