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Related Experiment Videos

Efficacy of gas purging for titanium casting

K Tajima1, S Matsuda, S Kitajima

  • 1Department of Materials Science, Kyushu Dental College, Japan.

Dental Materials Journal
|December 1, 1994
PubMed
Summary

A new titanium casting machine with double gas purging significantly reduces oxygen contamination. This leads to lower oxygen uptake and surface hardness in pure titanium castings, improving overall quality.

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Area of Science:

  • Materials Science
  • Metallurgical Engineering
  • Biomaterials

Background:

  • Titanium castings are prone to contamination from the melting atmosphere and mold.
  • Oxygen contamination increases hardness and degrades mechanical properties of titanium.
  • Existing casting methods struggle to minimize atmospheric impurities.

Purpose of the Study:

  • To evaluate a novel titanium casting machine with a systematized double gas purging process.
  • To assess the machine's efficacy in reducing oxygen contamination in pure titanium castings.
  • To determine the impact of double purging on oxygen density, uptake, hardness, and castability.

Main Methods:

  • Utilized a newly developed titanium casting machine featuring a systematized double purging process.

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  • Measured oxygen density in the melting atmosphere before and after purging.
  • Quantified oxygen uptake in the resulting pure titanium castings.
  • Assessed surface hardness and castability of the castings.

    • Main Results:

    • The double purging operation drastically reduced oxygen density in the melting atmosphere.
    • A significant decrease in oxygen uptake by the titanium casting was observed compared to conventional methods.
    • Surface hardness of the castings was markedly reduced with the double purging operation.
    • Castability remained unaffected by the implemented purging technique.

    Conclusions:

    • The newly developed titanium casting machine with double gas purging effectively minimizes contamination.
    • This advanced method yields purer titanium castings with reduced oxygen content and hardness.
    • The system offers a significant improvement for producing high-quality titanium castings.