Manufacturing Industry
Levitation-melted metals are counter-gravity cast.
Advanced Materials & Processes, June, 2001
In a news conference at the SAE 2001 World Congress, engineers from Daido Steel Co. Ltd., Nagoya, Japan, described new technology for producing titanium alloy castings. Daido's LeviCast process combines levitation melting of titanium scrap under an argon atmosphere with low-pressure, counter-gravity casting in thin-wall ceramic shell molds (schematic).
Production castings are being made at Daido Precision Parts Co. Ltd., Gifu, Japan. Key advantage of levitation melting is elimination of alloy contamination by oxygen picked up from conventional ceramic oxide. Vacuum counter-gravity casting enables production of thin-wall parts and high part-to-part reproducibility due to a closely controlled casting rate at a lower-than normal casting temperature. LeviCast parts...
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