First patented in 1931 by Siemens und Halske Company, Germany, cold crucible induction melting is predicated on the principles of inductively heating material inside a crucible while cooling the ...

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Vacuum induction melting (VIM) uses an induction heating source within a sealed, air-evacuated chamber. Often, crucibles that minimize contamination are used, and combined with the sealed chamber ...

The crucibles employed should be thoroughly cleaned ... it having been found that castings of bronze and brass give, at the second melting (when the proportions of the metal are correct), a ...