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2019-10-16
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At direct induction melting please notice following hint:
If a too voluminous piece of metal will be added to an already molten metal, molten metal
can “freeze”, it becomes solid again. If this form-fitting metal now is heated-up again, it
expands can disrupt the crucible. Hint: load complete amount of metal in cold crucible or
charge only small pieces into molten metal. Caution: danger of squirting!
Direct melting is usually used for metals with a high melting point.
Often (as in the case of, for example, platinum), the ceramic coating material is at the lim-
its of its thermal compatibility. Therefore, melt as soon as possible and drain immediately.
To play with liquid platinum strikes the ceramic immensely and shortens the life of the
crucible.
