Cladding ingot to prevent hot-tearing

Details Cladding ingot to prevent hot-tearing Cladding ingot to prevent hot-tearing

2007-02-05

2009-11-17

Kerns, Kevin P (Department: 1793)

Metal founding

Process

Shaping liquid metal against a forming surface

C164S487000

Reexamination Certificate

active

07617864

ABSTRACT:
A method of casting an ingot of a metal having a susceptibility to hot-tearing while avoiding such hot tearing. The method involves co-casting a cladding metal on a surface of a metal core ingot as the ingot is being cast in a DC casting procedure. The cladding layer preferably contacts the core ingot at a position on the ingot surface where the metal of the ingot is incompletely solid, e.g. at a temperature between its solidus temperature and liquidus temperatures. The metal of the core ingot and the metal of the cladding layer are the same and, if they contain grain refiners, the are present in an amount of 0.005% by weight of the metal or less.

REFERENCES:
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patent: 4567936 (1986-02-01), Binczewski
patent: 5106429 (1992-04-01), McAuliffe et al.
patent: 6260602 (2001-07-01), Wagstaff
patent: 2005/0011630 (2005-01-01), Anderson et al.
patent: 2007/0215313 (2007-09-01), Wagstaff
patent: 2008/0008903 (2008-01-01), Bull et al.

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