Tungsten impregnated casting mold

Details Tungsten impregnated casting mold Tungsten impregnated casting mold

1977-12-23

1979-01-16

Van Balen, William J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

106 382, 106 3822, 164 24, 427133, 428450, B32B 106, B32B 326

Patent

active

041350308

ABSTRACT:
A method for producing a low reactivity tungsten impregnated ceramic mold for casting refractory metals such as titanium is described. The method involves impregnation of a standard ceramic shell mold with an aqueous solution of tungstic acid and ammonium hydroxide. The saturated mold is then dried and fired to convert the tungsten compound to metallic tungsten or tungsten oxides. The process may be repeated several times to achieve the desired tungsten concentration.

REFERENCES:
patent: 2144532 (1939-01-01), Hall
patent: 2806271 (1957-09-01), Operhall
patent: 3177084 (1965-04-01), Amstein
patent: 3180632 (1965-04-01), Katz et al.
patent: 3494997 (1970-02-01), Dittrich et al.
patent: 3537949 (1970-11-01), Brown et al.
patent: 3556843 (1971-01-01), Buck
patent: 3669724 (1972-06-01), Brand

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