C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
22/174, 117/58
C23C 4/14 (2006.01) B22D 23/00 (2006.01) C23C 4/00 (2006.01) C23C 4/12 (2006.01)
Patent
CA 2034344
RD-17,399 METHOD OF FORMING DUAL ALLOY DISKS Abstract of the Disclosure A method for forming a preform having an inner portion of a first metal and an outer portion of a second metal is taught. The preform is fabricated by spray forming processing. The beginning stages of the spray forming is performed with a first metal in a dispensing crucible which supplies a stream of the first metal to an atomization zone where the stream is broken up into many droplets which are driven by an atomizing gas onto a receiving surface. The second stage of the processing involves adding small quantities of a second metal to the dispensing crucible before the first metal is completely drained therefrom to permit a blend of the two metals to be formed on the preform between an inner and an outer portion thereof. The third phase of the method is the addition of a second metal to the dispensing crucible so that the latter stages of the spray forming is performed with the second metal and accordingly that the outer portions of the preform are formed of the second metal. A desirable good metallurgical bond is formed between the inner and the outer portions of the preform.
Company General Electric
Craig Wilson And Company
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