Development of a Subscale Manufacturing Process for the Fabrication of Hypereutectic Transition-Metal Carbide Composites.

摘要

Consumable-electrode arc melting and nonconsumable-electrode skull arc melting were investigated as possible manufacturing processes for the preparation of hypereutectic zirconium and hafnium carbide alloys. Variables in these processes were examined in detail. Forty-two experimental consumable-electrode runs resulting in castings up to 5inches in diameter were performed. Techniques for preparing satisfactory castings up to 3-1/2inches in diameter by this latter process were developed. The develpped process consisted of two steps: prealloying and drop-casting. These steps are described. (Author)