Process for producing refractory carbide grade powder

Details Process for producing refractory carbide grade powder Process for producing refractory carbide grade powder

1976-09-24

1978-01-24

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75204, 75211, 75 5R, 75 5B, B22F 300, C22C 2900

Patent

active

040701840

ABSTRACT:
A process for producing a refractory carbide grade powder having improved particle size distribution and pressing characteristics. The process comprises forming an aqueous slurry of a standard refractory metal carbide powder and the desired matrix, attritor milling for 1 to 10 hours, removing the milled slurry from the mill, forming an aqueous slurry having a desired solid concentration, adding a water-soluble relatively long chain polyglycol as a pressing aid and spray drying the slurry to form spherical particles suitable for pressing and sintering. During sintering less grain growth of the refractory metal carbide grade powders occurs than with conventional grade powders sintered under essentially the same temperature conditions.

REFERENCES:
patent: 3525610 (1970-08-01), Meadows et al.
patent: 3698891 (1972-10-01), Patil et al.
patent: 3713816 (1973-01-01), MacCragh et al.
patent: 3846126 (1974-11-01), Foley et al.
patent: 3865586 (1975-02-01), Volin et al.
patent: 3929476 (1975-12-01), Kirby, Jr. et al.

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