COMPOSITE POWDER FOR GAS THERMAL COATS Russian patent published in 2006 - IPC C23C4/10 B22F1/02 

FIELD: powder metallurgy; deposition by spraying on parts operating under extreme conditions.

SUBSTANCE: proposed composition may be used as powder or cord materials made on base of this powder. Proposed composite powder contains chromium carbide particles claded with nickel and particles consisting of core of chromium carbide Cr₃C₂ which is coated with layer of chromium carbide Cr₇C₃ and layer of chromium carbide (Cr, Ni)₇C₃ modified with nickel at the following ratio of components, mass-%: (Cr, Ni)₇C₃, 0.5-4.6; chromium carbide Cr₇C₃, 0.8-5.4; the remainder being chromium carbide Cr₃C₂, up to 100; ratio of nickel to chromium carbide particles is equal to, mass-%: nickel, 16.2-22.2; chromium carbide particles, 77.8-83.8. Proposed powder possesses high micro-hardness, high degree of spheroidizing of particles and low porosity.

EFFECT: enhanced density, high adhesion and wear resistance.

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