METHOD FOR MAKING ELONGATED RODS Russian patent published in 2001 - IPC

FIELD: powder metallurgy technique, namely manufacture of rods of hard alloys having axial holes. SUBSTANCE: method comprises steps of introducing into hard alloy powder 2-2,5% of plasticizing agent; pressing plasticized powder to tile blank with density lower than designed density of pressed blank; transferring tile blank to cavity of press-mold; placing washer made of binder material between tile blanks; subjecting them to double-side pressing for making pressed blank. EFFECT: possibility for making elongated rod blanks with uniform distribution of physico-mechanical, dimensional and structural parameters along the whole length of rod. 2 cl, 7 dwg, 1 tbl, 1 ex