METHOD OF FORMING BLANK FOR MAKING END TOOL Russian patent published in 2006 - IPC B22F3/02 B22F5/00 C22C29/00 B23P15/28 

FIELD: powder metallurgy, namely manufacture of hard alloy rods with cross section variable along axis, possibly production of end tools such as end milling cutters, reamers, broach bits.

SUBSTANCE: method for forming hard alloy blank for making end tool comprises steps of adding to powder of hard alloy mixture plasticizing agent in quantity 1.8 - 2.5 %; pressing slab blank whose density is by 30 - 40% less than that of final blank and whose cross section less than that of final blank; pressing prepared slab blank in die whose inner cavity corresponds to configuration of final blank. Mass values of slab blank and final blank are the same.

EFFECT: manufacture of articles having uniform texture and strength equal along their length and cross section.

5 dwg, 1 ex