SPRAY FORMATION OF HIGH-DENSITY ALLOY-STEEL POWDER BLANKS

Powder blanks with densities of 96-98% of theoretical have been made u nder laboratory conditions with a URS-40 gas spray apparatus. The mass es of such blanks are up to 5 kg, and the forming time is 4 sec. They can have any shape (flat or cylindrical), and they can be used either as final products or employed for forming sheet strip by metallurgical forming. The bending strength of the material is 1.5 times higher tha n that in cast material by casting in a mold. Parameters have been ide ntified that need to be monitored during the forming in order to obtai n blanks with a given structure.