METHOD OF MAKING TURBO MACHINE CONFORMABLE SEAL Russian patent published in 2013 - IPC B22F7/00 F01D11/00 B22F3/12 

FIELD: process engineering.

SUBSTANCE: invention relates to machine building, particularly, to turbo machine flow section seals operated at higher temperatures and high-frequency oscillations. Conformable material powder is used to make pellets for their surface to be sintered to produce shell at every pellet. Power particles are sintered in vacuum or protective medium in mould to make preset-shape-and-size sealing element. Sintering is performed unless solid metallic carcass of pellet shells is formed in pellets bonding. Conformable material powder represents a mechanical mix of the following components in wt %: Cr - 10.0-18.0, Mo - 0.8-3.7, Fe or Ti or Cu or brass or bronze or combination thereof making the rest, or two mechanical mixes: first mechanical mix containing in wt % Cr - 14.0-18.0, Mo - 0.7-1.4, Si - 0.2-1.4, Mn - 0.1-0.5, Fe making the rest, and second mechanical mix containing in wt %: Cr - 10.0-18.0, Mo - 0.8-3.7, Fe or Ti or Cu or brass or bronze or combination thereof making the rest. In using two mixes, prior to pellets reflow, they are formed from first mix and, then, coated with shell from second mix powder.

EFFECT: better run-in properties, mechanical strength and wear resistance.

22 cl, 2 dwg, 1 ex