| 摘要 |
FIELD: process engineering. ^ SUBSTANCE: invention relates to machine building, particularly, to turbo machine flow section seals operated at higher temperatures and high-frequency oscillations. Proposed method comprises sintering granules of run-in material powder particles in mould in vacuum or protective medium. Layer of high-temperature solder is pre-applied on their surface to produce shell on every granule to sinter said granules to solid metal carcass of their shells. Aforesaid run-in material represents a mechanical mix of allow powder containing the following components, in wt %: Cr - 10.0 to 18.0%, Mo - 0.8 to 3.7%, Fe or Ti or Cu or combination thereof making the rest, or allow containing: Cr - 18% to 34%; Al - 3% to 16%; Y - 0.2% to 0.7%; Ni making the rest, or alloy containing: Cr - 18% to 34%; Al - 3% to 16%; Y - 0.2% to 0.7%; Co - 16% to 30%; Ni making the rest, with particle size varying from 15 mcm to 180 mcm, with powders of hexagonal boron nitride in amount of 1.0-1.5 % of total amount of mix and calcium fluoride in amount of 6.0-8.0% of total amount of mix. ^ EFFECT: higher run-in properties, mechanical strength and wear resistance. ^ 23 cl, 2 dwg, 1 ex |
