METHOD OF FABRICATING ELEMENT OF TURBINE RUN-IN SEAL Russian patent published in 2012 - IPC B22F7/00 B22F3/10 

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 preset size and shape rods from run-in material powders. 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%; Ni making the rest. With particle size varying from 15 mcm to 180 mcm, with powders of hexagonal boron nitride with particle size less than 1 mcm in amount of 1.0-1.5% of total mix amount and calcium fluoride CaF₂ with particle size of 1 mcm to 25 mcm in amount of 6.0-8.0% of total amount of mix. Note here that sintering is carried out at 1100-1200°C in vacuum or one of the following media ammonia, mix of argon with ammonia, mix of hydrogen with nitrogen, mix of hydrogen, argon and nitrogen.

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

11 cl, 1 ex