Patent ID: 11878390
Assignee: SAFRAN HELICOPTER ENGINES
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 8:
9. The cold expansion device according to claim 5 wherein the turbine engine part is made of nickel alloy and wherein the selected coating covering the burnisher is:
a coating based on solid lubricants selected from MoS2, WS2, graphite, graphite fluoride, talc, and mixtures thereof, deposited by a spraying process and/or by a physical vapour deposition process and/or by a chemical vapour deposition, in a thickness of 0.5 to 5 μm, and/or
a hardness-increasing coating deposited by an ion implantation process of Boron or Nitrogen and/or a physical vapor deposition process of TiN, and/or CrN nitrides in a thickness of 0.5 to 5 μm, and/or
a mixed coating of high hardness and reduced friction coefficient of amorphous carbon or tungsten carbide/WC/C carbon type deposited by a physical vapor deposition process with a thickness of 0.5 to 4μm.