Patent · US Active

Methods for joining a monocrystalline part to a polycrystalline part by means of an adapter piece made of polycrystalline material

US9114480B2 · kind B2 · utility

1Cited by

7References

7Claims

0Family size

Assignee

MTU Aero Engines AG · DE

Inventors

Ulrich Knott · Munich, DE
Erwin Bayer · Dachau, DE
Thomas Uihlein · Dachau, DE

Key dates

Filing date	Aug 6, 2009
Grant date	Aug 25, 2015
Priority date	—
Expiry date	Jan 27, 2031

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05D2300/607
WIPO fieldMachine tools
WIPO sectorMechanical engineering

Abstract

The present invention relates to methods for joining a rotationally asymmetrical part, preferably a turbine blade, which is made of a monocrystalline material, to a part, preferably a rotor core, which is made of polycrystalline material, having the method steps of: —joining the rotationally asymmetrical part to an adapter piece made of polycrystalline material by means of rotational friction welding, and —joining the adapter piece to the part made of polycrystalline material. The present invention also relates to a turbine blisk having a rotor core made of polycrystalline material and turbine blades made of monocrystalline material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.