Method for producing a rotor of a flow engine
The invention relates to a method for producing a rotor of a flow engine, namely an integrally bladed rotor with an integral outer shroud, comprising at least the following steps: a rotor blank comprising the integral rotor blades and the integral outer shroud is first produced by means of a generative production method; the rotor blank is then subjected to a separating surface treatment at flow-guiding sections and is subjected, separately therefrom, to a machining surface treatment at non-flow-guiding sections.
1. A method for producing a rotor of a turbo machine, the rotor comprising an integrally bladed rotor with integral outer shroud, comprising the following steps:
producing, by a generative production method, a rotor blank comprising the integral moving blades and the integral outer shroud; and
subjecting the rotor blank, on flow-conducting sections, to an abrasive cutting surface treatment and, separately, on non-flow-conducting sections, to a chip-machining surface treatment.
2. The method according to claim 1 , wherein the rotor blank comprising the integral moving blades and the integral outer shroud is produced by selective laser melting.
3. The method according to claim 2 , wherein a metal powder is used as a metal powder for the selective laser melting, the metal powder having the following composition, in percent by weight:
5.50-6.75 Al,
3.50-4.50 V,
≤0.30 Fe,
≤0.08 C,
≤0.05 N,
≤0.20 O,
≤0.015 H, and
Ti in the remainder.
4. The method according to claim 1 , wherein the rotor blank is subjected to a flow grinding on flow-conducting sections.
5. The method according to claim 1 , wherein the rotor blank is subjected to a turning on non-flow-conducting sections.
6. The method according to claim 5 , wherein the rotor blank is subjected to a flow grinding on flow-conducting sections.
7. The method according to claim 5 , wherein the flow grinding is performed prior to the turning.
8. The method according to claim 1 , wherein the rotor blank is subjected to a heat treatment prior to the abrasive cutting surface treatment and prior to the chip-machining surface treatment.
9. The method according to claim 1 , wherein the rotor blank is subjected to a hot-isostatic pressing prior to the abrasive cutting surface treatment and prior to the chip-machining surface treatment.
10. A method for producing a rotor of a turbo machine, the rotor comprising an integrally bladed rotor with integral outer shroud, comprising:
producing, by a generative production method, a rotor blank comprising the integral moving blades and the integral outer shroud; and
subjecting the rotor blank, on flow-conducting sections, to an abrasive cutting surface treatment and, separately, on non-flow-conducting sections, to a chip-machining surface treatment, and
wherein at least one of:
the rotor blank is subjected to a flow grinding on flow-conducting sections,
the rotor blank is subjected to a turning on non-flow-conducting sections, and
the rotor blank is subjected to a hot-isostatic pressing prior to the abrasive cutting surface treatment and prior to the chip-machining surface treatment.