Process for producing a turbine rotor

Patent metadata

Field	Value
Publication number	US-10138733-B2
Application number	US-201314437280-A
Country	US
Kind code	B2
Filing date	Oct 22, 2013
Priority date	Nov 2, 2012
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

A process for producing a turbine rotor (1), which has, as joining partners, a turbine wheel (2) made of TiAl and a shaft (3) produced from steel, with the following process steps: providing the turbine wheel (2); providing a solder; providing the shaft (3); and connecting the turbine wheel (2) and the shaft (3) by electron beam soldering by means of an electron beam (5).

First claim

The invention claimed is:

1. A process for producing a turbine rotor ( 1 ), which has, as joining partners, a turbine wheel ( 2 ) made of TiAl and a shaft ( 3 ) produced from steel, with the following process steps:
providing the turbine wheel ( 2 );
providing a solder;
providing the shaft ( 3 );
determining a TiAl soldering temperature window having a lower end at which the solder will melt and an upper temperature which is the maximum process temperature of TiAl;
determining a steel soldering temperature window having a lower end at which the solder will melt and an upper temperature which is the maximum process temperature of steel;
contacting the turbine wheel ( 2 ) to the shaft ( 3 ) with said solder between turbine wheel ( 2 ) and shaft ( 3 ); and
moving an electron beam ( 5 ) alternately over the TiAl turbine wheel ( 2 ) and the steel shaft ( 3 ) to raise the temperature of the TiAl turbine wheel ( 2 ) at the solder to within the TiAl soldering temperature window and simultaneously raise the temperature of the steel shaft ( 3 ) at the solder to within the steel soldering temperature window, wherein the joining partners ( 2 , 3 ) are turned at the same time during said soldering.

2. The process as claimed in claim 1 , wherein the vacuum is generated in a process chamber ( 7 ) of an EB machine ( 6 ).

3. The process as claimed in claim 1 , wherein the electron beam soldering is carried out with a copper based solder.

4. The process as claimed in claim 1 , wherein the electron beam soldering is carried out with a titanium based solder.

Assignees

• Borgwarner Inc

Inventors

• Scherrer Frank
• Roder Menno
• Schall Gerald
• Strelbitski Juergen
• Loewenberg Michael
• Eisinger Stefan
• Adilovic Adnan
• Kuss Dominik

Classifications

• B23K15/06

  within a vacuum chamber (B23K15/04 takes precedence) · CPC title

• F01D5/025 Primary

  Fixing blade carrying members on shafts (attachment of a member on a shaft in general F16D1/06; for non-positive displacement pumps F04D29/00) · CPC title

• F05D2240/24

  for turbines · CPC title

• F05D2230/233

  Electron beam welding · CPC title

• B23K1/18

  circumferential seams, e.g. of shells · CPC title