Patent · US Expired

Method of manufacturing turbine wheel disks with locally high internal compressive strains in the hub bore

US4879793A · kind A · utility

5Cited by

1References

4Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Erwin Stuecker · Oberhausen, DE
Gerhard Roettger · Neheim, DE

Key dates

Filing date	Mar 16, 1988
Grant date	Nov 14, 1989
Priority date	—
Expiry date	Mar 16, 2008

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T29/49865
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A method for manufacturing parts for rotary machines, especially turbine wheel disks, having a hub bore in a hub region, as well as turbine wheel disks manufactured by the method, includes pre-turning a contour at the hub region having a profile differing from a hub contour to be produced. At least the hub region is initially treated. At least the hub region having the pre-turned contour is cooled with a coolant fluid after the initial treatment to produce internal compressive strains in the hub region. The pre-turned contour is reduced after the cooling to the hub contour to be produced.

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