Cast piece and method for producing same

• US 8,846,216 B2
• Filed: 06/19/2007
• Issued: 09/30/2014
• Est. Priority Date: 06/27/2006
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Jabado, Rene, Jensen, Jens Dahl, Krger, Ursus, Krtvelyessy, Daniel, Matz, Richard, Reiche, Ralph, Rindler, Michael, Walter, Steffen
• Primary Examiner(s): BERNATZ, KEVIN M
• Application Number:
  US12/308,732
• Publication Number:
  US 20100035084A1
• Time in Patent Office: 2,660 Days
• Field of Search: None
• US Class Current: 428/692.1
• CPC Class Codes: B22D 19/00 Casting in, on, or around objects which form part of the product B22D23/04 takes precedence; alumino-thermic welding B23K23/00; coating by casting molten material on the substrate C23C6/00
• CPC Class Codes: B22D 45/00 Equipment for casting, not otherwise provided for
• CPC Class Codes: B22D 46/00 Controlling, supervising, not restricted to casting covered by a single main group, e.g. for safety reasons controlling or regulating in general G05
• CPC Class Codes: Y10T 428/12097 Nonparticulate component encloses particles
• CPC Class Codes: Y10T 428/12458 having composition, density, or hardness gradient
• CPC Class Codes: Y10T 428/12465 having magnetic properties, or preformed fiber orientation coordinate with shape
• CPC Class Codes: Y10T 428/12493 Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
• CPC Class Codes: Y10T 428/24942 including components having same physical characteristic in differing degree
• CPC Class Codes: Y10T 428/32 Composite [nonstructural laminate] of inorganic material having metal-compound-containing layer and having defined magnetic layer

Abstract

A method for producing a cast metal piece and a cast metal piece are provided. An information element includes at least one piece of information. The information element is produced from a magnetizable material and the information is deposited n the magnetizable material and is cast into the information element during casting of the price, the casting temperature being above the Curie temperature of the magnetizable material of the information element.

Claims

1. A cast metal piece, comprising:

an information element made of a magnetizable material, wherein a piece of information is stored by providing holes or bores into the magnetizable material,

wherein the information element is cast into the cast metal piece, wherein a temperature above the Curie temperature of the magnetizable material of the information element is used for the casting,

wherein the piece of information is stored after the magnetizable material has been heated to a temperature above the Curie temperature of the magnetizable material such that the information remains un-readable directly from outside, and

wherein the information element is completely encapsulated by the cast metal piece.

2. The cast metal piece as claimed in claim 1, wherein the magnetizable material of the information element is remagnetizable in the presence of a magnetic field, wherein the piece of information is readable upon said remagnetization.

3. The cast metal piece as claimed in claim 1, wherein the holes or bores are filled with a non-magnetizable material whereby a difference between the magnetic properties of the magnetizable material and the area of the holes or bores are effected.

4. The cast metal piece as claimed in claim 1, wherein the piece of information is stored in the information element by arranging at least two materials with different magnetizability in different zones of the information element while forming a coding system.

5. The cast metal piece as claimed in claim 1, wherein the information is stored in binary form.

6. The cast metal piece as claimed in claim 1, wherein the at least a portion of the piece of information is stored in the magnetizable material in encrypted form.

7. The cast metal piece as claimed in claim 6,

wherein the magnetizable material is divided into a plurality of sections that comprises a first section and a second section,

wherein the piece of information includes a coding key and a data element

wherein the coding key is required for encrypting the data element and is stored in the first section, and

wherein the data element is stored in encrypted form using the coding key in the second section.

8. The cast metal piece as claimed in claim 1, wherein the cast metal piece is a turbine part or a turbine blade.

9. A cast metal piece, comprising:

an information element made of a magnetizable material, wherein a piece of information is stored by providing holes or bores into the magnetizable material,

wherein the information element is cast into the cast metal piece, wherein a temperature above the Curie temperature of the magnetizable material of the information element is used for the casting, and

wherein the piece of information is stored after the magnetizable material has been heated to a temperature above the Curie temperature of the magnetizable material such that the information remains un-readable directly from outside,

wherein the magnetizable material is embedded between and directly in contact with two ceramic layers.