DE538123C - Process for the production of pyrometer protection tubes from heat-resistant metals - Google Patents

Process for the production of pyrometer protection tubes from heat-resistant metals

Info

Publication number
DE538123C
DE538123C DEP60864D DEP0060864D DE538123C DE 538123 C DE538123 C DE 538123C DE P60864 D DEP60864 D DE P60864D DE P0060864 D DEP0060864 D DE P0060864D DE 538123 C DE538123 C DE 538123C
Authority
DE
Germany
Prior art keywords
pyrometer
heat
production
protection tubes
resistant metals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DEP60864D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pose & Marre
Original Assignee
Pose & Marre
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pose & Marre filed Critical Pose & Marre
Priority to DEP60864D priority Critical patent/DE538123C/en
Application granted granted Critical
Publication of DE538123C publication Critical patent/DE538123C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/08—Protective devices, e.g. casings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)

Description

Verfahren zur Herstellung von Pyrometerschutzrohren aus hitzebeständigen Metallen Metallene hitzebeständige Pyrometerschutzrohre werden bekanntlich als Formguß hergestellt oder als Spezialrohre gezogen oder aus dem Massiven gebohrt.Process for the production of pyrometer protection tubes from heat-resistant Metals Metallic heat-resistant pyrometer protection tubes are known as castings manufactured or drawn as special pipes or drilled from the solid.

Gegossene Pyrometerrohre sind sehr gut, weil die Gußhau, eine hohe Beständigkeit gegen alle Arten von Angriffen zeigt, haben aber den Nachteil, daß kleine Gußporen -immer vorhanden sind. Solche Gußporen genügen, um während des Gebrauchs Gase in das Innere des Pyrometerrohres gelangen zu lassen, welche das Thermoelement uhd das Schutzrohr zerstören. Bei gezogenen oder geschmiedeten Rohren zeigt sich dieser Fehler allerdings nur in geringerem Maße, weil die an sich glattere Oberfläche weniger Gelegenheit zum Angriff bietet, doch ist ein solcher immerhin vorhanden. Versuche haben nun ergeben, daß man die geschilderten Nachteile vermeiden kann, wenn man die Rohre vor der Ingebrauchnahme mit einer dauerhaften, porenfreien und festhaftenden Schutzoxydschicht versieht. Die Erfindung besteht darin, daß die aus bekannten ,hitzebeständigen metallischenWerkstoffen hergestellten Schutzrohre von der ihnen infolge der Herstellung anhaftenden Oberflächenschicht zunächst durch Abschleifen. befreit werden und sodann-in einer oxydierenden Atmosphäre mit einer neuen, nunmehr festhaftenden und dichten Oxydschicht überzogen werden.Cast pyrometer tubes are very good because the Gusshau, a high Shows resistance to all types of attacks, but have the disadvantage that small casting pores are always present. Such casting pores are sufficient to keep them in place during use Gases get inside the pyrometer tube, which is the thermocouple uhd destroy the protective tube. In the case of drawn or forged tubes, this shows however, this error is only to a lesser extent because the surface is actually smoother offers less opportunity to attack, but there is at least one. Experiments have now shown that the disadvantages described can be avoided, if you treat the pipes with a permanent, non-porous and firmly adhering protective oxide layer. The invention consists in that the known, heat-resistant metallic materials made of protective tubes the surface layer adhering to them as a result of manufacture Sanding down. be freed and then -in an oxidizing atmosphere with a new, now firmly adhering and dense oxide layer are coated.

Auf diese Weise wird erfindungsgemäß erreicht, daß derartige Rohre mit einer festhaftenden und porenfreien Schutzschicht überzogen werden.In this way it is achieved according to the invention that such pipes be covered with a firmly adhering and pore-free protective layer.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Pyrometerschutzrohren aus hitzebeständigen Metallen, dadurch gekennzeichnet, daß die Rohre nach dem Gießen, Ziehen oder Bohren von der Oberflächenschicht durch Abschleifen befreit und dann oxydiert werden.PATENT CLAIM: Process for the production of pyrometer protection tubes made of heat-resistant metals, characterized in that the pipes after casting, Pulling or drilling freed from the surface layer by grinding and then are oxidized.
DEP60864D 1929-07-27 1929-07-27 Process for the production of pyrometer protection tubes from heat-resistant metals Expired DE538123C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP60864D DE538123C (en) 1929-07-27 1929-07-27 Process for the production of pyrometer protection tubes from heat-resistant metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP60864D DE538123C (en) 1929-07-27 1929-07-27 Process for the production of pyrometer protection tubes from heat-resistant metals

Publications (1)

Publication Number Publication Date
DE538123C true DE538123C (en) 1931-11-11

Family

ID=7389544

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP60864D Expired DE538123C (en) 1929-07-27 1929-07-27 Process for the production of pyrometer protection tubes from heat-resistant metals

Country Status (1)

Country Link
DE (1) DE538123C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487514A1 (en) * 1980-04-18 1982-01-29 Electricite De France Gamma ray thermometer contg. row of thermocouples - used to measure local power in fuel rod assemblies in core of nuclear reactor e.g. pressurised water reactor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2487514A1 (en) * 1980-04-18 1982-01-29 Electricite De France Gamma ray thermometer contg. row of thermocouples - used to measure local power in fuel rod assemblies in core of nuclear reactor e.g. pressurised water reactor

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