AT251900B - Heat-resistant material with high resistance to metal melts, especially iron and steel melts - Google Patents

Heat-resistant material with high resistance to metal melts, especially iron and steel melts

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Publication number
AT251900B
AT251900B AT882964A AT882964A AT251900B AT 251900 B AT251900 B AT 251900B AT 882964 A AT882964 A AT 882964A AT 882964 A AT882964 A AT 882964A AT 251900 B AT251900 B AT 251900B
Authority
AT
Austria
Prior art keywords
melts
high resistance
heat
resistant material
steel
Prior art date
Application number
AT882964A
Other languages
German (de)
Inventor
Egon Dr Pipitz
Original Assignee
Plansee Metallwerk
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 Plansee Metallwerk filed Critical Plansee Metallwerk
Priority to AT882964A priority Critical patent/AT251900B/en
Priority to DE19651483260 priority patent/DE1483260B2/en
Priority to ES0308107A priority patent/ES308107A1/en
Priority to NL6500524A priority patent/NL6500524A/xx
Priority to GB2430/65A priority patent/GB1079975A/en
Priority to FR2762A priority patent/FR1421858A/en
Priority to CH91065A priority patent/CH463122A/en
Priority to BE658761D priority patent/BE658761A/xx
Priority to SE101565A priority patent/SE315417C/en
Priority to JP40004077A priority patent/JPS4917847B1/ja
Priority to LU47855A priority patent/LU47855A1/xx
Application granted granted Critical
Publication of AT251900B publication Critical patent/AT251900B/en

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  • Compositions Of Oxide Ceramics (AREA)

Description

  

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  Warmfester Werkstoff mit hoher Widerstandsfähigkeit gegen Metallschmelzen, insbesondere Eisen- und Stahlschmelzen 
 EMI1.1 
 

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 körpern verpresst und anschliessend in neutraler oder reduzierender Atmosphäre gesintert. Bei der Sinterung von Verbundkörpern aus Zirkonoxyd und Molybdän konnten schon bei Sintertemperaturen zwischen 1700 und 21000C praktisch dichte Sinterkörper erzielt werden. 



   Der der Erfindung zugrunde liegende Werkstoff ist sehr widerstandsfähig gegen Buntmetall-, Leichtmetall-und Zinkschmelzen ; besonders bemerkenswert ist seine hohe Widerstandsfähigkeit gegen Eisenund Stahlschmelzen. Es ist ausserdem widerstandsfähig gegen Schlacken und zeichnet sich durch eine überraschend gute Temperaturwechselbeständigkeit und hohe Wärmeleitfähigkeit aus. Es ist vorgesehen, aus diesem Werkstoff Teile zu fertigen, die mit Metallschmelzen in Berührung kommen, z. B. Schutzrohre für Thermoelemente, Stranggiessdüsen und Stranggiessstopfen,   Ausgussöffnungen   für Tiegel u. dgl. 



   An Hand eines Ausführungsbeispiels wird die Erfindung noch näher erläutert. 



   Zwecks Herstellung eines Thermoschutzrohres zur Aufnahme eines Thermoelementes, das zur Messung der Temperatur von flüssigem Stahl bestimmt ist, werden 65   Vol.-%   feines Molybdänpulver, 
 EMI2.1 
 oxyd miteinander innig vermischt und durch hydrostatisches Pressen zu Rundstäben geformt. Die Stäbe werden durch Glühen bei 20000C in Wasserstoff bereits nach 1 h zu praktisch dichten Körpern gesintert. 



  Die gesinterten Stäbe weisen eine Wärmeleitfähigkeit auf, die ungefähr der von unlegiertem Stahl entspricht. Sie lassen sich durch spanabhebende Bearbeitung (Drehen) ohne Schwierigkeiten auf die gewünschte Form bringen. Das Einarbeiten der Bohrung kann natürlich auch schon am gepressten oder allenfalls vorgesinterten Rundstab vorgenommen werden. In der beschriebenen Weise hergestellte Thermoschutzrohre zeigen eine hervorragende Thermoschockbeständigkeit ; bei wiederholtem Abschrecken von   17000C   in Wasser tritt keinerlei Rissbildung auf.



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  Heat-resistant material with high resistance to metal melts, especially iron and steel melts
 EMI1.1
 

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 bodies are pressed and then sintered in a neutral or reducing atmosphere. When sintering composite bodies made of zirconium oxide and molybdenum, practically dense sintered bodies could be achieved at sintering temperatures between 1700 and 21000C.



   The material on which the invention is based is very resistant to non-ferrous, light metal and zinc melts; Its high resistance to iron and steel melts is particularly noteworthy. It is also resistant to slag and is characterized by a surprisingly good thermal shock resistance and high thermal conductivity. It is planned to use this material to manufacture parts that come into contact with molten metal, e.g. B. protective tubes for thermocouples, continuous casting nozzles and continuous casting stoppers, pouring openings for crucibles and the like. like



   The invention is explained in greater detail using an exemplary embodiment.



   For the production of a thermal protection tube to accommodate a thermocouple, which is intended for measuring the temperature of liquid steel, 65% by volume of fine molybdenum powder,
 EMI2.1
 Oxyd intimately mixed with each other and formed into round bars by hydrostatic pressing. The rods are sintered to practically dense bodies after just 1 hour by annealing at 20000C in hydrogen.



  The sintered rods have a thermal conductivity that roughly corresponds to that of mild steel. They can be brought into the desired shape without difficulty by machining (turning). The drilling can of course also be carried out on the pressed or possibly pre-sintered round rod. Thermal protection tubes produced in the manner described show excellent thermal shock resistance; no cracking occurs after repeated quenching at 17000C in water.

Claims (1)

PATENTANSPRUCH : Verwendung eines Verbundstoffes, bestehend aus feinverteilten metallischen und oxydkeramischen Komponenten, wobei die metallische Komponente auf der Basis Molybdän und/oder Wolfram aufgebaut ist und gegebenenfalls bis zu 50 Gew.-% Chrom enthält, und 60-85 Vol.-%, vorzugsweise 60 bis EMI2.2 PATENT CLAIM: Use of a composite consisting of finely divided metallic and oxide-ceramic components, the metallic component being based on molybdenum and / or tungsten and optionally containing up to 50% by weight of chromium and 60-85% by volume, preferably 60 to EMI2.2 Hafniumoxyd und/oder Titanoxyd sowie allenfalls stabilisierende Zusätze, z. B. Kalzium- oder Magnesiumoxyd, von 4 bis 10 Gew.-% enthält, als warmfester Werkstoff mit hoher Widerstandsfähigkeit gegen Metallschmelzen, insbesondere Eisen- und Stahlschmelzen. Hafnium oxide and / or titanium oxide and possibly stabilizing additives, e.g. B. calcium or magnesium oxide, contains from 4 to 10 wt .-%, as a heat-resistant material with high resistance to metal melts, especially iron and steel melts.
AT882964A 1964-01-27 1964-10-19 Heat-resistant material with high resistance to metal melts, especially iron and steel melts AT251900B (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
AT882964A AT251900B (en) 1964-10-19 1964-10-19 Heat-resistant material with high resistance to metal melts, especially iron and steel melts
DE19651483260 DE1483260B2 (en) 1964-01-27 1965-01-13 USE OF A METAL-CERAMIC SINTER MATERIAL FOR THE MANUFACTURE OF WARM-RESISTANT TEMPERATURE-RESISTANT OBJECTS
ES0308107A ES308107A1 (en) 1964-01-27 1965-01-14 Improvements in the obtaining of heat resistant materials with great capacity of resistance against metal fusions, especially against iron and steel fusions. (Machine-translation by Google Translate, not legally binding)
NL6500524A NL6500524A (en) 1964-01-27 1965-01-15
GB2430/65A GB1079975A (en) 1964-01-27 1965-01-20 Improvements in and relating to materials of high strength and resistance to molten metals and slags at elevated temperatures
FR2762A FR1421858A (en) 1964-01-27 1965-01-21 Refractory material having high resistance to molten metal fillers, and in particular molten iron and steel
CH91065A CH463122A (en) 1964-01-27 1965-01-22 Heat-resistant material
BE658761D BE658761A (en) 1964-01-27 1965-01-25
SE101565A SE315417C (en) 1964-01-27 1965-01-26 Heat-resistant material with high resistance to metal melts, in particular iron and steel, consisting of finely divided metallic and oxide-ceramic constituents
JP40004077A JPS4917847B1 (en) 1964-01-27 1965-01-27
LU47855A LU47855A1 (en) 1964-01-27 1965-01-27

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT882964A AT251900B (en) 1964-10-19 1964-10-19 Heat-resistant material with high resistance to metal melts, especially iron and steel melts

Publications (1)

Publication Number Publication Date
AT251900B true AT251900B (en) 1967-01-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
AT882964A AT251900B (en) 1964-01-27 1964-10-19 Heat-resistant material with high resistance to metal melts, especially iron and steel melts

Country Status (1)

Country Link
AT (1) AT251900B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2805154A1 (en) * 1977-02-16 1978-11-23 Gen Electric ANODE FOR ROENTINE TUBE, COATING FOR IT, AND METHOD FOR MANUFACTURING IT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2805154A1 (en) * 1977-02-16 1978-11-23 Gen Electric ANODE FOR ROENTINE TUBE, COATING FOR IT, AND METHOD FOR MANUFACTURING IT

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