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Publication numberUS2061370 A
Publication typeGrant
Publication dateNov 17, 1936
Filing dateJan 7, 1935
Priority dateJan 18, 1934
Publication numberUS 2061370 A, US 2061370A, US-A-2061370, US2061370 A, US2061370A
InventorsRohn Wilhelm
Original AssigneeRohn Wilhelm
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Heat resisting article
US 2061370 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Patented Nov. 1 7, 1 936 UNITED STATES PATENT omca 2,061,310 I near nasrsrma ARTICLE Wilhelm Rohn, Hanau-on-the-Main, Germany No Drawing. Application January '1, 1935, Serial No. 735. In Germany January 18, 1934 Z-Claims. (Cl. 75 -124) 0 which hitherto were generally used for heating elements however their workability with aluminum contents exceeding 6% is unsatisfactory. It has been attempted to diminish the grain size and thereby to improve the workabilityofl these alloys by adding thereto certain elements such as titanium, zirconium or cobalt. However all these additions do not improve the heatfresijst ing qualities of the alloys because they det M 7 rate the dense mixture of aluminum and. chro' v um oxide firmly adhering to the surfaces of heating elements and produce pulverulent and brittle oxides. V

Numerous experiments of. the inventor have shown that for the production of elements for which a high resistivity to heat is required, even after they are worked and have been exposed to elevated temperatures for a long while, alloys aresuitable containing besides iron aluminum 0.1 to 11.5%, chromium 0 to 30% and a metal or metals or the rare earths, especially cerium 0.05

to 2%. The metals of the rare earths favorably influence the durability and the life of the alumle num-iron or chromium-aluminum-iron alloys which in themselves are already highly resistive to heat. durability, i. e. the time required until burning out at 1200 C. of an alloy consisting of chromium a 30%, aluminum 5%, remainder iron, could be trebled by the addition of 0.2% cerium.

The cerium may preferably be added in the 0 form of the so-called cerium mixed metal containing, besides cerium, other metals of rare earths invarious proportions, for instance, lanthanum, dysprosium.

The quantity of the rare earth metals preferl5 ably amounts to 0.05 to 2%. I

The rare earth metals are preferably added ashort time before casting-in order to reduce as (are: p ssible the waste of these metals. The rarev earth metals may be introduced into-the 20 or into the casting-jet.

I claim:--

1.-.-Heat resisting articles 1n wrought condition containing aluminum 0.1 to 11.5%, chromium up to 3d% and metals of the rare earths 0.05 to 2%,

the remainder being substantially iron.

2. Heat resisting articles in wrought condition containing aluminum 0.1 to11.5%, chromium up to and cerium 0.05 to 2%, the remainder being-substantially iron.


For instance, it was found that the 5

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2768915 *Nov 12, 1954Oct 30, 1956Edward A GaughlerFerritic alloys and methods of making and fabricating same
US2813789 *Apr 8, 1952Nov 19, 1957Glaser LouisPermanent magnet alloys
US3027252 *Sep 29, 1959Mar 27, 1962Gen ElectricOxidation resistant iron-chromium alloy
US3293007 *Nov 29, 1965Dec 20, 1966Carl S WukusickSteam corrosion-resistant iron-chromium-aluminum-yttrium alloys and process for making same
US3298826 *Apr 6, 1964Jan 17, 1967Wukusick Carl SEmbrittlement-resistant iron-chromium-aluminum-yttrium alloys
US4870046 *Apr 21, 1988Sep 26, 1989Nippon Steel CorporationRolled high aluminum stainless steel foil for use as a substrate for a catalyst carrier
US4904540 *Oct 26, 1988Feb 27, 1990Kawasaki Steel Corp.Fe-Cr-Al stainless steel having high oxidation resistance and spalling resistance and Fe-Cr-Al steel for catalyst substrate of catalytic converter
US5578265 *Aug 17, 1995Nov 26, 1996Sandvik AbFerritic stainless steel alloy for use as catalytic converter material
DE3726072A1 *Aug 6, 1987Feb 16, 1989Thyssen Edelstahlwerke AgSoldering method
DE3726073C1 *Aug 6, 1987Jul 14, 1988Thyssen Edelstahlwerke AgVerfahren zur Herstellung von duennwandigem Halbzeug und dessen Verwendungen
DE3726075C1 *Aug 6, 1987Mar 2, 1989Thyssen Edelstahlwerke AgMethod of soldering steel parts and of producing catalyst supports, heat exchangers and soot filters
DE3726076C1 *Aug 6, 1987Mar 9, 1989Thyssen Edelstahlwerke AgFilterkoerper zum Ausfiltrieren von Feststoffpartikeln mit Durchmessern ueberwiegend kleiner als 5 mum aus stroemenden Fluiden und Verfahren zu seiner Herstellung
EP0034133A1 *Jan 30, 1981Aug 19, 1981Bulten-Kanthal ABElectrical heating element
EP0091526A2 *Nov 25, 1982Oct 19, 1983Allegheny Ludlum CorporationIron-chromium-aluminium alloy and article and method therefor
U.S. Classification420/40, 420/83, 420/77
International ClassificationC23C24/08, C22C38/18
Cooperative ClassificationC23C24/08, C22C38/18
European ClassificationC23C24/08, C22C38/18