DE2621329B1 - Deep drawing steel clad with ferritic chromium steel - which is given decarburising anneal to form superferritic chromium steel coating - Google Patents

Deep drawing steel clad with ferritic chromium steel - which is given decarburising anneal to form superferritic chromium steel coating

Info

Publication number
DE2621329B1
DE2621329B1 DE19762621329 DE2621329A DE2621329B1 DE 2621329 B1 DE2621329 B1 DE 2621329B1 DE 19762621329 DE19762621329 DE 19762621329 DE 2621329 A DE2621329 A DE 2621329A DE 2621329 B1 DE2621329 B1 DE 2621329B1
Authority
DE
Germany
Prior art keywords
steel
chromium
ferritic
chromium steel
composite material
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.)
Granted
Application number
DE19762621329
Other languages
German (de)
Other versions
DE2621329C2 (en
Inventor
Auf Nichtnennung Antrag
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.)
Kloeckner Werke AG
Original Assignee
Kloeckner Werke AG
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 Kloeckner Werke AG filed Critical Kloeckner Werke AG
Priority to DE19762621329 priority Critical patent/DE2621329C2/en
Priority to AT987076A priority patent/AT361527B/en
Priority to NLAANVRAGE7700465,A priority patent/NL176089C/en
Publication of DE2621329B1 publication Critical patent/DE2621329B1/en
Priority to FR7701898A priority patent/FR2350920A1/en
Priority to SE7701610A priority patent/SE431230B/en
Priority to US05/790,300 priority patent/US4140550A/en
Priority to GB17517/77A priority patent/GB1526654A/en
Priority to IT23571/77A priority patent/IT1115312B/en
Priority to JP52055229A priority patent/JPS5819391B2/en
Priority to BE177555A priority patent/BE854610A/en
Priority to DE2732778A priority patent/DE2732778C2/en
Application granted granted Critical
Publication of DE2621329C2 publication Critical patent/DE2621329C2/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
    • C21D3/02—Extraction of non-metals
    • C21D3/04—Decarburising
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
    • B23K20/227—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded with ferrous layer
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0257—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with diffusion of elements, e.g. decarburising, nitriding
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2251/00—Treating composite or clad material
    • C21D2251/02—Clad material
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0226—Hot rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
    • C21D8/0236—Cold rolling

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Laminated Bodies (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

Process for mfg. a composite material possessing one or more layers of chromium steel with the corrosion resistance of a superferrite. The initial material is a substrate of deep drawing steel coated with chromium steels possessing normal carbon contents. The novelty is that the substrate is alloyed with elements forming carbides and nitrides, es. Ti, and the composite material is rolled to fine sheet, then annealed at high temp. until the carbon content in the ferritic chromium steel coatings is reduced to 0.001-0.003%. The initial material pref. uses a substrate with max. 0.12% C and 0.5-2.0% Ti, the substrate being coated with ferritic chromium steel layers 50-500 mu m thick contg. max. 0.1% C. Annealing is pref. 8.72 h at 650-900 degrees C. With a carbon content of 0.001-0.003% and ca 0.010% N2, the chromium, superferritic steels possess better corrosion resistance than austenitic chromium-nickel steels, esp. w.r.t. stress cracking, intercrystalline-, pitting- and contact-corrosion.

Description

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung eines Verbundwerkstoffes.The invention relates to a method for producing a composite material.

Die Korrosionsbeständigkeit ferritischer Chromstahlgüten ist neben der Höhe des Chromgehaltes und des Zusatzes von z. B. Molybdän entscheidend von den Kohlenstoff- und Stickstoffgehalten abhängig. Während der konventionell erzeugte ferritische Chromstahl X 8 Cr 17, Werkstoff-Nr. 1.4016 gegenüber dem austenitischen Chrom-Nickel-Stahl X 5 CrNi 18 9, Werkstoff-Nr. 1.4301 eine geringere Korrosionsbeständigkeit in oxidierenden u. reduzierenden Säuren, in Basen, in SO2- und Cl-haltiger Atmosphäre zeigt, wird die Beständigkeit bei gleichem Chromgehalt mit sinkendem Kohlenstoff- und Stickstoffgehalt besser. Bei Kohlenstoffgehalten von 0,001-0,003% und Stickstoffgehalten von ca. 0,010% erreicht dieser Chromstahl (Super-Ferrit) Korrosionsbeständigkeitswerte, die höher als die des austenitischen Chrom-Nickelstahls liegen. Besonders die Beständigkeit gegen Spannungsriß-, interkristalline, Lochfraß- und Kontaktkorrosion ist besser als bei austenitischem Edelstahl. Auch die Beständigkeit in oxidierenden und reduzierenden Säuren sowie in der Atmosphäre liegt höher als bei dem austenitischen Chrom-Nickel-Stahl.The corrosion resistance of ferritic chromium steel grades is in addition to the level of the chromium content and the addition of z. B. Molybdenum is crucially dependent on the carbon and nitrogen content. While the conventionally produced ferritic chromium steel X 8 Cr 17, material no. 1.4016 compared to the austenitic Chrome-nickel steel X 5 CrNi 18 9, material no. 1.4301 has a lower corrosion resistance in oxidizing and reducing acids, in bases, in SO2- and Cl-containing atmospheres shows the resistance Better with the same chromium content with decreasing carbon and nitrogen content. With carbon contents This chrome steel (super ferrite) achieves from 0.001-0.003% and nitrogen contents of approx. 0.010% Corrosion resistance values that are higher than those of austenitic chrome-nickel steel. Particularly the resistance to stress cracking, intergranular, pitting and contact corrosion is better than that of austenitic stainless steel. Also the resistance in oxidizing and reducing acids as well as in the Atmosphere is higher than with the austenitic chrome-nickel steel.

Ferritische Chromstahlgüten mit abgesenkten Kohlenstoffgehalten von 0,001 -0,003% können nach dem gegenwärtigen Stand der Schmelz- und Raffinationstechnik nur in Elektronen-Strahl-Vakuum-Öfen erzeugt werden. Die anderen verbesserten Verfahren, wie das Vakuum-Sauerstoff-Frischverfahren, das Vakuum-Induktions-Schmelzverfahren (VlM) und das Argon-Sauerstoff-Entkohlungsverfahren (AOD) erzeugen Stahlgüten mit Kohlenstoffgehalten von nur 0,01—0,02%. Um auch den »extra low carbon« Stahlgüten mit 0,01-0,02% Kohlenstoff einen Korrosionswiderstand zu verleihen, der den austenitischen Stahlgüten gleich oder höher ist, müssen die im Stahl vorhandenen Kohlenstoff- und Stickstoffgehalte durch karbid- und nitridbildende Elemente abgebunden, d. h. stabilisiert werden. Meist wird für die Stabilisierung Titan eingesetzt, es können aber auch andere Elemente wie Niob und Tantal zulegiert werden.Ferritic chrome steel grades with reduced carbon contents of 0.001-0.003% can after current state of smelting and refining technology only produced in electron-beam vacuum furnaces will. The other improved processes, such as the vacuum oxygen refining process, the vacuum induction melting process (VlM) and the argon-oxygen decarburization process (AOD) produce steel grades with carbon contents of only 0.01-0.02%. In order to give the "extra low carbon" steel grades with 0.01-0.02% carbon a corrosion resistance that is equal to or higher than the austenitic steel grades must be those in the steel existing carbon and nitrogen contents bound by carbide and nitride-forming elements, d. H. be stabilized. Titanium is usually used for stabilization, but other elements can also be used how niobium and tantalum are added.

Die mit Titan stabilisierten ferritischen Chromstahlguten haben, wie die Versuche zeigten, eine wesentlich höhere Korrosionsbeständigkeit als unstabilisierte Chromstahlgüten mit normalen Kohlenstoff- und Stickstoffgehalten (entsprechend Werkstoff-Nr. 1.4016). Der Titangehalt muß mindestens 6 χ höher als die Summe der Kohlenstoff- und Stickstoffgehalte sein. Die titanstabilisierten ferritischen Chromstahlgüten haben gegenüber den unstabilisierten Güten den Nachteil, daß sie einen schlechteren Reinheitsgrad und eine weniger gute Oberfläche aufweisen (die Oberfläche kann nicht spiegelblank geglüht oder geschliffen werden).The ferritic chrome steel goods stabilized with titanium As the tests showed, they have a significantly higher corrosion resistance than unstabilized ones Chrome steel grades with normal carbon and nitrogen contents (corresponding to material no. 1.4016). The titanium content must be at least 6 χ higher than the sum of the carbon and nitrogen contents. the titanium-stabilized ferritic chromium steel grades have the disadvantage compared to the unstabilized grades that they have a poorer degree of purity and a less good surface (the surface cannot can be annealed or ground to a mirror finish).

Die Erfindung hat sich die Aufgabe gestellt, einen Verbundwerkstoff mit ein- oder doppelseitigen ferritischen Chroms) ahlauflagen herzustellen, bei dem der Korrosionswiderstand dieser Chromstahlauflage dem von superferritischen Material entspricht, ohne daß für die Herstellung unstabilisierte Superferrite verwendet werden.The invention has set itself the task of a composite material with one or double-sided ferritic Chromium) supports, in which the corrosion resistance of this chromium steel support corresponds to the of superferritic material, without using unstabilized superferrites for the production will.

Die Erfindung löst die gestellte Aufgabe dadurch, daß der Trägerwerkstoff mit karbid- und nitridbildenden Elementen, insbesondere Titan, legiert wird, daß das Verbundmaterial dann als Feinblech ausgewalzt wird, und daß schließlich bei so hohen Temperaturen und so langen Glühzeiten gearbeitet wird, bis der Kohlenstoffgehalt in den ferritischen Chromstahlauflagen auf Gehalte von 0,001 bis 0,003% reduziert wird.The invention solves the problem in that the carrier material with carbide- and nitride-forming Elements, in particular titanium, is alloyed so that the composite material is then rolled out as thin sheet, and that work is carried out at such high temperatures and so long annealing times until the carbon content is reached in the ferritic chrome steel layers is reduced to contents of 0.001 to 0.003%.

Das Ausgangsverbundmaterial kann als Trägerwerkstoff einen Tiefziehstahl von maximal 0,12 C aufweisen. ' Die ferritischen Chromstahlauflagen des Ausgangsverbundmaterials sollen Kohlenstoffgehalte von 0,10 C möglichst nicht überschreiten.The starting composite material can have a deep-drawing steel with a maximum of 0.12 C as the carrier material. '' The ferritic chromium steel layers of the starting composite material should have a carbon content of 0.10 ° C if possible do not exceed.

Der Titangehalt im Trägerwerkstoff variiert vorteilhafterweise zwischen 0,50 und 2,0%. Vorzugsweise liegen die zu entkohlenden Chromstahlschichtdicken zwischen 50 und 500 μπι.The titanium content in the carrier material advantageously varies between 0.50 and 2.0%. Preferably are the chrome steel layer thicknesses to be decarburized between 50 and 500 μm.

Die verwendeten Glühtemperaturen liegen vorzugsweise im Bereich von 650 und 9000C, während die Glühzeiten in Abhängigkeit von den Titangehalten des Trägerwerkstoffes der Auflageschichtdicken und der gewählten Temperatur zwischen 8 und 72 h schwanken können. Unter gewissen Bedingungen sind auch wesentlich kürzere Glühzeiten erforderlich.The calcination temperatures used are preferably in the range of 650 to 900 0 C, while the annealing times may vary h in dependence on the titanium content of the support material of the support layer thicknesses and the chosen temperature range is 8 72nd Significantly shorter glow times are required under certain conditions.

Der Vorteil des entkohlenden Glühverfahrens auf der Basis der Diffusion be.'.teht in den zu behandelndenThe advantage of the decarburizing annealing process on the basis of diffusion lies in the material to be treated

dünnen Schichten des Auflagewerkstoffes und daß die Behandlung am Ende des Feinblechfertigungsprozesses erfolgt. Nach der Glühung wird das Feinblech, wie bei einer Normaledelstahlfertigung üblich, dressiert und adjustiert. Nach diesem Verfahren können Kohlenstoffgehalte in der Plattierschicht von 0,001 bis 0,003 erzielt werden, die dem ferritischen Chromstahl einen über dem austenitischen Chrom-Nickel-Stahl liegenden Korrosionswiderstand verleihen. Die vorliegende entkohlte, unstabilisierte Chromstahlschicht ist frei von karbidisehen Einschlüssen und Verunreinigungen und läßt sich oberflächenmäßig auf Hochglanz polieren (hochglanzpolierte Flächen zeigen eine noch bessere Korrosionsbeständigkeit). Die Entkohlung dünner Edelstahlschichten nach dem Diffusionsverfahren ist auch bei Mittel- und Grobblech möglich. Die Entkohlung ist unabhängig vom Chromgehalt der Plattierschichten. Die Korrosionsbeständigkeit der Plattierschichten wird mit steigendem Chromgehalt und durch Zusatz von Molybdän verbessert.thin layers of the coating material and that the treatment at the end of the sheet metal manufacturing process he follows. After annealing, the thin sheet is dressed and, as is customary in normal stainless steel production adjusted. According to this method, carbon contents of 0.001 to 0.003 can be achieved in the cladding layer that the ferritic chromium steel has a higher corrosion resistance than the austenitic chromium-nickel steel to lend. The present decarburized, unstabilized chromium steel layer is free from carbide see Inclusions and impurities and the surface can be polished to a high gloss (high-gloss polished Surfaces show an even better corrosion resistance). The decarburization of thin layers of stainless steel the diffusion process is also possible for medium and heavy plate. The decarburization is independent on the chromium content of the clad layers. The corrosion resistance of the clad layers is with increasing chromium content and improved by adding molybdenum.

Vorzugsweise wird als Ausgangsverbundmaterial ein Material verwendet, bei dem der mit Titan legierte flüssige Trägerwerkstoff im Rahmen eines Verbundgußverfahrens, an ein ferritisches Chromstahlblech angegossen wird, welches vor dem Gießvorgang in eine Kokille eingesetzt wurde.The starting composite material used is preferably a material in which the titanium alloy is used Liquid carrier material as part of a composite casting process, cast onto a ferritic chrome steel sheet which was inserted into a mold before the casting process.

Claims (7)

Patentansprüche:Patent claims: 1. Verfahren zur Herstellung eines Verbundwerkstoffes mit einer oder mehreren Chromstahlauflagen, deren Korrosionswiderstand einem Super-Ferrit entspricht, ausgehend von einem Verbundmaterial, dessen Trägerwerkstoff in Tiefziehstahlqualität vorliegt und dessen Chromstahlauflagen normale Kohlenstoffgehalte aufweisen, dadurch gekennzeichnet, daß der Trägerwerkstoff mit karbid- und nitridbildenden Elementen, insbesondere Titan, legiert wird, daß das Verbundmaterial dann als Feinblech ausgewalzt wird, und daß schließlich bei so hohen Temperaturen und so langen Glühzeiten gearbeitet wird, bis der Kohlenstoffgehalt in den ferritischen Chromstahlauflagen auf Gehalte von 0,001 bis C,003% reduziert wird.1. Process for the production of a composite material with one or more chrome steel layers, whose corrosion resistance corresponds to a super ferrite, based on a composite material, whose carrier material is in deep-drawing steel quality and whose chrome steel layers are normal Have carbon contents, characterized in that the carrier material with carbide and nitride-forming elements, in particular titanium, is alloyed that the composite material then is rolled out as thin sheet, and that finally at such high temperatures and so long Annealing times are worked until the carbon content in the ferritic chromium steel covers on Contents from 0.001 to C.003% is reduced. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Ausgangsverbundmaterial als Trägerwerkstoff einen Tiefziehstahl von maximal 0,12 C verwendet, während die ferritischen Chromstahlauflagen einen Kohlenstoffgehalt von maximal 0,10 C aufweisen.2. The method according to claim 1, characterized in that the starting composite material as Carrier material a deep-drawing steel with a maximum of 0.12 C is used, while the ferritic chrome steel supports have a maximum carbon content of 0.10C. 3. Verfahren nach einem der vorhergehenden Ansprüche 1 und 2, dadurch gekennzeichnet, daß der Titangehalt in dem Trägerwerkstoff von 0,50 bis 2,0% variiert.3. The method according to any one of the preceding claims 1 and 2, characterized in that the Titanium content in the carrier material varies from 0.50 to 2.0%. 4. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die zu entkohlenden Chromstahlschichtdicken zwischen 50 und 500 μπι variieren.4. The method according to any one of the preceding claims 1 to 3, characterized in that the Chromium steel layer thicknesses to be decarburized vary between 50 and 500 μm. 5. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 4, dadurch gekennzeichnet, daß je nach den Schichtdicken die Glühtemperaturen zwischen 650 und 9000C variieren.5. The method according to any one of the preceding claims 1 to 4, characterized in that the annealing temperatures vary between 650 and 900 0 C depending on the layer thicknesses. 6. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 5, dadurch gekennzeichnet, daß je nach den Titangehalten des Trägerwerkstoffes, der Auflageschichtdicken und der gewählten Temperatur die Glühzeiten zwischen 8 und 72 h variieren.6. The method according to any one of the preceding claims 1 to 5, characterized in that each according to the titanium content of the carrier material, the layer thicknesses and the selected temperature the annealing times vary between 8 and 72 hours. 7. Verfahren nach einem der vorhergehenden Ansprüche 1 bis 6, dadurch gekennzeichnet, daß als Trägerwerkstoff ein St 14 RR, Werkstoff-Nr. 1.0338 mit Titan stabilisiert verwendet wird.7. The method according to any one of the preceding claims 1 to 6, characterized in that as Carrier material a St 14 RR, material no. 1.0338 stabilized with titanium is used.
DE19762621329 1976-05-14 1976-05-14 Process for the production of a composite material Expired DE2621329C2 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
DE19762621329 DE2621329C2 (en) 1976-05-14 1976-05-14 Process for the production of a composite material
AT987076A AT361527B (en) 1976-05-14 1976-12-30 METHOD FOR PRODUCING A COMPOSITE
NLAANVRAGE7700465,A NL176089C (en) 1976-05-14 1977-01-18 METHOD FOR MANUFACTURING A COMPOSITE STEEL MATERIAL
FR7701898A FR2350920A1 (en) 1976-05-14 1977-01-24 METHOD OF MANUFACTURING A COMPOSITE METAL MATERIAL
SE7701610A SE431230B (en) 1976-05-14 1977-02-14 SET FOR MANUFACTURING COMPONENT MATERIAL
US05/790,300 US4140550A (en) 1976-05-14 1977-04-25 Method of manufacturing a compound steel material of a high corrosion resistance
GB17517/77A GB1526654A (en) 1976-05-14 1977-04-27 Method of producing a corrosion-resistant compound material
IT23571/77A IT1115312B (en) 1976-05-14 1977-05-13 PROCEDURE FOR THE PRODUCTION OF A COMPOSITE MATERIAL WITH A FERRITIC CHROME STEEL COATING, IN WHICH THE CORROSION RESISTANCE OF THE SAID COATING MATCHES THAT OF A SUPER FERRITE
JP52055229A JPS5819391B2 (en) 1976-05-14 1977-05-13 Composite material manufacturing method
BE177555A BE854610A (en) 1976-05-14 1977-05-13 PROCESS FOR PREPARING A COMPOSITE RAW MATERIAL
DE2732778A DE2732778C2 (en) 1976-05-14 1977-07-20 Process for the production of a composite material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19762621329 DE2621329C2 (en) 1976-05-14 1976-05-14 Process for the production of a composite material
DE2732778A DE2732778C2 (en) 1976-05-14 1977-07-20 Process for the production of a composite material

Publications (2)

Publication Number Publication Date
DE2621329B1 true DE2621329B1 (en) 1977-01-20
DE2621329C2 DE2621329C2 (en) 1977-09-15

Family

ID=32683304

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19762621329 Expired DE2621329C2 (en) 1976-05-14 1976-05-14 Process for the production of a composite material
DE2732778A Expired DE2732778C2 (en) 1976-05-14 1977-07-20 Process for the production of a composite material

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE2732778A Expired DE2732778C2 (en) 1976-05-14 1977-07-20 Process for the production of a composite material

Country Status (1)

Country Link
DE (2) DE2621329C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4405924A1 (en) * 1994-02-24 1995-08-31 Johann Stahl Kessel Und Appara Making weld plated container bottom

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0205859B1 (en) * 1985-06-11 1989-08-16 BBC Brown Boveri AG Process for joining dispersion-hardened superalloy building elements by way of the press-bonding method
DE4023509C1 (en) * 1990-07-24 1991-11-07 Siemens Ag, 8000 Muenchen, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4405924A1 (en) * 1994-02-24 1995-08-31 Johann Stahl Kessel Und Appara Making weld plated container bottom

Also Published As

Publication number Publication date
DE2621329C2 (en) 1977-09-15
DE2732778B1 (en) 1978-04-27
DE2732778C2 (en) 1979-02-01

Similar Documents

Publication Publication Date Title
DE3787961T2 (en) Process for the production of stainless chrome steel strip with two-phase structure with high strength and high elongation and with low anisotropy.
DE69516336T2 (en) METHOD FOR PRODUCING A STEEL SHEET WITH HIGH CORROSION RESISTANCE
DE3787633T2 (en) Process for producing stainless steel strips with duplex structure, high strength and elongation and reduced even anisotropy.
EP0149655B1 (en) Diffusion treated hot-dip aluminum coated steel and method or treating
US2731403A (en) Manufacture of nickel-plated steel
DD144280A5 (en) NON-ORIENTED ELECTRIC STEEL PLATE
DE1433817A1 (en) Process for the manufacture of non-aging iron sheets with a particularly low carbon content
DE19634524A1 (en) Lightweight steel and its use for vehicle parts and facade cladding
EP0662525B1 (en) Process for preventing surface oxidation during steel carburizing
DE102018102624A1 (en) Process for producing a steel strip with improved adhesion of metallic hot-dip coatings
US2984563A (en) Stainless steel and method
DE3685824T2 (en) STAINLESS STEEL MARTENSITE STEEL WITH EXCELLENT OXYDATION RESISTANCE, PROCESSABILITY AND CORROSION RESISTANCE AND PRODUCTION PROCESS.
DE2621329C2 (en) Process for the production of a composite material
EP0353699A1 (en) Method of heat-treating a high-alloy chromium steel
EP0464265B1 (en) Method for nitriding titanium
EP0366646B1 (en) Process for producing a clad moulded body
DE2434956A1 (en) IRON-BASED ALLOY, OXIDATION RESISTANT AT HIGH TEMPERATURES
EP0226729B1 (en) Method for producing a hardened non-magnetisable rolling bearing member from an austenitic material and rolling bearing member so produced
JPS58104160A (en) Steel plate for precision blanking work with superior carburizing characteristic and hardenability and its manufacture
US4159918A (en) Method of manufacturing a compound steel material of a high corrosion resistance
DE1902209A1 (en) Method of surface hardening
US4140550A (en) Method of manufacturing a compound steel material of a high corrosion resistance
DE3101850C2 (en) Process for the production of molten aluminum coated, low carbon steel sheets with low yield strength and high resistance to high temperature oxidation
DE2810188A1 (en) Heat treating continuously cast and rolled aluminium alloy strip - consists of annealing to obtain good combination of strength and deep drawing properties
DE69802525T2 (en) METHOD FOR THE CONTINUOUS PRODUCTION OF STEEL STRIP WITH IMPROVED SURFACE PROPERTIES FOR DEEP DRAWING

Legal Events

Date Code Title Description
E77 Valid patent as to the heymanns-index 1977
8339 Ceased/non-payment of the annual fee