DE811066C - Process for achieving a hard surface when melting a cast iron layer on steel plates of low wall thickness - Google Patents

Process for achieving a hard surface when melting a cast iron layer on steel plates of low wall thickness

Info

Publication number
DE811066C
DE811066C DED2032A DED0002032A DE811066C DE 811066 C DE811066 C DE 811066C DE D2032 A DED2032 A DE D2032A DE D0002032 A DED0002032 A DE D0002032A DE 811066 C DE811066 C DE 811066C
Authority
DE
Germany
Prior art keywords
melting
cast iron
wall thickness
achieving
hard surface
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
DED2032A
Other languages
German (de)
Inventor
Fritz Schmidt
Andreas Sifrin
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.)
Deutsche Babcock and Wilcox Dampfkesselwerke AG
Original Assignee
Deutsche Babcock and Wilcox Dampfkesselwerke 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 Deutsche Babcock and Wilcox Dampfkesselwerke AG filed Critical Deutsche Babcock and Wilcox Dampfkesselwerke AG
Priority to DED2032A priority Critical patent/DE811066C/en
Application granted granted Critical
Publication of DE811066C publication Critical patent/DE811066C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Heat Treatment Of Articles (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Description

Verfahren zum Erzielen einer harten Oberfläche beim Aufschmelzen einer Gußeisenschicht auf Stahlplatten geringer Wandstärke Die Erfindung betrifft ein Verfahren zum Erzielen einer harten Oberfläche beim Aufschmelzen einer Gußeisenschicht mittels elektrischer Auftragschweißung auf plattenförmige Gegenstände geringer Wandstärke aus Stahl. Es ist bekannt, Werkstücke durch Auftragschweißung von harten Werkstoffen zu panzern. Zur Schaffung einer harten und verschleißfesten Oberfläche werden im allgemeinen hochlegierte Stähle durch Auftragschweißung auf den Stahlkörper aufgetragen. Dieses bei Absperrvorrichtungen zur Herstellung verschleißfester Dichtflächen angewandte Verfahren ist jedoch wegen des hohen Preises der Elektroden für große Flächen nicht mehr anwendbar.Method for achieving a hard surface when melting a Cast iron layer on steel plates of small wall thickness The invention relates to a Process for obtaining a hard surface when melting a cast iron layer by means of electrical build-up welding on plate-shaped objects with a small wall thickness from steel. It is known to weld workpieces by surfacing hard materials to armor. To create a hard and wear-resistant surface, the general high-alloy steels applied to the steel body by surfacing. This applied to shut-off devices for the production of wear-resistant sealing surfaces However, because of the high price of the electrodes, the method is not suitable for large areas more applicable.

Ferner ist das Anlegieren von Gußlot an Stahlkörper zur Erzielung einer verschleißfesten Ober-Schicht bekannt. Bei der Verwendung von sogenannten Gußelektroden, welche in ihrer Zusammensetzung etwa dem weißen .Gußeisen entsprechen, ist es möglich, eine harte Oberfläche zu erzielen, wenn die Dichte des Stahlkörpers so groß ist, daß er die kühlende Wirkung einer Kokille ausübt. Bei plattenförmigen Körpern reicht jedoch die Wärmeaufnahmefähigkeit des Stahles nicht aus, um die Schmelzwärme der Elektrode schnell genug abzuführen. Deshalb soll bei solchen Körpern gemäß der Erfindung die Rückseite der Stahlplatte während des Schweißens gekühlt werden. Diese Kühlung kann mittels eines aufgeblasenen Luftstrahles erfolgen oder dadurch, daß man die Platte auf einem Wasserbad schwimmend anordnet. Durch die Menge und die Temperatur des Kühlmittels kann die Abkühlwirkung so eingeregelt werden, daß die Schmelze ohne Graphitausscheidung erstarrt, daß andererseits Risse vermieden werden. Die Kühlung wird auch verhindern, daß der plattenförmige Körper seine Form verändert. Wenn eine glatte Oberfläche gewünscht wird, kann die Schweißfläche nachträglich abgeschliffen werden.Furthermore, the alloying of cast solder on steel bodies is to be achieved a wear-resistant top layer known. When using so-called Cast electrodes, which in their composition roughly correspond to that of white cast iron, it is possible to achieve a hard surface if the density of the steel body is so great that it has the cooling effect of a mold. With plate-shaped However, the heat absorption capacity of steel is insufficient for bodies to absorb the heat of fusion the electrode quickly enough. Therefore, according to the Invention the back of the steel plate can be cooled during welding. These Cooling can be done by means of an inflated air jet or by that the plate is placed floating on a water bath. Through the crowd and the Temperature of the coolant can have the cooling effect so regulated be that the melt solidifies without graphite precipitation, that on the other hand cracks be avoided. The cooling will also prevent the plate-shaped body changed its shape. If a smooth surface is desired, the weld surface can be sanded off afterwards.

Das Verfahren ist geeignet zum Panzern von Gebläseradflügeln, Baggereimern, Panzerplatten für Zerkleinerungsvorrichtungen, Schleißstücken von Rohrleitungen.The process is suitable for armoring impeller blades, excavator buckets, Armor plates for shredding devices, wear parts of pipelines.

Claims (3)

PATENTANSPRÜCHE: i. Verfahren zum Erzielen einer harten Oberfläche beim Aufschmelzen einer Gußeisenschicht mittels elektrischer Auftragschweißung auf plattenförmige Gegenstände geringer Wandstärke aus Stahl, dadurch gekennzeichnet, daß die Rückseite des Gegenstandes während des Schweißens gekühlt wird. PATENT CLAIMS: i. Process for achieving a hard surface when melting a cast iron layer by means of electrical surfacing on plate-shaped objects of small wall thickness made of steel, characterized in that the rear side of the object is cooled during welding. 2. Kühlmittel zur Durchführung des Verfahrens nach Anspruch i, dadurch gekennzeichnet, daß zur Erzielung großer Härte ein Kühlmittel mit großer Wärmeleitfähigkeit oder niedriger Temperatur, zur Erzielung geringerer Härte ein solches mit geringerer Wärmeleitfähigkeit oder höherer Temperatur benutzt wird. 2. Coolant for carrying out the method according to claim i, characterized in that for Achieve great hardness a coolant with high thermal conductivity or lower Temperature, to achieve lower hardness one with lower thermal conductivity or higher temperature is used. 3. Verfahren nach Anspruch i, dadurch gekennzeichnet, daß die hergestellte Oberfläche überschliffen wird.3. The method according to claim i, characterized in that that the produced surface is sanded.
DED2032A 1950-04-09 1950-04-09 Process for achieving a hard surface when melting a cast iron layer on steel plates of low wall thickness Expired DE811066C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED2032A DE811066C (en) 1950-04-09 1950-04-09 Process for achieving a hard surface when melting a cast iron layer on steel plates of low wall thickness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED2032A DE811066C (en) 1950-04-09 1950-04-09 Process for achieving a hard surface when melting a cast iron layer on steel plates of low wall thickness

Publications (1)

Publication Number Publication Date
DE811066C true DE811066C (en) 1951-08-16

Family

ID=7029656

Family Applications (1)

Application Number Title Priority Date Filing Date
DED2032A Expired DE811066C (en) 1950-04-09 1950-04-09 Process for achieving a hard surface when melting a cast iron layer on steel plates of low wall thickness

Country Status (1)

Country Link
DE (1) DE811066C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014209847A1 (en) * 2014-05-23 2015-11-26 Siemens Aktiengesellschaft Method for repairing an airfoil
DE102015117906A1 (en) * 2015-10-21 2017-04-27 Westfalen Ag Method and device for producing metallic objects

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE679389C (en) * 1935-12-13 1939-08-11 Wacker Chemie Gmbh Process for the production of perchlorethylene
DE708647C (en) * 1938-09-07 1941-07-25 Hoesch Akt Ges Process for the production of layers obtained by build-up welding on workpieces

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE679389C (en) * 1935-12-13 1939-08-11 Wacker Chemie Gmbh Process for the production of perchlorethylene
DE708647C (en) * 1938-09-07 1941-07-25 Hoesch Akt Ges Process for the production of layers obtained by build-up welding on workpieces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014209847A1 (en) * 2014-05-23 2015-11-26 Siemens Aktiengesellschaft Method for repairing an airfoil
DE102015117906A1 (en) * 2015-10-21 2017-04-27 Westfalen Ag Method and device for producing metallic objects
DE102015117906B4 (en) * 2015-10-21 2018-01-25 Westfalen Ag Method and device for producing metallic objects

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