DE734197C - Process for producing a layer of heat-resistant bronze in the case of steels susceptible to welding cracks, in particular cast chromium or copper-molybdenum steel - Google Patents

Process for producing a layer of heat-resistant bronze in the case of steels susceptible to welding cracks, in particular cast chromium or copper-molybdenum steel

Info

Publication number
DE734197C
DE734197C DEK163221D DEK0163221D DE734197C DE 734197 C DE734197 C DE 734197C DE K163221 D DEK163221 D DE K163221D DE K0163221 D DEK0163221 D DE K0163221D DE 734197 C DE734197 C DE 734197C
Authority
DE
Germany
Prior art keywords
copper
heat
layer
producing
bronze
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
DEK163221D
Other languages
German (de)
Inventor
Dipl-Ing Arthur Peters
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.)
Fried Krupp Germaniawerft AG
Original Assignee
Fried Krupp Germaniawerft 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 Fried Krupp Germaniawerft AG filed Critical Fried Krupp Germaniawerft AG
Priority to DEK163221D priority Critical patent/DE734197C/en
Application granted granted Critical
Publication of DE734197C publication Critical patent/DE734197C/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
    • B23K28/00—Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
    • B23K28/02—Combined welding or cutting procedures or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Arc Welding In General (AREA)

Description

Verfahren zum Herstellen einer Auflage von warmfester Bronze bei schweißrißempfindlichen Stählen, insbesondere Chrom oder Kupfer-Molybdänstahlguß Da bei warmfesten Stahlgußkörpern eine Hartmetallauflage für hochbeanspruchte Flächen, wie z. B. Ventilsitze und Schieberdichtungen, nicht immer zweckmäßig ist, hat auch die Verwendung von warmfester Bronze in solchem Zusammenhang nach wie vor praktische Bedeutung. Dabei hat sich jedoch herausgestellt, daß das übliche Verfahren zum Auftragen von Bronze nicht durchführbar ist, weil das Gefüge des Grundwerkstoffes infolge der gleichfalls sehr hohen Schmelztemperatur der warmfesten Bronze durch interkristalline Durchdringung zerstört wird.Process for producing a layer of heat-resistant bronze in the case of weld crack-sensitive Steels, in particular chrome or copper-molybdenum steel castings As for heat-resistant cast steel bodies a hard metal support for highly stressed surfaces, such as B. valve seats and slide seals, is not always appropriate, the use of heat-resistant bronze in such Context remains of practical importance. It turned out, however, that the usual method of applying bronze is not feasible because the structure of the base material due to the also very high melting temperature the heat-resistant bronze is destroyed by intergranular penetration.

Um .nun eine unmittelbare Verbindung der Bronze mit dem Grundwerkstoff zu vermeiden, ist durch längere Versuche ein praktisch brauchbares Verfahren gefunden worden, bei dem erfindungsgemäß als erste Zwischenschicht ein nichtrostender Stahl und auf diesen nach dem Arcatomverfahren als zweite Zwischenschicht Kupfer aufgeschweißt wird. Der ganze N'organg ist im einzelnen etwa folgender: Die normalerweise zurr Einbringen der Bronze vorgesehene flache Mulde wird mit einem geeigneten nichtrostenden Stahl voll geschweißt und anschließend sauber abgedreht. Da eine unmittelbare Bindung von Bronze auf diesem Stahl nicht dauerhaft ist, wird zunächst Kupfer in ganz dünner Schicht nach dem Arcatomschweißverfahren bei hoher Temperatur aufgebracht. -.%,ach Reinigung der Kupferoberfläche kann in an sich bekannter `'eise nunmehr die warenfeste Bronze auf das Kupfer aufgetragen «-erden. Hierbei wurde wider Erwarten ein Vorzug des neuen Verfahrens insofern offenbar, als einerseits durch die Arcatornverschweißung des Kupfers mit dein nichtröstenden Stahl eine gute Verhindung dieser beiden Werkstoffe ohne Rißbildung -erre-ichbar ist und andererseits auch die U'ronzeschicht@fest auf dein Kupfer haftet.A direct connection between the bronze and the base material To avoid this, a practically useful process has been found through lengthy experiments has been, in which, according to the invention, a stainless steel as the first intermediate layer and copper welded onto it as a second intermediate layer using the Arcatom process will. The whole process in detail is roughly as follows: The normally zurr Bringing in the bronze provided shallow trough is made with a suitable stainless steel Steel fully welded and then neatly turned off. Because an immediate bond If bronze is not permanent on this steel, copper will initially be quite thinner Layer applied according to the arcatom welding process at high temperature. -.%,Oh Cleaning of the copper surface can now be done in a well-known way Bronze applied to the copper "-ground. Contrary to expectations, this became an advantage of the new process to the extent that, on the one hand, through the arcator welding the copper with your stainless steel a good prevention this Both materials can be achieved without cracking and, on the other hand, the uranium layer is solid sticks to your copper.

Das neue Verfahren ermöglicht die Einsparung_erheblicherMengen der hochwertigen Bronze, da diese nicht mehr für den ganzen, Ventilkörper o. dgl., sondern nur noch alldünne Schicht für eine Sitz- bz«-. Dichtungs-@ fläche im Gehäuse verwendet zu werden braucht.The new process enables significant amounts of high-quality bronze, as this is no longer for the whole valve body or the like, but only a very thin layer for a seat or «-. Sealing surface used in the housing needs to become.

Claims (1)

PATENTANSPRUCH: '\.'erfahren zum Herstellen eurer Auflage von warmfester Bronze bei schweißrißempfindlichen Stählen, insbesondere Chrom- oder Kupfermolcbdänstahlguß, dadurch gekennzeichnet, daß als erste Zwischenschicht ein nichtrostender Stahl und auf diesen nach dem Arcatomverfahren als zweite Zwischenschicht Kupfer aufgeschweißt wird. PATENT CLAIM: '\.' Learned about the production of your overlay of heat-resistant bronze in steels that are sensitive to weld cracks, in particular chrome or molten copper cast steel, characterized in that a stainless steel is welded as the first intermediate layer and copper is welded onto this according to the arcatom process as the second intermediate layer.
DEK163221D 1942-01-01 1942-01-01 Process for producing a layer of heat-resistant bronze in the case of steels susceptible to welding cracks, in particular cast chromium or copper-molybdenum steel Expired DE734197C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK163221D DE734197C (en) 1942-01-01 1942-01-01 Process for producing a layer of heat-resistant bronze in the case of steels susceptible to welding cracks, in particular cast chromium or copper-molybdenum steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK163221D DE734197C (en) 1942-01-01 1942-01-01 Process for producing a layer of heat-resistant bronze in the case of steels susceptible to welding cracks, in particular cast chromium or copper-molybdenum steel

Publications (1)

Publication Number Publication Date
DE734197C true DE734197C (en) 1943-04-20

Family

ID=7254470

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK163221D Expired DE734197C (en) 1942-01-01 1942-01-01 Process for producing a layer of heat-resistant bronze in the case of steels susceptible to welding cracks, in particular cast chromium or copper-molybdenum steel

Country Status (1)

Country Link
DE (1) DE734197C (en)

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