AT30126B - Compound pipe made of steel and nickel or nickel alloys and method for heating nested pipes made of steel and nickel or nickel alloys to welding heat. - Google Patents
Compound pipe made of steel and nickel or nickel alloys and method for heating nested pipes made of steel and nickel or nickel alloys to welding heat.Info
- Publication number
- AT30126B AT30126B AT30126DA AT30126B AT 30126 B AT30126 B AT 30126B AT 30126D A AT30126D A AT 30126DA AT 30126 B AT30126 B AT 30126B
- Authority
- AT
- Austria
- Prior art keywords
- nickel
- steel
- alloys
- nickel alloys
- welding heat
- Prior art date
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims description 36
- 229910052759 nickel Inorganic materials 0.000 title claims description 18
- 229910000831 Steel Inorganic materials 0.000 title claims description 14
- 239000010959 steel Substances 0.000 title claims description 14
- 238000003466 welding Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 6
- 238000010438 heat treatment Methods 0.000 title claims description 4
- 229910000990 Ni alloy Inorganic materials 0.000 title description 6
- 150000001875 compounds Chemical class 0.000 title description 2
- 239000007789 gas Substances 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 238000005452 bending Methods 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
Landscapes
- General Induction Heating (AREA)
- Arc Welding In General (AREA)
Description
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Compoundrohr aus Stahl und Nickel bzw. Nickellegierungen und Verfahren zum Erhitzen von ineinandergeschobenen Rohren aus Stahl und Nickel bzw. Nickellegierungen auf
Schweisshitze.
Die vorliegende Erfindung bezieht sich auf die Herstellung von Eisen- odor Stahl- rohren mit einem durch Aufschweissen erhaltenen äusseren oder inneren, oder auch beiderseitigen Nickelüberzug, zum Zwecke, nicht rostbaro Rohrflächen zu erhalten. Durch die Erfindung wird ein Verfahren angegeben, mittels dessen die Oberflächen der beiden Metallo vollkommen miteinander verschweisst werden können, so dass, wenn das Rohr gebogen,
EMI1.1
schichten erfolgt.
Nach vorliegender Erfindung wird in erfolgreicher Weise eine Schicht Nickel auf die Aussen-oder Innenseite eines Eisen- oder Stahl rohres aufgeschweisst, indem man die miteinander zu verschweissenden Flächen während des Erhitzens der ineinandergeschobenen
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dieselbe Härte wie Stahl, und die Schmelzpunkte der beiden Metalle liegen einander sehr nahe.
Bei dem Versuche, mittels der gewöhnlichen Methode Nickel auf Eisen aufzuschweissen, wird das Nickel, wenn es erhitzt wird, Sauerstoff, absorbieren, welcher die Beschaffenheit der Schweissflächen verändert und eine richttge Schweissung verhindert. Aber durch Ineinanderschieben von nahtlosen Rohrstücken aus Nickel und Eisen, wodurch der Zutritt der Feuergase zu den Schweissfläche verhindert wird, können ausgezeichnete Erfolge erhalten werden.
Bei Ausübung der Erfindung zur Herstellung eines Kesselrohres mit innerer Nickeleinlage wird vorzugsweise ein nahtloses Stahlrohr genommen, dessen Innenflächen geätzt
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das Stahlrohr ein dünnes ebensolanges nahtloses Nickelrohr hineingeschoben. Alsdann wird in die Enden des Nickelrohres ein Dorn mit zugespitztem Kopf hineingetrieben, wodurch die Enden aufgeweitet worden, so dass sie fest in die Enden des hohlen Stahlrohres hineinpassen und die Luft und heissen Gase des Ofens daran hindern, mit den zu verschweissenden Nickel- und Stahlflächen in irgendeinem schädlichen Masse in Berührung zu kommen.
Darauf wird das zusammengesetzte hohle Metall- oder Arbeitsstück in einen
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<Desc/Clms Page number 2>
Stahlrohrstückes zusammenziehen, wogegen sich das innenliegende, polierte Nickelrohrstück ausdehnt, so dass die miteinander zu verschweissenden Flächen dichter aneinandergebracht werden.
Ats Material für die Rohrüberzüge und Futter lassen sich statt Nickel auch Nickellegierungen verwenden.
PATENT-ANSPRÜCHE :
1. Verfahren zum Erhitzen von ineinandergeschobenen Rohren aus Stahl und Nickel bzw. Nickellegierungen auf schweisshitze, gekennzeichnet durch die Verwendung eines nahtlosen Stabl- und Nickelrohres, wodurch der Zutritt der Heizgase zwischen die ineinander- geschobenen Rohre beim Erhitzen derselben verhindert wird.
<Desc / Clms Page number 1>
Compound tube made of steel and nickel or nickel alloys and method for heating nested tubes made of steel and nickel or nickel alloys
Sweat.
The present invention relates to the production of iron or steel pipes with an external or internal nickel coating obtained by welding, or also on both sides, for the purpose of obtaining non-rustable pipe surfaces. The invention provides a method by means of which the surfaces of the two metallo can be completely welded together so that when the pipe is bent,
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layers takes place.
According to the present invention, a layer of nickel is successfully welded onto the outside or inside of an iron or steel pipe, in that the surfaces to be welded to one another are pushed together while the surfaces are being heated
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same hardness as steel, and the melting points of the two metals are very close.
When attempting to weld nickel onto iron using the usual method, the nickel, when heated, will absorb oxygen, which changes the nature of the welding surfaces and prevents a correct weld. However, excellent results can be obtained by sliding seamless nickel and iron pipe sections into one another, thereby preventing the fire gases from reaching the welding surface.
When practicing the invention to manufacture a boiler tube with an inner nickel insert, a seamless steel tube is preferably used, the inner surfaces of which are etched
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A thin, seamless nickel tube of the same length is pushed into the steel tube. Then a mandrel with a pointed head is driven into the ends of the nickel tube, widening the ends so that they fit tightly into the ends of the hollow steel tube and prevent the air and hot gases of the furnace from contacting the nickel and steel surfaces to be welded to come into contact in any harmful measure.
Then the assembled hollow metal or work piece is turned into a
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<Desc / Clms Page number 2>
Pull the steel pipe piece together, whereas the inner, polished nickel pipe piece expands, so that the surfaces to be welded together are brought closer together.
As the material for the pipe covers and linings, nickel alloys can also be used instead of nickel.
PATENT CLAIMS:
1. Method for heating nested tubes made of steel and nickel or nickel alloys to welding heat, characterized by the use of a seamless rod and nickel tube, which prevents the hot gases from entering between the nested tubes when they are heated.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT30126T | 1905-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AT30126B true AT30126B (en) | 1907-10-10 |
Family
ID=3543941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AT30126D AT30126B (en) | 1905-04-20 | 1905-04-20 | Compound pipe made of steel and nickel or nickel alloys and method for heating nested pipes made of steel and nickel or nickel alloys to welding heat. |
Country Status (1)
| Country | Link |
|---|---|
| AT (1) | AT30126B (en) |
-
1905
- 1905-04-20 AT AT30126D patent/AT30126B/en active
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