DE1117362B - Process for the production of a build-up and connection welding, in particular in the case of defective casting molds (steelworks molds) for vacuum casting by means of an electric arc without preheating of the workpiece - Google Patents
Process for the production of a build-up and connection welding, in particular in the case of defective casting molds (steelworks molds) for vacuum casting by means of an electric arc without preheating of the workpieceInfo
- Publication number
- DE1117362B DE1117362B DESCH24943A DESC024943A DE1117362B DE 1117362 B DE1117362 B DE 1117362B DE SCH24943 A DESCH24943 A DE SCH24943A DE SC024943 A DESC024943 A DE SC024943A DE 1117362 B DE1117362 B DE 1117362B
- Authority
- DE
- Germany
- Prior art keywords
- molds
- casting
- preheating
- workpiece
- steelworks
- 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.)
- Pending
Links
- 238000005266 casting Methods 0.000 title claims description 23
- 238000010891 electric arc Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 230000002950 deficient Effects 0.000 title claims description 3
- 238000003466 welding Methods 0.000 title description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 24
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 229910052799 carbon Inorganic materials 0.000 claims description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims description 12
- 239000011574 phosphorus Substances 0.000 claims description 12
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 11
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 11
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 239000011593 sulfur Substances 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- -1 0.20 / Chemical compound 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000011651 chromium Substances 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 239000011733 molybdenum Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 229910052595 hematite Inorganic materials 0.000 description 2
- 239000011019 hematite Substances 0.000 description 2
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 210000004243 sweat Anatomy 0.000 description 1
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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/306—Fe as the principal constituent with C as next major constituent, e.g. cast iron
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Description
Verfahren zur Herstellung einer Auftrags-und Verbindungsschweißung, insbesondere bei schadhaft gewordenen Gießformen (Stahlwerkskokillen) für den Vakuumguß mittels eines elektrischen Lichtbogens ohne Vorwärmung des Werkstückes Die Erfindung betrifft ein Verfahren zur Herstellung einer Auftrags- und Verbindungsschweißung, insbesondere von schadhaft gewordenen Gießformen (Stahlwerkskokillen) für den Vakuumguß mittels eines elektrischen Lichtbogens ohne Vorwärmung des Werkstückes.Process for producing a build-up and joint weld, especially in the case of damaged casting molds (steelworks molds) for vacuum casting by means of an electric arc without preheating the workpiece. The invention relates to a method for producing a build-up and joint weld, in particular from defective casting molds (steelworks molds) for vacuum casting by means of an electric arc without preheating the workpiece.
Es ist zwar bei der Warmreparaturschweißung von Hämatitgußkokillen schon bekanntgeworden, daß die Durchschnittsanalysenwerte der Schweißnähte in den Übergangszonen und den Schweißnahtmitteln folgende Werte aufweisen können: Übergangszone Grundwerkstoff Schweiße: 3,00 °/o Kohlenstoff, 1,83 °/o Silizium, 0,420/, Mangan, 0,19 % Phosphor, 0;075 °/o Schwefel, 0:10()/" Nickel, Rest Eisen. Schweißnahtmitte: 2,80 °/o Kohlenstoff, 3,08 °/o Silizium, 0,410/, Mangan, 0,38 % Phosphor, 0,063 °/o Schwefel, 0,28 °/o Nickel, Rest Eisen.In the case of the hot repair welding of hematite cast ingots, it has already become known that the average analysis values of the weld seams in the transition zones and the weld seam means can show the following values: Transition zone base material welds: 3.00% carbon, 1.83% silicon, 0.420 /, manganese, 0.19% phosphorus, 0; 075 ° / o sulfur, 00:10 () / "nickel, remainder iron weld center: 2.80 ° / o carbon, 3.08 ° / o silicon, 0.41 0th /, Manganese, 0.38 % phosphorus, 0.063% sulfur, 0.28% nickel, the remainder iron.
Diese Analysenwerte sind für eine dauerhafte Reparaturschweißung auch bei einem Verfahren ohne Vorwärmung des Werkstückes erstrebenswert, doch sind diese Werte bislang bei einem Verfahren ohne Vorwärmung des Werkstückes nicht erreicht worden.These analysis values are also essential for a permanent repair weld desirable in a process without preheating the workpiece, but these are Values have not yet been achieved in a process without preheating the workpiece been.
Während früher vor Schweißarbeiten an verbranntem Guß gewarnt wurde, weil sie in den seltensten Fällen erfolgreich verliefen, sind heute Verfahren bekanntgeworden, die derartige Schweißungen mittels eines elektrischen Lichtbogens ermöglichen und bei Reparaturen von Gießformen mit verbrannter Oberfläche angewendet werden.While previously warned against welding work on burned cast iron, because they were only successful in the rarest of cases, procedures have become known today, which enable such welds by means of an electric arc and Can be used for repairs to molds with burned surfaces.
Bedingt dadurch, daß die Oberfläche einer Gießform, , die aus Hämatiteisen besteht, schon nach der ersten Benutzung der Gießform eine Gefügeveränderung erfährt, die bei jeder weiteren Benutzung tiefer in das Material der Gießform eindringt und sich als kohle-und graphitarme Zone mit sehr harter Prägung zeigt, . ist ein Schmelzfluß mittels eines elektrischen Lichtbogens bei Verwendung von Kohle- oder Stahlelektroden auch bei Variierung des Elektrodendurchmessers sowie der Schweißspannung und des -stromes im Sinne einer normalen Schweißung nicht möglich.Due to the fact that the surface of a casting mold, made of hematite iron exists, experiences a structural change after the first use of the mold, which penetrates deeper into the material of the casting mold with each subsequent use and shows itself as a carbon-poor and graph-poor zone with a very hard embossing. is a melt flow by means of an electric arc when using carbon or steel electrodes also with variation of the electrode diameter as well as the welding voltage and the current in the sense of a normal welding is not possible.
Um diesen Mangel zu beheben, ist schon bekanntgeworden, diese kohle- und graphitarme Zone zu entfernen, wonach als Randbildungsnaht eine stromführende Stahlelektrode aus 0,09 bis 0,12°/o Kohlenstoff, 0,03 °/a Silizium, 0,6 bis 0,7 °/o Mangan, 0,02 bis 0,0250/, Phosphor, 0,02 bis 0,030/, Schwefel, Rest Eisen, elektrisch verschweißt wird, in deren Lichtbogen ein Gußstab aus 3,3"/, Kohlenstoff, 3,4"/, Silizium, 0,55 °/o Mangan, 0,650/, Phosphor, 0,070/, Schwefel, Rest Eisen, mit abgeschmolzen wird, die eine ausreichende Grundhaftung am Werkstoff der Gießform erzielen lassen. Auf diese Grundnaht wird dann eine Gußelektrode gleicher Zusammensetzung wie der Gußstab zum Ausfüllen aufgeschmolzen, so daß bei Versuchen die damit erlangte Schweiße folgende analytisch bestimmte Zusammensetzung ergab 1. unmittelbar über der Grundeinschmelzung: 2,8 % Kohlenstoff (1,72 °/o gebundener Kohlenstoff und 1,08 °/o Graphit), 0,68 °/o Mangan, 0,8120/, Phosphor, 0,0320/, Schwefel, Rest Eisen; 2. nach mehrmaligem Gebrauch der Gießform an der dem flüssigen Gießmetall ausgesetzten Oberfläche 2,040/, Kohlenstoff (0,640/0 gebundener Kohlenstoff und 1,40/, Graphit), 0,760/, Silizium, 1,20/0 Mangan, 0,648 °/o Phosphor, 0,048 °/o Schwefel, Rest Eisen.In order to remedy this deficiency, it has already become known to remove this carbon and graphitic zone, according to which a current-carrying steel electrode made of 0.09 to 0.12% carbon, 0.03% silicon, 0.6 to 0.6 to serve as the edge formation seam 0.7% manganese, 0.02 to 0.0250 /, phosphorus, 0.02 to 0.030 /, sulfur, remainder iron, is electrically welded, in the arc of which a cast rod made of 3.3 "/, carbon, 3 , 4 "/, silicon, 0.55 % manganese, 0.650 /, phosphorus, 0.070 /, sulfur, remainder iron, is also melted off, which allow sufficient basic adhesion to the material of the casting mold to be achieved. A cast electrode of the same composition as the cast rod is then melted onto this base seam for filling purposes, so that in tests the weld obtained with it resulted in the following analytically determined composition: 1. immediately above the base seal: 2.8 % carbon (1.72% bonded carbon and 1.08% graphite), 0.68 % manganese, 0.8120 /, phosphorus, 0.0320 /, sulfur, remainder iron; 2. after repeated use of the casting mold on the surface exposed to the liquid casting metal 2.040 /, carbon (0.640 / 0 bonded carbon and 1.40 /, graphite), 0.760 /, silicon, 1.20 / 0 manganese, 0.648% phosphorus , 0.048% sulfur, remainder iron.
Obwohl die verschweißten Elektroden vorgenannter Zusammensetzung beim Auftragschweißen oberflächenverbrannter Gießformen infolge eines anderen Gefüges als des Materials der Gießform zu mosaikartig verlaufenden Spannungsrissen neigen, ähnlich der-Brandrisse einer Gießform nach mehrmaliger Benutzung, genügt eine derartige Schweißung den an die Gießform für normale Gießtemperaturen gestellten Anforderungen.Although the welded electrodes have the aforementioned composition Overlay welding of burnt-out casting molds due to a different structure as of the casting mold material tend to form tessellated stress cracks, similarly the fire cracks of a casting mold after repeated use, such a type is sufficient Welding meets the requirements placed on the casting mold for normal casting temperatures.
Bei höheren Beanspruchungen der Gießform z. B. beim Vakuumverfahren zeigt sich aber, daß die Schweiße mit Elektroden bekannter Zusammensetzungen durch das flüssige Gießmetall angegriffen wird und von der Grundnaht abblättert, d. h., die Schweiße schmilzt nicht, sondern sie löst sich durch die erhöhte Hitzeeinwirkung von der Grundnaht ab.With higher loads on the mold z. B. in the vacuum process but shows that the welding with electrodes of known compositions by the liquid casting metal is attacked and flakes off the base seam, d. H., the sweat does not melt, but it loosens due to the increased heat exposure from the base seam.
Aufgabe vorliegender Erfindung ist es nun, ein Verfahren zur Herstellung einer Auftrags- und Verbindungsschweißung, insbesondere bei schadhaft gewordenen Gießformen (Stahlwerkskokillen) für den Vakuumguß mittels eines elektrischen Lichtbogens ohne Vorwärmung des Werkstückes unter Verwendung einer stromführenden Stahlelektrode, in deren Lichtbogen ein Zusatzgußstab mit abgeschmolzen wird, zu schaffen, das die bekannten Mängel nicht aufweist.The object of the present invention is now to provide a method for production a build-up and connection weld, especially if it has become damaged Casting molds (steelworks chills) for vacuum casting by means of an electric arc without preheating the workpiece using a current-carrying steel electrode, in the arc of which an additional cast rod is melted to create the does not have known defects.
Diese Aufgabe wird dadurch gelöst, daß zur Bildung der Grundnaht eine Stahlelektrode aus 0,16 °/o Kohlenstoff, 0,2% Silizium, 0,98°% Mangan, 0,014% Phosphor, 0,010/0 Schwefel, 0,06 °/o Chrom, 0,43 °/o Molybdän, 0,12°/o Kupfer, Rest Eisen, gleichzeitig mit einem Zusatzgußstab aus 3,30/0 Kohlenstoff, 3,00/0 Silizium, 0,40/, Mangan, 0,15 °/o Phosphor, 0,05 °/o Schwefel, Rest Eisen, verschmolzen wird.This object is achieved in that a steel electrode made of 0.16% carbon, 0.2% silicon, 0.98% manganese, 0.014% phosphorus, 0.010 / 0 sulfur, 0.06% Chromium, 0.43% molybdenum, 0.12% copper, remainder iron, at the same time with an additional cast rod of 3.30 / 0 carbon, 3.00 / 0 silicon, 0.40 /, manganese, 0.15 % Phosphorus, 0.05% sulfur, the remainder iron.
Durch diese Maßnahme, insbesondere durch die Senkung des Phosphorgehaltes und durch Hinzufügung von Molybdän, Chrom und Kupfer in der Stahlelektrode ergab eine Analyse des Einschweißgutes der Grundnaht folgende Zusammensetzung: 2,3 °/o Kohlenstoff, 2,23 °/o Silizium, 0,59 °/o Mangan, 0,226 °/o Phosphor, 0,048 % Schwefel, 0,04 °/o Chrom, 0,310/0 Molybdän, 0,09 °/o Kupfer, Rest Eisen.By this measure, in particular by lowering the phosphorus content and by adding molybdenum, chromium and copper in the steel electrode, an analysis of the welded material of the basic seam showed the following composition: 2.3% carbon, 2.23% silicon, 0, 59 per cent manganese, 0.226 per cent phosphorus, 0.048 per cent sulfur, 0.04 per cent chromium, 0.310 per cent molybdenum, 0.09 per cent copper, the remainder iron.
Diese Zusammensetzung der Schweiße gewährleisfet eine genügende Hitzebeständigkeit und Haftung der Schweiße der Grundnaht, und zwar sowohl auf dem Werkstoff der Gießform als auch mit dem Auffüllgut der Gußelektrode auch bei Anwendung des Vakuumgießverfahrens, so daß bei gutem handwerklichem Können eine dauerhafte Instandsetzung von durch Auswaschungen und Verbrennung beschädigten Gießformen möglich ist.This composition of the weld ensures sufficient heat resistance and adhesion of the weld of the base seam, both on the material of the casting mold as well as with the filling material of the cast electrode also when using the vacuum casting process, so that with good craftsmanship a permanent repair of by Leaching and burning of damaged molds is possible.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DESCH24943A DE1117362B (en) | 1958-11-03 | 1958-11-03 | Process for the production of a build-up and connection welding, in particular in the case of defective casting molds (steelworks molds) for vacuum casting by means of an electric arc without preheating of the workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DESCH24943A DE1117362B (en) | 1958-11-03 | 1958-11-03 | Process for the production of a build-up and connection welding, in particular in the case of defective casting molds (steelworks molds) for vacuum casting by means of an electric arc without preheating of the workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1117362B true DE1117362B (en) | 1961-11-16 |
Family
ID=7430024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DESCH24943A Pending DE1117362B (en) | 1958-11-03 | 1958-11-03 | Process for the production of a build-up and connection welding, in particular in the case of defective casting molds (steelworks molds) for vacuum casting by means of an electric arc without preheating of the workpiece |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1117362B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3010274A1 (en) * | 1980-03-18 | 1981-09-24 | Rolf Prof. Dr.-Ing. 5650 Solingen Seybold | Welding of steel or cast iron - where weld deposit consists of alternate martensite layers, and layers contg. no martensite, so shrinkage and internal stress are minimised |
-
1958
- 1958-11-03 DE DESCH24943A patent/DE1117362B/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| None * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3010274A1 (en) * | 1980-03-18 | 1981-09-24 | Rolf Prof. Dr.-Ing. 5650 Solingen Seybold | Welding of steel or cast iron - where weld deposit consists of alternate martensite layers, and layers contg. no martensite, so shrinkage and internal stress are minimised |
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