DE866132C - Process for joining porous metallic workpieces - Google Patents
Process for joining porous metallic workpiecesInfo
- Publication number
- DE866132C DE866132C DEB17444A DEB0017444A DE866132C DE 866132 C DE866132 C DE 866132C DE B17444 A DEB17444 A DE B17444A DE B0017444 A DEB0017444 A DE B0017444A DE 866132 C DE866132 C DE 866132C
- Authority
- DE
- Germany
- Prior art keywords
- workpieces
- metal
- porous metallic
- metallic workpieces
- steel
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/01—Selective coating, e.g. pattern coating, without pre-treatment of the material to be coated
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/067—Metallic material containing free particles of non-metal elements, e.g. carbon, silicon, boron, phosphorus or arsenic
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Description
Verfahren zum Verbinden poröser metallischer Werkstücke Die vorliegende Erfindung betrifft die Herstellung von porösen metallischen Gegenständen oder Formlingen aus Pulvermetall, insbesondere die Herstellung von Filtern oder porösen Platten, wie sie in der chemischen und Kunststoffindustrie oder für Kühlanlagen verwendet werden.Method for joining porous metallic workpieces The present The invention relates to the production of porous metallic objects or moldings from powder metal, especially the manufacture of filters or porous plates, as used in the chemical and plastics industries or for cooling systems will.
Es ist häufig erwünscht, derartige Gegenstände, insbesondere an ihren Kanten zu verbinden. Versuche dieses mittels normaler Schweiß-, Hartlöt-oder Weichlötverfahren. auszuführen., waren.. aus chemischen, metallurgischen, mechanischem oder anderen Gründen bisher erfolglos. So wurden die Schweißstellen bei porösen Platten aus gesintertem nichtrostendemStahl beiVerwendung vonSchweißdrähten aus*dem gleichen Werkstoff stark oxydiert, und zwar sowohl die Außenflächen der Sinterplatten als auch die Oberflächen der Poren. Ferner wirkte sich das Erhitzen und Abkühlen metallurgisch sehr machteilig auf die porösem Platten aus. Vor allem zeigten die Platten und die Schweißstellen starke Spannungen als Folge der Wärmedehnung und der anschließenden) Schrumpfung. Die Schmelzschweißungen waren meistens unsauber, und, sie zeigten häufig Risse.It is often desirable to have such items, especially on theirs To connect edges. Try this using normal welding, brazing, or soft soldering processes. to execute., were .. of chemical, metallurgical, mechanical or other Reasons so far unsuccessful. This is how the welds on porous panels were made of sintered stainless steel when using welding wires made from * the same material oxidizes both the outer surfaces of the sintered plates and the surfaces the pores. Furthermore, the heating and cooling had a metallurgical effect on the porous plates. Most of all the plates and the welds showed strong stresses as a result of thermal expansion and the subsequent) shrinkage. The fusion welds were mostly unclean, and they often showed cracks.
Nach der vorliegenden Erfindung werden poröse metallische Gegenstände oder Formlinge aus gesintertem pulverförmigem Metall miteinander oder mit anderen metallischen Werkstücken verbunden, indem man auf die Verbindungsstellen der zu vereinigenden Werkstücke oder Formlinge Metall spritzt. Vorzugsweise werden die Werkstücke während: der Durchführung des erfindungsgemäßen Verfahrens, in einer Vorrichtung gehalten, die gleichzeitig zum Abdecken der nicht mit Spritzmetall zu versehenen Teile dienen; kann.In accordance with the present invention, porous metallic articles are made or sintered powdered metal moldings with each other or with others metallic workpieces by looking at the connection points of the to unifying workpieces or shaped pieces of metal splashes. Preferably are the workpieces during: the implementation of the method according to the invention, held in a device that simultaneously covers the not with spray metal to be provided parts; can.
Die vorliegende Erfindung eignet sich besonders für- Filter aus, nichtkorrodierendem Stahl, bei denen als Spritzmetall ebenfalls nnchtkorrodierenderStahl verwendet wird. Versuche haben gezeigt, daß eine ausreichende Zugfestigkeit und Dehnbarkeit erzielt werden kann. Wenn auch: die Dehnbarkeit leicht etwas niedrig ausfällt, so reicht sie doch in vielen Fällen aus und sie ist jedenfalls so groß, daß, sie den geringen durch das Spritzverfahren hervorgerufenen Wärmedehnungen widersteht. Für den vorlüegenden Zweck kann. man irgendeines der bekannten Metallspritzverfahren anwenden.The present invention is particularly suitable for non-corrosive filters Steel in which non-corroding steel is also used as spray metal. Tests have shown that sufficient tensile strength and ductility are achieved can be. Even if the elasticity is a bit low, that's enough in many cases it is out, and it is so great that it is the minor one Resists thermal expansion caused by the spraying process. For the present Purpose can. use any of the known metal spraying techniques.
Während dies Befestigungsvorganges werden die Werkstücke nur verhältnismäßig gering erwärmt. Jedenfalls ist die Temperaturerhöhung nicht so groß, da3 eine Oxydation oder die bei Anwendung der Schweißverfahren auftretenden metallurgischen Veränderungen und Wärmespannungen zu befürchten sind. Es tritt eine geringe Schrumpfung des aufgespritzten Metalls ein, so daß die Verbin:-dungsstelle aus aufgespritztem Metall eine geringe bleibende, Zugspannung erhält. Beim. Aufspritzen des Metalls auf die Verbindungsstelle wird die Oberfläche der beiden Werkstücke zunächst mit Spritzmetall überzogen, der Spalt zwischen beiden überbrückt und die damit erzielte einheitliche Fläche bis zur gewünschten Stärke aufgebaut. Die porösen Metallformlinge haben, gewöhnlich eine .günstige Verbindungsfläche zur Aufnahme. des aufgespritzten Metalls. Werden aber massive Metallgegerustän@de verwendet, so isfi die Oberfläche zweckmäßig aufzurauhen, beispielsweise mittels Sandstrahlgebläses oder durch maschinellesSchruppen oder Kordeln, wie es auf dem Gebiet der metallischen Oberflächenbehandlung bekannt ist. Natürlich kann; man, auch poröse Werkstücke aufraühen, wenn es für erforderlich gehalten, wird.During this fastening process, the workpieces are only proportionately slightly heated. In any case, the increase in temperature is not so great as to cause oxidation or the metallurgical changes that occur when the welding process is used and thermal stresses are to be feared. There is a slight shrinkage of the sprayed Metal, so that the connection point of sprayed-on metal has a low permanent, tensile stress is maintained. At the. Spraying the metal onto the joint the surface of the two workpieces is first coated with spray metal, the Gap bridged between the two and the resulting uniform area up built to the desired strength. The porous metal blanks usually have a .favorable connection surface for the recording. of the sprayed metal. Will but massive metal frameworks are used, so it is advisable to roughen the surface, for example by means of a sandblasting blower or by machine roughing or Cords, as it is known in the field of metallic surface treatment. Of course you can; you can also roughen porous workpieces if necessary is held.
Claims (2)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB866132X | 1950-11-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE866132C true DE866132C (en) | 1953-02-09 |
Family
ID=10610019
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEB17444A Expired DE866132C (en) | 1950-11-07 | 1951-11-06 | Process for joining porous metallic workpieces |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE866132C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1296479B (en) * | 1964-04-15 | 1969-05-29 | Philips Nv | Method of attaching a wall around a package of gas-permeable metallic material for use in regenerators or heat exchangers |
US4519537A (en) * | 1982-05-06 | 1985-05-28 | Daimler-Benz Aktiengesellschaft | Process for hydrogen-impermeable brazing of austenitic structural steel parts |
-
1951
- 1951-11-06 DE DEB17444A patent/DE866132C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1296479B (en) * | 1964-04-15 | 1969-05-29 | Philips Nv | Method of attaching a wall around a package of gas-permeable metallic material for use in regenerators or heat exchangers |
US4519537A (en) * | 1982-05-06 | 1985-05-28 | Daimler-Benz Aktiengesellschaft | Process for hydrogen-impermeable brazing of austenitic structural steel parts |
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