DE686426C - Process for the production of an erosion-proof protective coating on spark plug electrodes - Google Patents
Process for the production of an erosion-proof protective coating on spark plug electrodesInfo
- Publication number
- DE686426C DE686426C DE1938W0102884 DEW0102884D DE686426C DE 686426 C DE686426 C DE 686426C DE 1938W0102884 DE1938W0102884 DE 1938W0102884 DE W0102884 D DEW0102884 D DE W0102884D DE 686426 C DE686426 C DE 686426C
- Authority
- DE
- Germany
- Prior art keywords
- spark plug
- erosion
- production
- protective coating
- proof protective
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000000034 method Methods 0.000 title claims description 4
- 239000011253 protective coating Substances 0.000 title claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims description 2
- 230000008018 melting Effects 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/39—Selection of materials for electrodes
Landscapes
- Spark Plugs (AREA)
Description
Verfahren zur Herstellung eines abbrandfesten Schutzüberzuges auf Zündkerzenelektroden Den Gegenstand der Erfindung bildet ein Verfahren zur Herstellung eines abbrandfesten Schutzüberzuges auf Zündkerzenelektroden, wie sie in bekannter Weise entweder als Mittelelektrode im Isolierkörper oder als Minuselektrode im metallischen Zündkerzenkörper eingebettet sind.Process for the production of an erosion-resistant protective coating Spark plug electrodes The subject matter of the invention is a method of production an erosion-proof protective coating on spark plug electrodes, as is known in prior art Way either as a center electrode in the insulator or as a negative electrode in the metallic one Spark plug bodies are embedded.
Für diese Elektroden müssen bekanntlich legierte Spezialstähle von besonderer Hitzebeständigkeit verwendet werden, damit der Abbrand der Elektroden, der durch die hohen Temperaturen im Zylinder der Verbrennungsmotoren erfolgt, auf ein möglichst geringes Maß beschränkt bleibt.As is well known, alloyed special steels from special heat resistance can be used so that the electrodes, which occurs due to the high temperatures in the cylinder of the internal combustion engine as low as possible remains limited.
Die Erfindung bezweckt diesen Abbrand noch weiter zu reduzieren oder sozusagen ganz auszuschließen dadurch, daß der Elektrodenstab allseitig mit einem Gemisch aus auf Schmelztemperatur gebrachtem keramischem Stoff und Wolframpulver überzogen ist. Dieses Gemisch ist durch seine Zusammensetzung so geartet, daß es durch seine keramischen Bestandteile dem Abbrand den größten Widerstand entgegensetzt, trotzdem aber durch das metallische Wolfram die Leitfähigkeit der Elektrode bewahrt. Auf solche Art vor dem Abbrand geschützte metallische Elektrodenstäbe können dann auch aus einem Ersatzmaterial an Stelle der bisher ausschließlich verwendeten kochqualifizierten Spezialstähle hergestellt werden.The invention aims to reduce this burnup even further or so to speak completely excluded by the fact that the electrode rod on all sides with a Mixture of ceramic material brought to melting temperature and tungsten powder is covered. Due to its composition, this mixture is such that it offers the greatest resistance to burn-off thanks to its ceramic components, Nevertheless, the conductivity of the electrode is retained by the metallic tungsten. In such a way protected from the burn-off metallic electrode rods can then also from a substitute material instead of the previously exclusively used cook-qualified Special steels are manufactured.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1938W0102884 DE686426C (en) | 1938-02-12 | 1938-02-12 | Process for the production of an erosion-proof protective coating on spark plug electrodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1938W0102884 DE686426C (en) | 1938-02-12 | 1938-02-12 | Process for the production of an erosion-proof protective coating on spark plug electrodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE686426C true DE686426C (en) | 1940-01-10 |
Family
ID=7615845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1938W0102884 Expired DE686426C (en) | 1938-02-12 | 1938-02-12 | Process for the production of an erosion-proof protective coating on spark plug electrodes |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE686426C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19631985A1 (en) * | 1996-08-08 | 1998-02-19 | Bosch Gmbh Robert | Electrode with a wear-resistant coating, spark plug and process for its manufacture |
-
1938
- 1938-02-12 DE DE1938W0102884 patent/DE686426C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19631985A1 (en) * | 1996-08-08 | 1998-02-19 | Bosch Gmbh Robert | Electrode with a wear-resistant coating, spark plug and process for its manufacture |
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