DE2102190C3 - Process for the manufacture of metal parts exposed to frictional stress - Google Patents
Process for the manufacture of metal parts exposed to frictional stressInfo
- Publication number
- DE2102190C3 DE2102190C3 DE19712102190 DE2102190A DE2102190C3 DE 2102190 C3 DE2102190 C3 DE 2102190C3 DE 19712102190 DE19712102190 DE 19712102190 DE 2102190 A DE2102190 A DE 2102190A DE 2102190 C3 DE2102190 C3 DE 2102190C3
- Authority
- DE
- Germany
- Prior art keywords
- metal
- melting point
- temperature
- heat treatment
- carried out
- 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
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
-
- 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
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
-
- 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
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
Description
Die Hauptanmeldung, dessen Gegenstand sich aus Patentanspruch 1 ergibt, betrifft ein Verfahren, das den behandelten Metallteilen eine Oberfläche mit sehr guten Gleitreibungseigenschaften und hohem Widerstand gegen Verschleiß und Fressen verleiht und zu Selbstausrichtung der Werkstücke während des Betriebs führt.The main application, the subject matter of which results from claim 1, relates to a method that the treated metal parts have a surface with very good sliding friction properties and high resistance against wear and scuffing and for self-alignment of the workpieces during operation leads.
Erzielt werden diese Vorteile dadurch, daß der einer Reibungsbeanspruchung ausgesetzte Teil B elektrolytisch mit Metallschichten C und D bestimmter Dicke versehen und anschließend einer programmierten thermischen Behandlung in mindestens zwei Stufen unterworfen wird, wovon die erste bei einer Temperatur von mindestens 20° C unterhalb des Schmelzpunktes des am niedrigsten schmelzenden der vorhandenen Metalle und die letzte bei einer Temperatur kleiner als 800°C durchgeführt werden, und wobei oberhalb 2000C in einer nicht mehr als 7% Sauerstoff enthaltenden Atmosphäre gearbeitet wird. These advantages are achieved in that the part B , which is exposed to frictional stress, is electrolytically provided with metal layers C and D of a certain thickness and then subjected to a programmed thermal treatment in at least two stages, the first of which at a temperature of at least 20 ° C below the melting point of the at the lowest melting of the metals present and the last one at a temperature of less than 800 ° C, and working above 200 0 C in an atmosphere containing no more than 7% oxygen.
Durch vorliegende Erfindung wird die Aufgabe gelöst, die programmierte thermische Behandlung in der zweiten, bei höherer Temperatur durchgeführten Stufe bei relativ niedrigen Temperaturen zu bewirken. Der Gegenstand der Erfindung wird durch die Patentansprüche näher gekennzeichnet.The present invention solves the problem of the programmed thermal treatment in to effect the second stage carried out at a higher temperature at relatively low temperatures. The subject matter of the invention is characterized in more detail by the patent claims.
Das erfindungsgemäße Verfahren ist nicht nur aus wirtschaftlichen Gründen vorteilhaft, sondern auch deshalb, weil das Teil B (hermisch weniger beansprucht wird, so daß Formänderungen und Verziehungen an diesem Teil B wesentlich herabgemindert bzw. ganz vermieden werden, und weil die Gefahr einer eventuellen Oxydation stark herabgesetzt istThe method according to the invention is advantageous not only for economic reasons, but also because part B (is hermetically less stressed, so that changes in shape and distortions in this part B are significantly reduced or avoided entirely, and because the risk of possible oxidation is high is reduced
Die Wärmebehandlungsstufen werden vorzugsweise in neutraler oder reduzierender Atmosphäre vorgenommen, doch kann in den Fällen, wo in aufeinanderfolgenden Stufen oder durch allmähliches Erhöhen der Temperatur geglüht wird, die Behandlung in Luft bis zu der Temperatur von 2000C begonnen werden unter der Bedingung, daß in einer Umgebung mit vermindertem, 7% nicht übersteigendem Gehalt an freiem Sauerstoff fortgesetzt wird.The heat treatment steps are preferably carried out in a neutral or reducing atmosphere, but in cases where the annealing is carried out in successive steps or by gradually increasing the temperature, the treatment can be started in air up to the temperature of 200 ° C. on the condition that in continued in an environment with reduced free oxygen content not exceeding 7%.
Die Gesamtdauer der thermischen Behandlung kann 8 Stunden und mehr erreichen und sie wird in jedem besonderen Falle als Funktion der Dicken der Metallüberzüge C und D und gegebenenfalls E, die ursprünglich am Werkstflcksteil B vorgesehen wurden, eingestellt zur Erzielung einer Verbundschicht, wie sieThe total duration of the thermal treatment can reach 8 hours and more and it is adjusted in each particular case as a function of the thicknesses of the metal coatings C and D and optionally E, which were originally provided on the workpiece part B , in order to obtain a composite layer like them
-!■-' im Hauptpatent näher erläutert ist-! ■ - 'is explained in more detail in the main patent
In den Fallen, in denen das Teil Beine größere Menge an Metall Centhält, z. B. eine Legierung mit 60—993% des Metalls Cist, kann auf dem Werkstück B direkt die Schicht aus Metall D aufgebracht werden und dieIn those cases where the leg part holds a large amount of metal cents, e.g. B. an alloy with 60-993% of the metal C, the layer of metal D can be applied directly to the workpiece B and the
-'» Wärmebehandlung wird dann in vorteilhafter Weise zwischen dem Schmelzpunkt des Metalls Cund 350° C in einem Bad aus mindestens einem geschmolzenen Salz durchgeführt- '»Heat treatment is then carried out in an advantageous manner between the melting point of the metal C and 350 ° C in a bath of at least one molten salt carried out
«ι erläutern ohne sie zu beschränken. Die Versuche wurden nach dem sogenannten Faville-Levally-Verfahren durchgeführt an Probekörpern a aus dem Teil B mit einem Durchmesser von 635 mm, welche zwischen Backen b und c, die 90°-V-förmige Einschnitte«Ι explain without restricting them. The tests were carried out according to the so-called Faville-Levally method on test specimens a from part B with a diameter of 635 mm, which between jaws b and c, the 90 ° V-shaped incisions
*"> aufweisen, eingespannt sind. Die Kraft P, welche die Backen b und c gegen den Probekörper a drückt, wird in Newton (N) gsmessen; das umgebende Medium ist Wasser; die Gleitgeschwindigkeit beträgt 0,1 m/s.The force P, which presses the jaws b and c against the specimen a , is measured in Newtons (N) g; the surrounding medium is water; the sliding speed is 0.1 m / s.
.,„ B e i s ρ i e 1 1., "B e i s ρ i e 1 1
Auf einen Probekörper aus einer Aluminiumlegierung der Zusammensetzung 4% Cu, 1 % Mg und 95% Al wird zunächst auf elektrolytischem Wege Kupfer (Metall C) und danach Indium (Metall D) aufgebracht Das auf Copper (metal C) and then indium (metal D) are first applied electrolytically to a test specimen made from an aluminum alloy with the composition 4% Cu, 1% Mg and 95% Al
·« diese Weise beschichtete Probestück B wird anschließend thermisch behandelt, wobei die maximal erreichte Temperatur 180° C ist. Nach diesen Behandlungen weist das Teil auf der Oberfläche eine erfindungsgemäß erzeugte Schicht auf, wodurch es möglich ist, das Teil im Sample B coated in this way is then thermally treated, the maximum temperature reached being 180 ° C. After these treatments, the part has a layer produced according to the invention on the surface, which makes it possible to use the part in the
■>'» angegebenen Test zwischen Stahlbacken in Anwesenheit von Wasser während 1 h 30 min unter einer Kraft von 500 N reiben zu lassen. Der hierbei gemessene Reibungskoeffizient beträgt 0,25.■> '»specified test between steel jaws in the presence let rub by water for 1 h 30 min under a force of 500 N. The measured here Coefficient of friction is 0.25.
Vt Beispiel 2 Vt Example 2
Auf einen Probekörper aus Bronze mit einem Gehalt an 12% Zinn, Rest Kupfer (als Metall C) wird ein Überzug aus Zinn (Metall D) aufgebracht und der überzogene Probekörper wird sodann einer thermi-A coating of tin (metal D) is applied to a specimen made of bronze with a content of 12% tin, the remainder being copper (as metal C) and the coated specimen is then subjected to a thermal
Wl sehen Behandlung unterworfen, deren letzte Stufe in einem Bad aus aufgeschmolzenen Salzen, bestehend aus Alkalinitraten und -nitriten, bei einer Temperatur von 3300C durchgeführt wird. Nach dieser Behandlung besitzt der Probekörper ausgezeichnete Reibungseigen- Wl see treatment subjected to the final stage is carried out in a bath of molten salts consisting of alkali nitrates and nitrites, at a temperature of 330 0 C. After this treatment, the test specimen has excellent frictional properties
h'> schäften aufgrund der Bildung von Metallverbindungen auf seiner Oberfläche zwischen dem in der Bronze enthaltenen Kupfer und dem darauf aufgebrachten Zinn. h '> shafts due to the formation of metal compounds on its surface between the copper contained in the bronze and the tin deposited on it.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712102190 DE2102190C3 (en) | 1971-01-18 | 1971-01-18 | Process for the manufacture of metal parts exposed to frictional stress |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712102190 DE2102190C3 (en) | 1971-01-18 | 1971-01-18 | Process for the manufacture of metal parts exposed to frictional stress |
Publications (3)
Publication Number | Publication Date |
---|---|
DE2102190A1 DE2102190A1 (en) | 1972-08-10 |
DE2102190B2 DE2102190B2 (en) | 1979-08-23 |
DE2102190C3 true DE2102190C3 (en) | 1980-04-30 |
Family
ID=5796215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19712102190 Expired DE2102190C3 (en) | 1971-01-18 | 1971-01-18 | Process for the manufacture of metal parts exposed to frictional stress |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE2102190C3 (en) |
-
1971
- 1971-01-18 DE DE19712102190 patent/DE2102190C3/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2102190A1 (en) | 1972-08-10 |
DE2102190B2 (en) | 1979-08-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OD | Request for examination | ||
C3 | Grant after two publication steps (3rd publication) | ||
8340 | Patent of addition ceased/non-payment of fee of main patent |