EP0108877B1 - Method of applying protective coatings to the surfaces of tools and devices - Google Patents

Method of applying protective coatings to the surfaces of tools and devices Download PDF

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Publication number
EP0108877B1
EP0108877B1 EP83108620A EP83108620A EP0108877B1 EP 0108877 B1 EP0108877 B1 EP 0108877B1 EP 83108620 A EP83108620 A EP 83108620A EP 83108620 A EP83108620 A EP 83108620A EP 0108877 B1 EP0108877 B1 EP 0108877B1
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Prior art keywords
wear
hard metal
metal particles
tools
weight
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EP83108620A
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German (de)
French (fr)
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EP0108877A1 (en
Inventor
Atilla Dr.Ing. Akyol
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RABEWERK GMBH + CO. TE BAD ESSEN, BONDSREPUBLIEK D
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Rabewerk Heinrich Clausing
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Priority to AT83108620T priority Critical patent/ATE36176T1/en
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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
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material

Definitions

  • the invention relates to a method for applying wear-resistant layers on the work surfaces of tools and devices, in particular soil working tools, which are exposed to the wear.
  • wear-resistant layers are applied e.g. by welding using hard metal electrodes, by application with the help of plasma welding or by spraying (flame spraying) self-flowing metal powder.
  • these known methods for applying wear-resistant layers are all complex, and when these layers are welded on with the aid of hard metal electrodes it is added that these layers are sensitive to brittleness, cracking and breakage.
  • the hard metal layers are applied with the flame spraying of self-flowing metal powder, there is a great loss of material, and this method is equally complex. This also applies to plasma welding.
  • these methods are characterized by low cost-effectiveness when large work surfaces are to be provided with a wear-resistant coating, as is the case, for. B. is the case with plowshares or other tillage tools.
  • the treated surface should be as smooth as possible so that there is little resistance to the ground.
  • the latter generally requires post-treatment in the known method, which, since the layers are hard, is labor-intensive and time-consuming.
  • FR-A-1 126 103 a method for the coating of turbine parts is known, which are to be given increased heat resistance by the coating.
  • parts manufactured in the powder metallurgical process with a relatively large surface porosity are immersed in an aluminum melt with zirconium.
  • a method for the coating of parts exposed to wear is known from US-A-3112212.
  • the parts in the form of a strip are drawn through a molten bath made of an aluminum-zinc or aluminum-zinc-magnesium alloy with hard metal particles.
  • the coating must therefore be bendable, since it is applied to a tape, which already speaks for its low wear resistance.
  • the invention has for its object to propose a method for applying wear-resistant layers on tools and devices, which is also suitable for large-area application of smooth layers, which can be carried out with little expenditure of time and money, and for achieving smooth surfaces no after-treatment required. Another object is to make the process feasible at relatively low temperatures with the associated advantages.
  • the method according to the invention is thus characterized in that the surfaces of the tools to be coated are immersed in a molten metal bath to which hard metal particles have been added to such an extent that a not inconsiderable part of the hard metal particles does not dissolve. Furthermore, the base alloy boron and / or silicon is added to lower the melting point.
  • a layer is deposited on the surfaces, which can be up to 3 mm in one operation, this layer depending on the molten metal and the temperature of the molten bath.
  • This layer, which is deposited on the work surfaces has a smooth surface on the one hand and, on the other hand, a wear resistance which is three times the usual, in particular for ploughshare.
  • An alloy based on nickel and iron is particularly suitable as the metal alloy to which hard metal particles are added.
  • This molten metal z. B. boron and silicon in amounts up to 9%, so that the melting temperature of this melt is lowered. It is thus easy to obtain a liquidus temperature of the melt of 1,100 ° C for a metal melt based on nickel and a liquidus temperature of 1,250 ° C for a metal alloy based on iron.
  • the hard metal particles which can consist of tungsten, chromium or else mixed carbides of molybdenum, titanium and tantalum carbides, are then introduced into this metal melt based on nickel or iron.
  • the amount of carbides added depends on the desired wear resistance of the applied layers and can advantageously be up to 45% of the weight of the molten metal.
  • tungsten carbide 10-20% chromium carbide and 7-8% molybdenum, titanium and tantalum mixed carbides are added to this alloy.
  • the dipping process can be repeated a further or any number of times after the first applied layer has cooled.
  • the layers applied not only have the advantage that they are smooth and therefore do not require any post-treatment, but also the advantage that they can still be forged so that the tools can then be deformed.
  • the molten bath temperature As far as the molten bath temperature is concerned, it will be at least 100 ° higher than the liquidus temperature of the molten metal, whereby it has proven advantageous to preheat the tools before the dipping process, since then a better connection is formed between the surface of the tool and the applied layer. Furthermore, for a good bond, it is a prerequisite that the dipped tools are scale-free and rustproof, which can be done in a simple manner by pretreating the tools with sandblasting.
  • a metal melt based on iron has the advantage that it is cheaper and has a better connection with the metal of the tool.
  • this melt also has the disadvantage that it tends to crack.
  • a nickel-based melt has the advantage that it requires a lower melt bath temperature and shows a higher wear resistance than the iron-based melt.
  • such a melt is more expensive in terms of cost.
  • the tool can also be provided with a hard metal layer beforehand, which e.g. can be done by immersing the tool in a hard metal powder or by applying the hard metal particles using a magnetic and / or electrostatic method. It is also conceivable to use the vortex sintering method for applying the hard metal particles to the tool surfaces, it being possible for a corresponding binder to be applied to the tool surfaces. The tools are then immersed in the molten metal.

Abstract

A method for applying a wear-resistant coating to a working surface of an object, which working surface is to be exposed to wear. To coat the object, it is dipped in a bath of molten metal containing unmolten hard metal carbide particles dispersed therein, whereby a coating is formed on the object.

Description

Die Erfindung betrifft ein Verfahren zum Auftragen von verschleissfesten Schichten auf dem Verschleiss ausgesetzten Arbeitsflächen von Werkzeugen und Vorrichtungen, insbesondere von Bodenbearbeitungswerkzeugen.The invention relates to a method for applying wear-resistant layers on the work surfaces of tools and devices, in particular soil working tools, which are exposed to the wear.

Es ist bekannt, bei Werkzeugen auf den Stellen verschleissfeste Schichten aufzubringen, die einem hohen Verschleiss ausgesetzt sind. Das Auftragen dieser verschleissfesten Schichten erfolgt z.B. durch Aufschweissen mittels Hartmetallelektroden, durch Auftragung mit Hilfe des Plasmaschweissens oder aber durch Aufspritzen (Flammspritzen) von selbstfliessendem Metallpulver. Diese bekannte Verfahren zum Auftragen verschleissfester Schichten sind jedoch allesamt aufwendig, wobei beim Aufschweissen dieser Schichten mit Hilfe von Hartmetallelektroden hinzu kommt, dass diese Schichten spröde, riss- und bruchempfindlich sind. Beim Auftragen der Hartmetallschichten mit Hilfe des Flammspritzens von selbstfliessendem Metallpulver tritt ein grosser Materialverlust ein, zudem ist dieses Verfahren gleichermassen aufwendig. Dies trifft auch für das Plasmaschweissen zu.It is known to apply wear-resistant layers to the locations of tools that are exposed to high wear. These wear-resistant layers are applied e.g. by welding using hard metal electrodes, by application with the help of plasma welding or by spraying (flame spraying) self-flowing metal powder. However, these known methods for applying wear-resistant layers are all complex, and when these layers are welded on with the aid of hard metal electrodes it is added that these layers are sensitive to brittleness, cracking and breakage. When the hard metal layers are applied with the flame spraying of self-flowing metal powder, there is a great loss of material, and this method is equally complex. This also applies to plasma welding.

Insbesondere zeichnen sich diese Verfahren durch eine geringe Wirtschaftlichkeit aus, wenn grosse Arbeitsflächen mit einer verschleissfesten Beschichtung versehen werden sollen, wie dies z. B. bei Pflugscharen oder auch sonstigen Bodenbearbeitungswerkzeugen der Fall ist. Darüberhinaus ist es gerade bei Pflugscharen erforderlich, dass die behandelte Oberfläche möglichst glatt sein soll, damit dem Boden ein geringer Widerstand entgegengesetzt wird. Letzteres erfordert jedoch bei dem bekannten Verfahren in der Regel eine Nachbehandlung, die, da es sich um harte Schichten handelt, arbeitsintensiv und zeitaufwendig ist.In particular, these methods are characterized by low cost-effectiveness when large work surfaces are to be provided with a wear-resistant coating, as is the case, for. B. is the case with plowshares or other tillage tools. In addition, especially with ploughshare, it is necessary that the treated surface should be as smooth as possible so that there is little resistance to the ground. However, the latter generally requires post-treatment in the known method, which, since the layers are hard, is labor-intensive and time-consuming.

Aus der FR-A-1 126 103 ist ein Verfahren für die Beschichtung von Turbinenteilen bekannt, die durch die Beschichtung eine erhöhte Wärmefestigkeit erhalten sollen. Zu diesem Zweck werden im pulvermetallurgischen Verfahren hergestellte Teile mit einer relativ grossen Oberflächenporosität in eine Aluminiumschmelze getaucht, der Zirkon beigesetzt ist. Desweiteren ist aus der US-A-3112212 ein Verfahren für die Beschichtung von dem Verschleiss ausgesetzten Teilen bekannt. Die in Form eines Bandes vorliegenden Teile werden durch ein geschmolzenes Bad aus einer Aluminium-Zink- oder Aluminium-Zink-Magnesium-Legierung mit Hartmetallteilchen gezogen. Die Beschichtung muss also, da diese auf ein Band aufgetragen wird, biegbar sein, was bereits für eine geringe Verschleissfestigkeit derselben spricht.From FR-A-1 126 103 a method for the coating of turbine parts is known, which are to be given increased heat resistance by the coating. For this purpose, parts manufactured in the powder metallurgical process with a relatively large surface porosity are immersed in an aluminum melt with zirconium. Furthermore, a method for the coating of parts exposed to wear is known from US-A-3112212. The parts in the form of a strip are drawn through a molten bath made of an aluminum-zinc or aluminum-zinc-magnesium alloy with hard metal particles. The coating must therefore be bendable, since it is applied to a tape, which already speaks for its low wear resistance.

Aus der EP-A-007 664 ist ein Verfahren zum Beschichten und Löten von Werkstücken mit Hartmetall-Legierungen bekannt, wobei die Hartmetall-Legierungen in einer Form in Pulver oder körnigem Zustand, gegebenenfalls unter Zusatz von Bindern, auf die zu beschichtenden Werkstücke in der gewünschten Schichtdicke aufgebracht, die Schichtdicke gegebenenfalls durch Abstandshalter eingestellt und erhitzt werden. Diese Erhitzung kann auch unter Druck erfolgen. Als Pulver oder körniges Beschichtungsmaterial werden selbstfliessende Hartmetall-Legierungen auf Ni- oder Cu-Basis versetzt mit B-Si und/oder P oder Gemischen aus Hartmetall-Legierungen und aus Hartstoffen eingesetzt.From EP-A-007 664 a method for coating and soldering workpieces with hard metal alloys is known, the hard metal alloys in a form in powder or granular state, optionally with the addition of binders, to the workpieces to be coated in the desired layer thickness applied, the layer thickness may be adjusted by spacers and heated. This heating can also take place under pressure. Self-flowing hard metal alloys based on Ni or Cu mixed with B-Si and / or P or mixtures of hard metal alloys and hard materials are used as powder or granular coating material.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren für das Aufbringen von verschleissfesten Schichten auf Werkzeugen und Vorrichtungen vorzuschlagen, das auch für ein grossflächiges Auftragen glatter Schichten geeignet ist, das mit einem geringen Zeit- und Kostenaufwand durchgeführt werden kann und das für die Erzielung glatter Oberflächen keinerlei Nachbehandlung bedarf. Eine weitere Aufgabe besteht darin, das Verfahren bei relativ niedrigen Temperaturen mit den damit verbundenen Vorteilen durchführbar zu machen.The invention has for its object to propose a method for applying wear-resistant layers on tools and devices, which is also suitable for large-area application of smooth layers, which can be carried out with little expenditure of time and money, and for achieving smooth surfaces no after-treatment required. Another object is to make the process feasible at relatively low temperatures with the associated advantages.

Diese Aufgabe wird mit den Merkmalen der Ansprüche 1 und 3 gelöst.This object is achieved with the features of claims 1 and 3.

Das erfindungsgemässe Verfahren zeichnet sich somit dadurch aus, dass die zu beschichtenden Oberflächen der Werkzeuge in ein Metallschmelzbad eingetaucht werden, dem Hartmetallteilchen in einem solchen Umfange zugesetzt sind, dass ein nicht unbeachtlicher Teil der Hartmetallteilchen nicht in Lösung geht. Desweiteren ist der Basislegierung Bor und/oder Silicium zur Schmelzpunkterniedrigung beigesetzt. Beim Eintauchen der Werkzeuge scheidet sich dann auf den Flächen eine Schicht ab, die in einem Arbeitsgang bis zu 3 mm betragen kann, wobei diese Schicht von der Metallschmelze sowie der Schmelzbad-Temperatur abhängt. Diese sich auf den Arbeitsflächen ablagernde Schicht weist zum einen eine glatte Oberfläche auf und darüberhinaus eine Verschleissfestigkeit, die insbesondere bei Pflugscharen das Dreifache der üblichen beträgt. Als Metallegierung, zu der Hartmetallteilchen zugesetzt werden, eignet sich insbesondere eine Legierung auf Basis von Nickel und Eisen. Dieser Metallschmelze werden z. B. Bor und Silicium in Mengen bis zu 9% zugegeben, damit die Schmelztemperatur dieser Schmelze erniedrigt wird. Es ist so ohne weiteres für eine Metallschmelze auf Nickelbasis eine Liquidus-Temperatur der Schmelze von 1.100 °C und bei einer Metallegierung auf Eisenbasis eine Liquidus-Temperatur von 1.250°C zu erhalten.The method according to the invention is thus characterized in that the surfaces of the tools to be coated are immersed in a molten metal bath to which hard metal particles have been added to such an extent that a not inconsiderable part of the hard metal particles does not dissolve. Furthermore, the base alloy boron and / or silicon is added to lower the melting point. When the tools are immersed, a layer is deposited on the surfaces, which can be up to 3 mm in one operation, this layer depending on the molten metal and the temperature of the molten bath. This layer, which is deposited on the work surfaces, has a smooth surface on the one hand and, on the other hand, a wear resistance which is three times the usual, in particular for ploughshare. An alloy based on nickel and iron is particularly suitable as the metal alloy to which hard metal particles are added. This molten metal z. B. boron and silicon in amounts up to 9%, so that the melting temperature of this melt is lowered. It is thus easy to obtain a liquidus temperature of the melt of 1,100 ° C for a metal melt based on nickel and a liquidus temperature of 1,250 ° C for a metal alloy based on iron.

In diese Metallschmelze auf Nickel- oder Eisenbasis werden dann die Hartmetallteilchen eingegeben, die aus Wolfram-, Chrom- oder aber auch aus Mischkarbiden aus Molybdän-, Titan- und Tantalkarbiden bestehen kann. Die Menge der zugegebenen Karbide hängt von der gewünschten Verschleissfestigkeit der aufgetragenen Schichten ab und kann vorteilhaft bis zu 45% des Gewichts der Metallschmelze betragen.The hard metal particles, which can consist of tungsten, chromium or else mixed carbides of molybdenum, titanium and tantalum carbides, are then introduced into this metal melt based on nickel or iron. The amount of carbides added depends on the desired wear resistance of the applied layers and can advantageously be up to 45% of the weight of the molten metal.

Eine Metallegierung, die sich als vorteilhaft herausgestellt hat, weist

  • 70-80% Nickel,
  • 10-20% Chrom,
  • 4-4,5% Bor und
  • 4-4,5% Silicium
  • Rest Verunreinigungen auf. Dieser Metallegierung sind, bezogen auf das Gewicht der Metallegierung, 5-15% Wolframkarbid und 10-20% Chromkarbid zugesetzt.
A metal alloy that has been found to be advantageous has
  • 70-80% nickel,
  • 10-20% chrome,
  • 4-4.5% boron and
  • 4-4.5% silicon
  • Rest impurities on. Based on the weight of the metal alloy, 5-15% tungsten carbide and 10-20% chromium carbide are added to this metal alloy.

Als Metallegierung auf Eisenbasis hat sich folgende Legierung als vorteilhaft herausgestellt:

  • 90% Eisen,
  • 4-4,5% Bor,
  • 4-4,5% Silicium,
  • Rest Verunreinigungen.
The following alloy has proven to be advantageous as an iron-based metal alloy:
  • 90% iron,
  • 4-4.5% boron,
  • 4-4.5% silicon,
  • Rest impurities.

Dieser Legierung sind, bezogen auf das Gewicht der Metallegierung, 10-15% Wolframkarbid, 10-20% Chromkarbid und 7-8% Molybdän-, Titan-und Tantalmischkarbide zugesetzt.Based on the weight of the metal alloy, 10-15% tungsten carbide, 10-20% chromium carbide and 7-8% molybdenum, titanium and tantalum mixed carbides are added to this alloy.

Falls die Dicke der Schicht nach dem ersten Tauchvorgang nicht ausreichend stark sein sollte, so kann der Tauchvorgang nach Erkalten der ersten aufgebrachten Schicht ein weiteres oder beliebige weitere Male wiederholt werden. Die aufgebrachten Schichten zeigen nicht nur den Vorteil, dass diese glatt sind und somit keinerlei Nachbehandlung bedürfen, sondern auch weiter den Vorteil, dass diese noch schmiedbar sind, so dass die Werkzeuge anschliessend noch verformt werden können.If the thickness of the layer is not sufficiently thick after the first dipping process, the dipping process can be repeated a further or any number of times after the first applied layer has cooled. The layers applied not only have the advantage that they are smooth and therefore do not require any post-treatment, but also the advantage that they can still be forged so that the tools can then be deformed.

Was die Schmelzbadtemperatur betrifft, so wird diese mindestens 100° höher als die Liquidustemperatur der Metallschmelze sein, wobei sich als vorteilhaft herausgestellt hat, die Werkzeuge vor dem Tauchvorgang anzuwärmen, da sich dann eine bessere Verbindung zwischen der Oberfläche des Werkzeugs und der aufgebrachten Schicht bildet. Des weiteren ist es für einen guten Verbund Voraussetzung, dass die getauchten Werkzeuge zunderfrei und rostfrei sind, was in einfacher Weise durch eine Vorbehandlung der Werkzeuge mittels Sandstrahlen erfolgen kann.As far as the molten bath temperature is concerned, it will be at least 100 ° higher than the liquidus temperature of the molten metal, whereby it has proven advantageous to preheat the tools before the dipping process, since then a better connection is formed between the surface of the tool and the applied layer. Furthermore, for a good bond, it is a prerequisite that the dipped tools are scale-free and rustproof, which can be done in a simple manner by pretreating the tools with sandblasting.

Eine Metallschmelze auf Eisenbasis zeigt zum einen den Vorteil, dass diese kostengünstiger ist und eine bessere Verbindung mit dem Metall des Werkzeuges eingeht. Allerdings zeigt diese Schmelze gleichzeitig den Nachteil, dass diese zur Rissbildung neigt. Eine Schmelze auf Nickelbasis hat den Vorteil, dass diese eine geringere Schmelzbadtemperatur erfordert und gegenüber der Schmelze auf Eisenbasis eine höhere Verschleissfestigkeit zeigt. Allerdings ist eine derartige Schmelze kostenmässig teurer.On the one hand, a metal melt based on iron has the advantage that it is cheaper and has a better connection with the metal of the tool. However, this melt also has the disadvantage that it tends to crack. A nickel-based melt has the advantage that it requires a lower melt bath temperature and shows a higher wear resistance than the iron-based melt. However, such a melt is more expensive in terms of cost.

Zusätzlich zum dem Einbringen der Hartmetallteilchen in die Metallschmelze kann das Werkzeug zuvor gleichermassen mit einer Hartmetallschicht versehen werden, was z.B. durch Eintauchen des Werkzeuges in ein Hartmetallpulver erfolgen kann oder aber durch Aufbringen der Hartmetallteilchen mittels magnetischen und/oder elektrostatischen Verfahrens. Auch ist es denkbar, das Wirbelsinterverfahren zum Auftragen der Hartmetallteilchen auf die Werkzeugflächen zu verwenden, wobei auf den Werkzeugflächen ein entsprechendes Bindemittel aufgebracht sein kann. Im Anschluss hieran werden die Werkzeuge dann in die Metallschmelze getaucht.In addition to introducing the hard metal particles into the molten metal, the tool can also be provided with a hard metal layer beforehand, which e.g. can be done by immersing the tool in a hard metal powder or by applying the hard metal particles using a magnetic and / or electrostatic method. It is also conceivable to use the vortex sintering method for applying the hard metal particles to the tool surfaces, it being possible for a corresponding binder to be applied to the tool surfaces. The tools are then immersed in the molten metal.

Claims (12)

1. A method of applying wear-resistant coatings to the surfaces of tools and devices which are subject to wear, in particular of agricultural implements, characterized in that the application of the wear-resistant coating takes place in a melting bath which consists of a metallic melt based on nickel, to which are added hard metal particles in a quantity, in percent by weight with respect to the weight of the base alloy, of from 5 to 15% tungsten carbide and from 10 to 20% chromium carbide, so that a substantial part of the hard metal particles does not dissolve.
2. A method according to Claim 1, characterized in that the nickel-based alloy has the following composition in percent by weight:
Ni 70 to 80%
Cr 10 to 20%
B 4 to 4.5%
Si 4 to 4.5%
the remainder impurities.
3. A method of applying wear-resistant coatings to the surfaces of tools and devices which are subject to wear, in particular of agricultural implements, characterized in that the application of the wear-resistant coating takes place in a melting bath which consists of a metallic melt based on iron, to which are added hard metal particles in such a quantity, in percent by weight with respect to the weight of the base alloy, of
10 to 15% tungsten carbide,
10 to 20% chromium carbide, and
7 to 8% Mo, Ti and Ta mixed carbides that a substantial part of the hard metal particles does not dissolve.
4. A method according to Claim 3, characterized in that an iron-based alloy with the following composition in percent by weight is used:
Fe 90%
B 4 to 4.5%
Si 4 to 4.5% the remainder impurities.
5. A method according to any one of Claims 1 to 4, characterized in that boron and/or silicon are added to the base alloy to lower the melting point.
6. A method according to any one of Claims 1 to 5, characterized in that before the immersion procedure the surfaces of the parts to be coated are sand-blasted.
7. A method according to any one of Claims 1 to 6, characterized in that before the immersion procedure hard metal particles are additionally applied to the surfaces to be treated.
8. A method according to Claim 7, characterized in that the application is performed in the form of grains, a powder or a pulp.
9. A method according to Claim 7 or 8, characterized in that the application takes place magnetically and/or electrostatically, where appropriate with the addition of binders.
10. A method according to Claim 7 or 8, characterized in that before the immersion procedure the part to be treated is immersed in a powder.
11. A method according to Claim 10, characterized in that the hard metal particles are applied by whirl sintering.
12. A method according to any one of Claims 1 to 11, characterized in that the tools and devices are heated before the immersion procedure.
EP83108620A 1982-09-16 1983-09-01 Method of applying protective coatings to the surfaces of tools and devices Expired EP0108877B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83108620T ATE36176T1 (en) 1982-09-16 1983-09-01 PROCESS FOR APPLYING WEAR-RESISTANT COATINGS TO WORKING SURFACES OF TOOLS AND DEVICES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3234310 1982-09-16
DE3234310 1982-09-16

Publications (2)

Publication Number Publication Date
EP0108877A1 EP0108877A1 (en) 1984-05-23
EP0108877B1 true EP0108877B1 (en) 1988-08-03

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US (1) US4510183A (en)
EP (1) EP0108877B1 (en)
AT (1) ATE36176T1 (en)
DE (1) DE3377584D1 (en)

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CN105917759A (en) * 2016-07-10 2016-09-07 石河子大学 Abrasion-resistant corrosion-resistant plow body curve surface for furrow plow
CN112941511A (en) * 2021-02-01 2021-06-11 南京信息职业技术学院 Preparation method of wear-resistant composite coating on surface of steel plate of automobile body

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US4510183A (en) 1985-04-09
ATE36176T1 (en) 1988-08-15
DE3377584D1 (en) 1988-09-08
EP0108877A1 (en) 1984-05-23

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