EP1290243B1 - Verfahren zur beschichtung eines metallischen bauteils - Google Patents
Verfahren zur beschichtung eines metallischen bauteils Download PDFInfo
- Publication number
- EP1290243B1 EP1290243B1 EP01940517A EP01940517A EP1290243B1 EP 1290243 B1 EP1290243 B1 EP 1290243B1 EP 01940517 A EP01940517 A EP 01940517A EP 01940517 A EP01940517 A EP 01940517A EP 1290243 B1 EP1290243 B1 EP 1290243B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- shaping
- tool
- release agent
- process according
- 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 - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
-
- 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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/74—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process for obtaining burned-in conversion coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
Definitions
- the invention relates to a method for coating a metallic component with a corrosion protection layer.
- Fuel savings are especially in the automotive sector increasingly light metal components, eg. B. aluminum or Magnesium used.
- the components are usually cast, forged, extruded or extruded
- the metals mentioned and their alloys form one Passivation layer on the surface, taking it under normal climatic conditions protects well against corrosion. Under the influence of corrosion promoting media such as water and Salt, however, these metals are in unacceptable extent attacked corrosively.
- DE 34 36 846 describes a method for die casting of Light metals, in which for better removal of the component a mold release agent is applied.
- a mold release agent proposed that metal salts of based on aliphatic carboxylic acids and polyhydric alcohols.
- the object of the invention is therefore, one opposite the prior art cheaper method for the To provide corrosion protection of light metal components.
- Light metal components are usually metallic Mold tools using elevated temperatures produced.
- the molds before the molding process with a mold release agent sprayed.
- the mold release agent adheres to the surface of the Forming tool and supports the demolding of a molded Component, since the adhesion between the mold and the Component is reduced.
- the shaping process Commonly used mold release agent is 98% to 99% of water containing between 1% and 2% of an organic Base material based on waxes.
- the organic Base material of the mold release agent in a surface of the Component burns and significantly reduces corrosion. Under burning here is the emergence of a continuous surface layer during solidification understood the component. This is with the surface of the Component firmly connected and not washable. It has shown that depending on the nature of the basic material Mold release agent with a proportion of organic base material of more than 15% (hereinafter concentrated) Called mold release agent) already acts corrosion inhibiting. The corrosion-inhibiting properties increase with increasing concentration of the mold release agent organic raw material. The best corrosion protection is achieved by the undiluted raw material.
- the process according to the invention can be used in all shaping processes be applied to light metals in which metallic permanent molds (which may be ceramic or hard metal layers or inserts may have) be used.
- the molds must during the Forming a temperature of at least 80 ° C, preferably 150 ° C to 400 ° C have a burn-in on the component surface to ensure.
- molding tools are for this z.
- the temperature of the mold generally becomes during the molding process at a temperature kept between 150 ° C and 400 ° C. Will that be concentrated Mold release agent on the hot surface of the mold sprayed, so dry the organic materials at least partially on. This has a fixation of the base material to Result and leads to a uniform surface layer on the component surface.
- the consideration of a Fixing time of up to 30 s is appropriate (claim 5).
- Particularly suitable for coating by the inventive method are lightweight metal components Aluminum, magnesium, zinc or alloys of these metals (Claim 6).
- Example 2 shows the use of the method according to the invention for coating a forged component.
- a housing part for a car accessory from the magnesium alloy AS21 is a corresponding Continuous casting mold with a concentrated mold release agent, the 30% water and 70% organic matter based on glycerol ester, nationwide sprayed.
- the coating of the component surface by the Mold release agent is continuously after quenching with connected to the surface and solidified, so this ensures permanent corrosion protection. That after the inventive method coated component, and an uncoated, otherwise identical component, was the so-called VDA (Verband Academicr Automobilindustrie) -change test subjected.
- the VDA change test is taking off a defined series of corrosion tests according to DIN standards together.
- the components are sprayed with salt for 24 h (according to DIN 50021 SS) and then at 90% relative Humidity a climate change test between 120 ° C and -40 ° C for 96 h (according to DIN 50017 KFW) exposed to and Conclusion under a defined climate at room temperature 48 h held.
- the visual inspection of the components results in the following:
- the uncoated component has a surface heavily encrusted with oxides. Fine surface structures are no longer recognizable.
- the component coated in accordance with the invention remained virtually unchanged; minor surface defects can be recognized only on sharp edges, where the mold release agent was only able to burn into the surface to a lesser extent.
- a mold release agent is sprayed 85% water and 15% wax Paraffins exists.
- the mold release agent dries first on the forging tool, resulting in a local fixation of the mold release agent leads.
- For optimal fixation is a waiting time of about 30 s inserted.
- An aluminum semi-finished product made of the alloy AlMgSi1 is heated to approx. Preheated 370 ° C and in the forge to a Aluminum component formed in the form of a tension strut. While During the forming process a part of the wax constituent burns of the mold release agent into the surface of the aluminum component on. On the surface of the mold remains sufficient Wax back to ensure removal of the component.
- Example 1 By coating the aluminum surface with According to the invention baked wax this is from corrosion protected.
- the component is a corrosion test analogous to from Example 1 subjected. A comparison with one uncoated component of the same design shows the same Result as in Example 1.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Mold Materials And Core Materials (AREA)
- Coating By Spraying Or Casting (AREA)
- Forging (AREA)
Description
Das unbeschichtete Bauteil weist eine stark durch Oxide verkrustete Oberfläche auf. Feine Oberflächenstrukturen sind nicht mehr zu erkennen. Das erfindungsgemäß beschichtete Bauteil hingegen blieb nahezu unverändert, geringfügige Oberflächendefekte sind lediglich an scharfen Kanten zu erkennen, dort wo das Formtrennmittel nur in geringerem Ausmaß in die Oberfläche einbrennen konnte.
Claims (6)
- Verfahren zur Beschichtung eines Leichtmetallbauteils mit einer Korrosionsschutzschicht, wobeiein metallisches Formwerkzeug mindestens teilweise mit konzentriertem Formtrennmittel besprüht wird,das konzentrierte Formtrennmittel mindestens 15 % organische Grundstoffe auf der Basis von Wachsen aufweist,das Bauteil in dem metallischen Formwerkzeug geformt wird,wobei das Formgebungswerkzeug während der Formgebung eine Temperatur zwischen 150°C und 400°C aufweist,das konzentrierte Formtrennmittel während des Formprozesses des Bauteils in eine Oberfläche des Bauteils eingebrannt wird undhierdurch eine korrosionshemmende kontinuierliche Oberflächenschicht auf dem Bauteil gebildet wird.
- Verfahren nach Anspruch 1
dadurch gekennzeichnet, dass
als Formwerkzeug eine Dauergießform, ein Schmiedewerkzeug, ein Presswerkzeug, ein Walzwerkzeug, ein Zugwerkzeug, ein Extrudierwerkzeug oder ein Strangpresswerkzeug verwendet wird. - Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
das Formgebungswerkzeug während der Formgebung eine Temperatur zwischen 150°C und 250°C aufweist. - Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, dass
das Leichtmetallbauteil direkt nach der Formgebung abgeschreckt wird. - Verfahren nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, dass
das Formwerkzeug vor und während des Formgebungsvorgang beheizt wird und das Formtrennmittel auf dem Formwerkzeug mindestens teilweise antrocknet. - Verfahren nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, dass
das Bauteil aus Aluminium, Magnesium, Zink oder aus Legierungen dieser Metalle besteht.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10026338 | 2000-05-26 | ||
DE10026338A DE10026338B4 (de) | 2000-05-26 | 2000-05-26 | Verfahren zur Beschichtung eines metallischen Bauteils |
PCT/EP2001/005871 WO2001092600A1 (de) | 2000-05-26 | 2001-05-22 | Verfahren zur beschichtung eines metallischen bauteils |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1290243A1 EP1290243A1 (de) | 2003-03-12 |
EP1290243B1 true EP1290243B1 (de) | 2004-08-04 |
Family
ID=7643795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01940517A Expired - Lifetime EP1290243B1 (de) | 2000-05-26 | 2001-05-22 | Verfahren zur beschichtung eines metallischen bauteils |
Country Status (6)
Country | Link |
---|---|
US (1) | US7025111B2 (de) |
EP (1) | EP1290243B1 (de) |
DE (2) | DE10026338B4 (de) |
ES (1) | ES2222378T3 (de) |
MX (1) | MXPA02011265A (de) |
WO (1) | WO2001092600A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009023616A1 (de) | 2009-06-02 | 2010-12-09 | Daimler Ag | Verfahren zum Beschichten |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10338570B4 (de) * | 2003-08-22 | 2005-07-14 | Daimlerchrysler Ag | Verfahren zur Beschichtung eines metallischen Bauteils |
US7843465B1 (en) * | 2007-05-31 | 2010-11-30 | Zoran Corporation | Method and apparatus for mapping a multi-dimensional signal from one space to another space |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3436846A1 (de) * | 1983-12-23 | 1985-07-11 | VEB Elektromotorenwerk Grünhain, DDR 9437 Grünhain | Druckgussverfahren fuer leichtmetalle und deren legierungen |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE35077C (de) | R. HOHLFELD in Siegen | Anordnung stehender Wasserröhrenkessel | ||
DD35077A (de) * | ||||
DE2006095C3 (de) * | 1970-02-11 | 1979-05-10 | Motoren- Und Turbinen-Union Muenchen Gmbh, 8000 Muenchen | Verwendung eines lackförmigen Anstrichmittels |
US3963502A (en) * | 1973-02-02 | 1976-06-15 | P. R. Mallory & Co., Inc. | Composition for application to die cavity surface |
US3877141A (en) * | 1973-06-01 | 1975-04-15 | Standard Forge And Axle Compan | Method for making brake shoes |
DE3330494C1 (de) * | 1983-08-24 | 1984-07-12 | Buderus Ag, 6330 Wetzlar | Verfahren zur Herstellung von korrosionsfesten, heizgasberührten Oberflächen bei Heizungskesseln aus Gußeisen |
JPH0647163B2 (ja) * | 1986-01-27 | 1994-06-22 | 株式会社豊田中央研究所 | 複合アルミニウム部材の製造方法 |
DE3808609A1 (de) * | 1988-03-15 | 1989-09-28 | Electro Chem Eng Gmbh | Verfahren zur erzeugung von korrosions- und verschleissbestaendigen schutzschichten auf magnesium und magnesiumlegierungen |
EP0380900A1 (de) * | 1989-01-31 | 1990-08-08 | Battelle Memorial Institute | Verfahren und Vorrichtung zur Homogenisierung von unter Druck gegossenen Metallen und Legierungen |
US5076339B1 (en) * | 1990-02-08 | 1998-06-09 | J & S Chemical Corp | Solid lubricant for die-casting process |
US5279750A (en) * | 1991-03-06 | 1994-01-18 | Hanano Commercial Co., Ltd. | Method for squeeze casting powdery mold releasing agent |
JPH0890147A (ja) * | 1994-09-22 | 1996-04-09 | Sumitomo Durez Co Ltd | シェルモールド用レジンコーテッドサンド |
FR2729876B1 (fr) * | 1995-01-26 | 1997-04-18 | Fonderie Ctr Tech Ind | Procede et dispositif de controle des moyens de poteyage dans une installation de moulage |
US5662156A (en) * | 1995-12-05 | 1997-09-02 | Freeman; Lewis Gene | Method of die casting machine lubrication with unitized lubricant |
JP2849808B2 (ja) * | 1996-04-12 | 1999-01-27 | 株式会社ケーヒン | ダイカスト鋳造金型への粉体離型剤の塗布方法及びダイカスト鋳造装置 |
CA2206487A1 (en) * | 1996-05-31 | 1997-11-30 | Fritz Grensing | Composite cores and metal casting therewith |
DE19810032A1 (de) * | 1998-03-09 | 1999-09-16 | Acheson Ind Inc | Verfahren und Vorrichtung zum Vorbereiten der Formwandungen einer Form zur Urformung bzw. Umformung auf den nächstfolgenden Formungszyklus, Sprühelement mit Zentrifugalzerstäubung und Luftführung und Verwendung eines derartigen Sprühelements zum Versprühen im wesentlichen lösungsmittelfreien Formwandbehandlungsmittels |
-
2000
- 2000-05-26 DE DE10026338A patent/DE10026338B4/de not_active Expired - Fee Related
-
2001
- 2001-05-22 US US10/296,622 patent/US7025111B2/en not_active Expired - Fee Related
- 2001-05-22 ES ES01940517T patent/ES2222378T3/es not_active Expired - Lifetime
- 2001-05-22 DE DE50103132T patent/DE50103132D1/de not_active Expired - Lifetime
- 2001-05-22 EP EP01940517A patent/EP1290243B1/de not_active Expired - Lifetime
- 2001-05-22 WO PCT/EP2001/005871 patent/WO2001092600A1/de active IP Right Grant
- 2001-05-22 MX MXPA02011265A patent/MXPA02011265A/es not_active Application Discontinuation
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3436846A1 (de) * | 1983-12-23 | 1985-07-11 | VEB Elektromotorenwerk Grünhain, DDR 9437 Grünhain | Druckgussverfahren fuer leichtmetalle und deren legierungen |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009023616A1 (de) | 2009-06-02 | 2010-12-09 | Daimler Ag | Verfahren zum Beschichten |
Also Published As
Publication number | Publication date |
---|---|
ES2222378T3 (es) | 2005-02-01 |
US7025111B2 (en) | 2006-04-11 |
DE10026338A1 (de) | 2001-12-06 |
MXPA02011265A (es) | 2003-04-25 |
EP1290243A1 (de) | 2003-03-12 |
DE10026338B4 (de) | 2004-06-09 |
DE50103132D1 (de) | 2004-09-09 |
WO2001092600A1 (de) | 2001-12-06 |
US20040040686A1 (en) | 2004-03-04 |
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