EP1290243A1 - Verfahren zur beschichtung eines metallischen bauteils - Google Patents
Verfahren zur beschichtung eines metallischen bauteilsInfo
- Publication number
- EP1290243A1 EP1290243A1 EP01940517A EP01940517A EP1290243A1 EP 1290243 A1 EP1290243 A1 EP 1290243A1 EP 01940517 A EP01940517 A EP 01940517A EP 01940517 A EP01940517 A EP 01940517A EP 1290243 A1 EP1290243 A1 EP 1290243A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- release agent
- mold
- mold release
- tool
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000000576 coating method Methods 0.000 title claims abstract description 15
- 239000011248 coating agent Substances 0.000 title claims abstract description 14
- 239000006082 mold release agent Substances 0.000 claims abstract description 30
- 238000007493 shaping process Methods 0.000 claims abstract description 7
- 238000007711 solidification Methods 0.000 claims abstract description 5
- 230000008023 solidification Effects 0.000 claims abstract description 5
- 230000007797 corrosion Effects 0.000 claims description 16
- 238000005260 corrosion Methods 0.000 claims description 16
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 239000001993 wax Substances 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 8
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 238000005242 forging Methods 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 150000002739 metals Chemical class 0.000 claims description 7
- 229910045601 alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 238000005266 casting Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- 150000007530 organic bases Chemical class 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000002994 raw material Substances 0.000 description 6
- 238000000354 decomposition reaction Methods 0.000 description 4
- 230000002401 inhibitory effect Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 150000002314 glycerols Chemical class 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 235000003441 saturated fatty acids Nutrition 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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.
- light metal components e.g. B. made of aluminum or magnesium.
- the components are usually cast, forged, extruded or extruded
- the metals mentioned and their alloys form a passivation layer on the surface, which protects them well against corrosion under normal climatic conditions. Under the influence of corrosive media such as water and salt, however, these metals are attacked to an unacceptable degree.
- the object of the invention is therefore to provide a method for the corrosion protection of light metal components which is less expensive than the prior art.
- the solution to the problem consists of the features of claim 1.
- Light metal components are usually manufactured in metal molds using elevated temperatures. In these processes, the molds are sprayed with a mold release agent before the molding process.
- the mold release agent adheres to the surface of the mold and supports the demolding of a molded component, since the adhesion between the mold and the component is reduced.
- the mold release agent commonly used in the molding process consists of 98% to 99% water, which contains between 1% and 2% of an organic base material based on waxes.
- the organic base material of the mold release agent burns into a surface of the component and has a clearly corrosion-inhibiting effect. Burning-in here means the formation of a continuous surface layer during the solidification of the component. This is firmly attached to the surface of the component and cannot be washed off. It has been shown that, depending on the type of raw material, a mold release agent with a share of organic base material of more than 15% (hereinafter called concentrated mold release agent) already has a corrosion-inhibiting effect. The corrosion-inhibiting properties increase with increasing concentration of the mold release agent on organic raw material. The best protection against corrosion is achieved by the undiluted raw material.
- the mold is only partially sprayed with concentrated mold release agent, whereas the other areas are treated with conventional, diluted mold release agent become.
- this only leads to partial corrosion protection and can be used if only certain component areas are exposed to corrosive media.
- the method according to the invention is an in situ coating of the component.
- a slightly larger amount of organic base material is required for the mold release agent to produce the component, the costs for the base material are comparatively low. No further coating process has to be introduced in this process and no further additives are added to the process.
- the method according to the invention can be used in all shaping methods for light metals, in which metallic permanent molds (which may have ceramic or hard metal layers or inserts) are used.
- the molding tools must have a temperature of at least 80 ° C., preferably 150 ° C. to 400 ° C. during the molding process in order to ensure baking on the component surface.
- B. permanent molds, pressing tools, forging tools, rolling tools, traction tools, extrusion tools or extrusion tools are suitable.
- the method according to the invention is particularly suitable for components which are produced by casting in permanent casting molds or by forging in forging tools (claims 2 and 3).
- the organic raw material is based on waxes. These include paraffins and saturated fatty acids from glycerol esters. These raw materials burn themselves particularly well into the casting skin of the component without decomposition taking place (claim 4).
- the temperature of the mold is generally maintained at a temperature between 150 ° C and 400 ° C during the molding process. If the concentrated mold release agent is sprayed onto the hot surface of the mold, the organic base materials dry at least partially. This results in the base material being fixed and leads to an even surface layer on the component surface.
- the consideration of a fixing time of up to 30 s is expedient here (claim 6).
- Light metal components made of aluminum, magnesium, zinc or alloys of these metals are particularly suitable for coating by the method according to the invention (claim 7).
- Example 2 shows the use of the method according to the invention for coating a forged component.
- a corresponding permanent casting mold with a concentrated mold release agent which consists of 30% water and 70% organic base material based on glycerol esters, is sprayed all over. After a waiting time of approx. 15 s, the water of the mold release agent has largely evaporated and the organic base material is fixed on the permanent casting mold, which is heated to approx. 250 ° C.
- the permanent casting mold is then filled with the molten magnesium alloy (magnesium melt), which has a temperature of 650 ° C., under pressure.
- the mold release agent which is fixed to the surface of the permanent casting mold, prevents the surface from being wetted by the magnesium melt during filling. In this process phase there is almost no interaction between the melt and the mold release agent.
- the magnesium melt solidifies into a component.
- the solidification process takes approx. 15 s.
- a casting skin forms on the surface of the permanent casting mold, which forms the surface of the component after removal from the mold.
- parts of the fixed release agent dissolve and burn themselves into the cast skin.
- the chemical structure of the mold release agent is not permanently damaged.
- the component is quenched in water to prevent the burned-in mold release agent from decomposing during a longer cooling phase.
- VDA Association of the German Automobile Industry
- the VDA alternating test consists of a defined series of corrosion tests according to DIN standards.
- the components are sprayed with salt for 24 hours (according to DIN 50021 SS) and then a climate change test between 120 ° C and 90% relative humidity -40 ° C for 96 h (according to DIN 50017 KFW) and finally kept under a defined climate at room temperature for 48 h.
- a visual inspection of the components shows the following:
- the uncoated component has a surface heavily encrusted with oxides. Fine surface structures can no longer be recognized.
- the component coated according to the invention remained almost unchanged, minor surface defects can only be recognized by sharp edges, where the mold release agent could only burn into the surface to a lesser extent.
- a mold release agent is sprayed onto a forging tool that has a surface temperature of 200 ° C. It consists of 85% water and 15% waxes based on paraffins.
- the mold release agent first dries on the forging tool, which leads to local fixation of the mold release agent.
- a waiting time of approx. 30 s is inserted for optimal fixation.
- An aluminum semi-finished product made of the AlMgSil alloy is preheated to approx. 370 ° C and formed into an aluminum component in the form of a tension strut in the forging tool.
- part of the wax component of the mold release agent burns into the surface of the aluminum component. Enough wax remains on the surface of the mold to ensure that the component is removed from the mold.
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)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10026338A DE10026338B4 (de) | 2000-05-26 | 2000-05-26 | Verfahren zur Beschichtung eines metallischen Bauteils |
DE10026338 | 2000-05-26 | ||
PCT/EP2001/005871 WO2001092600A1 (de) | 2000-05-26 | 2001-05-22 | Verfahren zur beschichtung eines metallischen bauteils |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1290243A1 true EP1290243A1 (de) | 2003-03-12 |
EP1290243B1 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) |
Families Citing this family (3)
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 |
DE102009023616A1 (de) | 2009-06-02 | 2010-12-09 | Daimler Ag | Verfahren zum Beschichten |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD35077A (de) * | ||||
DE35077C (de) | R. HOHLFELD in Siegen | Anordnung stehender Wasserröhrenkessel | ||
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 |
DD229278A3 (de) * | 1983-12-23 | 1985-10-30 | Grunhain Elektromotorenwerk | Druckgussverfahren fuer leichtmetalle und deren legierungen |
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 MX MXPA02011265A patent/MXPA02011265A/es not_active Application Discontinuation
- 2001-05-22 ES ES01940517T patent/ES2222378T3/es not_active Expired - Lifetime
- 2001-05-22 WO PCT/EP2001/005871 patent/WO2001092600A1/de active IP Right Grant
- 2001-05-22 EP EP01940517A patent/EP1290243B1/de not_active Expired - Lifetime
- 2001-05-22 US US10/296,622 patent/US7025111B2/en not_active Expired - Fee Related
- 2001-05-22 DE DE50103132T patent/DE50103132D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0192600A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2222378T3 (es) | 2005-02-01 |
DE10026338B4 (de) | 2004-06-09 |
WO2001092600A1 (de) | 2001-12-06 |
DE10026338A1 (de) | 2001-12-06 |
US7025111B2 (en) | 2006-04-11 |
DE50103132D1 (de) | 2004-09-09 |
MXPA02011265A (es) | 2003-04-25 |
US20040040686A1 (en) | 2004-03-04 |
EP1290243B1 (de) | 2004-08-04 |
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