EP0947605B1 - Verfahren zum Erhöhen der Korrisionsbeständigkeit eines metallischen Werkstücks sowie Werkstück - Google Patents
Verfahren zum Erhöhen der Korrisionsbeständigkeit eines metallischen Werkstücks sowie Werkstück Download PDFInfo
- Publication number
- EP0947605B1 EP0947605B1 EP99100999A EP99100999A EP0947605B1 EP 0947605 B1 EP0947605 B1 EP 0947605B1 EP 99100999 A EP99100999 A EP 99100999A EP 99100999 A EP99100999 A EP 99100999A EP 0947605 B1 EP0947605 B1 EP 0947605B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- workpiece
- blasting
- alloy
- coating
- grains
- 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
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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
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
- C23C24/04—Impact or kinetic deposition of particles
Definitions
- the invention relates to the field of surface treatment of metallic workpieces to increase the corrosion resistance of a such workpiece.
- the invention relates to a method to increase the corrosion resistance of a metallic workpiece by coating the workpiece with a material which has higher corrosion resistance with regard to the workpiece, the application of the coating to the workpiece by way of a Blasting process takes place in which grains with a spherical as the abrasive Habitus can be used.
- the invention further relates to a workpiece, coated by such a method.
- Metallic workpieces made in different ways can be, for example, by a casting or forging process coated on the surface to increase their corrosion resistance. This applies in particular to all FE metals, but can also apply to non-ferrous metals, such as aluminum alloys.
- the corrosion resistance of such a metallic workpiece can by different coatings are increased, both chemical as well as physical coating processes can be used. there come among other things vapor deposition or atomization processes as well as covering the workpieces in gases or components containing liquids. In many cases, one such material can also be galvanically coated. To perform Such a coating process requires the metallic Workpieces to be cleaned prior to coating to keep them from previous Machining residues, such as scale or lubricant residues to free.
- the physical Nature such as a cleaning blast or chemical nature, such as a Can be pickled.
- a cleaning blast or chemical nature, such as a Can be pickled.
- abrasive and chemical cleaning processes used.
- non-ferrous metals such as cast aluminum or forgings undergo a chemical cleaning process after their manufacture Pickling, which usually follows the final step of thermosetting then subjected to the removal of manufacturing residues.
- Pickling usually follows the final step of thermosetting then subjected to the removal of manufacturing residues.
- the in-line manufactured workpieces are made in Repackaged baskets and then fed to a pickling bath.
- pickling agents from ecological Not harmless for reasons, as residues from these baths a not inconsiderable amount of sludge has to be disposed of.
- one upstream of the pickling abrasive cleaning blasting can be provided, for example at Workpieces made of aluminum alloys not on a subsequent one Pickling can be dispensed with because it adheres to the surface of the workpiece Abrasive residue the corrosion resistance of such a workpiece affect.
- JP-A 61 006 283 a process for rust protection treatment a metallic insert that is used for installation in vibration protection rubber blocks is used for machine assembly. coated is this metallic insert, which usually consists of a hard metal, such as steel, with a corrosion-resistant Material such as zinc or lead.
- the coating of such Use is carried out by means of a blasting process, with zinc or lead coated steel balls can be used as blasting media. Due to the impact ("impact force") of the coated steel balls on the The surface of the insert will change as a result of moving between the Surface of the steel balls and the zinc or Lead coating defined parting surface parts of the coated material of the steel balls and due to the kinetic energy of the Steel balls connected to the surface of the insert. In this way the insert is coated with a corrosion-resistant layer.
- the invention then exists that the grains of abrasive used completely from the coating material, which has a lower hardness than the hardness of the workpiece, exist and the process parameters for performing the blasting in such a way be adjusted that due to the impact of the abrasive grains on the surface of the workpiece this surface is cleaned, a restructuring or reshaping of the outer boundary layer of the Workpiece and thus the installation of a residual pressure is carried out and the irradiated surface of the workpiece with that caused by the impact the abrasive grains are formed on the surface of the workpiece Material abrasion of the grains of the abrasive is coated.
- the workpiece is coated according to the invention by Blasting the workpiece surface, the process parameters of Blasting process (e.g .: abrasive grain, abrasive grain shape, abrasive grain composition, Blasting agent throughput, blasting duration and Beam intensity) are coordinated so that, on the one hand with respect to the workpiece to be coated is provided by the blasting a restructuring of the surface of the workpiece forming areas or a reshaping of the grain boundaries in these areas takes place.
- the material is the abrasive grains of such a nature that it has only such abrasion resistance have that by blasting the workpiece surface on the An abrasion of abrasive material is distributed approximately evenly over the surface accumulates.
- This abrasion goes with his Accumulation on the workpiece surface by continuous blasting a physical structure connection with the workpiece. After completion the blasting process is the workpiece with the abrasion material the abrasive grains are coated. This process can therefore be used as application blasting be designated. Since the invention provides that the material of the abrasive grains and thus the abrasion of the same has a higher corrosion resistance than the material of the Workpiece, is the workpiece after the end of this blasting process coated with a more corrosion-resistant material.
- the blasting process according to the invention is not just cleaning the workpiece surface but also a coating at the same time the same is done with a more corrosion-resistant material. thats why only one for the entire cleaning and coating process Method step, namely that of the blasting according to the invention necessary to a coated with a more corrosion-resistant layer To manufacture the workpiece.
- a specialist in the field of radiation is used to different Workpieces to be blasted depending on the desired ones Workpiece requirements include cleaning or tension blasting to carry out with very different beam process parameters.
- Such a specialist usually determines the beam process parameters in test series.
- a specialist does the same in the method according to the present invention, in which it easily by a series of tests depending on the material of the workpiece and the other requirements placed on it necessary parameters for performing the invention Blasting process determined. It would be beyond the scope of these statements therefore exceed specific information on the beam process parameters to make for the multitude of possible workpiece abrasive constellations.
- the abrasive grains should be dependent of their normal potential in relation to that of the surface of the Workpiece own normal potential must be selected, with the normal potential difference between the material of the surface of the workpiece and the abrasion material of the abrasive grains as far as possible is low. With a very high normal potential difference, appropriate environmental conditions a potential between the two Form materials, the material with the lower Normal potential can be damaged by its property as a sacrificial anode can.
- the workpiece according to the invention stands out, as from the description clarifies the method according to the invention, characterized in that the cleaning and coating process in a single blasting process has been carried out.
- a layer connection of the workpiece is provided, so that on using additional, establishing a connection Fabrics can be dispensed with.
- Such a structural connection is expediently a cold weld, so that a permanent Connection between the more corrosion-resistant top layer and is given to the workpiece.
- FIG. 1 shows an enlarged schematic section of a cross section through the regions of a workpiece 1 near the surface. which has been coated by a blasting process with a layer 2 which is more corrosion-resistant than the material of the workpiece 1.
- the region of the workpiece 1 near the surface, which has been restructured or solidified by the blasting process, is identified in the figure by the reference number 3.
- an AlMgSi alloy was used as the material of the workpiece with a Brinell hardness (HB) of about 100.
- HB Brinell hardness
- the workpiece was cooled down subjected to the blasting process according to the invention.
- an abrasive spherical abrasive grains were used, made of an AlMg alloy exist and have a hardness between 50 and 70 HB to have.
- the uncoated workpiece 1 is inserted into a blasting chamber and blasted in it with the abrasive mentioned above.
- the beam process parameters have been chosen so that the near-surface Area 3 is restructured to give residual compressive stress and that when the abrasive grains hit the surface of the Workpiece 3 is a grit abrasion, which is also caused by the a cold-welded joint immediately after the abrasive particles with the surface of the workpiece.
- the duration of the blasting process depends on after the abrasion resistance of the Abrasive grains, so that the blasting process is provided until a uniform coating of the workpiece 1 by the abrasive grit 2 is done.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Building Environments (AREA)
Description
A | xmax (µm) | xQ (µm) | A | xmax (µm) | xQ (µm) | A | xmax (µm) | xQ (µm) | |
Referenz 1 | 10 | 60 | 50 | 10 | 120 | 72 | <5 | 110 | 65 |
Probe 1 | <5 | 20 | 20 | <5 | 40 | 30 | <5 | 30 | 28 |
A | xmax (µm) | xQ (µm) | A | xmax (µm) | xQ (µm) | A | xmax (µm) | xQ (µm) | |
Referenz 2 | 20 | 140 | 64 | 20 | 170 | 74 | >20 | 100 | 53 |
Probe 2 | <10 | 50 | 30 | <5 | 70 | 32 | 5-10 | 40 | 34 |
- 1
- Werkstück
- 2
- Korrosionsbeständigere Beschichtung - Strahlmittelkörnerabrieb
- 3
- Umstrukturierter oberflächennaher Bereich des Werkstückes
Claims (7)
- Verfahren zum Erhöhen der Korrosionsbeständigkeit eines metallischen Werkstückes (1) durch Beschichten des Werkstückes mit einem Material (2), welches bezüglich des Werkstückes (1) eine höhere Korrosionsbeständigkeit aufweist, wobei der Auftrag der Beschichtung auf das Werkstück (1) im Wege eines Strahlvorganges erfolgt, bei dem als Strahlmittel Körner mit einem kugeligen Habitus eingesetzt werden, dadurch gekennzeichnet, daß die Körner des eingesetzten Strahlmittels vollständig aus dem Beschichtungsmaterial, welches eine geringere Härte als die Härte des Werkstückes (1) aufweist, bestehen und die Prozeßparameter zum Durchführen des Strahlens dergestalt eingestellt werden, daß infolge des Auftreffens der Strahlmittelkörner auf die Oberfläche des Werkstückes (1) diese Oberfläche gereinigt wird, eine Umstrukturierung oder Umformung der äußeren Randschicht (3) des Werkstückes (1) und somit der Einbau einer Druckeigenspannung erfolgt und die bestrahlte Oberfläche des Werkstückes (1) mit dem durch den Aufprall der Strahlmittelkörner auf der Oberfläche des Werkstückes (1) entstehenden Materialabrieb der Körner des Strahlmittels beschichtet wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Oberfläche des Werkstückes (1) mit einem Strahlmittel bestrahlt wird, wobei die Normalpotentialdifferenz zwischen dem Material der Oberfläche des Werkstückes (1) und demjenigen des Abriebs (2) der Strahlmittelkörner möglichst gering oder null ist.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Werkstück (1) aus einer AlMgSi-Legierung oder einer AlMgSiCu-Legierung und die Strahlmittelkörner aus Aluminium oder einer AlMg-Legierung bestehen.
- Metallisches Werkstück, beschichtet mit einem gegenüber dem Werkstück eine höhere Korrosionsbeständigkeit aufweisenden Material, hergestellt nach dem Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Werkstück (1) aus einer AlMgSi- oder einer AlMgSiCu-Legierung und die durch die Materialbeschichtung gebildete Schicht (2) aus reinem Aluminium oder einer AlMg-Legierung bestehen, wobei die Al-Legierung der Beschichtung korrosionsbeständiger ist als die Al-Legierung des Werkstückes (1).
- Werkstück nach Anspruch 4, dadurch gekennzeichnet, daß die äußeren Randbereiche (3) durch eine Umformung und eine Verdichtung eine Druckspannung aufweisen und daß die Oberfläche des Werkstückes (1) von einer mit dieser durch eine Gefügeverbindung verbundenen Deckschicht (2) beschichtet ist.
- Werkstück nach Anspruch 4, dadurch gekennzeichnet, daß die Gefügeverbindung zwischen der Werkstückoberfläche und der Deckschicht (2) eine Kaltschweißung ist.
- Werkstück nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, daß das Werkstück (1) ein aus einer Al-Legierung hergestellter Querlenker für ein Kraftfahrzeug ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19814218 | 1998-03-31 | ||
DE19814218A DE19814218A1 (de) | 1998-03-31 | 1998-03-31 | Verfahren zum Erhöhen der Korrosionsbeständigkeit eines metallischen Werkstückes sowie Werkstück |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0947605A1 EP0947605A1 (de) | 1999-10-06 |
EP0947605B1 true EP0947605B1 (de) | 2002-08-21 |
Family
ID=7862990
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99100999A Expired - Lifetime EP0947605B1 (de) | 1998-03-31 | 1999-01-21 | Verfahren zum Erhöhen der Korrisionsbeständigkeit eines metallischen Werkstücks sowie Werkstück |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0947605B1 (de) |
AT (1) | ATE222612T1 (de) |
DE (2) | DE19814218A1 (de) |
ES (1) | ES2182406T3 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5258098A (en) * | 1991-06-17 | 1993-11-02 | Cycam, Inc. | Method of production of a surface adapted to promote adhesion |
US10687956B2 (en) | 2014-06-17 | 2020-06-23 | Titan Spine, Inc. | Corpectomy implants with roughened bioactive lateral surfaces |
TWI726940B (zh) | 2015-11-20 | 2021-05-11 | 美商泰坦脊柱股份有限公司 | 積層製造整形外科植入物之方法 |
CA3032623A1 (en) | 2016-08-03 | 2018-02-08 | Titan Spine, Inc. | Titanium implant surfaces free from alpha case and with enhanced osteoinduction |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2618572A (en) * | 1950-11-25 | 1952-11-18 | Northrop Aircraft Inc | Method for impact plating |
DE1287402B (de) * | 1964-06-16 | 1969-01-16 | Huettenwerk Oberhausen Ag | Verfahren zum Aufbringen metallischer Korrosionsschutzschichten auf Stahloberflaechen |
US3754976A (en) * | 1971-12-06 | 1973-08-28 | Nasa | Peen plating |
DE3003045A1 (de) * | 1980-01-25 | 1981-07-30 | Zschimmer, Gero, 8000 München | Verfahren zum bearbeiten eines teils mittels eines gaspartikelstrahles |
JPS592747B2 (ja) * | 1980-12-26 | 1984-01-20 | 三井金属鉱業株式会社 | 投射メッキ用金属合金粉末および投射メッキ方法 |
JPS57140872A (en) * | 1981-02-24 | 1982-08-31 | Mitsui Mining & Smelting Co Ltd | Projection plating method |
BR8201279A (pt) * | 1982-03-10 | 1983-11-01 | J C Hempel S Skibsvarfe Fabrik | Processo e composicao para limpar superficies metalicas e protege-las coontra corrosao |
JPS59150085A (ja) * | 1983-02-17 | 1984-08-28 | Mitsubishi Heavy Ind Ltd | 亜鉛被覆鋼材の製造方法 |
JPS616283A (ja) * | 1984-06-20 | 1986-01-11 | Mitsubishi Motors Corp | 防振ゴム用金具の防錆処理工法 |
JP2963272B2 (ja) * | 1992-02-14 | 1999-10-18 | 同和鉄粉工業株式会社 | メカニカルプレーティング用投射材及びこれを使用するメカニカルプレーティング方法 |
WO1994008755A1 (en) * | 1992-10-08 | 1994-04-28 | Julius Stephen Csabai | The use of specular hematite as an impact material |
FR2710866B1 (fr) * | 1993-10-08 | 1995-12-29 | Entrepose Montalev | Procédé et installation de nettoyage de pièces revêtues. |
JP3365887B2 (ja) * | 1995-06-02 | 2003-01-14 | 株式会社不二機販 | 常温拡散・浸透メッキ方法 |
NL1004157C1 (nl) * | 1996-10-01 | 1998-04-02 | Vms Holding Ag | Werkwijze en inrichting voor het door middel van stralen aanbrengen van een laag beschermend metaal. |
-
1998
- 1998-03-31 DE DE19814218A patent/DE19814218A1/de not_active Withdrawn
-
1999
- 1999-01-21 DE DE59902392T patent/DE59902392D1/de not_active Expired - Fee Related
- 1999-01-21 ES ES99100999T patent/ES2182406T3/es not_active Expired - Lifetime
- 1999-01-21 EP EP99100999A patent/EP0947605B1/de not_active Expired - Lifetime
- 1999-01-21 AT AT99100999T patent/ATE222612T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2182406T3 (es) | 2003-03-01 |
EP0947605A1 (de) | 1999-10-06 |
DE19814218A1 (de) | 1999-10-14 |
DE59902392D1 (de) | 2002-09-26 |
ATE222612T1 (de) | 2002-09-15 |
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