FR2750909A1 - TREATMENT OF ALUMINUM ALLOY SURFACES BY PROJECTING AN ABRASIVE POWDER UNDER PRESSURE - Google Patents
TREATMENT OF ALUMINUM ALLOY SURFACES BY PROJECTING AN ABRASIVE POWDER UNDER PRESSURE Download PDFInfo
- Publication number
- FR2750909A1 FR2750909A1 FR9608901A FR9608901A FR2750909A1 FR 2750909 A1 FR2750909 A1 FR 2750909A1 FR 9608901 A FR9608901 A FR 9608901A FR 9608901 A FR9608901 A FR 9608901A FR 2750909 A1 FR2750909 A1 FR 2750909A1
- Authority
- FR
- France
- Prior art keywords
- aluminum alloy
- abrasive powder
- abrasive
- under pressure
- treatment
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Coating By Spraying Or Casting (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Traitement de surfaces en alliage d'aluminium par projection d'une poudreTreatment of aluminum alloy surfaces by spraying a powder
abrasive sous pression Domaine de l'invention L'inyention concerne un procédé de traitement de surfaces en alliage d'aluminium, telles que des tôles, des barres, des tubes, des profilés ou des pièces moulées ou usinées, par projection sous pression d'une poudre abrasive, opération désignée BACKGROUND OF THE INVENTION The invention relates to a method for treating aluminum alloy surfaces, such as sheets, bars, tubes, profiles or molded or machined parts, by pressure blasting. an abrasive powder, designated operation
habituellement sous le nom de sablage. usually under the name of sanding.
Etat de la technique Lorqu'on effectue le sablage d'une surface en alliage d'aluminium, il convient, pour obtenir une action rapide, d'utiliser un abrasif dur dont les grains présentent des arêtes vives; ainsi, le mordant du produit permet un arrachement rapide du métal Pour que l'effet soit durable, les grains d'abrasifs doivent à la fois être assez tenaces pour ne pas se briser rapidement en particules plus fines, et présenter cependant un phénomène de rupture fragile pour former de nouvelles arêtes vives et coupantes. Le matériau choisi doit donc présenter des caractéristiques mécaniques qui soient un STATE OF THE ART When sandblasting an aluminum alloy surface, to obtain a rapid action, it is necessary to use a hard abrasive whose grains have sharp edges; thus, the mordant of the product allows a fast tear of the metal So that the effect is durable, the grains of abrasives must be at the same time tenacious enough not to break quickly into finer particles, and to present a phenomenon of rupture fragile to form new sharp and sharp edges. The chosen material must therefore have mechanical characteristics which are
compromis entre dureté et tenacité, lesquelles sont en général antinomiques. compromise between hardness and toughness, which are usually antinomic.
Le matériau habituellement utilisé est le corindon blanc électrofondu broyé et tamisé. The material usually used is white ground corundum crushed and sieved.
C'est cet abrasif que recommandent les traités généraux sur l'aluminium tels que " L'Aluminium " par les Ingénieurs du Groupe Pechiney, Editions Eyrolles, Paris, 1964 (tome 2) ou " Ahluminum " de Kent Van Horn, American Society of Metals, 1967 (tome 3), ou les ouvrages sur les traitements de surface, comme par exemple " The surface treatment and finishing of aluminium and its alloys " de S. Wernick et It is this abrasive recommended by the general treaties on aluminum such as "Aluminum" by the Engineers of the Pechiney Group, Editions Eyrolles, Paris, 1964 (volume 2) or "Ahluminum" by Kent Van Horn, American Society of Metals, 1967 (volume 3), or the works on surface treatments, such as "The surface treatment and finishing of aluminum and its alloys" by S. Wernick and
R. Pinner, édité chez Robert Draper Ltd, 1964. R. Pinner, edited by Robert Draper Ltd, 1964.
Objet de l'invention L'invention a pour objet un procédé de traitement de surfaces en aluminium ou alliage d'aluminium par projection d'une poudre abrasive sous pression, dans lequel on utilise comme poudre abrasive une poudre de corindon-zircone électrofondu OBJECT OF THE INVENTION The subject of the invention is a process for treating aluminum or aluminum alloy surfaces by spraying an abrasive powder under pressure, in which an electro-fused corundum-zirconia powder is used as abrasive powder.
contenant de 20% à 45% en poids de zircone. containing from 20% to 45% by weight of zirconia.
Description de l'inventionDescription of the invention
L'invention repose sur le constat fait par la demanderesse d'une amélioration spectaculaire des résultats obtenus lors du sablage de surfaces en alliage d'aluminium en substituant au corindon blanc le corindon-zircone, en particulier en ce qui concerne The invention is based on the finding made by the Applicant of a dramatic improvement in the results obtained during the sanding of aluminum alloy surfaces by substituting white corundum corundum-zirconia, particularly with regard to
le temps de polissage et la durée d'utilisation de la poudre abrasive. the polishing time and the duration of use of the abrasive powder.
Les alliages corindon-zircone sont obtenus par fusion d'un mélange d'alumine et de zircone et sont connus comme abrasifs, mais leur utilisation comme matériau de Corundum-zirconia alloys are obtained by melting a mixture of alumina and zirconia and are known as abrasives, but their use as
sablage n'a jamais été envisagée. Sandblasting has never been considered.
L'opération de sablage se fait dans les mêmes conditions qu'avec l'utilisation d'une poudre de corindon, c'est à dire à l'aide d'air comprimé à une pression comprise entre 0,05 et 0,2 MPa pour les alliages corroyés en faible ou moyenne épaisseur et de 0,15 à 0,3 MPa pour les pièces massives, telles que les pièces de fonderie. La buse de projection est située entre 10 et 50 cm de la surface à traiter et est dirigée à peu près perpendiculairement à cette surface. Le calibre de la poudre abrasive dépend de l'état de surface recherché. Il peut aller de 20 à 60 (selon la désignation FEPA) pour un polissage grossier, de 40 à 80 pour un grain moyen, de 100 à 200 pour un grain fin et au delà de 200 pour un grain très fin. Il est possible, en particulier pour les grains fins The sanding operation is carried out under the same conditions as with the use of a corundum powder, that is to say using compressed air at a pressure of between 0.05 and 0.2 MPa for wrought alloys in low or medium thickness and from 0.15 to 0.3 MPa for massive parts, such as castings. The spray nozzle is located between 10 and 50 cm from the surface to be treated and is directed approximately perpendicular to this surface. The size of the abrasive powder depends on the desired surface condition. It can range from 20 to 60 (according to FEPA designation) for coarse polishing, from 40 to 80 for medium grain, from 100 to 200 for fine grain and beyond 200 for very fine grain. It is possible, especially for fine grains
o l'opération dégage beaucoup de poussières, de faire un sablage humide. o the operation gives off a lot of dust, to make a wet sanding.
ExemplesExamples
A partir d'une tôle en alliage d'aluminium 3003 (selon la norme NF-EN 573) d'épaisseur 4 mm, on a préparé une série de disques de diamètre 300 mmn 1) une première série de disques a été sablée au moyen de corindon blanc neuf en grains de calibre 60 selon la désignation de la FEPA (Fédération Européenne des Producteurs d'Abrasifs), sous une pression d'air comprimé de 2 bars (0,2 MPa) à 20 From a sheet of aluminum alloy 3003 (according to standard NF-EN 573) of thickness 4 mm, a series of discs with a diameter of 300 mm 1 was prepared. A first series of discs was sandblasted using of white corundum, new in 60-grain grains, according to the designation of the FEPA (European Federation of Abrasive Producers), at a compressed air pressure of 2 bar (0.2 MPa) at 20
cm du disque à polir.cm of the disc to polish.
L'état de surface désiré a été obtenu après un temps moyen de polissage de 2 mn 50 s. The desired surface condition was obtained after an average polishing time of 2 minutes 50 seconds.
Après cette première utilisation, l'abrasif qui, à l'état neuf; contenait environ 2% de grains de calibre 90, en contenait 7%. Pour réutiliser cet abrasif en vue d'obtenir le même état de surface que précédemment sur un autre disque, il faut alors un temps de polissage de 3 mn 5 s. Après cette seconde opération, le taux de grains de calibre 90 dans l'abrasif atteint 15% et, pour continuer le polissage, avec ce même abrasif à état After this first use, the abrasive which, in new condition; contained about 2% of 90-g grains, contained 7%. To reuse this abrasive in order to obtain the same surface finish as previously on another disc, then a polishing time of 3 minutes 5 seconds is required. After this second operation, the level of grains of size 90 in the abrasive reaches 15% and, to continue polishing, with this same abrasive state
de surface constant sur un autre disque, il faut alors 3 mn 25 s. constant surface on another disk, it takes 3 minutes 25 seconds.
2) La même opération de polissage sur les mêmes disques bruts que dans l'exemple précédent, a été effectuée avec un abrasif de même calibre 60 en corindon-zircone électrofondu à 25% en poids de zircone. Avec le produit neuf; le temps de polissage est de 1 mn 35 s. Après cette première utilisation, l'abrasif qui, à l'état neuf; contenait 2% de grains de calibre 90, en contient 3,5% A la seconde utilisation, le temps de polissage était de 2 mn et le taux de grains de calibre 90 était de 6%. A la troisième utilisation, l'abrasif permet encore d'obtenir le même état de surface après un temps 2) The same polishing operation on the same raw discs as in the previous example, was performed with an abrasive of the same caliber 60 fused corundum-zirconia 25% by weight of zirconia. With the new product; the polishing time is 1 mn 35 s. After this first use, the abrasive which, in new condition; It contained 2% of 90-grit grains, contained 3.5%. In the second use, the polishing time was 2 minutes and the grit rate of 90-gram was 6%. At the third use, the abrasive still makes it possible to obtain the same surface finish after a time
de polissage de 2 mnn 15 s.polishing time of 2 minutes 15 seconds.
On a mesuré les caractéristiques mécaniques des deux types de grains, à savoir: - la dureté, mesurée par indentation d'un petit diamant sous microscope optique, sur des échantillons enrobés et polis. Il existe une mesure Vickers à partir d'une empreinte pyramidale à base carrée, et une mesure KNOOP à partir d'une empreinte The mechanical characteristics of the two types of grains were measured, namely: the hardness, measured by indentation of a small diamond under optical microscope, on coated and polished samples. There is a Vickers measurement from a square-based pyramidal fingerprint, and a KNOOP measurement from a fingerprint
pyramidale à base losange, prenant mieux en compte l'anisotropie. pyramidal diamond-based, taking better account of anisotropy.
- la tenacité, c'est à dire la résistance à la fissuration, mesurée par le facteur - the tenacity, ie the resistance to cracking, measured by the factor
critique d'intensité de contrainte en déformation plane Kit, exprimé en MPa/m. critical strain intensity in plane strain Kit, expressed in MPa / m.
- la solidité, qui mesure la tenue des grains sous l'effet d'une contrainte mécanique. Le test de mesure consiste à effectuer un recalibrage des grains au calibre choisi pour la mesure, puis un broyage pendant un temps équivalent à un broyage de 15 mn d'un grain de calibre 16 de même solidité, puis un tamisage pour mesurer le refus. Les résultats de ces 4 mesures sont donnés au tableau suivant: corindon corindon-zircone dureté KNOOP (kg/mm2) 2050 1610 " " VICKERS (kg/mm2) 1940 1870 tenacité (MPa'Jm) 1,9 3,7 solidité (%) 85 93 - the solidity, which measures the behavior of the grains under the effect of a mechanical stress. The measurement test consists of recalibrating the grains to the size chosen for the measurement, then grinding for a time equivalent to grinding for 15 minutes of a 16-gauge grain of the same strength, then sieving to measure the refusal. The results of these 4 measurements are given in the following table: corundum corundum-zirconia hardness KNOOP (kg / mm2) 2050 1610 "" VICKERS (kg / mm2) 1940 1870 tenacity (MPa'Jm) 1.9 3.7 strength (% ) 85 93
Claims (1)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9608901A FR2750909B1 (en) | 1996-07-11 | 1996-07-11 | TREATMENT OF ALUMINUM ALLOY SURFACES BY SPRAYING AN ABRASIVE POWDER UNDER PRESSURE |
DK97420112T DK0818274T3 (en) | 1996-07-11 | 1997-07-09 | Surface treatment of aluminum alloy by spraying a grinding powder under pressure |
PT97420112T PT818274E (en) | 1996-07-11 | 1997-07-09 | TREATMENT OF ALUMINUM ALLOY SURFACES BY PROJECTING AN ABRASIVE POINT UNDER PRESSURE |
EP97420112A EP0818274B1 (en) | 1996-07-11 | 1997-07-09 | Surface treatment of aluminium alloys by projection of abrasive powder under pressure |
ES97420112T ES2166058T3 (en) | 1996-07-11 | 1997-07-09 | TREATMENT OF ALUMINUM ALLOY SURFACES BY PROJECTION OF A LOW PRESSURE ABRASIVE POWDER. |
AT97420112T ATE207399T1 (en) | 1996-07-11 | 1997-07-09 | SURFACE TREATMENT OF ALUMINUM ALLOYS BY BLASTING WITH GRINDING POWDER |
DE69707573T DE69707573T2 (en) | 1996-07-11 | 1997-07-09 | Surface treatment of aluminum alloys by blasting with abrasive powder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9608901A FR2750909B1 (en) | 1996-07-11 | 1996-07-11 | TREATMENT OF ALUMINUM ALLOY SURFACES BY SPRAYING AN ABRASIVE POWDER UNDER PRESSURE |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2750909A1 true FR2750909A1 (en) | 1998-01-16 |
FR2750909B1 FR2750909B1 (en) | 1998-10-16 |
Family
ID=9494115
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR9608901A Expired - Lifetime FR2750909B1 (en) | 1996-07-11 | 1996-07-11 | TREATMENT OF ALUMINUM ALLOY SURFACES BY SPRAYING AN ABRASIVE POWDER UNDER PRESSURE |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0818274B1 (en) |
AT (1) | ATE207399T1 (en) |
DE (1) | DE69707573T2 (en) |
DK (1) | DK0818274T3 (en) |
ES (1) | ES2166058T3 (en) |
FR (1) | FR2750909B1 (en) |
PT (1) | PT818274E (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004007361B4 (en) * | 2003-02-24 | 2005-10-06 | Innovent E.V. | Method for modifying galvanized steel surfaces and black steel surfaces |
CN106808372B (en) * | 2016-12-26 | 2019-04-12 | 广州市亿众金属制品有限公司 | A kind of aluminum alloy surface mechanical processing method |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2086972A5 (en) * | 1970-04-15 | 1971-12-31 | Pechiney | Abrasive grains by alpha alumina-in alumina zirconia eutectic - matrix |
US4035162A (en) * | 1973-11-09 | 1977-07-12 | Corning Glass Works | Fused abrasive grains consisting essentially of corundum, zirconia and R2 O3 |
DE3609408A1 (en) * | 1986-03-20 | 1987-09-24 | Georg Norbert Fassel | Process for regenerating wheel rims of motor vehicles |
EP0578453A1 (en) * | 1992-07-02 | 1994-01-12 | Tosoh Corporation | Zirconia based shot media |
EP0595081A1 (en) * | 1992-10-19 | 1994-05-04 | H.C. Starck GmbH & Co. KG | Zirconia-Corundum abrasive grains, process for their production, and use thereof |
DE4303339A1 (en) * | 1993-02-05 | 1994-08-11 | Ritter Aluminium Giesserei Gmb | A process for the pretreatment of aluminium castings |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2560066B1 (en) * | 1974-05-29 | 1979-12-13 | Treibacher Chemische Werke Ag | Process for the production of abrasive materials based on aluminum oxide, optionally together with other oxides |
FR2499061A1 (en) * | 1981-01-30 | 1982-08-06 | Sofrem | METHOD AND APPARATUS FOR RAPID CONTINUOUS CASTING SOLIDIFICATION AND COOLING OF MOLDED OXIDES BASED ON METAL OXIDES |
GB2137651A (en) * | 1983-04-05 | 1984-10-10 | Unicorn Ind Plc | Coated abrasives |
-
1996
- 1996-07-11 FR FR9608901A patent/FR2750909B1/en not_active Expired - Lifetime
-
1997
- 1997-07-09 ES ES97420112T patent/ES2166058T3/en not_active Expired - Lifetime
- 1997-07-09 DE DE69707573T patent/DE69707573T2/en not_active Expired - Lifetime
- 1997-07-09 AT AT97420112T patent/ATE207399T1/en active
- 1997-07-09 EP EP97420112A patent/EP0818274B1/en not_active Expired - Lifetime
- 1997-07-09 PT PT97420112T patent/PT818274E/en unknown
- 1997-07-09 DK DK97420112T patent/DK0818274T3/en active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2086972A5 (en) * | 1970-04-15 | 1971-12-31 | Pechiney | Abrasive grains by alpha alumina-in alumina zirconia eutectic - matrix |
US4035162A (en) * | 1973-11-09 | 1977-07-12 | Corning Glass Works | Fused abrasive grains consisting essentially of corundum, zirconia and R2 O3 |
DE3609408A1 (en) * | 1986-03-20 | 1987-09-24 | Georg Norbert Fassel | Process for regenerating wheel rims of motor vehicles |
EP0578453A1 (en) * | 1992-07-02 | 1994-01-12 | Tosoh Corporation | Zirconia based shot media |
EP0595081A1 (en) * | 1992-10-19 | 1994-05-04 | H.C. Starck GmbH & Co. KG | Zirconia-Corundum abrasive grains, process for their production, and use thereof |
DE4303339A1 (en) * | 1993-02-05 | 1994-08-11 | Ritter Aluminium Giesserei Gmb | A process for the pretreatment of aluminium castings |
Also Published As
Publication number | Publication date |
---|---|
EP0818274B1 (en) | 2001-10-24 |
ES2166058T3 (en) | 2002-04-01 |
DK0818274T3 (en) | 2002-02-18 |
DE69707573T2 (en) | 2002-07-11 |
FR2750909B1 (en) | 1998-10-16 |
DE69707573D1 (en) | 2001-11-29 |
PT818274E (en) | 2002-04-29 |
ATE207399T1 (en) | 2001-11-15 |
EP0818274A1 (en) | 1998-01-14 |
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