EP3122912A2 - Produit filé en alliage 6xxx apte au décolletage et présentant une faible rugosité après anodisation - Google Patents
Produit filé en alliage 6xxx apte au décolletage et présentant une faible rugosité après anodisationInfo
- Publication number
- EP3122912A2 EP3122912A2 EP15711658.3A EP15711658A EP3122912A2 EP 3122912 A2 EP3122912 A2 EP 3122912A2 EP 15711658 A EP15711658 A EP 15711658A EP 3122912 A2 EP3122912 A2 EP 3122912A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- spun product
- spun
- less
- mechanical part
- weight
- 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
- 238000007743 anodising Methods 0.000 title claims description 14
- 235000012438 extruded product Nutrition 0.000 title abstract 3
- 229910045601 alloy Inorganic materials 0.000 title description 57
- 239000000956 alloy Substances 0.000 title description 57
- 238000005520 cutting process Methods 0.000 title description 10
- 239000000203 mixture Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 10
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000009987 spinning Methods 0.000 claims description 26
- 230000007797 corrosion Effects 0.000 claims description 16
- 238000005260 corrosion Methods 0.000 claims description 16
- 238000002048 anodisation reaction Methods 0.000 claims description 15
- 238000003754 machining Methods 0.000 claims description 15
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 12
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 239000010949 copper Substances 0.000 claims description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 235000006408 oxalic acid Nutrition 0.000 claims description 4
- 229920005862 polyol Polymers 0.000 claims description 4
- 150000003077 polyols Chemical class 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims 1
- AIXMJTYHQHQJLU-UHFFFAOYSA-N chembl210858 Chemical compound O1C(CC(=O)OC)CC(C=2C=CC(O)=CC=2)=N1 AIXMJTYHQHQJLU-UHFFFAOYSA-N 0.000 claims 1
- 238000005496 tempering Methods 0.000 claims 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 239000011651 chromium Substances 0.000 description 10
- 239000011572 manganese Substances 0.000 description 10
- 239000011777 magnesium Substances 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- 229910000967 As alloy Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000010036 direct spinning Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000005070 ripening Effects 0.000 description 1
- 238000004439 roughness measurement Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/08—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing inorganic acids
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/06—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used
- C25D11/10—Anodisation of aluminium or alloys based thereon characterised by the electrolytes used containing organic acids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/14—Making other products
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/16—Pretreatment, e.g. desmutting
Definitions
- the invention relates to turned parts obtained from rod or rod type spun products, made of aluminum alloy of the AA6xxx series, and in particular parts which have undergone post-machining surface treatment.
- Bar turning refers to a field of manufacture by machining, in large series, mechanical parts typically of revolution (screw, bolt, shaft, piston, etc.) by removal of material from bars or rods of metal.
- the parts are produced at high speeds on manual or digital cutting machines.
- the productivity and the surface condition as well as the dimensional accuracy of the final part are the main objectives attached to this type of manufacturing.
- the parts may undergo a protective surface treatment, typically by anodizing.
- the so-called hard anodization typically carried out at low temperature (0-5 ° C), high current density in the presence of sulfuric acid makes it possible to obtain particularly resistant coatings.
- the pieces thus produced find their application in various fields, from watchmaking to medical equipment, through the fields of transport (aeronautics, railway, automobile) and industrial (electrical, electronic, hydraulic ).
- the international application WO2005 / 100623 discloses alloys, preferably in spun form, suitable for free cutting and composition in weight% Si 0.6 - 2.0; Fe 0.2 - 1.0; Mg 0.5 - 2.0, Cu max 1.0, Mn max 1.5, Zn max 1.0, Cr max 0.35, Ti max 0.35 and Zr 0.04 - 0.3.
- the problem that the present invention seeks to solve is to obtain spun products which are simultaneously capable of free cutting and resistant to intergranular corrosion and which after machining and anodizing a low roughness.
- a first object of the invention is a spun product suitable for cutting aluminum alloy composition, in% by weight, Si 0.4 - 0.8; Mg 0.8 - 1.2; Cu 0.20 - 0.4; Fe 0.05 - 0.4; Mn ⁇ 0.10; Ti ⁇ 0.15; Cr ⁇ 0.10; Bi ⁇ 0.8; Pb ⁇ 0.4; other elements ⁇ 0.05 each and ⁇ 0.15 remains aluminum, characterized in that its granular structure is essentially recrystallized.
- a second object of the invention is the use of a spun product according to the invention for the manufacture of a brake piston or a gearbox element.
- Another subject of the invention is a process for producing a spun product according to the invention in which, successively,
- an aluminum alloy of composition according to the invention is produced, and is typically cast in the form of a billet
- said billet is homogenized at a temperature of at least 550 ° C
- said billet is homogenized to obtain a spun product, the initial spinning temperature being less than 550 ° C,
- said spun product is brought into solution and is preferably quenched with water, said dissolution being able to be carried out either by virtue of the heat generated during the spinning or by a separate heat treatment,
- an income is produced at a temperature between 150 and 200 ° C for a period of between 5 and 25 hours
- said spun product is typically cold deformed by drawing.
- Yet another object of the invention is a method of manufacturing a mechanized and anodized mechanical part in which successively
- the spun product is machined to obtain a low-cut mechanical part
- the mechanical part thus obtained is shaped
- Yet another object of the invention is a mechanized and anodized mechanical part obtained by the method of manufacturing a mechanical part according to the invention.
- Figure 1 Observation of the samples after the standardized corrosion test according to EN ISO 1846: 2008 (method B).
- the static mechanical characteristics in other words the ultimate tensile strength Rm, the conventional yield stress at 0.2% elongation Rp0.2 and the elongation at break A%, are determined by a tensile test according to ISO 6892-1, the sampling and the direction of the test being defined by EN 485-1.
- the bar turning ability is evaluated by a machining test as described in international application WO2013 / 170953 in paragraph [0039].
- the test consists in determining the fragmentation ability of the chips by measuring the number of chips in a determined mass of chips collected, here 100g. Machining is carried out using a SP 12 CNC lathe and a rhombic insert with a basic 80 ° shape sold under the registered trademark S AND VIK Coromant Coroturn® 107 with the reference CCGX 09 T3 04-AL, designed for alloys with 'aluminum.
- the machining parameters used are a rotation speed of 3000 rpm, a feed of 0.3 mm / revolution and a cutting depth of 3.5 mm.
- the products spun according to the invention are suitable for bar turning, that is to say that they present the test described in international application WO2013 / 170953 in paragraph [0039] a number of chips per 100g of chips of at least 3000 and preferably at least 4000.
- the corrosion resistance was evaluated according to the standardized test EN ISO 1846: 2008 (method B).
- the surface of the samples was 20 cm 2 .
- the samples were prepared by degreasing with an organic solvent, immersion for 2 minutes in 5% sodium hydroxide at a temperature of 55 ° C., rinsing and immersion for 2 minutes in 2% nitric acid.
- Rmax maximum height of the roughness profile, which is the largest of the R Z i values over the evaluation length
- R z Average profile height R 2 , which is the arithmetic mean of the individual values R Z i over the evaluation length
- ⁇ Ra Average roughness difference is the arithmetic mean of all the ordinates of the profile over the evaluation length.
- a substantially recrystallized granular structure is called a granular structure such that the degree of recrystallization at a thickness is greater than 70% and preferably greater than 90%.
- the recrystallization rate is defined as the surface fraction on a metallographic section occupied by recrystallized grains.
- the present inventors have found that for known free-cutting alloys, such as the alloys AA6262, AA6064A or AA6042 or the alloy described in the international application WO2013 / 170953, the roughness after anodization to obtain a layer of oxide of thickness of at least 20 ⁇ and much greater than the roughness before anodization.
- the roughness after anodization is at least 1.80 ⁇ or more.
- the present inventors have found that this problem is solved by controlling the composition of the alloy according to the invention and its granular structure.
- the spun products suitable for free cutting according to the invention are aluminum alloy composition, in% by weight, Si 0.4 - 0.8; Mg 0.8 - 1.2; Cu 0.20 - 0.4; Fe 0.05 - 0.4; Mn ⁇ 0.10; Ti ⁇ 0.15; Cr ⁇ 0.10; Bi ⁇ 0.8; Pb ⁇ 0.4; other elements ⁇ 0.05 each and ⁇ 0, 15 remains aluminum.
- the copper content in this first embodiment is at least 0.23% by weight.
- the copper content is at least 0.30% by weight.
- the iron content is preferably at least 0.20% by weight and preferably 0.25% by weight.
- the composition is such that, in% by weight, Bi: 0.4 - 0.8 and Pb 0.2 - 0.4 and preferably Pb 0.2 - 0.34.
- the silicon content is between 0.5 and 0.7% by weight and / or the magnesium content is between 0.9 and 1.1% by weight.
- the essentially recrystallized granular structure is obtained in particular by controlling the manganese content and the chromium content.
- the manganese content is at most 0.05% by weight.
- the chromium content is at most 0.08% by weight.
- the sum of the chromium and manganese content is such that, in% by weight, Cr + Mn ⁇ 0, 15 and preferably Cr + Mn ⁇ 0, 10.
- the control of the zirconium content can also be important for obtaining the essentially recrystallized granular structure.
- the zirconium content is less than 0.04% by weight and preferably less than 0.03% by weight.
- the alloy and the metallurgical structure of the spun products according to the invention are also advantageous because their spinnability is excellent, in particular the pressure necessary to initiate the spinning is lower, the spinning speed is higher than for known alloys and no spinning defects such as hot tearing are observed.
- the spun products according to the invention have satisfactory static mechanical strength properties: their yield strength is preferably in the T6 state of at least 300 MPa and their elongation being at least 10% and their elastic limit being preferably in the T9 state of at least 330 MPa and their elongation being at least 8%.
- the present inventors have found that a substantially recrystallized spun product of the invention has improved intergranular corrosion resistance.
- the spun products according to the invention have a resistance to intergranular corrosion according to the ISO 11846 method B test such that the maximum depth of corrosion on a cross section of the spun product is less than 200 ⁇ and that the relative area of the attack is less than 50%.
- a spun product essentially recrystallized from an alloy according to the invention has improved roughness after machining and anodizing.
- a solution comprising 180 g / l of sulfuric acid and 14 g / l of oxalic acid and 15 g / l of glycerol to obtain an oxide layer.
- Thickness 30 ⁇ the product spun according to the invention has a roughness Rz on a generatrix parallel to the spinning axis less than or equal to 1.7 ⁇ and preferably less than 1, 2 ⁇ .
- the spun products according to the invention are also advantageous in that for a so-called "hard” anodization, the anodizing time is reduced, which is favorable for productivity.
- a spun product according to the invention is characterized in that the anodizing time to obtain an anode layer of thickness 30 ⁇ in a 200 g / l H 2 SO 4 solution at 5 ° C. is less than 30 minutes for a current density. of 3 A / dm 2 or in other words the oxide growth rate is greater than 1 ⁇ / min.
- the subject of the invention is also the process for producing the spun products according to the invention.
- an aluminum alloy of composition according to the invention is produced and is typically cast in the form of a billet.
- the billet is then homogenized at a temperature of at least 550 ° C and preferably at least 580 ° C.
- the chosen homogenization temperature contributes in particular to obtaining a substantially recrystallized granular structure.
- the billet thus homogenized is then spun, the initial spinning temperature being less than 550 ° C and preferably less than 540 ° C.
- An initial spinning temperature of at least 450 ° C is preferred.
- the resultant spun product is dissolved and the water product obtained is preferably quenched with water, the solution being able to be carried out by means of the heat generated during the spinning or in a separate heat treatment.
- the quenching carried out at the die outlet on spinning heat, typically with water is advantageous.
- colder and / or cold deformation is typically carried out by pulling and / or drawing, and / or ripening the spun product.
- the cold deformation is sufficient, typically at least 7%, to influence the mechanical properties after income.
- the eventual maturation is typically from a few hours to a few days.
- the spun product is then returned to a temperature between 150 and 200 ° C for a period of between 5 and 25 hours to obtain a T6 or T8 state.
- the subject of the invention is also a process for manufacturing a mechanized and anodized mechanical part in which, successively,
- the spun product is machined to obtain a low-cut mechanical part, c. optionally, the mechanical part thus obtained is shaped
- the mechanical part thus obtained is anodized, the oxide thickness being at least 20 ⁇
- the anodization is carried out at a temperature between 0 and 10 ° C. with a solution containing 100 to 250 g / l of sulfuric acid with a current density of 1 to 3 A / dm 2 with a oxide growth greater than 1 ⁇ / min.
- the spun products according to the invention make it possible in these conditions to reduce the anodizing time compared to products according to the prior art.
- the anodization is carried out at a temperature of between 15 and 40 ° C. with a solution comprising 100 to 250 g / l of sulfuric acid and 10 to 30 g / l of oxalic acid and 5 to 30 g / l of at least one polyol.
- at least one polyol is chosen from ethylene glycol, propylene glycol or glycerol.
- the anodization is carried out with a current density of between 1 and 5 A / dm 2 and preferably of 2 and 4 A / dm 2 .
- the anodic layer thickness obtained is between 15 and 40 ⁇ .
- the invention also relates to mechanical parts cut and anodized obtained by the method according to the invention. These mechanical parts are advantageous because simultaneously they have a roughness Rz on a generatrix parallel to the spinning axis less than or equal to 2.3 ⁇ and preferably less than or equal to 1, 7 ⁇ and their resistance to intergranular corrosion according to the ISO 11846 method B test is such that the maximum depth of corrosion on a cross section of the spun product is less than 200 ⁇ and that the relative area of the attack is less than 50%.
- the alloys were cast in the form of 254 mm diameter billets, homogenized at 585 ° C. and then spun in the form of 15 ⁇ 100 mm cross-section bars, by direct spinning, the initial spinning temperature being 530 ° C.
- the pressure necessary to initiate the spinning was 140 bar for the alloy A according to the invention, significantly lower than the pressure necessary to initiate the spinning of the alloy B which was 160 bar.
- the spinning speed was 8.3 m / min for alloy billet A whereas it was 7.2 m / min for alloy B. Pull-out during spinning was observed for alloy B then that these cracks were not observed for the alloy A.
- the alloy A thus had a better flowability than the alloy B.
- the spun products were dipped at the outlet of the press.
- the bars thus obtained were split by 1% and then had an income to obtain a T6 state.
- the alloy bar A thus obtained had a granular structure recrystallized 1 ⁇ 4 thickness while the alloy bar B had a granular structure not recrystallized 1 ⁇ 4 thickness.
- the mechanical properties of the bars thus obtained, measured in the direction of the spinning are presented in Table 2.
- the bars obtained were suitable for bar turning.
- the alloys were cast in the form of billets 254 mm in diameter, homogenized at 585 ° C. and then spun in the form of cylindrical bars and quenched at the outlet of the press. The bars thus obtained were fractionated by 1% and then were tempered and stretched to obtain 14 mm diameter bars.
- the alloy bar A thus obtained had a granular structure recrystallized 1 ⁇ 4 thickness while the alloy bar B had a granular structure not recrystallized 1 ⁇ 4 thickness.
- the bars obtained were suitable for bar turning.
- the alloys were cast in the form of billets, homogenized and then spun in the form of 30 mm diameter bars.
- the spun products were dipped at the outlet of the press.
- the bars thus obtained were fractionated by 1% and then had an income to obtain bars in T6 state.
- the spun products were dipped at the outlet of the press.
- the bars thus obtained were fractionated by 1%, then underwent an income followed by a cold deformation to obtain a product in the T9 state.
- the alloy F was stretched so as to obtain a bar of diameter 24.5 mm and the alloy G a bar of diameter 26 mm.
- the alloy bars F and G thus obtained have a granular structure recrystallized 1 ⁇ 4 thickness.
- the alloy was cast in the form of billets 261 mm in diameter, homogenized and then spun in the form of bars.
- a bar was dipped at the outlet of the press, pulled by 1% and then deformed cold to obtain a final diameter of 24.6 mm and then suffered an income to obtain a product in the T8 state.
- Another bar was quenched at the press outlet, cold-chilled by about 1%, then was tempered followed by cold deformation to obtain a final diameter of 24.5 mm to obtain a product in the T9 state.
- the alloy bars H thus obtained have a granular structure recrystallized to 1 ⁇ 4 thickness.
- the bar turning ability was evaluated by a machining test as described in the international application WO2013 / 170953 in paragraph [0039].
- the test consists in determining the fragmentation ability of the chips by measuring the number of chips in a determined mass of chips collected, here 100g. The weight of 50 chips also determined. The results are shown in Table 11.
- Machining is carried out using a SP 12 CNC lathe and a rhombic insert with a basic 80 ° shape sold under the registered trademark SANDVI Coromant Coroturn® 107 with the reference CCGX 09 T3 04-AL, designed for aluminum alloys .
- the machining parameters used are a rotation speed of 3000 rpm, a feed of 0.3 mm / revolution and a cutting depth of 3.5 mm.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Extrusion Of Metal (AREA)
- Metal Extraction Processes (AREA)
- Braking Arrangements (AREA)
- Forging (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1400703A FR3018823B1 (fr) | 2014-03-24 | 2014-03-24 | Produit file en alliage 6xxx apte au decolletage et presentant une faible rugosite apres anodisation |
PCT/EP2015/000614 WO2015144303A2 (fr) | 2014-03-24 | 2015-03-20 | Produit filé en alliage 6xxx apte au décolletage et présentant une faible rugosité après anodisation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3122912A2 true EP3122912A2 (fr) | 2017-02-01 |
EP3122912B1 EP3122912B1 (fr) | 2024-05-15 |
Family
ID=50933252
Family Applications (1)
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EP15711658.3A Active EP3122912B1 (fr) | 2014-03-24 | 2015-03-20 | Produit filé en alliage 6xxx apte au décolletage et présentant une faible rugosité après anodisation |
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US (1) | US10724123B2 (fr) |
EP (1) | EP3122912B1 (fr) |
CN (1) | CN106133163B (fr) |
CA (1) | CA2942426A1 (fr) |
FR (1) | FR3018823B1 (fr) |
WO (1) | WO2015144303A2 (fr) |
Families Citing this family (6)
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FR3018824B1 (fr) * | 2014-03-24 | 2017-07-28 | Constellium Extrusion Decin S R O | Procede de fabrication d'une piece mecanique decolletee et anodisee en alliage 6xxx presentant une faible rugosite apres anodisation |
CA3032261A1 (fr) | 2016-08-26 | 2018-03-01 | Shape Corp. | Procede de formage a chaud et appareil de pliage transversal d'une poutre d'aluminium profilee pour former a chaud un composant structural de vehicule |
EP3529394A4 (fr) | 2016-10-24 | 2020-06-24 | Shape Corp. | Procédé de formage et de traitement thermique d'un alliage d'aluminium en plusieurs étapes pour la production de composants pour véhicules |
CN106636800A (zh) * | 2016-12-05 | 2017-05-10 | 东莞市欧比迪精密五金有限公司 | 一种镁铝合金材料及其加工工艺 |
IT201800006938A1 (it) * | 2018-07-05 | 2020-01-05 | Procedimento continuo di produzione di capillari in leghe non-ferrose. | |
CN113025973A (zh) * | 2021-03-03 | 2021-06-25 | 浙江最成半导体科技有限公司 | 一种Al-Cu溅射靶材及其制备方法 |
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US3524799A (en) * | 1969-06-13 | 1970-08-18 | Reynolds Metals Co | Anodizing aluminum |
US4659396A (en) | 1984-07-30 | 1987-04-21 | Aluminum Company Of America | Metal working method |
US5342459A (en) * | 1993-03-18 | 1994-08-30 | Aluminum Company Of America | Aluminum alloy extruded and cold worked products having fine grain structure and their manufacture |
JP3832774B2 (ja) | 1995-07-10 | 2006-10-11 | 住友軽金属工業株式会社 | 冷間鍛造性に優れた切削用アルミニウム合金および切削用アルミニウム合金冷間鍛造材の製造方法 |
US5776269A (en) | 1995-08-24 | 1998-07-07 | Kaiser Aluminum & Chemical Corporation | Lead-free 6000 series aluminum alloy |
US5807612A (en) * | 1996-08-06 | 1998-09-15 | The University Of Connecticut | Method for coating metals by dip autopolymerization |
JPH10265884A (ja) * | 1997-03-26 | 1998-10-06 | Nippon Light Metal Co Ltd | 被削性に優れたアルミニウム合金材及びその製造方法 |
US6248189B1 (en) * | 1998-12-09 | 2001-06-19 | Kaiser Aluminum & Chemical Corporation | Aluminum alloy useful for driveshaft assemblies and method of manufacturing extruded tube of such alloy |
JP2003119537A (ja) * | 2001-10-11 | 2003-04-23 | Furukawa Electric Co Ltd:The | 切削性に優れたアルミニウム合金 |
CN1176237C (zh) * | 2002-03-01 | 2004-11-17 | 清华大学 | 一种高镁低硅富含锰铬的耐蚀铝合金 |
JP2004292847A (ja) | 2003-03-25 | 2004-10-21 | Showa Denko Kk | 切削加工用アルミニウム合金押出材、アルミニウム合金製切削加工品及び自動車部品用バルブ材 |
JP2005272853A (ja) * | 2004-03-22 | 2005-10-06 | Nsk Ltd | 酸化物被膜を有する機械部品及び該機械部品を備える転動装置、並びに該機械部品の表面処理方法 |
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JP5160930B2 (ja) | 2008-03-25 | 2013-03-13 | 株式会社神戸製鋼所 | 曲げ圧壊性と耐食性に優れたアルミニウム合金押出材およびその製造方法 |
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JP2009013503A (ja) | 2008-09-29 | 2009-01-22 | Showa Denko Kk | 切削加工用アルミニウム合金押出材、アルミニウム合金製切削加工品及び自動車部品用バルブ材 |
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2014
- 2014-03-24 FR FR1400703A patent/FR3018823B1/fr active Active
-
2015
- 2015-03-20 US US15/127,414 patent/US10724123B2/en active Active
- 2015-03-20 CN CN201580016463.XA patent/CN106133163B/zh active Active
- 2015-03-20 CA CA2942426A patent/CA2942426A1/fr not_active Abandoned
- 2015-03-20 EP EP15711658.3A patent/EP3122912B1/fr active Active
- 2015-03-20 WO PCT/EP2015/000614 patent/WO2015144303A2/fr active Application Filing
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ASM HANDBOOK COMMITTEE: "Heat Treating of Aluminum Alloys Precipitation from Solid Solution", 1 January 1991 (1991-01-01), pages 841 - 879, XP055446965, Retrieved from the Internet <URL:https://www.google.nl/url?sa=t&rct=j&q=&esrc=s&source=web&cd=13&ved=0ahUKEwjisLX97ITZAhVDIVAKHeMxCyUQFghjMAw&url=https://materialsdata.nist.gov/bitstream/handle/11115/192/Heat%20Treating%20of%20Aluminum%20Alloys.pdf?sequence=3&isAllowed=y&usg=AOvVaw0R-bEoKiihR4bGLsSlPhZ6> [retrieved on 20180201], DOI: 10.1361/asmhba0001205 * |
RINDERER BARBARA ED - PRASAD A ET AL: "The Metallurgy of Homogenisation", vol. 693, 1 January 2011 (2011-01-01), pages 264 - 275, XP009519269, ISBN: 978-3-03785-209-5, Retrieved from the Internet <URL:https://doi.org/10.4028/www.scientific.net/MSF.693?nosfx=y> [retrieved on 20110701], DOI: 10.4028/WWW.SCIENTIFIC.NET/MSF.693.264 * |
Also Published As
Publication number | Publication date |
---|---|
FR3018823B1 (fr) | 2018-01-05 |
WO2015144303A2 (fr) | 2015-10-01 |
CN106133163A (zh) | 2016-11-16 |
CN106133163B (zh) | 2019-07-23 |
US10724123B2 (en) | 2020-07-28 |
WO2015144303A3 (fr) | 2016-06-02 |
EP3122912B1 (fr) | 2024-05-15 |
US20180202026A1 (en) | 2018-07-19 |
FR3018823A1 (fr) | 2015-09-25 |
CA2942426A1 (fr) | 2015-10-01 |
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