EP2329053A1 - Casting made from aluminium alloy, having high hot creep and fatigue resistance - Google Patents
Casting made from aluminium alloy, having high hot creep and fatigue resistanceInfo
- Publication number
- EP2329053A1 EP2329053A1 EP09802550A EP09802550A EP2329053A1 EP 2329053 A1 EP2329053 A1 EP 2329053A1 EP 09802550 A EP09802550 A EP 09802550A EP 09802550 A EP09802550 A EP 09802550A EP 2329053 A1 EP2329053 A1 EP 2329053A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- molded part
- part according
- content
- magnesium
- alloys
- 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
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 10
- 238000005266 casting Methods 0.000 title abstract description 12
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 36
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 25
- 229910052802 copper Inorganic materials 0.000 claims abstract description 22
- 229910052742 iron Inorganic materials 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 230000003068 static effect Effects 0.000 claims abstract description 7
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 7
- 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
- 238000002485 combustion reaction Methods 0.000 claims abstract description 6
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 6
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 3
- 239000011777 magnesium Substances 0.000 claims description 41
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 33
- 239000010949 copper Substances 0.000 claims description 26
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000004090 dissolution Methods 0.000 claims description 9
- 230000005496 eutectics Effects 0.000 claims description 9
- 239000011701 zinc Substances 0.000 claims description 8
- 239000011572 manganese Substances 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 4
- 238000007670 refining Methods 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- 239000003607 modifier Substances 0.000 claims 1
- 239000004411 aluminium Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 description 53
- 239000000956 alloy Substances 0.000 description 53
- 238000007792 addition Methods 0.000 description 18
- 238000012360 testing method Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 8
- 238000011282 treatment Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- UDHXJZHVNHGCEC-UHFFFAOYSA-N Chlorophacinone Chemical compound C1=CC(Cl)=CC=C1C(C=1C=CC=CC=1)C(=O)C1C(=O)C2=CC=CC=C2C1=O UDHXJZHVNHGCEC-UHFFFAOYSA-N 0.000 description 5
- 125000003367 polycyclic group Chemical group 0.000 description 5
- 238000010791 quenching Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000006399 behavior Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000005496 tempering Methods 0.000 description 3
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000009021 linear effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000789 Aluminium-silicon alloy Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910000979 O alloy Inorganic materials 0.000 description 1
- 229910000796 S alloy Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000031877 prophase Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000012552 review Methods 0.000 description 1
- 238000010112 shell-mould casting Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000005382 thermal cycling Methods 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 230000003313 weakening effect Effects 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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- 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
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
- C22C21/04—Modified aluminium-silicon alloys
-
- 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
-
- 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
- C22F1/043—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 silicon as the next major constituent
-
- 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
- C22F1/057—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 copper as the next major constituent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/90—Alloys not otherwise provided for
- F05C2201/906—Phosphor-bronze alloy
Definitions
- the invention relates to molded aluminum alloy parts subjected to high mechanical stresses and working, at least in some of their areas, at high temperatures, including cylinder heads supercharged diesel or gasoline engines.
- alloys commonly used for the cylinder heads of automotive mass-produced vehicles are on the one hand alloys of the AlSi7Mg and AlSiIOMg type, optionally “doped” by an addition of 0.50% to 1% of copper, and on the other hand alloys of the AlS i5 family at 9Cu3Mg.
- the alloys of the first type, AlSi7 (Cu) Mg and AlSiIO (Cu) Mg treated T5 (simple stabilization) and T7 (complete solution treatment, quenching and over-tempering) have sufficient mechanical properties up to about 250 0 C, but not at 300 0 C, which will nevertheless be reached by the inter-valve bridges of the new generations of supercharged common-rail diesel engines, or even new gasoline engines with double turbocharging. At 300 ° C., their yield strength and their creep resistance are particularly low. On the other hand, thanks to good ductility throughout the temperature range from ambient to 250 ° C., they have satisfactory resistance to thermal fatigue cracking.
- the alloys of the type AlSi5 to 9Cu3Mg0.25 to 0.5 which have a better resistance to heat, have on the other hand a rather low ductility which makes them very vulnerable to thermal fatigue cracking.
- AlSi7MgO.3 alloy with addition of 0.50% copper and T7 state, solution now widely used industrially, allows a very significant gain (+ 20%) yield strength at 250 ° C, without loss of elongation. But the gain provided by this limited addition of copper is totally lost at 300 ° C.
- the Wohler curves of FIGS. 1, 2 and 3 represent the breaking stress (successively with a breaking probability of 5% in bright lines on the left, 50% in dark lines in the middle and 95% in bright lines on the right) depending number of cycles.
- the subject of the invention is therefore a molded part with high mechanical strength and hot creep, in particular to 300 ° C. or more, combined with a yield strength at high ambient temperature and a high resistance to mechanical fatigue as well.
- Cu 2.0 - 5.0%, preferably 2.5 - 4.2%, more preferably 3.0 - 4.0%
- Mn 0.05 - 0.50%, preferably 0.08 - 0.20%
- Mg 0.10 - 0.45%, preferably 0.10 - 0.25%, and better 0.10 - 0.20%
- Ni ⁇ 0.30%, preferably ⁇ 0.10%
- V 0.05 - 0.30%, preferably 0.08 - 0.20%, more preferably 0.10 - 0.19%
- Ti 0.01 - 0.25%, preferably 0.05 - 0.20% optionally one or more modifying element (s) of the eutectic chosen from Sr (30 - 500 ppm), Na (20 - 100 ppm) and Ca (30 - 120 ppm), or refining eutectic, Sb (0.05 - 0.25%), other elements ⁇ 0.05% each and 0.15% in total, remains aluminum.
- modifying element (s) of the eutectic chosen from Sr (30 - 500 ppm), Na (20 - 100 ppm) and Ca (30 - 120 ppm), or refining eutectic, Sb (0.05 - 0.25%), other elements ⁇ 0.05% each and 0.15% in total, remains aluminum.
- Figure 1 represents the Wohler curves, ie the breaking stress (successively with a 5% probability of breaking in bright lines on the left, 50% in dark lines in the middle and 95% in bright lines on the right) as a function of the number of cycles for AlSi7Cu0.5Mg0.3 alloy.
- Figure 2 shows the same curves for alloys
- FIG. 3 shows the same curves for magnesium-free AlS i7Cu3.5Mn VZrTi alloys containing 3.8% copper.
- FIG. 4 represents an extract from the European standard NFE66-520-8 allowing the notation of chip fragmentation during the drilling test implemented in the chapter "Examples” to characterize the machinability.
- the notations used in the present cases are 1.1: "elementary-fragmented whistle", 6.2: “short-helical” and 6.3: “mid-long helical”.
- the invention is based on the finding by the applicant that it is possible to make significant improvements to the characteristics mentioned above of AlSi7Cu3.5MnVZrTi alloy according to patents FR 2 857 378 and EP 1 651 787 of the applicant, and thus solve the objective problem in two complementary ways: the addition of a small amount of magnesium and a combined addition of vanadium.
- Table 2 indicates, depending on the amount of magnesium added, the amounts of hardening phase A12Cu and Q-A15Mg8Si6Cu2 formed in AlS base i7Cu3.5Mn VZrTi, at equilibrium at 200 ° C, after a solution solution followed of a temper.
- the values (in this case, in atomic%) are calculated using the "Prophase" thermodynamic simulation software developed by the Applicant.
- the gain on the elastic limit at 20 ° C. is substantially 100 MPa (from 200 to approximately 300 MPa) with addition of only 0.10%.
- the effect of magnesium is absolutely not linear in the range 0 to 0.20%: it is indeed negligible between 0 and 0.05%, intense between 0.05 and 0.10% and a plateau is then observed to a level of substantially 0.20%.
- magnesium no longer has a significant effect on the endurance limit, of the order of 130 MPa to 10 7 cycles, still according to Figure 6.
- the alloys of Al type Al Si5Cu3 and AlSi7Cu3 according to the invention do not exhibit the final quaternary eutectic Al-Si-A12Cu-A15Mg8Si6Cu2, melting at 507 ° C. according to the HWL Philips phase diagrams (Equilibrium Diagrams of Aluminum Alloy Systems, The Aluminum Development Association, Information Bulletin 25. London.1961) or at 508 0 C according to other authors. Indeed, their melting start temperature, determined by differential enthalpy analysis (AED) is substantially at 513 ° C, as shown in Figure 9. This allows to apply a dissolution at 505 0 C, typically between 500 and 513 ° C, without risk of burns, with standard heat treatment equipment, while alloys of the prior art are treated at 500 0 C at most, and 495 ° C in general.
- AED differential enthalpy analysis
- a second component of the present invention lies in the combination of a vanadium addition to the above-mentioned addition of magnesium: Surprisingly, the Applicant has observed the existence of a strong interaction between magnesium and vanadium on the elastic limit and more on the creep resistance at 300 ° C.
- magnesium a high diffusion coefficient eutectic element, participates in the structural hardening after tempering, by formation of intermetallic phases coherent with the aluminum matrix, in this case via the Q phase mentioned above, but progressively loses its hardening effect by coalescing said phase at 300 ° C and higher.
- vanadium a peritectic element with a very low diffusion coefficient
- vanadium a peritectic element with a very low diffusion coefficient
- solid solution enriched at the core of the dendrites and may precipitate in the form of only semi-coherent Al-V-Si dispersoids. which remain stable at high temperatures above 400 ° C.
- Vanadium addition greater than 0.21% is possible and is just as beneficial for creep resistance, but the solubility of vanadium in the liquid alloy is limited.
- the bath in order to maintain a 0.25% vanadium solution, the bath must be kept at a temperature of at least 745 ° C, a relatively high value for the casting of "shell" yokes (metal mold permanent) by gravity or low pressure. Levels of 0.21%, and even better 0.17%, allow a hold at 730 or
- Silicon it is essential to obtain good foundry properties, such as flowability, absence of creasability, good supply of shrinkage. For a content of less than 3%, these properties are insufficient for shell molding whereas for contents above 11% the shrinkage is too concentrated and elongation too low. In addition, a compromise generally considered as optimum between these properties and the ductility is between 5 and 9%. This range corresponds to most engine-type, internal combustion engine applications.
- thermomechanical stress experienced by each particular model of part one can choose a level of tolerance adapted iron, knowing that the "high purity", especially with regard to iron, is a cost factor.
- a level of tolerance adapted iron knowing that the "high purity", especially with regard to iron, is a cost factor.
- the copper content of such hot-resistant alloys is typically in the range of 2 to 5%. Preferentially, the range between 2.5%, to ensure a sufficiently high yield strength and heat resistance, and 4.2%, approximate solubility limit of copper in a base containing from 4.5 to 10% of silicon and up to 0.25% magnesium with dissolution at a temperature of 513 ° C or lower.
- the examples described below show that the increase of the copper content from 3.5 to 4.0% results in a gain of the order of 30 MPa on the yield strength and 15 MPa on ultimate strength, but also 1% loss on the elongation as shown by the comparison of Figures 4 and 5. Given these results and the need in the case of the cylinder heads much sought to have a good compromise between strength and ductility, the field best Suitable for copper seems to be 3 to 4%.
- Manganese the Applicant has already identified in previous research described in the aforementioned article, published in "Men and Foundry” of February 2008, a manganese content of 0.08 to 0.20% improved the effect of zirconium on the resistance to creep at 300 ° C.
- Zinc If one chooses to use the variant with a high iron content, up to 0.50%, it is necessary, in order to profit economically, to also tolerate a level of zinc content up to 0.30%. In the preferred case where a high purity iron alloy of primary origin is used, the zinc content may advantageously be limited to 0.10%.
- Nickel like zinc, this element, which significantly reduces the elongation, can be tolerated at a content of up to 0.30% in an alloy with an iron content of up to 0.50%, but it will preferably be limited to 0.10% when a high ductility is sought.
- Zirconium the Applicant has already identified, in previous research, the positive effect of zirconium on the resistance to hot creep through the formation of stable dispersoidal phases of the AlSiZrTi type. This effect is underlined, in particular, in patents FR 2 841 164 and FR 2 857 378 of the applicant claiming a range of 0.05 to 0.25% and in the second, preferably 0.12 to 0.20%. A content of 0.08 to 0.20% is a balanced compromise knowing that too high levels, of the order of 0.25%, lead to coarse and embrittling primary phases, and that too low levels are found to be insufficient in terms of resistance to creep.
- Titanium acts in two joint modes: on the one hand, it promotes the refining of the primary aluminum grain, on the other hand, it contributes to creep resistance, as identified in patent FR 2 841 164, by participating in the formation of AlSiZrTi dispersoid phases. These two objectives are simultaneously achieved for contents between 0.01 and 0.25%, and preferably between 0.05 and 0.20%.
- Modification of the eutectic is generally desirable in order to improve the elongation of the Al-Si alloys. This modification is achieved by the addition of one or more strontium (from 30 to 500 ppm), sodium (from 20 to 100 ppm) or calcium (from 30 to 120 ppm) elements.
- Another way to refine the eutectic AlSi is to add antimony (from 0.05 to
- Heat treatment the molded parts according to the invention are generally subjected to a heat treatment including dissolution, quenching and tempering.
- a heat treatment including dissolution, quenching and tempering.
- T7 a type of treatment T7, with over-income which has the advantage of stabilizing the room.
- the cast test pieces have undergone, for a part of them, a hot isostatic compaction treatment, or "hot isostatic pressing" (known to those skilled in the art under the name “HIP”), from 2h to 485 ° C (+/- 10 ° C) under 1000 bar.
- HIP hot isostatic compaction treatment
- the resistance to mechanical fatigue at ambient temperature was measured in tension-compression, with a ratio R (minimum stress / maximum stress) of -1 for round test pieces with a diameter of 5 mm, also machined in the AFNOR shell blanks.
- the creep tests at 300 ° C. were carried out on test pieces machined to a diameter of 4 mm from the same AFNOR blanks, preheated 100 h at 300 ° C. before the actual test. This consisted of subjecting the test piece to a constant stress equal to 30 MPa for a duration of up to 300 h and recording the A strain in% of the test piece. The lower the deformation, the better the creep resistance of the alloy. The samples cast in the alloy which led to the lowest creep result, ie composition C without vanadium, actually broke well before 300 h, with breaking strains of between 2.4 and 4%, which are represented by the R rectangle of Figure 8.
- vanadium has no significant effect on these two properties measured at room temperature.
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Cookers (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL09802550T PL2329053T3 (en) | 2008-07-30 | 2009-07-01 | Casting made from aluminium alloy, having high hot creep and fatigue resistance |
SI200931665A SI2329053T1 (en) | 2008-07-30 | 2009-07-01 | Casting made from aluminium alloy, having high hot creep and fatigue resistance |
HRP20170809TT HRP20170809T1 (en) | 2008-07-30 | 2017-05-29 | Casting made from aluminium alloy, having high hot creep and fatigue resistance |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0804333A FR2934607B1 (en) | 2008-07-30 | 2008-07-30 | ALUMINUM ALLOY MOLDED PART WITH HIGH FATIGUE AND HOT FLUID RESISTANCE |
PCT/FR2009/000807 WO2010012875A1 (en) | 2008-07-30 | 2009-07-01 | Casting made from aluminium alloy, having high hot creep and fatigue resistance |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2329053A1 true EP2329053A1 (en) | 2011-06-08 |
EP2329053B1 EP2329053B1 (en) | 2017-03-08 |
Family
ID=40214024
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09802550.5A Active EP2329053B1 (en) | 2008-07-30 | 2009-07-01 | Casting made from aluminium alloy, having high hot creep and fatigue resistance |
Country Status (16)
Country | Link |
---|---|
US (1) | US9982328B2 (en) |
EP (1) | EP2329053B1 (en) |
JP (1) | JP5437370B2 (en) |
KR (1) | KR101639826B1 (en) |
BR (1) | BRPI0916529B1 (en) |
DK (1) | DK2329053T3 (en) |
ES (1) | ES2625872T3 (en) |
FR (1) | FR2934607B1 (en) |
HR (1) | HRP20170809T1 (en) |
HU (1) | HUE033493T2 (en) |
LT (1) | LT2329053T (en) |
MX (1) | MX2011000739A (en) |
PL (1) | PL2329053T3 (en) |
PT (1) | PT2329053T (en) |
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WO (1) | WO2010012875A1 (en) |
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DE102011078145A1 (en) * | 2011-06-27 | 2012-12-27 | Mahle International Gmbh | Forging method for producing a piston or piston skirt |
WO2013041584A2 (en) | 2011-09-19 | 2013-03-28 | Alcoa Gmbh | Improved aluminum casting alloys containing vanadium |
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RU2525872C1 (en) * | 2013-04-23 | 2014-08-20 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" | FORMATION OF MICROSTRUCTURE OF EUTECTIC Al-Si ALLOY |
US9643651B2 (en) | 2015-08-28 | 2017-05-09 | Honda Motor Co., Ltd. | Casting, hollow interconnecting member for connecting vehicular frame members, and vehicular frame assembly including hollow interconnecting member |
GB2554449A (en) * | 2016-09-29 | 2018-04-04 | Jaguar Land Rover Ltd | A casting alloy |
GB2553366A (en) * | 2016-09-06 | 2018-03-07 | Jaguar Land Rover Ltd | A casting alloy |
KR101846735B1 (en) * | 2016-11-10 | 2018-04-09 | 현대자동차주식회사 | Aluminum alloy for cylinder head and method for manufacturing thereof |
KR101856381B1 (en) * | 2016-11-16 | 2018-05-10 | 현대자동차주식회사 | Aluminum alloy for cylinder head |
CN106636791A (en) * | 2016-12-20 | 2017-05-10 | 重庆顺博铝合金股份有限公司 | Aluminum alloy for preparing automobile body and preparation method thereof |
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US10752980B2 (en) * | 2017-07-28 | 2020-08-25 | Ford Global Technologies, Llc | Advanced cast aluminum alloys for automotive engine application with superior high-temperature properties |
JP7011943B2 (en) * | 2018-01-19 | 2022-02-10 | 昭和電工株式会社 | Aluminum alloy substrate for magnetic recording medium and its manufacturing method, substrate for magnetic recording medium, magnetic recording medium and hard disk drive |
JP7011942B2 (en) * | 2018-01-19 | 2022-02-10 | 昭和電工株式会社 | Aluminum alloy substrate for magnetic recording medium, substrate for magnetic recording medium, magnetic recording medium and hard disk drive |
JP7011944B2 (en) * | 2018-01-19 | 2022-02-10 | 昭和電工株式会社 | Aluminum alloy substrate for magnetic recording medium, substrate for magnetic recording medium, magnetic recording medium and hard disk drive |
CN108588513A (en) * | 2018-08-10 | 2018-09-28 | 合肥工业大学 | A kind of modified A356 aluminium alloys and its multiple ageing hot processing method |
CN112553508B (en) * | 2019-09-10 | 2022-03-18 | 比亚迪股份有限公司 | Aluminum alloy, preparation method thereof and aluminum alloy structural part |
CN111690850A (en) * | 2020-07-15 | 2020-09-22 | 南通鸿劲金属铝业有限公司 | Preparation process of cast aluminum alloy with high yield strength |
US20240018631A1 (en) | 2020-12-07 | 2024-01-18 | Norsk Hydro Asa | A high temperature stable alsicu alloy |
WO2023023704A1 (en) * | 2021-08-23 | 2023-03-02 | A.W. Bell Pty. Ltd. | Improved aluminium based casting alloy |
KR20230105072A (en) * | 2022-01-03 | 2023-07-11 | 현대자동차주식회사 | High Intensity/High Elongation Alloy having High Iron Content and Automobile Product Thereof |
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FR2857378B1 (en) * | 2003-07-10 | 2005-08-26 | Pechiney Aluminium | HIGH-RESISTANCE ALUMINUM ALLOY-MOLDED MOLDED PIECE |
JP2005264301A (en) * | 2004-03-22 | 2005-09-29 | Toyota Central Res & Dev Lab Inc | Casting aluminum alloy, casting of aluminum alloy and manufacturing method therefor |
JP4765400B2 (en) * | 2005-05-18 | 2011-09-07 | 株式会社豊田中央研究所 | Aluminum alloy for semi-solid casting, aluminum alloy casting and manufacturing method thereof |
JP4800864B2 (en) * | 2006-07-03 | 2011-10-26 | 株式会社豊田中央研究所 | compressor |
JP5344527B2 (en) * | 2007-03-30 | 2013-11-20 | 株式会社豊田中央研究所 | Aluminum alloy for casting, aluminum alloy casting and method for producing the same |
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FR2934607A1 (en) | 2010-02-05 |
US9982328B2 (en) | 2018-05-29 |
EP2329053B1 (en) | 2017-03-08 |
BRPI0916529A2 (en) | 2015-11-10 |
KR101639826B1 (en) | 2016-07-14 |
HUE033493T2 (en) | 2017-12-28 |
PL2329053T3 (en) | 2017-08-31 |
ES2625872T3 (en) | 2017-07-20 |
MX2011000739A (en) | 2011-02-24 |
WO2010012875A1 (en) | 2010-02-04 |
PT2329053T (en) | 2017-05-24 |
FR2934607B1 (en) | 2011-04-29 |
SI2329053T1 (en) | 2017-07-31 |
JP5437370B2 (en) | 2014-03-12 |
KR20110050652A (en) | 2011-05-16 |
US20110126947A1 (en) | 2011-06-02 |
LT2329053T (en) | 2017-07-10 |
JP2011529529A (en) | 2011-12-08 |
BRPI0916529B1 (en) | 2018-06-05 |
HRP20170809T1 (en) | 2017-08-11 |
DK2329053T3 (en) | 2017-05-15 |
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