US20050279429A1 - Aluminum alloy for casting-forging, aluminum casting-forging product and processes for production thereof - Google Patents
Aluminum alloy for casting-forging, aluminum casting-forging product and processes for production thereof Download PDFInfo
- Publication number
- US20050279429A1 US20050279429A1 US11/187,794 US18779405A US2005279429A1 US 20050279429 A1 US20050279429 A1 US 20050279429A1 US 18779405 A US18779405 A US 18779405A US 2005279429 A1 US2005279429 A1 US 2005279429A1
- Authority
- US
- United States
- Prior art keywords
- forging
- aluminum
- forged
- cast
- less
- 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.)
- Abandoned
Links
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 54
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 52
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000005242 forging Methods 0.000 title claims description 104
- 238000004519 manufacturing process Methods 0.000 title claims description 40
- 238000000034 method Methods 0.000 title claims description 15
- 230000008569 process Effects 0.000 title description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052802 copper Inorganic materials 0.000 claims abstract description 29
- 239000010949 copper Substances 0.000 claims abstract description 29
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000011777 magnesium Substances 0.000 claims abstract description 28
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 28
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 25
- 239000010703 silicon Substances 0.000 claims abstract description 25
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 19
- 239000011651 chromium Substances 0.000 claims abstract description 19
- 239000000725 suspension Substances 0.000 claims abstract description 18
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000010936 titanium Substances 0.000 claims abstract description 17
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 17
- 239000012535 impurity Substances 0.000 claims abstract description 16
- 239000000047 product Substances 0.000 claims description 75
- 239000000463 material Substances 0.000 claims description 61
- 239000002994 raw material Substances 0.000 claims description 34
- 238000005266 casting Methods 0.000 claims description 25
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 11
- 230000008018 melting Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000012467 final product Substances 0.000 claims description 9
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 abstract description 11
- 229910052748 manganese Inorganic materials 0.000 abstract description 11
- 239000011572 manganese Substances 0.000 abstract description 11
- -1 suspension parts Chemical compound 0.000 abstract 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 21
- 239000000956 alloy Substances 0.000 description 12
- 230000007423 decrease Effects 0.000 description 12
- 239000000446 fuel Substances 0.000 description 11
- 230000035882 stress Effects 0.000 description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 229910045601 alloy Inorganic materials 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 9
- 230000007547 defect Effects 0.000 description 9
- 230000006872 improvement Effects 0.000 description 9
- 230000009467 reduction Effects 0.000 description 9
- 239000013078 crystal Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229910019752 Mg2Si Inorganic materials 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 5
- 239000001569 carbon dioxide Substances 0.000 description 5
- 230000002829 reductive effect Effects 0.000 description 4
- 238000010792 warming Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229910018182 Al—Cu Inorganic materials 0.000 description 1
- 208000019901 Anxiety disease Diseases 0.000 description 1
- 101100285389 Arabidopsis thaliana HLS1 gene Proteins 0.000 description 1
- 101150030345 COP3 gene Proteins 0.000 description 1
- 229910017818 Cu—Mg Inorganic materials 0.000 description 1
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009716 squeeze casting Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
Classifications
-
- 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
- C22F1/05—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 of the Al-Si-Mg type, i.e. containing silicon and magnesium in approximately equal proportions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/26—Making machine elements housings or supporting parts, e.g. axle housings, engine mountings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K3/00—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
-
- C—CHEMISTRY; METALLURGY
- 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
- C22C21/06—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
Definitions
- the present invention relates to a cast aluminum alloy for forging and an aluminum cast-forged product that is used for a vehicular part or the like and is less costly, and a method of manufacturing an aluminum cast-forged product. More particularly, it relates to a cast aluminum alloy for forging that is used to manufacture vehicular suspension parts which are required to be light in weight to improve fuel consumption of an automobile and can use useless forging materials such as flash generated in a forging process, an aluminum cast-forged product that has high mechanical properties and contains particular amounts of silicon, magnesium, copper, and manganese, and a method of manufacturing an aluminum cast-forged product.
- the measures for improving the fuel consumption of the automobile include the use of new power sources such as a fuel cell, natural gas, and electricity, or the hybrid use thereof, the technical improvement in a motor system such as a lean fuel engine and a direct injection engine, and the decrease of running resistance due to improvement in loss of a power transmission system and improvement in vehicle body contours.
- a measure that is most effective and capable of being taken together with any other technology is the reduction in weight of the automobile. If the automobile itself is made light in the weight, the load on the power source is lessened, and the amount of power to be consumed can be saved irrespective of power sources.
- the reduction in weight of the suspension parts of the automobile is an object having a higher priority, because this reduction contributes to the improvement in drivability and riding quality of the automobile.
- frame parts or some parts of the engine have also been regarded as the objects of the reduction in weight, and attempts have been made to use light metal materials therefor.
- the weight lightening technology is broadly divided into a structure design technology and a material technology.
- the change of material used is an easily employable measure for lightening the weight.
- such a material for lightening the weight is generally expensive.
- the material for lightening the weight include resin materials such as FRP, thinned iron sheets using high tensile strength steel sheets, aluminum alloys, magnesium alloys, titanium alloys, ceramics, metallic compound materials, and the like.
- aluminum alloys have fewest drawbacks such as corrosion resistance and the like, and are lowest in cost in the materials for lightening the weight although being higher in cost than iron, and can easily be applied as alternatives without requiring any large change in the basic design of the automobile.
- the aluminum alloys having a density about one-third that of iron, have already been used for many easy-to-manufacture castings such as engine cylinder heads and engine cylinder blocks. These castings are manufactured by high-speed injection molding, a so-called high pressure die casting method, and thus can be manufactured at a relatively low cost with high production efficiency. However, castings having large thickness and high strength cannot be produced. There is a problem that the application of cast parts to suspensions as a part light in weight since a failure of such a part due to insufficient strength directly leads to the safety problem.
- suspension parts which have advanced in studies of the weight reduction technology as examples, the present status of the technology will be described.
- Materials used for the suspension parts such as a steering knuckle and a suspension arm are required to have high corrosion resistance, sufficient properties such as strength and elongation, and few defects, and an A6061 alloy forged product, an AC4CH alloy squeeze cast product (low-speed injection molded product), and the like that meet the requirements have already been used.
- these materials still have an unsolved problem of high cost, so that the application thereof is extremely limited at present.
- JP-A-5-59477 an aluminum alloy for forging in which the coarseness of crystal grains is restrained by controlling a composition, whereby high mechanical properties are attained has been proposed. It is stated that a tensile strength of 40 kgf/mm 2 has been attained because of the improvement in strength of matrix, and the restraint in not coarsening crystal grains by adjusting the composition so as to contain 1.0 to 1.5 wt % of silicon, 0.8 to 1.5 wt % of magnesium, 0.4 to 0.9 wt % of copper, 0.2 to 0.6 wt % of manganese, 0.3 to 0.9 wt % of chromium, and the like.
- JP-A-7-258784 an aluminum alloy material for forging having superior castability and high strength has been proposed in JP-A-7-258784.
- the formation of crack during casting which has been formed in the case where the conventional A6061 alloy is used as the raw material, does not occur, in the case of aluminum alloy forged product obtained by casting continuously a molten metal of an aluminum alloy material in which the composition is adjusted so as to contain 0.8 to 2.0 wt % of silicon, 0.5 to 1.5 wt % of magnesium, 0.5 to 1.0 wt % of copper, 0.4 to 1.5 wt % of manganese, 0.1 to 0.3 wt % of chromium, and the like with controlling a cooling rate in a solidification process, thereafter soaking the resultant, subsequently hot-forging aluminum alloy, thereafter subjecting to a solution heat treatment, and further an aging treatment, when the aluminum alloy forged product is cast into a shape close to a final product.
- JP-A-8-3675 an aluminum alloy for forging having superior mechanical properties and involving the low cost has been proposed. It is stated that the formation of the hot crack does not occur at the time of casting, and that the strength after the forging can be improved by forging, with an upsetting ratio of 10 to 50%, an aluminum alloy whose components have been adjusted so as to contain 0.6 to 3.0 wt % of silicon, 0.2 to 2.0 wt % of magnesium, 0.3 to 1.0 wt % of copper, 0.1 to 0.5 wt % of manganese, 0.1 to 0.5 wt % of chromium, and the like, and also 1.5 wt % or more of Mg 2 Si.
- JP-A-2002-302728 the present inventors also have proposed a thick-wall aluminum processed product which is an aluminum cast-forged product having high tensile strength, proof stress, and elongation and having improved mechanical properties as compared with the conventional cast-forged product, and having superior corrosion resistance and high quality without any defects and involving the low cost, and a method of manufacturing the product.
- a cast aluminum alloy for forging which is the raw material for the forging, an aluminum alloy, characterized in that the alloy contains 0.2 to 2.0 wt % of silicon, 0.35 to 1.2 wt % of magnesium, 0.1 to 0.4 wt % of copper, and 0.01 to 0.08 wt % of manganese.
- the present invention has been developed in view of the above-described conventional problems, and an object thereof is to solve the problems with the conventional art and, more particularly, to provide an aluminum cast-forged product capable of satisfying needs of the market as an aluminum thick-wall processed product and having high tensile strength, proof stress, and elongation; and a method of manufacturing an aluminum cast-forged product. That is, the object is to provide an aluminum alloy material which can be cast/processed like high-concentration products such as AC4CH containing 3 wt % or more of silicon and which can be processed in a final shape of a desired component like AC4CH without requiring low-speed casting, an aluminum cast-forged product cast/forged by the material, and a method of manufacturing an aluminum cast-forged product.
- high-concentration products such as AC4CH containing 3 wt % or more of silicon
- Another object of the present invention is to provide various lightweight parts for vehicles brought about by the above-described aluminum cast-forged product and the method of manufacturing the product, and accordingly to save fuel consumption of automobiles and to reduce the amount of emitted carbon dioxide and to contribute to environmental measures such as the prevention of global warming.
- an aluminum cast-forged product having a sufficient strength capable of meeting needs of market can be obtained by making predetermined amounts of silicon, magnesium, copper, manganese, and chromium, and optionally titanium contain therein, with improving fluidity and castability.
- the present invention has been completed.
- a cast aluminum alloy for forging which is usable for a material for forging, consisting essentially of: 0.6 to 1.8 wt % of silicon; 0.6 to 1.8 wt % of magnesium; 0.8 wt % or less of copper; 0.2 to 1.0 wt % of manganese; 0.25 wt % or less of chromium; 0.0 to 0.15 wt % of titanium; and unavoidable impurities.
- the present cast aluminum alloy for forging in manufacturing various parts for vehicles including suspension parts having mechanical properties capable of satisfying needs of the market such as a tensile strength of 320 MPa or more, a proof stress of 280 MPa or more, and an elongation of 10% or more.
- the aluminum alloy is used to cast a preformed product having a forging ratio of 18 to 60%, and subsequently the preformed product may be cast and formed in the shape of the final product. Accordingly, it is possible to manufacture the parts for vehicles with a lower cost and higher productivity as compared with low-speed casting using AC4CH.
- an aluminum cast-forged product which is manufactured by forging a preformed product cast from the above-described aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities, the aluminum cast-forged product consisting essentially of: 0.6 to 1.8 wt % of silicon; 0.6 to 1.8 wt % of magnesium; 0.8 wt % or less of copper; 0.2 to 1.0 wt % of manganese; 0.25 wt % or less of chromium; 0.0 to 0.15 wt % of titanium; and unavoidable impurities. Therefore, the manufactured aluminum cast-forged product has a sufficient mechanical properties such that the product
- an aluminum cast-forged product consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities
- the method including: a melting step of melting a material for forging which is an aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities at about 680 to 780° C.
- the flash generated at the time of the forging may be reused as the raw material.
- a shape forging ratio of the raw material for forging that is, the preformed material is preferably 18 to 60%. Therefore, it is possible to preferably manufacture the suspension parts for the vehicles, the frames for the vehicles, and the parts for engine by the method of manufacturing an aluminum cast-forged product according to the present invention.
- FIG. 1 is a side view showing one example of an aluminum cast-forged product in accordance with the present invention
- FIGS. 2 ( a ), ( b ), and ( c ) are views showing one example of a method of manufacturing an aluminum cast-forged product of the present invention
- FIG. 2 ( a ) is a schematic explanatory view showing a difference in shape of a preformed material for each forging ratio at the time of casting
- FIG. 2 ( b ) is an enlarged side view showing one example of a cast body in which an internal defect is generated at the time of the casting
- FIG. 2 ( c ) is an enlarged side view showing one example of a cast body in which no internal defect is generated at the time of the casting;
- FIGS. 3 ( a ) and ( b ) are sectional views of the preformed material showing the forging ratio.
- an aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities is used to first cast a preformed material, and next the preformed material is forged to manufacture a cast-forged product having a desired shape.
- the aluminum alloy constituted of the above-described composition it is possible to prepare an aluminum cast-forged product of the present invention, having mechanical properties meeting marketing needs. It is possible to preferably use the product in parts for vehicles in rugged environments, especially suspension parts for automobiles, frames for vehicles, and parts for engines.
- the cast aluminum alloy for forging and the aluminum cast-forged product of the present invention will hereinafter concretely be described.
- the cast aluminum alloy for forging of the present invention is an aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities.
- Silicon serves to enhance fluidity and to improve a casting shrinkage when contained in the aluminum alloy. Also, this element precipitates Mg 2 Si when coexisting with magnesium, and contributes to the improvement in mechanical properties such as elongation, tensile strength, and proof stress.
- the content of silicon is less than 0.6 wt %, a sufficient mechanical property is not secured.
- the content of silicon exceeds 1.8 wt %, the elongation decreases, it is not possible to manufacture the product in accordance with marketing needs, and therefore this is not preferable.
- the content of silicon is preferably 0.8 to 1.3 wt %, further preferably 0.8 to 1.1 wt %.
- 0.6 to 1.8 wt % of magnesium be contained in the cast aluminum alloy for forging. If the content of magnesium is less than 0.6 wt %, the amount of precipitation of Mg 2 Si is undesirably insufficient, and the strength is insufficient. If the content is more than 1.8 wt %, in addition to the insufficient strength, quenching sensitivity decreases, and thus the forging defect is liable to be generated. As a result, the quality of the forged material decreases, and the mechanical property also unfavorably decreases.
- the content is preferably 0.6 to 1.2 wt %, further preferably 0.7 to 1.1 wt %.
- Copper is an element that can improve the strength, when contained in the aluminum alloy.
- the strength higher than that of the conventional forged material is indispensable, it is preferable that copper be contained.
- 0.8 wt % or less of copper be contained in the cast aluminum alloy for forging. If the content of copper is more than 0.8 wt %, the corrosion resistance is deteriorated, the alloy is liable to rust, and the strength cannot unfavorably be maintained over a long period.
- the content is preferably 0.005 wt % or more, less than 0.3 wt %, further preferably more than 0.1 wt %, and less than 0.2 wt %.
- Manganese is an element that restrains the recrystallization of the aluminum alloy and the growth of crystal grains, when contained in the aluminum alloy. As a result, the grain structure in the aluminum alloy is kept to be refined, and the strength is maintained.
- a minute amount of manganese needs to be contained. However, if too much manganese is contained, workability decreases at the time of the forging, also intermetallic compounds are formed, and a decrease in the mechanical properties, especially the elongation, is found.
- 0.2 to 1.0 wt % of manganese be contained in the cast aluminum alloy for forging. If the content of manganese is less than 0.2 wt %, a desired strength cannot sometimes be obtained. If the content is more than 1.0 wt %, formability undesirably decreases, and defects are liable to be generated. The content is more preferably more than 0.5 wt %, and 0.7 wt % or less.
- Chromium forms dispersed particles, and it has an effect of inhibiting a grain boundary from moving after recrystallization, when contained in the aluminum alloy. Therefore, refined crystal grains and sub-crystal grains can be obtained. It is preferable that 0.25 wt % or less of chromium be contained in the cast aluminum alloy for forging. Even when the content of chromium exceeds 0.25 wt %, the desired effect cannot sometimes unfavorably be attained. The content is more preferably 0.04 to 0.25 wt %.
- Titanium refines the crystal grains of a casting, and enhances workability at the time of the forging, when contained in the aluminum alloy. It is preferable that 0.0 to 0.15 wt % of titanium be contained in the cast aluminum alloy for forging. It is to be noted that even when titanium is not contained, a considerably large trouble is not caused.
- the metals contained in minute amounts in the cast aluminum alloy for forging and the aluminum cast-forged product in accordance with the present invention are as described above, and the balance is unavoidably contained impurities and aluminum. It is preferable that the unavoidably contained impurities be contained by an amount as small as possible.
- the content is less than 0.1 wt %, preferably 0.05 wt % or less.
- the flash generated at the time of the forging be used as the raw material.
- This raw material is adjusted so as to allow the resulting composition to form the intended aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidably contained impurities by measures such as preparing of metals that are insufficient using pure metals, and mixing with another aluminum alloy.
- the unavoidable impurities be not contained in the aluminum alloy by 0.1 wt % or more in total.
- the temperature of a mold is preferably adjusted at about 60 to 150° C.
- the mold preferably has a shape such that a forging ratio is about 18 to 60%, assuming that the shape of the final forged product is 100%, because the strength is enhanced by the subsequent forging and the forging process can further be simplified. That is, when the forging ratio is set to about 18 to 60%, the strength improving effect due to the forging and the cost reduction due to a simplified forging process are balanced.
- the forging ratio means a value representing the degree of forming.
- a forging ratio R is represented by the following equation.
- R [%] ( D 1 ⁇ D 2 )/ D 1 ⁇ 100 ( D 1 > D 2 )
- the forging ratio is represented by the following equation.
- R [%] ( D 2 ⁇ D 1 )/ D 1 ⁇ 100 ( D 2 > D 1 )
- the fact that the so-called preformed material having a shape such that the forging ratio is about 18 to 60% assuming that the shape of the final forged product is 100% is obtained by the casting means that the preformed material having a shape such that the forging ratio determined using the thickness of each portion of the raw material for forging and the thickness of each corresponding portion in the final product obtained by forging the raw material for forging is about 18 to 60% in each portion is obtained by the casting.
- the cast material obtained/molded using a casting apparatus that is, the raw material for forging is heated to a surface temperature at about 380° C. to a melting point or less and is stamped by a forging press to obtain a roughly forged material.
- the roughly forged material is cooled, thereafter heated again to the surface temperature at about 380° C. to the melting point or less, and is finished/stamped by the forging press to obtain a finish forged material.
- the finish forged material is subjected to clipping flash and heat treatment such as T6 treatment to obtain a forged product.
- the load of the forging press is about 2600 to 2800 tons for rough forging and about 3200 to 3800 tons for finish forging.
- the aluminum cast-forged product in accordance with the present invention can be obtained.
- the flash generated by the forge-pressing and clipping flash in the manufacturing process of the present invention is collected by a flash removing machine, and can be reused as the raw material for the aluminum cast-forged product of the present invention. Therefore, all of the raw materials for forging are recycled, and are not disposed of as wastes or are not used as an inexpensive raw material for forging.
- the mold for the casting is brought closer to the shape of the product as compared with the conventional raw material for forging so that the forging ratio is about 18 to 60% assuming that the shape of the final forged product is 100% while achieving the strength improving effect by the forging, by which the pressing is facilitated. Therefore, unlike the conventional forging process, steps of extruding, cutting, heating, rough forging, finish forging, and clipping flash are not observed, thus the manufacturing process can be simplified, and the manufacturing cost can be reduced.
- FIG. 1 is a diagram showing one example of the aluminum cast-forged product of the present invention.
- a steering knuckle 40 which is the part for the automobile is shown.
- a small amount of copper was added to scraps of A6082 alloy to prepare a raw material forming the aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidably contained impurities.
- the steering knuckle 40 having a shape shown in FIG. 1 was manufactured in accordance with the following steps.
- the raw material for forging having a shape with a forging ratio of 30% assuming that the shape of the final steering knuckle 40 was 100% was cast at a mold temperature of 100° C.
- die forging was performed using a forging press at a rough forging temperature of 395° C. (surface temperature) by applying a rough forging load of 2770 tons to obtain a roughly forged material.
- the roughly forged material was subjected to the die forging again using the forging press at a finish forging temperature of 460° C. (surface temperature) by applying a finish forging load of 3260 tons. Finally, the finish forged material was trimmed.
- Example 2 After a solution heat treatment which was a T4 treatment by heating the finish forged material at 530° C. for three hours, the finish forged material was cooled. Then, an aging treatment was done as T6 treatment by heating the finish forged material at 180° C. for six hours. Thus, the steering knuckle 40 was obtained as a product.
- Example 2 operations similar to those of Example 1 were repeated to obtain the steering knuckle 40 , except that the molten metal temperature was set to 720° C. and the mold temperature was set to 125° C. Temperature conditions and load conditions are given in Tables 1 and 2, respectively. TABLE 1 Molten metal temperature Mold temperature (° C.) (° C.) Example 1 728 100
- Example 2 720 125
- Examples 1 and 2 reveal that the mechanical properties of the aluminum cast-forged product in accordance with the present invention were capable of clearing the standards as needs of market in all of the tensile strength, proof stress, and elongation.
- an aluminum cast-forged product further satisfying needs of market in mechanical properties such as a tensile strength, proof stress, and elongation with a simpler manufacturing process with good productivity and at low cost.
- various lightweight and inexpensive vehicular parts such as suspension parts for vehicles, frames for the vehicles, and parts for engines are provided. Through lightening of weights of the vehicles, fuel consumption of automobiles is saved. As a result, emitted carbon dioxide is reduced, and an effect of contribution to prevention of global warming is also attained.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Forging (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
There is disclosed a cast-forged product of an aluminum alloy consisting essentially of: 0.6 to 1.8 wt % of silicon; 0.6 to 1.8 wt % of magnesium; 0.8 wt % or less of copper; 0.2 to 1.0 wt % of manganese; 0.25 wt % or less of chromium; 0.0 to 0.15 wt % of titanium; and unavoidably contained impurities. When the product is used as various parts for automobiles formed of aluminum, such as suspension parts, frames, and parts for engines, the product is more superior in mechanical properties such as a tensile strength, proof stress, and elongation, and can be manufactured with a low cost.
Description
- 1. Field of the Invention
- The present invention relates to a cast aluminum alloy for forging and an aluminum cast-forged product that is used for a vehicular part or the like and is less costly, and a method of manufacturing an aluminum cast-forged product. More particularly, it relates to a cast aluminum alloy for forging that is used to manufacture vehicular suspension parts which are required to be light in weight to improve fuel consumption of an automobile and can use useless forging materials such as flash generated in a forging process, an aluminum cast-forged product that has high mechanical properties and contains particular amounts of silicon, magnesium, copper, and manganese, and a method of manufacturing an aluminum cast-forged product.
- 2. Description of the Related Art
- It is said that global warming, which is one of global environmental problems, is greatly affected by carbon dioxide produced by all human activities, and a reduction in carbon dioxide discharged from factories and electric power plants and a reduction in fuel consumption of automobiles are strongly required all over the world. At the third conference of the United Nations Framework Convention on Climate Change, so-called Global Warming Prevention Conference COP3, held in Kyoto in 1997, Japan promised that the emission of gas causing greenhouse effect which mainly contains carbon dioxide will be decreased by 6% on average of values in 2008 through 2012 as compared with 1990. Based on this promise, regarding the fuel consumption rate of automobiles, the target reference value of fuel consumption rate under vehicle weight classification was determined with the target fiscal year being fiscal 2010 for gasoline engine and fiscal year 2005 for diesel engine. Also, in the taxation system, measures were taken to treat low-pollution cars favorably. Hereafter, auto manufacturers will strongly be pressed to promote technology development to improve fuel consumption and to develop an automobile having improved fuel consumption, with further progress of understanding towards environmental problems by automobile purchasers and users. Such development will be needed to win competition among the auto manufactures.
- The measures for improving the fuel consumption of the automobile include the use of new power sources such as a fuel cell, natural gas, and electricity, or the hybrid use thereof, the technical improvement in a motor system such as a lean fuel engine and a direct injection engine, and the decrease of running resistance due to improvement in loss of a power transmission system and improvement in vehicle body contours. Among these measures, a measure that is most effective and capable of being taken together with any other technology is the reduction in weight of the automobile. If the automobile itself is made light in the weight, the load on the power source is lessened, and the amount of power to be consumed can be saved irrespective of power sources. As one measure for the reduction in weight of the automobile, the reduction in weight of the suspension parts of the automobile is an object having a higher priority, because this reduction contributes to the improvement in drivability and riding quality of the automobile. In recent years, frame parts or some parts of the engine have also been regarded as the objects of the reduction in weight, and attempts have been made to use light metal materials therefor.
- Incidentally, when the lightening in the weight of automobile is intended, the up in the cost remains as a theme to be solved. The weight lightening technology is broadly divided into a structure design technology and a material technology. In comparison with the drastic improvement in vehicle body structure and construction elements, the change of material used is an easily employable measure for lightening the weight. However, such a material for lightening the weight is generally expensive. Examples of the material for lightening the weight include resin materials such as FRP, thinned iron sheets using high tensile strength steel sheets, aluminum alloys, magnesium alloys, titanium alloys, ceramics, metallic compound materials, and the like. Among these materials, aluminum alloys have fewest drawbacks such as corrosion resistance and the like, and are lowest in cost in the materials for lightening the weight although being higher in cost than iron, and can easily be applied as alternatives without requiring any large change in the basic design of the automobile.
- The aluminum alloys, having a density about one-third that of iron, have already been used for many easy-to-manufacture castings such as engine cylinder heads and engine cylinder blocks. These castings are manufactured by high-speed injection molding, a so-called high pressure die casting method, and thus can be manufactured at a relatively low cost with high production efficiency. However, castings having large thickness and high strength cannot be produced. There is a problem that the application of cast parts to suspensions as a part light in weight since a failure of such a part due to insufficient strength directly leads to the safety problem.
- Referring to the suspension parts which have advanced in studies of the weight reduction technology as examples, the present status of the technology will be described. Materials used for the suspension parts such as a steering knuckle and a suspension arm are required to have high corrosion resistance, sufficient properties such as strength and elongation, and few defects, and an A6061 alloy forged product, an AC4CH alloy squeeze cast product (low-speed injection molded product), and the like that meet the requirements have already been used. However, these materials still have an unsolved problem of high cost, so that the application thereof is extremely limited at present.
- Reasons why so-called aluminum products formed only by forging, such as the conventional A6061 alloy forged product are high in cost lie in that the number of manufacturing processes is large and that the raw material for forging itself is expensive and that wastes such as flash are caused during the manufacturing process and that useless materials such as the flash cannot be recycled as the raw material for forging. Also, for a squeeze casting, because of a large number of processes and a low injection speed, the productivity is low and the cost reduction cannot be attained.
- Thus, in particular, in order to reduce the weight of the vehicular part, an aluminum product having superior corrosion resistance, strength, and elongation, no defects, and a low cost has been demanded. To meet this demand, various improved aluminum alloys have heretofore been proposed as a material for manufacturing an aluminum product.
- According to JP-A-5-59477, an aluminum alloy for forging in which the coarseness of crystal grains is restrained by controlling a composition, whereby high mechanical properties are attained has been proposed. It is stated that a tensile strength of 40 kgf/mm2 has been attained because of the improvement in strength of matrix, and the restraint in not coarsening crystal grains by adjusting the composition so as to contain 1.0 to 1.5 wt % of silicon, 0.8 to 1.5 wt % of magnesium, 0.4 to 0.9 wt % of copper, 0.2 to 0.6 wt % of manganese, 0.3 to 0.9 wt % of chromium, and the like.
- Although the strength is increased, there arises a new problem that a low cost cannot be attained, and the corrosion resistance is deteriorated because a larger amount of copper is contained than the conventional raw material for forging (A6061 alloy), and also the fluidity decreases so that the castability is poor because much magnesium is contained.
- Also, an aluminum alloy material for forging having superior castability and high strength has been proposed in JP-A-7-258784. According to this document, the formation of crack during casting, which has been formed in the case where the conventional A6061 alloy is used as the raw material, does not occur, in the case of aluminum alloy forged product obtained by casting continuously a molten metal of an aluminum alloy material in which the composition is adjusted so as to contain 0.8 to 2.0 wt % of silicon, 0.5 to 1.5 wt % of magnesium, 0.5 to 1.0 wt % of copper, 0.4 to 1.5 wt % of manganese, 0.1 to 0.3 wt % of chromium, and the like with controlling a cooling rate in a solidification process, thereafter soaking the resultant, subsequently hot-forging aluminum alloy, thereafter subjecting to a solution heat treatment, and further an aging treatment, when the aluminum alloy forged product is cast into a shape close to a final product.
- In this proposal, although castability is improved, the low cost cannot be attained yet as compared with the conventional raw material for forging (A6061 alloy), also the corrosion resistance is deteriorated because much copper is contained, and there remains anxiety when this material is used for the suspension part. Also, there arises a problem that the fluidity decreases because much magnesium is contained, and the above-described rigorous control is needed in the casting process, and the manufacturing cost rather increases.
- Furthermore, according to JP-A-8-3675, an aluminum alloy for forging having superior mechanical properties and involving the low cost has been proposed. It is stated that the formation of the hot crack does not occur at the time of casting, and that the strength after the forging can be improved by forging, with an upsetting ratio of 10 to 50%, an aluminum alloy whose components have been adjusted so as to contain 0.6 to 3.0 wt % of silicon, 0.2 to 2.0 wt % of magnesium, 0.3 to 1.0 wt % of copper, 0.1 to 0.5 wt % of manganese, 0.1 to 0.5 wt % of chromium, and the like, and also 1.5 wt % or more of Mg2Si.
- In this proposal, although a shape close to that of the final product can be formed at the time of the casting, and the manufacturing cost can be reduced because the forging can be performed by omitting an extrusion process, there arises a problem in that the strength decreases because an excessive amount of manganese is contained. Manganese is an element capable of restraining the growth of aluminum crystal grains, keeping the gain structure to be refined, and improving the strength. If the content thereof is high, however, intermetallic compounds are liable to be formed, and the strength is rather decreased.
- In JP-A-2002-302728, the present inventors also have proposed a thick-wall aluminum processed product which is an aluminum cast-forged product having high tensile strength, proof stress, and elongation and having improved mechanical properties as compared with the conventional cast-forged product, and having superior corrosion resistance and high quality without any defects and involving the low cost, and a method of manufacturing the product. In this proposal, there is proposed, as a cast aluminum alloy for forging which is the raw material for the forging, an aluminum alloy, characterized in that the alloy contains 0.2 to 2.0 wt % of silicon, 0.35 to 1.2 wt % of magnesium, 0.1 to 0.4 wt % of copper, and 0.01 to 0.08 wt % of manganese.
- When the above-described material is used, a desired effect can be attained. However, in respect of the mechanical strength, it cannot be said that the material can sufficiently satisfy needs of the market, depending on use conditions. It is the present situation that there still exists a demand for a material more superior in the mechanical strength.
- There has been a demand for a low-cost aluminum product which is more superior in mechanical properties such as the tensile strength, proof stress, and elongation and which can be applied as various components for automobiles such as the suspension components, frames, and engine parts and which involves the low cost, but it is the present situation that an appropriate aluminum product has not been proposed yet.
- The present invention has been developed in view of the above-described conventional problems, and an object thereof is to solve the problems with the conventional art and, more particularly, to provide an aluminum cast-forged product capable of satisfying needs of the market as an aluminum thick-wall processed product and having high tensile strength, proof stress, and elongation; and a method of manufacturing an aluminum cast-forged product. That is, the object is to provide an aluminum alloy material which can be cast/processed like high-concentration products such as AC4CH containing 3 wt % or more of silicon and which can be processed in a final shape of a desired component like AC4CH without requiring low-speed casting, an aluminum cast-forged product cast/forged by the material, and a method of manufacturing an aluminum cast-forged product. Another object of the present invention is to provide various lightweight parts for vehicles brought about by the above-described aluminum cast-forged product and the method of manufacturing the product, and accordingly to save fuel consumption of automobiles and to reduce the amount of emitted carbon dioxide and to contribute to environmental measures such as the prevention of global warming.
- As a result of various studies on raw materials and manufacturing method for the thick-wall aluminum product to solve the above problems, the present inventors have found that an aluminum cast-forged product having a sufficient strength capable of meeting needs of market can be obtained by making predetermined amounts of silicon, magnesium, copper, manganese, and chromium, and optionally titanium contain therein, with improving fluidity and castability. Thus, the present invention has been completed.
- That is, according to the present invention, there is provided a cast aluminum alloy for forging which is usable for a material for forging, consisting essentially of: 0.6 to 1.8 wt % of silicon; 0.6 to 1.8 wt % of magnesium; 0.8 wt % or less of copper; 0.2 to 1.0 wt % of manganese; 0.25 wt % or less of chromium; 0.0 to 0.15 wt % of titanium; and unavoidable impurities. It is possible to use the present cast aluminum alloy for forging in manufacturing various parts for vehicles including suspension parts having mechanical properties capable of satisfying needs of the market such as a tensile strength of 320 MPa or more, a proof stress of 280 MPa or more, and an elongation of 10% or more.
- To use the material in manufacturing a desired final product, assuming that a shape of the final product is 100%, the aluminum alloy is used to cast a preformed product having a forging ratio of 18 to 60%, and subsequently the preformed product may be cast and formed in the shape of the final product. Accordingly, it is possible to manufacture the parts for vehicles with a lower cost and higher productivity as compared with low-speed casting using AC4CH.
- Moreover, according to the present invention, there is also provided an aluminum cast-forged product which is manufactured by forging a preformed product cast from the above-described aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities, the aluminum cast-forged product consisting essentially of: 0.6 to 1.8 wt % of silicon; 0.6 to 1.8 wt % of magnesium; 0.8 wt % or less of copper; 0.2 to 1.0 wt % of manganese; 0.25 wt % or less of chromium; 0.0 to 0.15 wt % of titanium; and unavoidable impurities. Therefore, the manufactured aluminum cast-forged product has a sufficient mechanical properties such that the product is usable as the suspension parts for the vehicles, the frames for the vehicles, and the parts for the engines.
- Furthermore, according to the present invention, there is provided a method of manufacturing an aluminum cast-forged product consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities, the method including: a melting step of melting a material for forging which is an aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities at about 680 to 780° C. to obtain a molten metal; a casting step of casting the obtained molten metal at a mold temperature of about 60 to 150° C. to obtain a raw material for forging; a rough forging step of heating the raw material for forging to a surface temperature at about 380° C. to a melting point or less and forging the raw material to obtain a roughly forged material; a finish forging step of heating the roughly forged material to a surface temperature at about 380° C. to the melting point or less and forging the roughly forged material to obtain a finish forged material; and a clipping flash step of removing flash from the finish forged material to obtain a final product.
- For the material for forging, while the respective components are adjusted so as to obtain the composition of the aluminum alloy according to the present invention, the flash generated at the time of the forging may be reused as the raw material. It is to be noted that assuming that the shape of the final product is 100%, a shape forging ratio of the raw material for forging, that is, the preformed material is preferably 18 to 60%. Therefore, it is possible to preferably manufacture the suspension parts for the vehicles, the frames for the vehicles, and the parts for engine by the method of manufacturing an aluminum cast-forged product according to the present invention.
-
FIG. 1 is a side view showing one example of an aluminum cast-forged product in accordance with the present invention; - FIGS. 2(a), (b), and (c) are views showing one example of a method of manufacturing an aluminum cast-forged product of the present invention,
FIG. 2 (a) is a schematic explanatory view showing a difference in shape of a preformed material for each forging ratio at the time of casting,FIG. 2 (b) is an enlarged side view showing one example of a cast body in which an internal defect is generated at the time of the casting, andFIG. 2 (c) is an enlarged side view showing one example of a cast body in which no internal defect is generated at the time of the casting; and - FIGS. 3(a) and (b) are sectional views of the preformed material showing the forging ratio.
- The numerical references used in the drawings denote respectively a part, an apparatus, a portion or the like as specified below:
- 21, 22 . . . columnar test piece, 40 . . . steering knuckle, 41, 42, 43, 44 . . . position from which test piece was taken, and 50 . . . internal defect.
- Hereunder, embodiments of a cast aluminum alloy for forging, an aluminum cast-forged product, and a method of manufacturing an aluminum cast-forged product in accordance with the present invention will be described in detail. The present invention is not construed by being limited to these embodiments, and various changes, modifications, and improvements can be made based on the knowledge of those skilled in the art as far as such changes, modifications, or improvements are within the scope of the invention.
- In the present invention, an aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities is used to first cast a preformed material, and next the preformed material is forged to manufacture a cast-forged product having a desired shape. When the aluminum alloy constituted of the above-described composition is used, it is possible to prepare an aluminum cast-forged product of the present invention, having mechanical properties meeting marketing needs. It is possible to preferably use the product in parts for vehicles in rugged environments, especially suspension parts for automobiles, frames for vehicles, and parts for engines.
- The cast aluminum alloy for forging and the aluminum cast-forged product of the present invention will hereinafter concretely be described.
- The cast aluminum alloy for forging of the present invention is an aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities.
- Silicon serves to enhance fluidity and to improve a casting shrinkage when contained in the aluminum alloy. Also, this element precipitates Mg2Si when coexisting with magnesium, and contributes to the improvement in mechanical properties such as elongation, tensile strength, and proof stress. When the content of silicon is less than 0.6 wt %, a sufficient mechanical property is not secured. On the other hand, when the content of silicon exceeds 1.8 wt %, the elongation decreases, it is not possible to manufacture the product in accordance with marketing needs, and therefore this is not preferable. It is to be noted that the content of silicon is preferably 0.8 to 1.3 wt %, further preferably 0.8 to 1.1 wt %.
- Magnesium precipitates Mg2Si in a matrix, when coexisting with silicon, and improves the mechanical properties such as the elongation, tensile strength, and proof stress when contained in the aluminum alloy. Since the present invention provides an aluminum cast-forged product substituted for the conventional forged product although being low in cost, the strength higher than that of the conventional product is indispensable, and magnesium needs to be contained. However, even if much magnesium is contained, there is no increase in strength. With too much content, since magnesium is an element liable to be oxidized, oxidation of molten metal is accelerated, the fluidity decreases, and the casting defect is liable to be generated. Also, the corrosion resistance is deteriorated, so that the product cannot withstand harsh service environments. Therefore, a rather low content is preferable.
- It is preferable that 0.6 to 1.8 wt % of magnesium be contained in the cast aluminum alloy for forging. If the content of magnesium is less than 0.6 wt %, the amount of precipitation of Mg2Si is undesirably insufficient, and the strength is insufficient. If the content is more than 1.8 wt %, in addition to the insufficient strength, quenching sensitivity decreases, and thus the forging defect is liable to be generated. As a result, the quality of the forged material decreases, and the mechanical property also unfavorably decreases. The content is preferably 0.6 to 1.2 wt %, further preferably 0.7 to 1.1 wt %.
- Copper is an element that can improve the strength, when contained in the aluminum alloy. For a copper-containing forged material, an Al—Cu or Al—Cu—Mg based precipitate yielded by a so-called aging treatment, in which the forged material is left to stand at ordinary temperature after cooled and crystals are precipitated for a long period of time, can be obtained. Accordingly, a strength improving function by Mg2Si precipitated as described above is promoted to enhance the strength. In the present invention, since the strength higher than that of the conventional forged material is indispensable, it is preferable that copper be contained. However, in consideration of an application to products in which corrosion resistance is regarded as most important, such as an automobile suspension part, if too much copper, liable to be oxidized, is contained, the forged material is easily corroded, and it is therefore preferable that the content of copper be controlled to be as low as possible.
- It is preferable that 0.8 wt % or less of copper be contained in the cast aluminum alloy for forging. If the content of copper is more than 0.8 wt %, the corrosion resistance is deteriorated, the alloy is liable to rust, and the strength cannot unfavorably be maintained over a long period. The content is preferably 0.005 wt % or more, less than 0.3 wt %, further preferably more than 0.1 wt %, and less than 0.2 wt %.
- Manganese is an element that restrains the recrystallization of the aluminum alloy and the growth of crystal grains, when contained in the aluminum alloy. As a result, the grain structure in the aluminum alloy is kept to be refined, and the strength is maintained. In the present invention, since it is necessary to maintain the mechanical properties such as the elongation, tensile strength, and proof stress over the long period, a minute amount of manganese needs to be contained. However, if too much manganese is contained, workability decreases at the time of the forging, also intermetallic compounds are formed, and a decrease in the mechanical properties, especially the elongation, is found.
- It is preferable that 0.2 to 1.0 wt % of manganese be contained in the cast aluminum alloy for forging. If the content of manganese is less than 0.2 wt %, a desired strength cannot sometimes be obtained. If the content is more than 1.0 wt %, formability undesirably decreases, and defects are liable to be generated. The content is more preferably more than 0.5 wt %, and 0.7 wt % or less.
- Chromium forms dispersed particles, and it has an effect of inhibiting a grain boundary from moving after recrystallization, when contained in the aluminum alloy. Therefore, refined crystal grains and sub-crystal grains can be obtained. It is preferable that 0.25 wt % or less of chromium be contained in the cast aluminum alloy for forging. Even when the content of chromium exceeds 0.25 wt %, the desired effect cannot sometimes unfavorably be attained. The content is more preferably 0.04 to 0.25 wt %.
- Titanium refines the crystal grains of a casting, and enhances workability at the time of the forging, when contained in the aluminum alloy. It is preferable that 0.0 to 0.15 wt % of titanium be contained in the cast aluminum alloy for forging. It is to be noted that even when titanium is not contained, a considerably large trouble is not caused.
- The metals contained in minute amounts in the cast aluminum alloy for forging and the aluminum cast-forged product in accordance with the present invention are as described above, and the balance is unavoidably contained impurities and aluminum. It is preferable that the unavoidably contained impurities be contained by an amount as small as possible. The content is less than 0.1 wt %, preferably 0.05 wt % or less.
- It is to be noted that in a casting/forging method according to the present invention, flash generated in the forging process and accounting for about 30% of the generally used raw material can be recovered and reused as the raw material of the aluminum alloy according to the present invention. Therefore, in the present invention, the cost of raw materials can be reduced.
- Next, the method of manufacturing an aluminum cast-forged product of the present invention will be described.
- As described above, it is preferable that the flash generated at the time of the forging be used as the raw material. This raw material is adjusted so as to allow the resulting composition to form the intended aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidably contained impurities by measures such as preparing of metals that are insufficient using pure metals, and mixing with another aluminum alloy. At this time, it is preferable that the unavoidable impurities be not contained in the aluminum alloy by 0.1 wt % or more in total.
- These raw materials are charged in a melting furnace and is heated to a temperature at about 680 to 780° C. to be melted, and next is charged into a holding furnace where a degassing treatment and deoxidizing treatment are done to obtain a molten metal. In this case, the temperature of a mold is preferably adjusted at about 60 to 150° C. Also, the mold preferably has a shape such that a forging ratio is about 18 to 60%, assuming that the shape of the final forged product is 100%, because the strength is enhanced by the subsequent forging and the forging process can further be simplified. That is, when the forging ratio is set to about 18 to 60%, the strength improving effect due to the forging and the cost reduction due to a simplified forging process are balanced.
- Herein, the forging ratio means a value representing the degree of forming. For example, as shown in
FIG. 3 (a), when a material A with an initial thickness D1 is formed by a load F and the thickness is changed to D2 after forming as shown inFIG. 3 (b), a forging ratio R is represented by the following equation.
R[%]=(D 1−D 2)/D 1×100 (D 1>D 2)
However, when the thickness D2 after the forming is larger than the initial thickness, the forging ratio is represented by the following equation.
R[%]=(D 2−D 1)/D 1×100 (D 2>D 1) - That is, in the present invention, the fact that the so-called preformed material having a shape such that the forging ratio is about 18 to 60% assuming that the shape of the final forged product is 100% is obtained by the casting means that the preformed material having a shape such that the forging ratio determined using the thickness of each portion of the raw material for forging and the thickness of each corresponding portion in the final product obtained by forging the raw material for forging is about 18 to 60% in each portion is obtained by the casting.
- Next, the cast material obtained/molded using a casting apparatus, that is, the raw material for forging is heated to a surface temperature at about 380° C. to a melting point or less and is stamped by a forging press to obtain a roughly forged material. The roughly forged material is cooled, thereafter heated again to the surface temperature at about 380° C. to the melting point or less, and is finished/stamped by the forging press to obtain a finish forged material. The finish forged material is subjected to clipping flash and heat treatment such as T6 treatment to obtain a forged product. For example, to manufacture a steering knuckle which is one of the suspension parts for the automobiles, the load of the forging press is about 2600 to 2800 tons for rough forging and about 3200 to 3800 tons for finish forging. By this manufacturing process, the aluminum cast-forged product in accordance with the present invention can be obtained.
- In the present invention, the flash generated by the forge-pressing and clipping flash in the manufacturing process of the present invention is collected by a flash removing machine, and can be reused as the raw material for the aluminum cast-forged product of the present invention. Therefore, all of the raw materials for forging are recycled, and are not disposed of as wastes or are not used as an inexpensive raw material for forging.
- In the method of manufacturing an aluminum cast-forged product of the present invention, after the raw material is melted to obtain the molten metal, the mold for the casting is brought closer to the shape of the product as compared with the conventional raw material for forging so that the forging ratio is about 18 to 60% assuming that the shape of the final forged product is 100% while achieving the strength improving effect by the forging, by which the pressing is facilitated. Therefore, unlike the conventional forging process, steps of extruding, cutting, heating, rough forging, finish forging, and clipping flash are not observed, thus the manufacturing process can be simplified, and the manufacturing cost can be reduced.
- Examples of the present invention will hereinafter be described, but the present invention is not limited to these examples.
-
FIG. 1 is a diagram showing one example of the aluminum cast-forged product of the present invention. Asteering knuckle 40 which is the part for the automobile is shown. A small amount of copper was added to scraps of A6082 alloy to prepare a raw material forming the aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidably contained impurities. Using this raw material, thesteering knuckle 40 having a shape shown inFIG. 1 was manufactured in accordance with the following steps. - After the raw material was melted at a molten metal temperature of 728° C. to obtain the molten metal, the raw material for forging having a shape with a forging ratio of 30% assuming that the shape of the
final steering knuckle 40 was 100% was cast at a mold temperature of 100° C. Next, die forging was performed using a forging press at a rough forging temperature of 395° C. (surface temperature) by applying a rough forging load of 2770 tons to obtain a roughly forged material. Then, the roughly forged material was subjected to the die forging again using the forging press at a finish forging temperature of 460° C. (surface temperature) by applying a finish forging load of 3260 tons. Finally, the finish forged material was trimmed. After a solution heat treatment which was a T4 treatment by heating the finish forged material at 530° C. for three hours, the finish forged material was cooled. Then, an aging treatment was done as T6 treatment by heating the finish forged material at 180° C. for six hours. Thus, thesteering knuckle 40 was obtained as a product. In Example 2, operations similar to those of Example 1 were repeated to obtain thesteering knuckle 40, except that the molten metal temperature was set to 720° C. and the mold temperature was set to 125° C. Temperature conditions and load conditions are given in Tables 1 and 2, respectively.TABLE 1 Molten metal temperature Mold temperature (° C.) (° C.) Example 1 728 100 Example 2 720 125 -
TABLE 2 Rough forging Finish forging Surface Surface temperature temperature Load (ton) (° C.) Load (ton) (° C.) Example 1 2770 395 3260 460 Example 2 2730 400 3780 445 - The test pieces were cut out from thus obtained
steering knuckle 40, and tensile strength, proof stress, and elongation were measured as mechanical properties. The results are shown in Table 3.TABLE 3 Tensile Proof strength stress Elongation (MPa) (MPa) [%] Example 1 358 323 14.7 Example 2 378.6 335.8 14.3 Required value 320 280 10 from market - The results of Examples 1 and 2 reveal that the mechanical properties of the aluminum cast-forged product in accordance with the present invention were capable of clearing the standards as needs of market in all of the tensile strength, proof stress, and elongation.
- As described above, in accordance with the present invention, there is provided an aluminum cast-forged product further satisfying needs of market in mechanical properties such as a tensile strength, proof stress, and elongation with a simpler manufacturing process with good productivity and at low cost. Moreover, by this aluminum cast-forged product, various lightweight and inexpensive vehicular parts such as suspension parts for vehicles, frames for the vehicles, and parts for engines are provided. Through lightening of weights of the vehicles, fuel consumption of automobiles is saved. As a result, emitted carbon dioxide is reduced, and an effect of contribution to prevention of global warming is also attained.
Claims (9)
1. (canceled)
2. A use of an aluminum alloy in manufacturing an aluminum cast-forged product, wherein a preformed material is cast from the aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidably contained impurities, and the preformed material is forged to manufacture an aluminum cast-forged product.
3. The use in manufacturing an aluminum cast-forged product according to claim 2 , wherein the preformed material has a shape indicating a forging ratio R of 18 to 60%, wherein the forging ratio is given by either one of following equations:
R[%]=(D 1−D 2)/D 1×100 (D 1>D 2), or
R[%]=(D 2−D 1)/D 1×100 (D 2>D 1).
4. The use in manufacturing an aluminum cast-forged product according to claim 2 , wherein the aluminum cast-forged product is a suspension part for a vehicle, a frame for the vehicle, or a part for an engine.
5. The use in manufacturing an aluminum cast-forged product according to claim 3 , wherein an aluminum cast-forged product is a suspension part for a vehicle, a frame for the vehicle, or a part for an engine.
6. A method of manufacturing an aluminum cast-forged product consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and unavoidable impurities, the method including:
a melting step of melting an aluminum alloy consisting essentially of 0.6 to 1.8 wt % of silicon, 0.6 to 1.8 wt % of magnesium, 0.8 wt % or less of copper, 0.2 to 1.0 wt % of manganese, 0.25 wt % or less of chromium, 0.0 to 0.15 wt % of titanium, and the unavoidable impurities at about 680 to 780° C. to obtain a molten metal;
a casting step of casting the obtained molten metal at a mold temperature of about 60 to 150° C. to obtain a preformed material which is a raw material for forging;
a rough forging step of heating the raw material for forging to a surface temperature at about 380° C. to a melting point or less and forging the raw material to obtain a roughly forged material;
a finish forging step of heating the roughly forged material to a surface temperature at about 380° C. to the melting point or less and forging the roughly forged material to obtain a finish forged material; and
a clipping flash step of removing flash from the finish forged material to obtain a final product.
7. The method according to claim 6 , wherein the aluminum alloy includes the flash generated at the time of the forging as a portion of a raw material.
8. The method according to claim 7 , wherein a forging ratio R of the shape of a preformed material is in a range of 18 to 60, wherein the forging ratio R is given by either one of following equations:
R[%]=(D 1−D 2)/D 1×100 (D 1>D 2), or
R[%]=(D 2−D 1)/D 1×100 (D 2>D 1).
9.-14. (canceled)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/187,794 US20050279429A1 (en) | 2002-10-01 | 2005-07-25 | Aluminum alloy for casting-forging, aluminum casting-forging product and processes for production thereof |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002288455 | 2002-10-01 | ||
JP2002-288455 | 2002-10-01 | ||
US10/674,811 US20040151615A1 (en) | 2002-10-01 | 2003-10-01 | Cast aluminum alloy for forging, and aluminum cast-forged product and method of manufacturing the same |
US11/187,794 US20050279429A1 (en) | 2002-10-01 | 2005-07-25 | Aluminum alloy for casting-forging, aluminum casting-forging product and processes for production thereof |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/674,811 Division US20040151615A1 (en) | 2002-10-01 | 2003-10-01 | Cast aluminum alloy for forging, and aluminum cast-forged product and method of manufacturing the same |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050279429A1 true US20050279429A1 (en) | 2005-12-22 |
Family
ID=32063674
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/674,811 Abandoned US20040151615A1 (en) | 2002-10-01 | 2003-10-01 | Cast aluminum alloy for forging, and aluminum cast-forged product and method of manufacturing the same |
US11/187,794 Abandoned US20050279429A1 (en) | 2002-10-01 | 2005-07-25 | Aluminum alloy for casting-forging, aluminum casting-forging product and processes for production thereof |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/674,811 Abandoned US20040151615A1 (en) | 2002-10-01 | 2003-10-01 | Cast aluminum alloy for forging, and aluminum cast-forged product and method of manufacturing the same |
Country Status (7)
Country | Link |
---|---|
US (2) | US20040151615A1 (en) |
EP (1) | EP1566458A4 (en) |
JP (1) | JPWO2004031424A1 (en) |
CN (1) | CN1497052A (en) |
AU (1) | AU2003268697A1 (en) |
PL (1) | PL374938A1 (en) |
WO (1) | WO2004031424A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090162689A1 (en) * | 2007-12-19 | 2009-06-25 | Honda Motor Co., Ltd. | Aluminum base part and manufacturing method |
DE102008008326A1 (en) * | 2008-02-07 | 2011-03-03 | Audi Ag | aluminum alloy |
CN103834836A (en) * | 2012-11-23 | 2014-06-04 | 深圳市欣茂鑫精密五金制品有限公司 | Die-casting forging aluminum alloy and production method thereof |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060000094A1 (en) * | 2004-07-01 | 2006-01-05 | Garesche Carl E | Forged aluminum vehicle wheel and associated method of manufacture and alloy |
CN100355527C (en) * | 2005-05-20 | 2007-12-19 | 东北轻合金有限责任公司 | Method for fabricating propeller blade made from aluminium alloy |
DE502006000145D1 (en) * | 2005-08-22 | 2007-11-29 | Rheinfelden Aluminium Gmbh | Heat-resistant aluminum alloy |
WO2009006939A1 (en) | 2007-07-09 | 2009-01-15 | Bharat Forge Aluminiumtechnik Gmbh & Co. Kg | Casting-forging of wrought alloys |
JP5416624B2 (en) * | 2010-03-15 | 2014-02-12 | 株式会社神戸製鋼所 | Automotive undercarriage parts and manufacturing method thereof |
KR101211988B1 (en) | 2012-05-25 | 2012-12-13 | 이상순 | A hot forging method for gas burner head of aluminium |
CN103031470B (en) * | 2012-12-13 | 2014-01-15 | 湖南晟通科技集团有限公司 | Aluminum alloy and casting method thereof, and method for extruding profile |
CN103484734A (en) * | 2013-08-12 | 2014-01-01 | 安徽环宇铝业有限公司 | High-elongation-percentage aluminum alloy section and manufacturing method thereof |
CN103898383B (en) * | 2014-03-26 | 2016-05-18 | 安徽家园铝业有限公司 | A kind of aluminum alloy with high thermal conductivity section bar and preparation method thereof |
CN103898374B (en) * | 2014-03-26 | 2016-08-24 | 安徽家园铝业有限公司 | A kind of aluminium alloy extrusions for building and preparation method thereof |
FR3032204B1 (en) * | 2015-01-29 | 2019-08-09 | Saint Jean Industries | ALUMINUM LOW SILICON ALLOY PIECE |
CN105436369B (en) * | 2015-11-13 | 2020-05-12 | 新荣株式会社 | Method and device for producing a cylinder for a motor vehicle clutch by means of a casting and forging process |
CN105483470A (en) * | 2015-12-15 | 2016-04-13 | 天津立中车轮有限公司 | High-strength aluminum alloy wheel |
CN105734366A (en) * | 2016-04-27 | 2016-07-06 | 谭钰良 | Aluminum foil material for automobile radiator |
CN106435299B (en) * | 2016-09-30 | 2018-04-13 | 华南理工大学 | A kind of SiC particulate reinforced aluminum matrix composites and preparation method thereof |
CN107541623A (en) * | 2017-08-30 | 2018-01-05 | 宁波华源精特金属制品有限公司 | A kind of sway bar |
CN107598065A (en) * | 2017-10-23 | 2018-01-19 | 徐州市博威机械制造有限公司 | A kind of forging technology of motor body |
CN107955893B (en) * | 2017-12-01 | 2020-08-21 | 宁波拓普汽车电子有限公司 | Forging forming method of aluminum alloy steering knuckle |
US11021187B2 (en) * | 2017-12-08 | 2021-06-01 | ILJIN USA Corporation | Steering knuckle and method of making the same |
KR102417740B1 (en) * | 2018-01-12 | 2022-07-08 | 애큐라이드코포레이션 | Aluminum alloys and manufacturing methods for applications such as wheels |
JP6887460B2 (en) * | 2019-04-10 | 2021-06-16 | 株式会社リケン | Vehicle knuckle |
JP2022137762A (en) * | 2021-03-09 | 2022-09-22 | トヨタ自動車株式会社 | Manufacturing method of aluminum alloy forging material |
CN114033591A (en) * | 2021-11-16 | 2022-02-11 | 苏州星波动力科技有限公司 | Aluminum alloy oil rail, forming method and manufacturing method thereof, engine and automobile |
CN115194083A (en) * | 2022-06-29 | 2022-10-18 | 中国第一汽车股份有限公司 | Production method of aluminum alloy rear steering knuckle of casting and forging combined passenger car |
CN115229162A (en) * | 2022-07-20 | 2022-10-25 | 山东昊方联合铸造有限公司 | Liquid-state squeeze forging and die casting process of aluminum alloy brake disc cap |
CN115283593B (en) * | 2022-08-18 | 2024-06-25 | 重庆新钰立金属科技有限公司 | Forming method of aluminum forging of generator oil tank frame |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4082578A (en) * | 1976-08-05 | 1978-04-04 | Aluminum Company Of America | Aluminum structural members for vehicles |
US4525326A (en) * | 1982-09-13 | 1985-06-25 | Swiss Aluminium Ltd. | Aluminum alloy |
US5240519A (en) * | 1991-08-28 | 1993-08-31 | Nippon Light Metal Company, Ltd. | Aluminum based Mg-Si-Cu-Mn alloy having high strength and superior elongation |
US6630037B1 (en) * | 1998-08-25 | 2003-10-07 | Kobe Steel, Ltd. | High strength aluminum alloy forgings |
US6678574B2 (en) * | 2000-10-11 | 2004-01-13 | Kobe Steel, Ltd. | Method for producing suspension parts of aluminum alloy |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63230844A (en) * | 1987-03-20 | 1988-09-27 | Showa Alum Corp | Aluminum alloy for rim for motorcycle or the like |
JPH086161B2 (en) * | 1988-03-07 | 1996-01-24 | 日本軽金属株式会社 | Manufacturing method of high strength A1-Mg-Si alloy member |
JPH07258784A (en) * | 1994-03-23 | 1995-10-09 | Kobe Steel Ltd | Production of aluminum alloy material for forging excellent in castability and high strength aluminum alloy forging |
JP3471421B2 (en) * | 1994-04-25 | 2003-12-02 | 日本軽金属株式会社 | Manufacturing method of aluminum alloy forging |
JPH0978210A (en) * | 1995-09-07 | 1997-03-25 | Mitsubishi Materials Corp | Production of vehicle wheel made of aluminum alloy and vehicle wheel |
JPH1112675A (en) * | 1997-06-28 | 1999-01-19 | Kobe Steel Ltd | Production of aluminum alloy for hot forging and hot forged product |
JP2002302728A (en) * | 2001-04-09 | 2002-10-18 | Hoei Kogyo Kk | Aluminum alloy for casting and forging, aluminum cast and forged article, and production method therefor |
JP4774630B2 (en) * | 2001-05-18 | 2011-09-14 | 日産自動車株式会社 | Manufacturing method of aluminum forged parts |
-
2003
- 2003-09-30 WO PCT/JP2003/012514 patent/WO2004031424A1/en not_active Application Discontinuation
- 2003-09-30 AU AU2003268697A patent/AU2003268697A1/en not_active Abandoned
- 2003-09-30 PL PL03374938A patent/PL374938A1/en not_active Application Discontinuation
- 2003-09-30 EP EP03748621A patent/EP1566458A4/en not_active Withdrawn
- 2003-09-30 CN CNA031349463A patent/CN1497052A/en active Pending
- 2003-09-30 JP JP2004541254A patent/JPWO2004031424A1/en active Pending
- 2003-10-01 US US10/674,811 patent/US20040151615A1/en not_active Abandoned
-
2005
- 2005-07-25 US US11/187,794 patent/US20050279429A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4082578A (en) * | 1976-08-05 | 1978-04-04 | Aluminum Company Of America | Aluminum structural members for vehicles |
US4525326A (en) * | 1982-09-13 | 1985-06-25 | Swiss Aluminium Ltd. | Aluminum alloy |
US5240519A (en) * | 1991-08-28 | 1993-08-31 | Nippon Light Metal Company, Ltd. | Aluminum based Mg-Si-Cu-Mn alloy having high strength and superior elongation |
US6630037B1 (en) * | 1998-08-25 | 2003-10-07 | Kobe Steel, Ltd. | High strength aluminum alloy forgings |
US6678574B2 (en) * | 2000-10-11 | 2004-01-13 | Kobe Steel, Ltd. | Method for producing suspension parts of aluminum alloy |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090162689A1 (en) * | 2007-12-19 | 2009-06-25 | Honda Motor Co., Ltd. | Aluminum base part and manufacturing method |
US8484825B2 (en) | 2007-12-19 | 2013-07-16 | Honda Motor Co., Ltd. | Method of producing an aluminum base part |
DE102008008326A1 (en) * | 2008-02-07 | 2011-03-03 | Audi Ag | aluminum alloy |
CN103834836A (en) * | 2012-11-23 | 2014-06-04 | 深圳市欣茂鑫精密五金制品有限公司 | Die-casting forging aluminum alloy and production method thereof |
Also Published As
Publication number | Publication date |
---|---|
PL374938A1 (en) | 2005-11-14 |
AU2003268697A8 (en) | 2004-04-23 |
AU2003268697A1 (en) | 2004-04-23 |
CN1497052A (en) | 2004-05-19 |
WO2004031424A1 (en) | 2004-04-15 |
EP1566458A4 (en) | 2006-04-26 |
US20040151615A1 (en) | 2004-08-05 |
EP1566458A1 (en) | 2005-08-24 |
JPWO2004031424A1 (en) | 2006-02-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20050279429A1 (en) | Aluminum alloy for casting-forging, aluminum casting-forging product and processes for production thereof | |
US20030010412A1 (en) | Aluminum alloy for casting-forge, and aluminum casting forged product and manufacturing method therefor | |
JP5894289B2 (en) | Die-cast products and vehicle parts | |
US20100326619A1 (en) | Aluminum alloy for vehicle cylinder liner and method of manufacturing vehicle cylinder liner using the same | |
JPH06172949A (en) | Member made of magnesium alloy and its production | |
US10260136B2 (en) | Aluminum alloy for die casting and method of heat treating the same | |
JPH09249951A (en) | Production of aluminum forged product having fine structure | |
CN108796317A (en) | Suitable for new-energy automobile can semi-solid squeeze casting aluminium alloy and preparation method | |
CN106319305A (en) | Liquid forging technology method for 6061 material commercial vehicle aluminum alloy shaft head | |
JP4801386B2 (en) | Aluminum alloy plastic processed product, manufacturing method thereof, automotive parts, aging furnace, and aluminum alloy plastic processed product manufacturing system | |
US20220017997A1 (en) | Aluminum alloys for structural high pressure vacuum die casting applications | |
KR101258801B1 (en) | Manufacturing method of aluminum bearing insert for lower crank case of engine | |
DE102011118014A1 (en) | Manufacturing body component semi-finished product, comprises presorting secondary aluminum to a composition suitable for a forgeable alloy, and melting the presorted secondary aluminum to obtain a secondary aluminum forgeable alloy | |
KR100703130B1 (en) | Non heat treatable high ductility aluminum cast alloys and manufacturing method thereof | |
JPH07197165A (en) | High wear resistant free cutting aluminum alloy and its production | |
JP2001162318A (en) | Aluminum alloy for forming to automotive member, method for producing same alloy material and automotive member for forming | |
JPH07150312A (en) | Manufacture of aluminum alloy forged base stock | |
JPWO2011052708A1 (en) | Manufacturing method of engine piston profile | |
JP5588884B2 (en) | Magnesium alloy forged piston manufacturing method and magnesium alloy forged piston | |
JPH06330264A (en) | Production of aluminum alloy forged material excellent in strength and toughness | |
JP3747232B2 (en) | Manufacturing method of aluminum casting forgings | |
CN106345984A (en) | Liquid forging technique of A357 aluminum alloy applied to wheel hub of commercial vehicle | |
EP1400292A1 (en) | Aluminum cast-forged product and method for manufacturing aluminum cast-forged product | |
CN106399770B (en) | Liquid forging process method applied to the A357 aluminium alloys of commercial axle head | |
KR20070038185A (en) | Heat treatment method of aluminum alloy parts using thixocasting method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |