EP3162460A1 - Pièce coulée en alliage léger et procédé de sa fabrication - Google Patents

Pièce coulée en alliage léger et procédé de sa fabrication Download PDF

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Publication number
EP3162460A1
EP3162460A1 EP15192538.5A EP15192538A EP3162460A1 EP 3162460 A1 EP3162460 A1 EP 3162460A1 EP 15192538 A EP15192538 A EP 15192538A EP 3162460 A1 EP3162460 A1 EP 3162460A1
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EP
European Patent Office
Prior art keywords
light metal
casting
alloy
metal cast
aluminum
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.)
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Application number
EP15192538.5A
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German (de)
English (en)
Inventor
Josef Gartner
Werner Hubauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mubea Performance Wheels GmbH
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Mubea Performance Wheels GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mubea Performance Wheels GmbH filed Critical Mubea Performance Wheels GmbH
Priority to EP15192538.5A priority Critical patent/EP3162460A1/fr
Priority to JP2018522678A priority patent/JP6824264B2/ja
Priority to EP16788143.2A priority patent/EP3370900B1/fr
Priority to BR112018008345A priority patent/BR112018008345A2/pt
Priority to AU2016351164A priority patent/AU2016351164A1/en
Priority to PL16788143.2T priority patent/PL3370900T3/pl
Priority to PCT/EP2016/076218 priority patent/WO2017076801A1/fr
Priority to MX2018005246A priority patent/MX2018005246A/es
Priority to US15/770,325 priority patent/US10801089B2/en
Priority to CN201680063378.3A priority patent/CN108290210B/zh
Priority to KR1020187012329A priority patent/KR102196323B1/ko
Publication of EP3162460A1 publication Critical patent/EP3162460A1/fr
Withdrawn legal-status Critical Current

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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/02—Pressure casting making use of mechanical pressure devices, e.g. cast-forging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D18/00—Pressure casting; Vacuum casting
    • B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
    • 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
    • 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

Definitions

  • the invention relates to a light metal casting component, in particular for a motor vehicle, which is produced from a hypoeutectic aluminum casting alloy.
  • the invention further relates to a method for producing such a light metal casting component.
  • Forged alloy wheels have exceptional strength that allows for a slimmer and lighter construction than comparable steel wheels. Due to the high strengths also relatively thin walls and spokes can be constructed, resulting in a low weight.
  • the preparation is usually done by gravity casting of a wrought alloy.
  • the mold is usually flat and corresponds only in diameter approximately to the final product. After casting, the blank is pressed at about 500 ° C gradually with up to two thousand tons of pressure in a mold. This completes the actual rim bowl. Subsequently the rim base is made by rolling and there is a machining. Forged wheels are alloyed much more with strength-enhancing alloying elements such as magnesium, silicon and titanium compared to cast wheels.
  • the shape of the mold is designed close to the final shape of the component to be produced.
  • the casting can be done in low pressure casting with about 1 bar from bottom to top.
  • a die casting method can be used in which the liquid melt is pressed under high pressure of about 10 to 200 MPa in a preheated mold, where it then solidifies. The melt displaces the air present in the mold and is kept under pressure during the solidification process.
  • Cast wheels usually have only a very small proportion of foreign metals such as titanium compared to forged wheels.
  • the casting properties of metal alloys and the mechanical properties of the finished component essentially depend on the particle size.
  • Grain-refining melt treatment can improve the static and dynamic strength values in castings, and the ability of the melt to flow in the mold and its fluidity.
  • the solidification of many metallic alloys begins with the formation of crystals that grow from seed sites on all sides until they abut the adjacent grain or wall.
  • the size of the grains For a high strength of the component to be produced, it is desirable to set the size of the grains as uniformly as possible or as finely as possible. For this purpose, a so-called grain refinement is often carried out, wherein the solidifying melt as many nucleating agents (foreign nuclei) are offered.
  • an automotive aluminum safety component made of an aluminum-silicon die-cast alloy is known.
  • the die cast alloy comprises 1.0 to 5.0 weight percent silicon, 0.05 to 1.2 weight percent chromium and balance aluminum and unavoidable impurities on.
  • the chrome is to achieve improved castability and formability.
  • the die cast alloy may further comprise titanium at a level of 0.01 to 0.15 weight percent, with titanium acting as a grain refiner, particularly when used with boron.
  • a hypoeutectic aluminum-silicon casting alloy containing a master alloy as a grain refining agent is known.
  • the cast alloy includes a silicon content of 5 to 13 weight percent and may further include magnesium at a level of 0.05 to 0.6 weight percent.
  • the master alloy contains 1.0 to 2.0 percent by weight of titanium and 1.0 to 2.0 percent by weight of boron.
  • the aluminum-silicon casting alloy is used to make automobile wheel rims by low pressure die casting. The addition of the master alloy takes place, in relation to the total amount of the melt, in an amount of 0.05 to 0.5 percent by weight.
  • a method of grain refining aluminum and aluminum alloys is known in which a solid silicon boron alloy is added to molten aluminum or molten aluminum alloy.
  • the resulting melt contains about 9.6 weight percent silicon and at least 50 ppm boron.
  • the melt-fabricated component has grain sizes in the range of 300 micrometers.
  • a method of manufacturing a metallic component by means of a casting and molding tool comprising the steps of: pouring a melt into the casting and molding tool at a first pressure, pressurizing the solidifying melt in the tool with a larger second pressure, and compacting the from the melt solidified component in the tool with a larger third pressure.
  • the present invention has for its object to provide a light metal casting with a fine-grained structure, which has good strength properties and is easy to produce.
  • the object is also to propose a corresponding method for producing such achtmetallgussbauteils.
  • One solution is a light metal cast component made from a hypoeutectic cast aluminum alloy, wherein the light metal cast component contains 3.5 to 5.0 weight percent silicon and 0.2 to 0.7 weight percent magnesium, and wherein the light metal cast component has a mean grain size of maximum 500 microns.
  • An advantage of the light metal casting component is that it can be produced by means of low-pressure casting due to the relatively low silicon content and, due to the fine-grained microstructure, has good mechanical properties, in particular with regard to strength, ductility, elongation at break and porosity.
  • the tensile strength (Rm) of the light metal cast component is preferably at least 270 N / mm 2 , in particular at least 300 N / mm 2 , or at least 320 N / mm 2 .
  • the light metal cast component produced therefrom has a high ductility and elongation at break.
  • the elongation at break (A5) of the light metal cast component is at least 5%, in particular at least 8%.
  • the breaking elongation can be below the breaking elongation usual for a forging part, in particular below 12%.
  • the light metal cast component preferably has a yield strength (Rp0.2) of at least 220 N / mm 2 , in particular of at least 250 N / mm 2 , or of at least 280 N / mm 2 .
  • the Weinmetallgussbauteil has a maximum porosity of less than 0.5%, in particular less than 0.1%.
  • the low porosity also contributes to good strength properties and toughness.
  • the light metal cast component may have a surface roughness of less than 50 microns, more preferably less than 20 microns.
  • the low surface roughness of less than 50 micrometers contributes to particularly good mechanical characteristics of the surface quality of the component.
  • the light metal cast component in a raw cast surface area has a yield strength (Rp0.2) of at least 280 N / mm 2 , an elongation at break (A5) of at least 8% and a tensile strength (Rm) of at least 320 N / mm 2 .
  • a raw casting surface area means an area of the raw casting component unprocessed after casting with a depth of up to 1.0 mm from the component surface.
  • Main alloying elements of the casting alloy used for the production of the light metal casting component are aluminum and silicon.
  • the casting alloy can also be referred to as aluminum-silicon casting alloy.
  • the cast alloy can also contain further alloying elements or unavoidable impurities.
  • the proportion of further alloying elements and unavoidable impurities is less than 1.5 percent by weight based on the total weight of the light metal cast component, preferably less than 1.0 percent by weight.
  • the aluminum-silicon casting alloy in particular at least 93 weight percent, preferably at least 95 weight percent aluminum.
  • the light metal cast component In principle, it is desirable for the light metal cast component to be produced to have good mechanical properties, in particular high strength. On the other hand, strength-enhancing alloying elements can lead to an increased tendency to corrosion, which in turn is undesirable.
  • the proportion of strength-increasing alloying elements is as low as possible, so that the light metal casting component has a high corrosion resistance.
  • the corrosion resistance should be so high that the relevant corrosion tests for the respective Textilmetallgussbauteil be met. Standardized corrosion tests are described, for example, in EN ISO 9227 or ASTM B117.
  • corrosion tests that relate to the external stress of motor vehicles such as the CASS test (accelerated copper salt spray test) or the Filiform test for vehicle wheels, should also be fulfilled.
  • the CASS test is carried out especially on coated or painted components.
  • the components to be tested in a chest-like system are permanently exposed to different, highly corrosive salt mists.
  • the examination of filiform corrosion can be carried out, for example, in accordance with DIN EN 3665 or a comparable standard.
  • the subcritical amount of strength-enhancing alloying elements depends on the respective alloy composition and the corrosion test used, and therefore can not be stated in an absolute or concrete way. Therefore, by way of example only, the amount of strength enhancing alloying elements such as copper (Cu), zinc (Zn) and titanium (Ti) may be less than one weight percent of the total weight of the component.
  • the aluminum casting alloy may include copper (Cu) with a maximum content of 550 ppm (parts per million). It can also be provided that the casting alloy or the component produced therefrom contains less than 250 ppm or no copper at all.
  • the aluminum casting alloy may include zinc (Zn) with a maximum content of 550 ppm (parts per million). It can also be provided that the casting alloy or the component produced therefrom contains less than 250 ppm or no zinc at all.
  • the aluminum casting alloy may comprise titanium (Ti) having a maximum content of 0.12 weight percent.
  • Ti titanium
  • the aluminum casting alloy boron (B) having a maximum content of 0.12 weight percent, in particular of at most 0.06 weight percent. If titanium is present, the proportion of boron may be below the proportion of titanium.
  • the titanium and the boron can be provided according to an embodiment in the form of titanium boride in the aluminum casting alloy or in the component produced therefrom.
  • the aluminum casting alloy may have titanium boride (TiBor) in a proportion of less than 30 ppm.
  • the aluminum casting alloy may include strontium (Sr) at a level of from 100 ppm to 150 ppm.
  • the aluminum casting alloy may include tin (Sn) at a level of less than 250 ppm.
  • the aluminum casting alloy may comprise nickel (Ni) in a proportion of less than 550 ppm.
  • the aluminum casting alloy may include manganese (Mn) at less than 0.5 weight percent.
  • the aluminum casting alloy may comprise chromium (Cr) in a proportion of less than 500 ppm, preferably less than 200 ppm. This includes in particular the possibility that no chromium in the Aluminum casting alloy or in the component produced therefrom is included. Incidentally, this also applies to the other alloying elements mentioned above.
  • the rest of the aluminum casting alloy consists of aluminum, silicon, magnesium and unavoidable impurities.
  • the light metal cast components according to the invention have a greater design freedom than conventional light metal cast components and forged light metal components. Thus, smaller cross-sections of the components can be realized, or a complex Umformtechnische post-processing can be omitted.
  • the light metal casting component may have, in the finished manufactured state, subsections which are mechanically unworked, in particular mechanically unconsolidated after casting.
  • the mechanically unprocessed sections may have a wall thickness of less than 3.0 millimeters, at least in some areas.
  • the light metal casting component may be a safety or structural component, in particular a vehicle wheel or a vehicle rim for a motor vehicle or the like. It is understood that the light metal cast component can also be designed in other form or for other applications than motor vehicles, for example for the construction industry.
  • the security or structural member has a weight of at least 500 grams, more preferably at least 3000 grams.
  • the solution of the above object is further in a method for producing a light metal casting component comprising the steps of providing a melt of an aluminum casting alloy, which - in addition to aluminum - at least silicon with 3.5 to 5.0 weight percent and magnesium with 0.2 contains up to 0.7% by weight and unavoidable impurities; Pouring the melt into a casting mold with a low first pressure (P1); after complete filling of the casting and molding tool, pressurizing the solidifying melt in the casting and molding tool with a second pressure (P2) greater than the first pressure (P1); and when the melt is at least largely solidified to the component, compressing the at least largely solidified from the melt component in the casting and molding tool at a third pressure (P3), which is greater than the second pressure (P2).
  • P1 low first pressure
  • P2 second pressure
  • P3 third pressure
  • An advantage of the casting method described is that hereby components with particularly high strength and a particularly fine microstructure can be produced in a short time.
  • the method can be used to produce light metal cast components having an average particle size of less than 500 micrometers, in particular from 200 to 500 micrometers.
  • the advantages of the method and the advantages of the component produced according to the method interlock here.
  • all the features and benefits referred to in the context of the product also apply to the procedure, and vice versa.
  • Another advantage of the method is that the components produced by the compression have a near-net shape, resulting in excellent material utilization. Furthermore, the products produced by said method have a high dimensional accuracy and surface quality. The tooling costs are low, since a process tool is used to carry out different process steps. The method is particularly suitable for the production of wheel rims for motor vehicles, the production of other components is of course not excluded.
  • the casting of the melt takes place at a temperature significantly above the liquidus temperature, in particular at a casting temperature which is at least 10% above the liquidus temperature.
  • the cast aluminum alloy melt may be cast at a temperature of 620 ° C to 800 ° C, especially at a temperature of 650 ° C to 780 ° C.
  • the casting tool which is also referred to as a casting mold or mold, may have a low temperature of, for example, less than 300 ° C.
  • the pressure required to pour the melt into the casting mold depends on the casting process, such as gravity casting or low pressure casting.
  • the first pressure may be the ambient pressure, that is about 0.1 MPa (1 bar).
  • the first pressure when using low pressure casting is correspondingly so high that the melt can rise through the riser into the mold cavity of the casting tool.
  • the pressure during low-pressure casting may be between 0.3 MPa and 0.8 MPa (corresponding to 3 to 8 bar).
  • the first pressure is at most as large as needed for low pressure casting and should preferably be less than 1 MPa.
  • the pressurization provided after the filling of the casting tool is carried out at a higher second pressure, which may be, for example, greater than 5 MPa (50 bar), in particular more than 9 MPa (90 bar).
  • the pressurization with the second pressure begins after the mold is completely filled with melt, in particular while the melt initially solidifies to the component or when the melt passes into the semi-solid state starting.
  • the completely filled state of the casting mold can be sensed in the low-pressure process, for example by a pressure surge at the filling piston.
  • the pressurization of the solidifying melt can take place, for example, at a component edge shell temperature below the liquidus line and / or above the solidus line of the light metal alloy. However, it is also conceivable that the process begins even before reaching the liquidus line, for example at 3% above the liquidus line.
  • Under component edge shell temperature is understood in this context, a temperature which has the component in an edge layer region, or a solidifying or solidified from the melt edge shell. The solidification occurs from outside to inside, so that the temperature of the solidifying component inside are higher than in the peripheral view.
  • the pressurization is carried out at a second pressure which is greater than the first pressure and can be exerted on the melt by the weight of the upper part, for example.
  • an even higher third pressure is built up and applied to the workpiece, which may preferably be more than 15 MPa (150 bar).
  • the compression is preferably carried out at a component edge shell temperature which is lower than the second temperature of the partially or largely solidified light metal alloy.
  • a lower limit of the third temperature for carrying out the compression is preferably at half the solidus temperature of the metal alloy. Subareas of the component may also be outside the temperature.
  • the temperature of the component or of the tool lower part and / or upper part can be monitored by means of corresponding temperature sensors.
  • the end of the forming process can be defined by reaching an end position of the relative movement upper part to lower part or reaching a certain temperature.
  • the melt can be prepared from a base melt containing at least aluminum, and grain refining agents.
  • the grain refining agents act as nucleating agents in crystallizing the molten metal melt. These nucleating agents have a higher melting point than the light metal melt to be cast off and therefore solidify first during cooling. The crystals formed from the melt easily accumulate on the grain refining agents. As many crystals as possible form, which then hinder their growth, resulting in a fine uniform structure.
  • the grain refining agents may comprise an aluminum-silicon alloy grain refiner containing a maximum of 12.5 weight percent silicon and / or an aluminum-titanium alloy grain refiner containing at least titanium and boron as alloying elements.
  • the two grain refiners are composed of different alloys.
  • a particularly good grain refining effect is achieved when both the first grain refiner with up to 12.5 weight percent silicon and the second grain refiner with titanium and boron are used. This leads to a significant improvement in the castability and the strength of the component produced therefrom.
  • the melt taken in relation to the total weight of the castable melt or of the component produced therefrom, taken together may contain an amount of 0.1 to 5.0 weight percent of the grain refiner of the aluminum-silicon alloy and the grain refiner of the aluminum-titanium alloy.
  • alloying elements such as silicon, titanium, boron or others are mentioned, it should be understood in the context of the present disclosure that not only the pure alloying elements can be used, but also compounds are included, which include the respective alloying elements.
  • the specified proportion of silicon of not more than 12.5 percent by weight refers to the total weight of the first grain refiner.
  • FIG. 1 shows a method for producing a light metal casting component by means of a casting and molding tool in several process steps S10 to S50.
  • the material used is a light metal casting alloy containing at least the following alloy constituents: 3.5 to 5.0% by weight of silicon, 0.2 to 0.7% by weight of magnesium, at least 93.0% by weight of aluminum and unavoidable impurities.
  • the alloy may also contain titanium and boron in minor amounts, as well as traces of other elements such as copper, manganese, nickel, zinc, tin, and / or strontium.
  • an exemplary alloy may include 4.0 weight percent silicon, 0.4 weight percent magnesium, 0.08 weight percent titanium, 0.06 weight percent boron, about 400 ppm copper (Cu), about 400 ppm zinc (Zn), about 100 ppm strontium ( Sr), about 200 ppm tin (Sn), about 400 ppm nickel (Ni), about 400 ppm manganese (Mn), optionally about 20 ppm titanium boride unavoidable impurities and the remainder aluminum (Al).
  • the melt is produced for producing the light metal cast component.
  • a base melt is made from a base alloy.
  • at least one grain finer can be introduced, which acts as a nucleating agent during crystallization.
  • a first grain refiner made from an aluminum-silicon alloy containing a maximum silicon content of 12.5 percent by weight based on the total weight of the first grain refining alloy can be used.
  • a second grain refiner of an aluminum-titanium alloy may be used, which contains aluminum as the main component and at least titanium and boron as additional alloying elements.
  • the grain finers are introduced into the melt of the base alloy, whereby the grain finer are melted.
  • the melt of the light metal casting alloy is poured into a casting and molding tool at a low first pressure (P1).
  • Casting may be by gravity casting or low pressure casting, with the first pressure (P1) preferably being below 1.0 MPa.
  • the melt is poured at a temperature (T1) above the liquidus temperature, in particular at a temperature of 650 ° C to 780 ° C.
  • the casting tool which is also referred to as a casting mold or mold, may have a low temperature of, for example, less than 300 ° C.
  • the light metal alloy located in the mold cavity is pressurized.
  • a pressure P2 which is greater than 5 MPa (50 bar) is established between a lower part and an upper part of the casting tool. This pressure can be generated for example by the weight of the upper part.
  • the pressurization of the melt can take place in a component edge shell temperature range T2 from around the liquidus line TL to above the solidus line TS of the metal alloy, that is TS ⁇ T2 ⁇ TL.
  • the material is still liquid.
  • the material is at least partially solidified, that is, it is in a semi-solid state.
  • a compression of the workpiece which is at least largely solidified from the melt takes place.
  • the compression is performed by relatively moving the base to the top at a third pressure P3 that is greater than the second pressure P2 in step S30.
  • the compression can be done by pressing the lower part in the direction of the upper part with high forces.
  • the compression preferably begins only when the metal alloy is at least largely solidified or in the semi-solid state.
  • the compaction can be carried out at a component edge shell temperature T3, which is lower than the temperature T2 of the metal alloy in the step pressurizing S30.
  • the lower limit of the temperature T3 is half of the solidus temperature TS of the metal alloy, that is T2> T3> 0.5TS.
  • the end of the forming process is defined by reaching an end position of the relative movement of the upper part to the lower part and the achievement of a certain temperature.
  • the mechanical Reprocessing can be, for example, a machining operation, such as a turning or milling machining, or a reshaping machining, such as ironing.
  • cast blanks can be produced in several stages in the same lower mold, by casting (S20), subsequent pressurization (S30) and subsequent compacting / reshaping (S40).
  • the pressurization takes place above the solidus temperature (liquid to semi-solid state) of the alloy used in each case.
  • FIG. 2 shows a state diagram (phase diagram) for a light metal alloy for producing a component according to the inventive method.
  • the X-axis indicates the content ratio of a metal alloy (W L ) comprising X A % of a metal A and X B % of a metal B.
  • the metal A is aluminum and the metal B is silicon. Due to the stated proportions of aluminum and silicon, the light metal alloy formed out hypoeutectic, that is, the proportion of silicon (metal B) in relation to aluminum (metal A) in the light metal alloy (W L ) so low that a microstructure on the left of the eutectic (W Eu ) arises.
  • the temperature (T) is indicated on the Y axis.
  • the casting takes place at a temperature T1 significantly above the liquidus temperature TL or the liquidus line LL.
  • the temperature range T1 is shown in phantom.
  • the temperature range T2 for pressurizing which is preferably below the liquidus temperature (TL) and above the solidus temperature TS (TL>T2> TS), is in FIG. 2 shown with hatching from bottom left to top right.
  • the compression (S30) takes place in particular in a temperature range T3 between the temperature T2 and the half solidus temperature 0.5TS (T2>T3> 0.5 TS). This area is in FIG. 2 hatched from upper left to lower right.
  • a mechanical reworking takes place at a temperature T4 below the solidus temperature (T4 ⁇ TS).
  • the light metal cast component produced by the above method has a particularly fine-grained structure with a low porosity and good mechanical properties, in particular with regard to the strength, ductility and elongation at break.
  • the light metal cast component has a maximum porosity of less than 0.5%, in particular less than 0.1%, and a surface roughness of less than 50 micrometers, in particular less than 20 micrometers.
  • the tensile strength (Rm) of the light metal cast component is at least 270 N / mm 2 , in particular at least 320 N / mm 2 .
  • the elongation at break (A5) is at least 5%, in particular at least 8%.
  • the yield strength (Rp0.2) is at least 220 N / mm 2 , in particular at least 280 N / mm 2 .
  • the light metal cast component can be designed in the form of a safety or structural component for a motor vehicle, in particular as a vehicle wheel or a vehicle rim.
  • the process is particularly suitable for the production of safety or structural components having a weight of at least 500 grams, in particular of at least 3000 grams, without being limited thereto.
  • An advantage of the described method is that a component produced therewith has a particularly fine-grained, lunkerarmes structure. Overall, this leads to an increased strength of the component.
  • the tensile strength (Rm) of a component according to the invention could be increased by more than 20% over conventionally produced components.
  • the yield strength (Rp0.2) could even be increased by more than 40%.
  • a component with significantly higher strength can thus be produced with the same material use, or it can be made with less material use a lighter component.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
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  • Organic Chemistry (AREA)
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EP15192538.5A 2015-11-02 2015-11-02 Pièce coulée en alliage léger et procédé de sa fabrication Withdrawn EP3162460A1 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
EP15192538.5A EP3162460A1 (fr) 2015-11-02 2015-11-02 Pièce coulée en alliage léger et procédé de sa fabrication
JP2018522678A JP6824264B2 (ja) 2015-11-02 2016-10-31 軽金属鋳造部材の製造方法および軽金属鋳造部材
EP16788143.2A EP3370900B1 (fr) 2015-11-02 2016-10-31 Pièce coulée en alliage léger et procédé de sa fabrication
BR112018008345A BR112018008345A2 (pt) 2015-11-02 2016-10-31 método para produção de componente fundido de metal leve e componente fundido de metal leve
AU2016351164A AU2016351164A1 (en) 2015-11-02 2016-10-31 Method for producing a light metal cast component and light metal cast component
PL16788143.2T PL3370900T3 (pl) 2015-11-02 2016-10-31 Sposób wytwarzania elementu konstrukcyjnego odlanego z metalu lekkiego i element konstrukcyjny odlany z metalu lekkiego
PCT/EP2016/076218 WO2017076801A1 (fr) 2015-11-02 2016-10-31 Procédé de fabrication d'un élément en fonte de métal léger et élément en fonte de métal léger
MX2018005246A MX2018005246A (es) 2015-11-02 2016-10-31 Metodo para la fabricacion de componentes de metal ligero fundido y componente de metal ligero fundido.
US15/770,325 US10801089B2 (en) 2015-11-02 2016-10-31 Light metal cast component
CN201680063378.3A CN108290210B (zh) 2015-11-02 2016-10-31 用于制造轻金属铸造部件的方法和轻金属铸造部件
KR1020187012329A KR102196323B1 (ko) 2015-11-02 2016-10-31 경금속 주조 부품 생산 방법 및 경금속 주조 부품

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KR101978607B1 (ko) * 2018-10-04 2019-05-14 정희열 알루미늄 합금으로 구성되는 다이캐스팅 성형용 소재를 이용한 전기 및 전자 커넥터의 제조 방법
JP2022011149A (ja) * 2020-06-29 2022-01-17 ヤマハ発動機株式会社 車両ホイール用アルミニウム合金、車両ホイールおよび車両ホイールの製造方法
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WO2019086084A1 (fr) 2017-11-02 2019-05-09 Schuler Pressen Gmbh Dispositif de coulée et procédé pour la fabrication d'une jante en métal léger ainsi que jante en métal léger
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EP3725900A1 (fr) 2019-04-17 2020-10-21 Mubea Performance Wheels GmbH Composant, procédé et dispositif permettant de tremper un composant
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EP4101941A1 (fr) * 2021-06-07 2022-12-14 Dubai Aluminium PJSC Alliage de moulage aluminium-silicium et pièces moulées fabriquées à partir dudit alliage

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AU2016351164A1 (en) 2018-05-31
US20180305793A1 (en) 2018-10-25
KR102196323B1 (ko) 2020-12-30
US10801089B2 (en) 2020-10-13
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MX2018005246A (es) 2018-09-21
WO2017076801A1 (fr) 2017-05-11
PL3370900T3 (pl) 2023-08-28
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JP2019501777A (ja) 2019-01-24
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