ES2244838T3 - SINTERIZABLE DUST MIXTURE FOR THE PRODUCTION OF SINTERED COMPONENTS. - Google Patents

Abstract

The present invention relates to sinterable powder compositions, sintered components produced therefrom, and methods for prepared such components. Sinterable powder compositions are composed of an aluminum-based powder, and a first metal powder comprising molybdenum and/or tungsten. The aluminum based powder is composed of aluminum and magnesium, silicon, copper, zinc, titanium, tin, manganese, nickel, or combinations thereof. In another embodiment, the sinterable powder composition includes a second metal powder comprising copper, tin, zinc, lithium, magnesium, or combination thereof. The sinterable powder compositions may be used for the production of sintered components, including composite components, having not only sufficient strength values but also with high hardness.

Description

Mixing sinter powder for production of sintered components.

The present invention relates to a mixture of sinter powders for the production of sintered components, particularly for automobile construction, based of an Al powder, as well as sintered components produced at from said mixture and to a process to produce components of this type.

For its particular properties, aluminum it constitutes a preferred raw material, particularly in aerospace and automobile industries. The components produced from aluminum or raw materials containing aluminum are considerably lighter than the components usual, for example produced from cast iron. Thanks to the decrease in weight is achieved, for example in cars, an increase in performance, as well as a reduction in fuel consumption and an improvement in the gas values of escape.

As a consequence of the convenience of reducing the weight in cars, in the automotive sector there is a growing need for applications for aluminum. By For example, in the construction of engines and transmissions, replace piece by piece steel or cast iron parts used so far by other aluminum or manufactured with use of aluminum. Because the combination of pieces of steel or cast with other aluminum causes problems because of the different physical behavior of the materials, it results convenient to replace the maximum number of components "classics" of steel or cast iron by others produced with use of aluminum, as this avoids the problems due to the differences between the materials used in what refers to its thermal expansion coefficients, its conductivity thermal, its elastic properties, etc. In addition, through the use of components adjusted to each other, which have been made using aluminum, they are particularly higher yields

As particularly many engine components, of clutch and transmission are produced by powder metallurgy, there is a great interest in producing powder mixtures and providing procedures by which components of aluminum by powder metallurgy. In powder metallurgical production of components with aluminum use is particularly disadvantageous that aluminum and its alloys tend to be covered, in contact with the air, of an extremely metallic oxide stable. As a result, the increase in specific surface Because of the oxide layers present on the material with aluminum content used, it is difficult the diffusion, necessary for sintering, of the particles of powdery material used. In addition, the components produced from raw materials with aluminum content present, in comparison with those produced from steel or cast iron, about lower values of mechanical strength, and particularly a less hardness In addition, the oxide layers present on the matter premium with aluminum content make cold assembly difficult of the particles with each other during the usual procedure of compression.

Therefore, there is a need for mixtures of sintering powder that can be processed well by powder metallurgy and from which components can be produced with good values of mechanical resistance and high hardness. In addition, there is a need for powder metallurgical procedures for Processing of this type of sintered powder mixtures with aluminum content

Therefore, the objective of the present invention is to provide a mixture of powders and components produced from it, as well as the procedures corresponding, that do not suffer from the inconveniences previously mentioned.

This objective is achieved, according to the invention, by a mixture of sintered powders for the production of sintered components, particularly for construction automotive, which comprises between 60 and 98.5% by weight, referred to the total amount of powder mixture, and preferably between 75 and 92% by weight, of a powder based on Al constituted by metals and / or their alloys, which includes Al and, given the case, contents of at least one of the following metals: 0.2 to 30% by weight of Mg, 0.2 to 40% by weight of Si, 0.2 to 15% by weight of Cu, 0.2 to 15% by weight of Zn, 0.2 to 15% by weight of Ti, 0.2 to 10% by weight of Sn, 0.2 to 5% by weight of Mn, 0.2 to 10% by weight of Ni and / or less than 1% by weight of As, Sb, Co, Be, Pb and / or B, referring the respective percentages by weight to the total amount of powder a Al base; and from 0.8 to 40% by weight, based on the total amount of mixture of powders, and preferably 8 to 15% by weight, of a powder metallic selected from a first group of metals and / or their alloys consisting of Mo and / or W, as well as, where appropriate, of between a second group of metals and / or their alloys constituted by Cu, Sn, Zn, Li and / or Mg.

By adding the first group of metals and / or its alloys, consisting of Mo and / or W, with this mixture of powders can be produced powder metallurgical components that They have a very high hardness. The hardness values for components produced with a powder selected from the first group of metals and / or their alloys increase, compared to those produced without the addition of this first group of metals and / or its alloys, between 5 and 35%, preferably between 10 and 25% Thanks to the addition of the first group of metals and / or their Alloys to a powder based on Al, the cold assembly of the particles to each other caused by the compression procedure, and particularly by pressing. With this, finally, the dissemination of the individual particles during the individual procedure of sintering, whereby components with values of Higher mechanical strength and greater hardness.

Advantageously, the sintering powder mixture it also comprises the aforementioned second group of metals and / or their alloys consisting of Cu, Sn, Zn, Li and / or Mg. It is assumed that the addition of the second group mentioned above of metals and / or their alloys causes that, particularly already during the compression procedure, and particularly during the pressed one, is constituted with the aluminum-based powder a alloy and / or an intermetallic phase. In this way, the formation of oxide layers on the surface of the powder based on To used. Additionally, during the procedure itself of sintering, the second group of metals and / or their alloys passes, at least partially, to a state at least partially liquid at the sintering temperature, thereby the bonding of the first group of metals and / or is improved particularly its aluminum-based powder alloys.

Preferably, the ratio between the quantity of the first group of metals and / or their alloys and the amount of second group in the powder mixture is in a range between 1: 8 and 15: 1 parts by weight. Preferably, this ratio is in a range between 2: 1 and 6: 1 parts by weight. With these mixing relationships a union is achieved  maximum of metals and / or their alloys of the first group to dust based on Al. Thus, with the powder mixture they can Obtain components with a high hardness.

In another advantageous configuration of the invention, Al-based powder has, in addition to Al, 0.2 to 15% by weight Mg, 0.2 to 16% by weight Si, 0.2 to 10% by weight Cu and / or from 0.2 to 15% by weight of Zn, referred respectively to the amount total powder based on Al. Preferably, the second group of metals and / or their alloys also have Cu, Zn and / or Sn.

Preferably, the sintering powder mixture comprises lubricating agent in an amount between the 0.2 and 5% by weight, based on the total amount of the mixture of powder. As lubricants can be provided, on the one hand, some self-lubricating agents, such as MoS_ {2}, WS_ {2}, BN, MnS as well as graphite and / or other hydrocarbon modifications such as coke, polarized graphite or the like. Preferably, they are added 1 to 3% by weight of lubricating agent to the powder mixture sintered Thanks to the use of lubricating agents mentioned, self-lubricating properties can be conferred on components produced from the powder mixture sintered

The sinter powder mixture can also comprise binding agents and / or release agents. These will preferably selected from a group comprising the polyvinyl acetate, waxes, particularly amide waxes such as ethylenebisestearoylamide, shellac, polyalkylene oxides and / or polyglycols The polyalkylene oxides and / or the polyglycols are preferably used as polymers and / or copolymers with weights molecular molecules within a range between 100 and 500,000 g / mol, preferably between 1,000 and 3,500 g / mol, more preferably between 3,000 and 6,500 g / mol. The agents are preferably introduced in an amount within a range between approximately 0.01 and 12% by weight, preferably in a range between 0.5 and 5% by weight, and more preferably between 0.6 and 1.8% by weight, referred respectively to the total amount of powder mixture. The binder and / or release agents also facilitate the extraction of the component produced from the powder mixture Sintering of its pressing mold.

Powder mixing can be produced by mixing the individual components with the usual instruments, such as asymmetric motion mixers, both at elevated temperatures (hot mix) as at room temperature (cold mix), hot mixing being preferred.

In addition, the present invention relates to a sintered component produced according to the procedure according to the invention. This type of sintered components according to the invention have mechanical strength and hardness values significantly higher than those produced by procedures usual. Preferably, the sintered components according to the invention have a tensile strength of at least 140 N / mm2, measured according to DIN EN 10002-1 More preferably, resistance to tensile is greater than 200 N / mm2, and more preferably greater than 300 N / mm2. Advantageously, the sintered components according to The invention has an elastic modulus of at least 70 kN / mm2, measured according to DIN EN 10002-1, which is more preferably greater than 80 kN / mm 2.

In a more preferred embodiment of the invention, the sintered components according to the invention have a hardness (HB 2.5 / 62.5 kg) of at least 100, measured according to DIN EN 24498-1. More preferably, the hardness  is greater than 110, and even more preferably greater than 125.

In another advantageous configuration, the component Sintered according to the invention is shaped like a cogwheel, a pump wheel, particularly an oil pump wheel, and / or a connecting rod and / or a rotor set.

By sintered components in the sense of present invention are understood as fully produced components from a sinter material, although they are also understood components whose base body, for example, can be produced at from a mixture of powders containing aluminum, and the body which subsequently joins said base body can occur at from another material, for example iron or crucible steel, sintered or solid, or from solid cast aluminum. On the other hand, the component can present, for example, only on its front faces or on its surface, a sintered layer of a mixture of powders containing aluminum, being the body of base, for example, of steel or cast iron, sintered or solid. Sintered components can be calibrated and / or hot hardened.

Finally, the present invention relates to a procedure to produce sintered components, also parts composed, from a mixture of powders according to the invention, in the one who:

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in a first stage, the powder mixture is introduced in a first mold;

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in a second stage, the powder mixture is compressed until a compact in green;

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in a third stage, the green compact is reprinted at least partially; Y

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in a fourth stage, the pressed green compact is sintered.

The method according to the invention presents the great advantage that thanks to the high density, already obtained in the third stage, before the actual sintering stage components can be produced that have, on the one hand, excellent mechanical strength values and, on the other, densities and considerably high hardnesses. Particularly, thanks to reprimed according to the procedure according to the present invention the steps of usual processing after the sintering stage, such as calibration and / or hot temper hardening, or if necessary, the usual procedure of Post-burned or calibration procedure. Thanks to this shortening of the complete procedure you get an increase in productivity and, with it, an advantage from the economic point of view

Thanks to the reprinting of the third stage of process according to the invention, it is advantageously achieved that the oxide layers present on the surface of the material used are broken mechanically, which achieves a better cold assembly between individual material particles in the pressing procedure. In addition, this improves also diffusion between individual material particles during the actual sintering procedure. This form components with resistance values can be obtained high mechanics and, particularly, higher hardnesses.

The pressing procedure carried out in the second and third stages of the process according to the invention can be performed at elevated temperatures, particularly adding the agents mentioned above, particularly polyethylene glycols (hot pressed), but also to ambient temperature (cold pressed) and also by compaction by vibration In this case, by vibration compaction understands a procedure in which during the procedure of pressing overlaps, at least temporarily, a vibration, said vibration can start, for example, through, as minimum, a molding punch. It is also possible a combination of the pressing procedures above mentioned. Blends of sintered Al-based powders may also contain high melting point components, such as for example platinum or the like. The powder used and the Particle size depends on each application. In addition, the sinter material may be partially or totally constituted by short fibers or fibers, preferably fibers with diameters between about 0.1 and 250 µm and a length between a few \ mum and a few millimeters, up to about 50 mm, such as fiber wire cloth.

In case you want to produce components that, for example, present on the front face of a body constituted by steel or cast iron a sintered layer of the sinter material, in the first stage of the procedure according to the invention it is arranged, for example, by the methods usual, the sinter material on the base body, although it can also be provided, for example, to spray the material in powder form (Wet Powder Spraying: WPS). This results it is necessary to prepare a suspension of sinterizable material. The suspension necessary for this preferably comprises solvents, binding agents, stabilizers and / or agents dispersants Particularly preferred solvents are selected from the group consisting of water, methanol, ethanol, isopropanol, terpene, alkenes C 2 -C 5, toluol, trichlorethylene, diethyl ether and / or C 1 {C} {6} aldehydes and / or ketones. They are preferred vaporizable solvents at lower temperatures at 100 ° C. The amount of solvent used is in a range approximately between 40 and 70% by weight, based on the mixture of sinter powders used, and preferably in a range between 50 and 65% by weight.

Repressing carried out in the third stage (which can also be designated intermediate pressing) can be performed by known and usual procedures for pressing of a compact in green. So, for example, the green compact pressing in the second stage can be introduced again in a usual matrix mold and within it to be repressed, at least partially, with the corresponding molding punch. Preferably, the repress tools can be configured completely or partially conical, so that they can be achieved particularly high presses in certain areas of the Compact in green determined in advance.

In a preferred embodiment of the procedure according to the invention, before the third stage removes the wax from the compact in green at an additional stage. The Wax removal is preferably carried out under nitrogen, hydrogen, air and / or mixtures of the gases mentioned, and particularly also with a precise air supply. In addition, wax removal can be carried out with a gas endothermic and / or an exothermic gas, but also under vacuum. The Wax removal can preferably be carried out by microwave and / or ultrasound overlay, or only by microwave for temperature control. Finally the wax removal can also be carried out by solvents such as alcohol or the like, or by carbon dioxide supercritical with or without application of temperature, microwave or ultrasound, or by a combination of procedures mentioned.

Advantageously, with the procedure according to the invention, by repressing carried out in the third stage a density of approximately 2 to 40% is reached, preferably from 5 to 30%, and more preferably from 15 to 25%, higher than the density before pressing.

Preferably, in the second stage of the process according to the invention compact compresses in green up to an output density within a range between 2.1 and 2.5 g / cm3, preferably between 2.2 and 2.4 g / cm3, more preferably between 2.25 and 2.38 g / cm3, Measures according to DIN ISO 2738.

In another embodiment of the procedure according to the invention a mold is sprayed with a mold release agent before introducing in it the compact in green, of which optionally the wax has been removed. You can also impregnate the compact in green, from which the wax has been removed, with agent demoulding In addition, it is particularly advantageous that the sintering procedure is carried out in the fourth stage low nitrogen with a dew point below -40 ° C, and preferably below -50 ° C. In this case, sintering It takes place under pure nitrogen. In addition, sintering leads to out, for the corresponding density and / or composition of the compact in green, also under air, hydrogen, nitrogen mixtures and hydrogen with or without precise air supply, a gas endothermic, an exothermic gas or under vacuum, being able to perform sintering by microwave overlay or by microwave for temperature control.

The sintering stage can be followed immediately, preferably, a heat treatment as necessary, particularly an annealing of homogenization The heat treatment can be carried out in function of the chemical composition of the component obtained. So alternative or additional to heat treatment, the component sintered can cool sharply after reaching sintering temperature or homogenization annealing preferably in water or by abrupt cooling with gas.

It is possible to carry out, before or after the sintering, additional surface compaction, or more generally: apply a compression tension in areas of the surface, by means of sand jets or ball jets of steel, rollers or the like. It can also be carried out before or after homogenization annealing, a calibration. In this case, Calibration is performed at room temperature or at temperature high, up to the forging temperature, even by means of application of up to 900 N / mm2 pressure. Optionally, the calibration can even be carried out above the line solidus, in which case the component can be removed directly of sintering heat.

The calibration and / or forging tools used for calibration can be configured completely or partially conical, so that particularly high presses can be achieved in certain areas of the component. The temperature of the calibration and / or forging tools may differ depending on the component to be treated, and if necessary it can be maintained in the isothermal range. It is possible to carry out, before or after a heat treatment or calibration, a surface compaction, or an application of a compression tension itself in the
surface.

Finally, coatings can be applied on the sintered component, the procedures with those that the components undergo an anodization or a hard anodization, such as thermal processes of spray as plasma projection or flame projection, or physical and / or chemical procedures such as PVD, CVD or similar. Without However, coatings can also be carried out via completely chemical, such as lacquers lubricants, which may contain Teflon, or materials nanocomposites Through the coating, the surface of the components can be modified precisely, depending on your application, in its hardness, roughness and coefficient of friction.

These and other advantages of the present invention they are disclosed from the following examples.

Example 1

An Al-based powder of composition Al4Cu1Mg0.5Si (corresponding to designation AC2014 of a conventional aluminum alloy in which the base powder presents 4% by weight of Cu, 1% by weight of Mg, 0.5% by weight of Si and 94.5% by weight of Al, based on the total amount of powder) of ECKA Granulate GmbH & Co. KG, Velden, Germany, with trade name ECKA Alumix 123 (92.5% by weight of Al), with 1.5% by weight of an amide wax as a binding agent of the company Hoechst and trade name Mikrowachs C, mixed with powders molybdenum or tungsten according to table 1 below. The mixture is carried out in an asymmetric motion mixer, adding for 5 min. and at room temperature molybdenum powder or Powder tungsten based on Al previously introduced.

Al-based powder presented a distribution of grain size between 45 and 200 µm, the average particle diameter D 50 between 75 and 95 µm. He Molybdenum or tungsten powder added was produced by the company H.C. Starck GmbH & Co. KG, Goslar, Germany, and had an average particle diameter D 50 of 25 µm with a particle size distribution in a range between about 5 and 50 µm.

Then the powder mixture was introduced in a matrix mold and compressed at a pressure of approximately 175 N / mm2 (calculated for a front wheel surface of 20 cm2) for approximately 0.2 to 0.5 seconds at room temperature until you get a compact in green in the form of pump wheel The density of the compact in green was approximately between 2.35 and 2.38 g / cm3. Then it removed the wax from the green compact thus produced during approximately 30 min. at about 430 ° C and sintered at a sintering temperature of 610 ° C under an atmosphere of pure nitrogen with a dew point of -50ºC in a ribbon oven set at a speed of 3.4 m / h, for 30 min. To do this, the compact in green were deposited on Al 2 O 3 plates. A homogenization annealing was then carried out. for 1.5 h at a temperature of 515 ° C. Then the wheel of sintered pump was tempered by abrupt cooling in water with a temperature of about 40 ° C for 10 seconds.

Then a calibration was carried out until a theoretical density between 97 and 98% by weight using a pressure from about 810 N / mm2 at 200 ° C.

After calibration, a hardening of sintered pump wheels to high temperature, at 160 ° C and for 16 h. They were then determined the tensile strength R m, the modulus of elasticity and the deformation according to DIN EN 10002-1 in standardized samples. In addition, the hardness was determined according to the DIN EN 24498-1 (Brinell hardness) with a ball hardened steel as a penetration body with a diameter of 2.5 and a load of 62.5 kg. The values obtained are reflected in the table 1 below.

TABLE 1

Material R_ {m} * Elast module TO ** Hardness N / mm2 kN / mm2 % HB 2,5 2.5 / 62.5 kg Al4Cu1Mg0.5Yes + 8% by weight of Mo 205 87 0.01 122 Al4Cu1Mg0.5Si + 14% by weight of Mo 152 104 0.01 148 Al4Cu1Mg0.5Si + 8% by weight of W 144 74 0.01 105 Al4Cu1Mg0.5Si + 14% by weight of W 135 74 0.01 102 R_ {m} * = tensile strength A ** = deformation.

Example 2

The previous tests designated number 1 were repeated, however, adding a copper powder supplied by the Eckart Granules company under the Ecka Kupfer CH-S brand. The addition was carried out in such a way that, in the first place, the molybdenum or tungsten powder was mixed with the copper powder in an asymmetric mixer at room temperature for 5 min., Then mixing this mixture with the Al-based powder for 5 min. in an asymmetric motion mixer. The copper powder had an average particle diameter D 50 of 25 µm and a grain size distribution in a range between about 5 and 50 µm. The copper dust was produced by electrolysis, the individual particles were dendri-shaped.
Ethics

Different mixtures were prepared, sintering the same, as described for number 1, with and without Repressed until pump wheels are obtained. For reprinting, after pressing the wax of the compact in green was removed under a nitrogen atmosphere for 30 min. at about 430 ° C and, at then in a matrix mold identical to the first mold, which sprayed with Fuchs Lubritech GLEITMO 300 release agent GmbH, Weilerbach, Germany, reprimanded at a pressure of 760 N / mm2 for approximately 0.2 to 0.5 seconds at ambient temperature to the point that the density of the compact in Repressed green was approximately 2.8 to 2.9 g / cm2 and, with it, approximately between 19 and 23% higher than the compact in green of unrepressed pump wheel and with it about 95% of theoretical density.

Next, the green compact obtained were sintered in the manner described above, calibrated up to a theoretical density of 97 to 98% at a pressure of 810 N / mm2, although at room temperature, and hardened. The mixing ratio between molybdenum or tungsten powder and the Copper powder was 5: 1 parts by weight. In table 2 you can observe the mixing relationships as well as the physical values obtained.

TABLE 2

No. Material Repressed R_ {m} * Module elast. TO ** Hardness YES NO N / mm2 kN / mm2 % HB 2,5 2.5 / 62.5 kg 2nd Al4Cu1Mg0.5Si + 8% in X 226 88 0.03 138 weight  of Mo (80% in weight Mo + 20% by weight Cu) 2nd ' Al4Cu1Mg0.5Si + 8% in X 253 89 0.01 146 weight  of Mo (80% in weight Mo + 20% by weight Cu) 2b Al4Cu1Mg0.5Si + 10% in X 206 93 0.01 142 weight of Mo (80% in weight Mo + 20% by weight Cu) 2b ' Al4Cu1Mg0.5Si + 10% in X 227 96 0.03 150 weight  of Mo (80% in weight Mo + 20% by weight Cu) 2 C Al4Cu1Mg0.5Si + 12% in X 187 96 0.01 159 weight  of Mo (80% in weight Mo + 20% by weight Cu) 2 C' Al4Cu1Mg0.5Si + 12% in X 193 100 0.01 164 weight  of Mo (80% in weight Mo + 20% by weight Cu) 2d Al4Cu1Mg0.5Si + 14% in X 178 101 0.01 159 weight  of Mo (80% in weight Mo + 20% by weight Cu) 2d ' Al4Cu1Mg0.5Si + 14% in X 191 107 0.01 179 weight  of Mo (80% in weight Mo + 20% by weight Cu) 2e Al4Cu1Mg0.5Si + 8% in X 155 75 0.03 110 weight  of Mo (80% in weight W + 20% by weight Cu) 2e ' Al4Cu1Mg0.5Si + 8% in X 237 79 0.04 122 weight  of Mo (80% in weight W + 20% by weight Cu) 2f Al4Cu1Mg0.5Si + 10% in X 173 74 0.05 107 weight  of Mo (80% in weight W + 20% by weight Cu) 2f ' Al4Cu1Mg0.5Si + 10% in X 243 81 0.03 121 weight  of Mo (80% in weight W + 20% by weight Cu) 2 g Al4Cu1Mg0.5Si + 12% in X 147 73 0.05 107 weight  of Mo (80% in weight W + 20% by weight Cu)

TABLE 2 (continued)

No. Material Repressed R_ {m} * Module elast. TO ** Hardness YES NO N / mm2 kN / mm2 % HB 2,5 2.5 / 62.5 kg 2 g' Al4Cu1Mg0.5Si + 12% in X 233 86 0.04 121 weight  of Mo (80% in weight W + 20% by weight Cu) 2h Al4Cu1Mg0.5Si + 14% in X 146 76 0.05 107 weight of Mo (80% in weight W + 20% by weight Cu) 2h ' Al4Cu1Mg0.5Si + 14% in X 213 84 0.03 130 weight  of Mo (80% in weight W + 20% by weight Cu) R_ {m} * = tensile strength A ** = deformation.

As shown in Table 2, the properties Physicists are favored by the repressed. Particularly, an additional increase in the hardness of the wheels of pump produced.

With the present invention it is possible produce sintered components based on an Al powder, which does not only have excellent mechanical resistance values, but particularly high hardness. So, the components advantageously produced in this way can be placed in points subjected to great effort, particularly in the engine or in transmissions In addition, thanks to the possibility of eliminating the calibrated hardened sintered components can be produced in Hot more economically and quickly.

Claims (14)

1. Sinter powder mixture for production of sintered components, particularly for the automobile construction, which comprises between 60 and 98.5% by weight, based on the total amount of powder mixture, of one Al-based powder consisting of metals and / or their alloys, the which includes Al and, if necessary, contents of at least one of the following metals: 0.2 to 30% by weight of Mg, 0.2 to 40% by weight of Si, 0.2 to 15% by weight of Cu, 0.2 to 15% by weight of Zn, 0.2 to 15% by weight of Ti, 0.2 to 10% by weight of Sn, 0.5 to 5% by weight of Mn, 0.2 to 10% by weight of Ni and / or less than 1% by weight of As, Sb, Co, Be, Pb and / or B, the respective weight percentages referring to  the total amount of powder based on Al; and from 0.8 to 40% by weight, referred to the total amount of powder mixture, of a powder metallic selected from a first group of metals and / or their alloys consisting of Mo and / or W, as well as, optionally, of between a second group of metals and / or their alloys constituted by Cu, Sn, Zn, Li and / or Mg. 2. Sinterizable powder mixture according to claim 1, characterized in that the ratio between the amount of the first group of metals and / or their alloys, and the amount of the second group in the powder mixture is in a range between 1: 8 and 15: 1 parts by weight. 3. Sintering powder mixture according to one of the preceding claims, characterized in that the powder based on Al has, in addition to Al, 0.2 to 15% by weight of Mg, 0.2 to 16% by weight of Si , from 0.2 to 10% by weight of Cu and / or from 0.2 to 15% by weight of Zn, respectively referred to the total amount of powder based on Al. 4. Sintering powder mixture according to one of the preceding claims, characterized in that the second group of metals and / or their alloys has Cu, Zn and / or Sn. 5. Sintering powder mixture according to one of the preceding claims, characterized in that it comprises a lubricating agent in an amount comprised between 0.2 and 5% by weight, based on the total amount of powder mixture. 6. Sintered component produced from a sinter powder according to one of claims 1 to 5. 7. Sintered component according to claim 6, characterized in that it has a tensile strength of at least 140 N / mm2, measured according to DIN EN 10002-1. 8. Sintered component according to claims 6 or 7, characterized in that it has an elastic modulus of at least 70 kN / mm 2, measured according to DIN EN 10002-1. 9. Sintered component according to one of claims 6 to 8, characterized in that it has a hardness (HB 2.5 / 62.5 kg) of at least 100, measured according to DIN EN 24498-1. 10. Procedure for the production of sintered components, also of components, from a powder mixture according to one of claims 1 to 5, in the that:

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in a first stage, the powder mixture is introduced in a first mold;

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in a second stage, the powder mixture is compressed until a compact in green;

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in a third stage, the green compact is reprimanded, at least partially; Y

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in a fourth stage, the pressed green compact is sintered.

11. Method according to claim 10, characterized in that the wax of the compact in green is removed prior to the third stage. 12. Method according to one of claims 10 or 11, characterized in that the density of the compact in green reached by means of the pressing carried out in the third stage is between approximately 2 and 40% higher than the density before the pressing. 13. Method according to one of claims 10 to 12, characterized in that in the third stage, before introducing the green compact into a second mold, it is sprayed with a mold release agent. 14. Method according to one of claims 10 to 13, characterized in that the sintering process in the fifth stage is carried out under nitrogen with a dew point below -40 ° C.