KR920009037B1 - Process for producing extruded aluminium alloys - Google Patents

Abstract

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Description

Manufacturing Method of Aluminum Alloy Extruder

The present invention relates to a method for producing an aluminum alloy extruded material, in particular, to a method for producing an extruded material produced from a highly dynamic aluminum alloy containing a relatively large amount of additional elements and exhibiting high deformation resistance even under heating.

Throughout the specification and claims, all percentages used in the alloying components are by weight. The production of an extruded material made of aluminum or an aluminum alloy is generally carried out by first producing these extruded billets in advance, heating them, and then extruding them in an extruder.

In other words, ingots of aluminum or aluminum alloy are first melted in a melting furnace, solidified by the most commonly semi-continuous casting method to form billets, and then the billets are subjected to homogenization heat treatment in a homogenization furnace, and then The billet is manufactured by heating to an extrusion temperature and then extruding with an extruder. By the way, also in aluminum materials, the performance improvement is strongly demanded these days.

For example, aluminum materials used for automobiles, machinery parts, and other structural materials are required to be as strong as possible, and parts subjected to strong friction such as engine cylinders, pistons, or compressor vanes. In the aluminum material used as a thing, it is requested to hold heat resistance as well as high wear resistance as much as possible.

In addition, in aluminum materials used for sliding bearings of automobile engines, excellent lubricity is required in aluminum materials used as structural materials for spent nuclear fuel storage warehouses.

In order to respond to these various requests, a relatively large amount of second phase elements must be added to aluminum for improving the properties.

For example, in order to obtain high strength, Zn, Mg, Cu, etc. are contained in a relatively large proportion, and in order to improve wear resistance, a large amount of Si is added, and elements such as Ni, Fe, Cr, Mn, etc. are added to improve heat resistance. It is added in a relatively large proportion.

By the way, in the case of the so-called high-concentration aluminum alloy containing a large amount of the hardening element, the high melting point metal element, etc. as described above, in the conventional method for producing an extruded material according to the above-described process, at the time of solidification Since the deformation resistance at the high temperature of a billet becomes remarkably high, the trouble that extrusion processing becomes difficult arises.

For this reason, in the case of manufacturing as an extruded material, it is difficult to obtain it as an extruded material, although it is difficult to obtain various properties of the so-called high-concentration aluminum alloy containing a high melting point element due to restrictions on alloy composition. There was.

Problem like this. Also in the case of an aluminum alloy containing a large amount of low melting point metal elements such as Pb and Sn to improve the lubrication characteristics, or in the case of an aluminum alloy in which a large amount of B is added to increase neutron absorption characteristics, The same occurred because of the tendency of nonuniformity of the structure due to segregation of the additive element or the difficulty of casting the same billet as described above.

An object of the present invention is to provide a method which makes it possible to produce an extruded material even in a high-concentration aluminum alloy containing a relatively large amount of an element added for improving the properties under the above technical background.

Another object is to provide a method in which an aluminum alloy extruded material having a more uniform structure can be obtained as compared with a conventional production method. Still another object is to provide a method for producing an extruded aluminum material which can achieve energy saving and energy saving by simplifying a manufacturing process and further improve manufacturing efficiency.

Another object is to provide an advantageous method for producing an aluminum alloy extruded material having a specific chemical composition having high strength, high wear resistance, or excellent neutron absorption characteristics and lubricity.

In the above object, the present invention is that aluminum is dissolved once, the molten metal is directly injected into a container of an extruder, and the container is used as a pressure-resistant container for solidification to advance the extrusion rod. While pressurizing the molten alloy, the solidification proceeds to produce a billet-shaped solidified product.

In other words, in the container of the extruder, a coagulated product is produced by a process coagulation method. Of course, during this process, the extrusion hole of the extrusion die is kept in a closed state. Then, when solidification proceeds to the required degree, the extrusion hole is opened, the extrusion rod is further pushed out, and predetermined extrusion processing is performed.

In the case described above, the billet-shaped solidified product produced by pressure solidification does not necessarily have to be completely solidified in its entirety, but is prepared in a reaction state in which a part of the liquid component is still contained. It may be extruded immediately.

According to the present invention, since the molten aluminum or aluminum alloy is solidified under pressure and then extruded, the structure of the billet solidified material provided for extrusion can be made fine, and the conventional homogenization heat treatment step can be omitted. In addition, the extrusion property can be made good, and it is possible to prevent defects such as shrinkage and pin holes during the solidification process, and to obtain an extruded material free of material defects. There is a number.

In addition, by employing the pressure coagulation method, even in a so-called high concentration alloy containing a relatively large amount of high melting point element, a series of processes from solidification to extrusion can be performed without difficulty, and furthermore, it is difficult to manufacture in the conventional method. Extruded material with a high concentration of aluminum alloy also enables its manufacture.

In addition, since the structure of the coagulum can be refined from the beginning, the required pressure output can be reduced, and the extruded material itself can be excellent in the fine mechanical properties of the structure.

As described above, not only the conventional homogenization heating step can be omitted, but also the pre-heating step of the billet before extrusion can be omitted, which can save a great amount of heat energy and improve the economics. .

In addition to omitting the foregoing step, in the present invention, the molten aluminum or alloy thereof is poured directly into a container of an extruder, pressurized and solidified, and then extruded as it is, so that a wider range of steps is achieved. In addition to simplicity and saving of heat energy, the equipment to be used is the least, and it is possible to manufacture an extruded material at a high efficiency and at a low cost with a shortening effect of the process.

Other objects and advantages of the present invention will become more apparent from the following detailed description.

In the practice of the present invention, first, an aluminum alloy to be subjected to compression processing, for example, a high concentration aluminum alloy containing a relatively large amount of high melting point element is dissolved according to a conventional method, and the molten metal is directly poured into the container of the extruder. .

At this time, the hole in the die portion provided at one end of the container is closed by the closing member detachably attached.

Moreover, it is preferable that a container performs said pouring in the state which preheated this to the range of 300-350 degreeC.

In other words, when hot molten metal is directly injected into a container of less than 300 ° C, solidification of the molten aluminum alloy immediately improves in the portion in contact with the container after pouring, so that the effect due to pressure solidification is difficult to be sufficiently achieved.

On the other hand, when heated to a high temperature of more than 350 ℃, the cooling rate is slow, the pressure coagulation process takes a long time and disadvantageous, as well as crystallization and growth of the structure after solidification is fine. The tendency to tend to be dissipated is seen.

After the completion of the pouring, the billet was solidified until it is suitable for extrusion processing by advancing the extrusion rod of the extruder a predetermined distance, applying a predetermined pressure to the molten metal in the container, and proceeding cooling solidification under this pressure. Produce a solidified state. This pressure solidification increases heat transfer to the container, and growth of primary and process is inhibited by the metal cooling effect and the pressure effect resulting from the solidification. have. In addition, since the pressing action is performed throughout the solidification process, it is possible to effectively prevent the occurrence of bonding such as shrinkage, pinhole, and the like.

Therefore, the coagulated product can be obtained by having a microstructure and excellent compressibility without void defects.

The pressure applied to the above-mentioned pressure coagulation step can obtain the effect of pressure coagulation if it is 50 kgf / cm 2 or more, but preferably it is in the range of about 500-1000 kgf / cm 2.

In this way, by solidifying the aluminum alloy in a predetermined pressurized state, it is possible to produce a solidified product with little crystallized product without generating a casting crack.

Therefore, when manufacturing a billet by the conventional casting method. It is possible to omit the subsequent homogenization heat treatment necessary for the homogenization and miniaturization of the structure, thereby achieving heat energy and processing time saving therefor.

The magnitude of the pressing force does not significantly affect the quality of the coagulated product. However, at less than 50 kgf / cm 2, it is insufficient for the effect of preventing cracking and miniaturization of the crystal grains by the pressure coagulation method. On the other hand, it is not economical because a proportional improvement of the effect exceeding 1500 kgf / cm 2 is not seen.

When the molten metal reaches a predetermined solidification state by the above-mentioned pressure solidification, the addition of the pressing force is stopped once, and the extrusion hole of the die removes the blocking member to open the extrusion hole, and then pushes the extrusion rod again. Normal extrusion processing is started inside, and a desired extrusion material is obtained.

In this case, the initiation of extrusion may be performed after the solidified product has reached the complete solid state once cooled, but preferably the temperature at which the solidified product is suitable for extrusion processing by the advancement of the above-mentioned pressure solidification, In other words, it is recommended that the pressurizing step be terminated and the extrusion is started immediately when the temperature of the liquid phase is lowered to 1 / 3-2 / 3, particularly preferably about 1/2, and the semi-molten state is reached.

By adopting such a procedure, it is possible to omit the reheating step of the coagulated product during extrusion processing, to save energy and time required for the heating, to improve the production efficiency of the alloy extrusion material and to reduce the manufacturing cost. Can be promoted.

Although the aluminum alloy extruded material of various kinds can be manufactured by the manufacturing method which concerns on the above-mentioned this invention, especially the aluminum alloy of the composition which was difficult to manufacture as an extruded material conventionally, it is an extruded material. It is possible to manufacture a new aluminum material, and in particular, to produce a new useful aluminum material such as the following (a)-(d) efficiently and thus inexpensively.

(a) high strength aluminum alloy extrusion

Al-Zn-Mg-Cu-based alloys such as A7050, A7178, and A7050 are known as high-strength aluminum alloys required for mechanical parts. Attempts have been made to further increase the amount of addition of hardening elements such as Zn, Mg and Cu.

By the way, when the addition amount of these hardening elements is increased, manufacture as a whole body material will become remarkably difficult because of casting crack generation.

According to the present invention, it is possible to solve the above problems and to produce Al-Zn-Mg-Cu-based alloys having excellent mechanical properties and to produce them as extruded materials without any problems.

That is, according to the present invention, Zn: 7-12%, Mg: 2-7%, Cu-0.5-3%, more preferably, Mn: 0.2-1%, Cr: 0.1-0.4%, Zt: An aluminum alloy extruded material containing one or two or more elements selected from the group consisting of 0.05-3%, the remainder being made of aluminum, is provided.

In this high strength Al-Zn-Mg-Cu-based alloy, Zn, Mg and Cu contained as essential components mainly contribute to the improvement of the strength of the alloy as already known, and all are less than the lower limit, that is, Zn: less than 7%. When Mg is less than 2% and Cu is less than 0.5%, it is impossible to realize high strength beyond the area of achievement of conventional alloys as expected by the present invention.

Therefore, when it is based on content below the said lower limit, continuous casting of the billet by the conventional method is possible, and it is less meaningful to employ | adopt the manufacturing method of this invention.

Moreover, when exceeding Zn: 12%, Mg: 7%, Cu: 3% which are upper limits, respectively, also when producing the billet-shaped solidified material by the high pressure coagulation | solidification method of this invention, the coarse of the above-mentioned element is carried out. One crystallization generate | occur | produces and hinders achievement of the high strength of an alloy material. In particular, even if it contains more than 12%, the proportional strength improvement effect cannot be expected and is meaningless.

The most preferable content is about Zn: 8-10%, Mg: 3-5%, Cu: 1-2%.

Mn, Cr, and Zr added as an optional ingredient as needed can all be evaluated as equivalents in that they are effective in miniaturizing crystal grains and improving stress corrosion cracking resistance. Mn: less than 0.2%, Cr: 0.1 In the case of less than%, Zr: less than 0.05%, the above-mentioned effects are small, and in the case of Mn: more than 1.0%, Cr: more than 0.4%, or Zr: more than 0.3%, they are expected to generate their coarse crystals in the alloy. High strength of the alloy of the bar cannot be achieved.

(b) Wear-resistant aluminum alloy extruded material

This invention enables manufacture as an extrusion material by the Al-Si type alloy which is excellent in abrasion resistance or further excellent in heat resistance and a low thermal expansion coefficient.

Such wear-resistant aluminum alloy contains Si: 4-40%, preferably Cu: 4-20%, or

Fe: 0.5-20%

Cr: 0.5-20%

Mn: 1-20%

Ni: 0.5-20%

Ti: 0.5-10%

Be: 1-20%

V: 1-20%

Y: 2-20%

Zr: 0.5-10%

Mg: 0.3-2%

It contains one type or two or more types of elements selected from the group which consists of two, and the remainder consists of aluminum.

Si contained as an essential component in the wear-resistant aluminum alloy described above is essential as a wear-resistant improving component. By containing Si: 4% or more, the effect corresponding to the addition amount can be acquired, It is preferable to make it contain in a hyper eutectic region 12% or more preferably. When it contains excessively in excess of 40%, such extrusion becomes difficult.

Therefore, in general, it is desirable to obtain a balance point between the demand for wear resistance and the ease of manufacture, and to adjust the range in the range of about 16-30%. Fe, Cr, Mn, Ni, Ti, Cu, V, Y, and Zr all have the added meaning in improving the high temperature characteristics such as improving the heat resistance of the alloy material and decreasing the thermal expansion coefficient. In the invention, they can be evaluated as equivalents to each other.

If any element is less than the lower limit prescribed | regulated as mentioned above, it will become inadequate in the improvement effect of the said high temperature characteristic. On the contrary, when it contains excessively exceeding an upper limit, extrusion will become difficult by generation | occurrence | production of a coarse eluate.

Moreover, Mg contributes to the improvement of the strength of the alloy, and the effect is insufficient at less than 0.3%.

In addition, containing more than 2% does not significantly increase the above-mentioned effect, but rather produces coarse crystallized materials, resulting in inferior mechanical properties.

(c) Aluminum alloy extruded material with excellent neutron absorption

In addition, the present invention enables the production of an extruded material of an Al-B alloy containing a large amount of B as an aluminum alloy having excellent neutron absorption characteristics. This Al-B alloy contains B: 0.5-12 wt%, Mg: 0.5-6% and Si: 0.2-1.5 wt%, if necessary, and the remainder is an aluminum alloy composed of aluminum and inevitable impurities. It is made of. B as an essential component exhibits neutron absorption effect and contributes to strength improvement.

However, at less than 0.5wt%, their effects are insufficient, whereas if it exceeds 12wt%, extrusion processing becomes difficult.

In addition to the above-mentioned essential components, the content of one or both of Mg: 0.5-6wt% or Si: 0.2-5wt% is allowed as an optional ingredient as necessary.

Mg has the effect of improving the strength and also contributes to the prevention of deterioration of corrosion resistance, but less than 0.5wt% has no effect of improving the strength, and when contained in excess of 6wt%, extrusion processing is difficult and also corrosion resistance It is a cracking problem.

On the other hand, Si coexists with Mg and contributes to the improvement of strength, but it is ineffective at less than 0.2 wt%, and conversely, even if it exceeds 1.5 wt%, the strength is lowered.

In addition to the above components, as the grain refinement element, about 0.1-0.6 wt% Mn, about 0.05-0.3 wt% Cr, about 0.05-0.3 wt% Zr, and about Ti: You may add about 0.01-0.2 wt% arbitrarily.

(d) Aluminum alloy extruded material with excellent lubricity

In addition, according to the present invention, an aluminum alloy having excellent lubrication characteristics, which can be preferably used as a sliding bearing member, can be produced as an extruded material. This extruded material contains 1.5-7 wt% of Cu, and contains one or two or more of Pb: 1-15 wt%, Sn: 1-15 wt%, Bi: 1-15 wt%, and In: 1-15 wt%. It is prepared by using an aluminum alloy containing, in addition, Si: 5-20% and / or Mg: 0.1-3 wt%, if necessary, the remainder being made of aluminum and an unavoidable impurity. Cu as an essential component contributes to strength improvement.

However, at less than 1.5 wt%, the effect is poor, and on the contrary, even if it contains more than 7 wt%, the strength decreases.

Pb, Bi, Sn, and In as low melting point elements effectively act as an element for improving the lubricity during friction, and are evaluated as equivalents in the present invention in view of this action.

Therefore, the effect can be exhibited if at least 1 type of these elements is contained.

However, when each content of these elements is less than 1 wt%, the lubricating effect is inadequate, and when it contains more than 15 wt%, extrusion processing becomes difficult.

In addition to the above-mentioned essential components, any one or both of Si: 5-20 wt% and Mg: 0.1-3 wt% is allowed as an optional ingredient, or Mn: 0.1-0.8 wt%, Cr: 0.05- One or two or more of 0.35 wt%, Zr: 0.05-0.3 wt%, Ti: 0.01-0.2 wt%, and B: 0.002-0.04 wt% are allowed regardless of whether Si or Mg is contained.

Si has an effect on improving the wear resistance of the alloy, but the effect is poor at less than 5 wt%, on the contrary, if it exceeds 20 wt%, a drawback leads to a decrease in extrusion processability.

Mg has an effect of improving the strength of the alloy, but less than 0.1wt%, the effect is poor, on the contrary, even if it exceeds 3wt%, the strength decreases. Mn, Cr, and Zr are micronized elements that contribute to the refinement of the alloy structure, while Ti and B contribute to the refinement of the ingot, but below the lower limit, the effect is poor. On the contrary, when the upper limit exceeds Mn, Cr, Zr, A large crystallized substance, such as a Zr type | system | group, is produced and a mechanical strength will fall.

Next, the Example of this invention is shown.

Example 1

In this embodiment, a high-strength aluminum alloy, particularly Al-Zn-Mg-Cu based alloy having excellent mechanical properties is produced as an extruded material.

Therefore, as shown in the first table, in particular, the content of Zn is remarkably large compared with the known A7000-based alloy, making it difficult to manufacture by the conventional extrusion molding method.

TABLE 1

No. shown in said 1st table | surface. 1-5 alloys of various chemical compositions were dissolved at a liquidus temperature of + 100 ° C, the molten metal was poured into a container of an extruder heated to about 320 ° C, and the extrusion rod was immediately advanced to pressurize it to 1000 Kgf / cm 2, It solidified under the pressurization.

And when it cooled to the temperature of about 1/2 of liquidus temperature, the pressure solidification process was complete | finished, and the obtained billet-shaped solidified material (75 mm diameter, 100 mm length) was immediately extruded by the round bar of diameter 12mm. . In this case, the extrusion can be performed without any problem.

Subsequently, the extruded material was subjected to a solution treatment at 460 ° C. and aged at 120 ° C. for 24 hours, and then the mechanical properties of the obtained samples were examined.

The results are shown in the second table.

In addition, the comparative alloy shown as a comparison method in a 1st table | surface and a 2nd table | surface is an alloy of the composition range whose content of Zn, Mg, and Cu becomes the approximate value in manufacture at the time of a conventional manufacturing method, and is conventionally According to the method of the present invention, the extruded material is produced as a billet in advance and, after homogenization treatment, is used as a test material.

TABLE 2

As shown in the above-mentioned second result, the alloy of the present invention is mainly slightly higher than that of the comparative method of the alloy which is the limit of the Zn content in the case of the conventional manufacturing method due to the high content of Zn. Although elongation falls, it turns out that it is remarkably excellent in tensile strength and durability.

Example 2

This example is a case where an aluminum alloy extruded material having excellent wear resistance is obtained. Table 3 shows various alloy compositions used for the production of the extruded materials, all of which are remarkably difficult to manufacture by the conventional method of manufacturing a conventional extruded material, due to the high content of Si and the large amount of various other elements. Is impossible or impossible.

TABLE 3

The alloys of the various chemical compositions shown in the above first table were melted at a liquidus temperature of + 100 ° C, and the molten metal was poured into a container of an extruder heated to about 320 ° C in advance, and then the extrusion rod was immediately advanced to obtain 1000 Kgf / Pressurized to 2 cm <2> and it solidified under the pressurization.

And when it cooled to the temperature of about 1/2 of liquidus temperature, the pressure coagulation | solidification process was complete | finished, and the obtained semi-molten billet-shaped solidified material (diameter 75mm, length 100mm) was immediately extruded by the round bar of diameter 12mm.

In this case, the extruded material was subjected to solution treatment at 490 ° C. and aged at 180 ° C. for 7 hours, and then the tensile strength and the coefficient of thermal expansion were examined at 300 ° C. by the heat resistance test. Was performed.

The results are shown in Table 4 below.

In addition, the abrasion resistance test was conducted under the condition of a relative material: PC30 and a frictional speed: 2 m / sec using an Ogoe type abrasion resistance tester (dry).

TABLE 4

As shown in the fourth table, the aluminum alloy extruded materials produced in accordance with the present invention had extremely excellent wear resistance, excellent heat resistance, and low thermal expansion number.

Example 3

This embodiment produces an aluminum alloy extruded material having excellent neutron absorptivity.

TABLE 5

Using the alloy of the various compositions shown in the above-mentioned 5th table, it manufactured by the round bar extruded material of diameter 12mm by the same process as Example 2 mentioned above.

Among the test materials obtained as described above, No. About 1, 3, and 4, the mechanical property was measured as it is.

In addition, No. The specimen 2 was then subjected to water quenching after solution treatment at 520 ° C., and aged at 180 ° C. for 7 hours, and then examined for mechanical properties of the obtained sample.

The results are shown in Table 6.

TABLE 6

On the other hand, the tensile strength of the dispersed aluminum alloy (Broal) containing 30-35% of conventionally known B ₄ C as a comparative example was found to be about 10 Kgf / cm 2.

As can be seen from the above results, according to the present invention, it is possible to provide a material having a higher strength than the conventional dispersed aluminum alloy.

It has also been found that the aluminum alloy can be manufactured as an extruded material without any deterioration even if the B flow rate of B is increased (sample No. 3).

Therefore, it was confirmed that the provision of a material superior in neutron absorbance can be realized.

Example 4

This embodiment obtains an aluminum alloy extruded material having lubricating properties.

TABLE 7

Sample No. in the alloy of various compositions shown in the above-mentioned seventh table. As shown in 1-6, all were manufactured from the round bar extruded material of diameter 12mm by the process similar to Example 2 mentioned above.

Next, the extruded material was subjected to a solution treatment at 490 ° C. and aged at 180 ° C. for 7 hours, and then examined for mechanical properties and wear resistance by abrasion resistance test.

In addition, wear resistance was performed on the same conditions as the case of Example 2 mentioned above.

On the other hand, sample No. 7 and No. About the alloy of 8, it casted with the metal mold | die conventionally and heat-treated on the same conditions as mentioned above.

Then, the mechanical properties and wear resistance of the obtained material were examined under the same conditions as described above.

These results are shown in Table 8.

TABLE 8

As can be seen from the above results, it was confirmed that the product of the present invention was excellent in both mechanical properties and wear resistance as compared with the comparative product.

The reason why the wear resistance of the embodiment of the present invention is good is considered to be that the lubrication effect due to the low melting point element eluted by frictional heat is large.

Claims (17)

The molten aluminum alloy is directly poured into the container of the extruder heated beforehand, and the solidification is performed by advancing the extrusion rod while applying the pressing force of 50 Kg / cm 2 or more while the extrusion hole of the die is closed to advance the solidification. After producing the solids of the molten to completely solidified state leaving the left, the extrusion process of the aluminum alloy extruded material, characterized in that the extrusion process under the liquidus temperature without continuing to reheat. The method for producing an aluminum alloy extruded material according to claim 1, wherein the molten aluminum alloy is heated beforehand to a container of an extruder at 300 to 350 ° C. The pressure solidification step in the container is finished at the time when the temperature of the aluminum alloy falls in the range of 1 / 3-2 / 3 of the liquidus temperature, and is immediately extruded. Method for producing aluminum alloy extruded material. The high-strength aluminum alloy extruded material according to claim 1, wherein an aluminum alloy containing Zn: 7-12%, Mg: 2-7%, Cu: 0.5-3%, and the rest of which is made of aluminum and an unavoidable impurity is used. Manufacturing method. The method according to claim 1, wherein Zn: 7-12%, Mg: 2-7%, Cu: 0.5-3%, Mn: 0.2-1%, Cr: 0.1-0.4%, Zr: 0.05- A method for producing a high-strength aluminum alloy extruded material, comprising one or two or more elements selected from the group consisting of 0.3%, the remainder being aluminum and inevitable impurities. The method for producing an aluminum extruded material having excellent wear resistance according to claim 1, wherein an aluminum alloy containing Si: 4-40% and the remainder of which is made of aluminum and an unavoidable impurity is used. The method for producing an aluminum alloy extruded material having excellent wear resistance according to claim 1, wherein an aluminum alloy containing 4% to 40% of Si and 4% to 20% of Cu is used. The method of claim 1, wherein Si is contained 4-40%, Fe is 0.5-20%, Cr is 0.5-20%, Mn is 1-20%, Ni is 0.5-20%, and Ti is 0.5-10. %, Be: 1-20%, V: 1-20%, Y: 2-20%, Zr: 0.5-10%, Mg: 0.3-2% A method for producing an aluminum alloy extruded material having excellent wear resistance, in which an aluminum alloy composed of aluminum and an unavoidable order is used. The method according to claim 1, wherein Si: 4-40%, Cu: 4-20%, Fe: 0.5-20%, Cr: 0.5-20%, Mn: 1-20%, Ni: 0.5-20 %, Ti: 0.5-10%, Be: 1-220%, V: 11-20%, Y: 2-20%, Zr: 0.5-10%, Mg: 0.3-2% Or a method of producing an aluminum extruded material having at least two kinds of abrasion resistance, in which an aluminum alloy containing two or more kinds of aluminum and an unavoidable impurity is used. The method for producing an aluminum extruded material according to claim 1, wherein the aluminum alloy containing B: 0.5-12% and the remainder of which is made of aluminum and an unavoidable impurity is used. The method according to claim 1, wherein B: 0.5-12%, Mg: 0.5-0.6%, Si: 0.2-1.5%, one or two or more elements, and the remaining portions are made of aluminum and inevitable impurities. A method for producing an aluminum alloy extruded material having excellent neutron absorptivity in which an aluminum alloy is formed. The method of claim 1, wherein B: 0.5-12%, Mn: 0.1-0.6%, Cr: 0.05-0.3%, Zr: 0.05-0.3%, Ti: 0.01-0.2% A method for producing an aluminum alloy extruded material having excellent neutron absorptivity, which contains a species or two or more elements, and an aluminum alloy composed of aluminum and an unavoidable impurity is used. The method according to claim 1, which contains B: 0.5-12%, Mg: 0.5-6%, Si: 0.2-1.5%, one or two elements, Mn: 0.1-0.6%, An aluminum alloy containing one or two or more elements selected from the group consisting of Cr: 0.05-0.3%, Zr: 0.05-0.3%, and Ti: 0.01-0.2%, the remainder being aluminum and inevitable impurities A method for producing an extruded aluminum alloy with excellent neutron absorption. The method of claim 1, wherein Cu: 1.5-7%, Pb: 1-15%, Sn: 1-15%, Bi: 1-15%, In: 1-15% selected from the group consisting of A method for producing an aluminum alloy extruded material having excellent lubricity, which contains a species or two or more elements, and an aluminum alloy composed of aluminum and an unavoidable impurity is used. The method according to claim 1, which contains Cu: 1.5-7 and is selected from the group consisting of Pb: 1-15%, Sn: 1-15%, Bi: 1-15%, and In: 1-15%. Or an aluminum alloy containing two kinds of elements, and containing one or two kinds of elements of Si: 5-20% and Mg: 0.1-3%, the remainder being aluminum and an unavoidable impurity. Method for producing aluminum alloy extruded material. The method according to claim 1, which contains Cu: 1.5-7%, Pb: 1-15%, Sn: 1-15%, Bi: 1-15%, In: 1-15% selected from the group consisting of: Species or two or more elements and are selected from the group consisting of Mn: 0.1-0.8%, Cr: 0.05-0.35%, Zr: 0.05-0.3%, Ti: 0.01-0.2%, and B: 0.002-0.004% A method for producing an aluminum alloy extruded material having excellent lubricity in which an aluminum alloy containing one or two or more elements and remaining portions of aluminum and an unavoidable impurity is used. The method of claim 1, wherein Cu: 1.5-7%, Pb: 1-15%, Sn: 1-15%, Bi: 1-15%, In: 1-15% selected from the group consisting of Species or two kinds of elements, and contains one or two elements of Si: 5-20%, Mg: 0.1-3%, Mn: 0.1-0.8%, Cr: 0.05-0.35% , Zr: 0.05-0.3%, Ti: 0.01-0.2%, B: 0.002-0.04% selected from the group consisting of one or two or more elements, the remainder is used aluminum alloy consisting of aluminum and inevitable impurities Method for producing an extruded aluminum alloy material with excellent lubricity.