CN110629085B - High-weldability aluminum alloy armor part with high-speed impact resistance and manufacturing method thereof - Google Patents
High-weldability aluminum alloy armor part with high-speed impact resistance and manufacturing method thereof Download PDFInfo
- Publication number
- CN110629085B CN110629085B CN201911018779.9A CN201911018779A CN110629085B CN 110629085 B CN110629085 B CN 110629085B CN 201911018779 A CN201911018779 A CN 201911018779A CN 110629085 B CN110629085 B CN 110629085B
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- alloy
- temperature
- welding
- extrusion
- 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.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/21—Presses specially adapted for extruding metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
- B21C29/003—Cooling or heating of work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/03—Making non-ferrous alloys by melting using master alloys
-
- 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
- C22C21/10—Alloys based on aluminium with zinc as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- 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
- C22F1/053—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 zinc as the next major constituent
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
- F41H5/023—Armour plate, or auxiliary armour plate mounted at a distance of the main armour plate, having cavities at its outer impact surface, or holes, for deflecting the projectile
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses an aluminum alloy armor part with high weldability and high-speed impact resistance and a manufacturing method thereof, and relates to the field of aluminum alloy casting, extrusion and welding. The invention aims to solve the problems that most of the existing anti-collision aluminum alloy sections play a protective role through structures, the manufacturing cost is high, the process flow is high, and meanwhile, the application of the existing 7XXX aluminum alloy on an armor structural member is limited due to poor welding performance. The material consists of 7.5 to 12 percent of Zn, 0.8 to 3.0 percent of Mg, 1.2 to 2.5 percent of Cu, 0.05 to 0.5 percent of Zr, 0.01 to 0.5 percent of Fe, 0.05 to 0.4 percent of Si and the balance of Al according to the mass percentage. The method mainly comprises the following steps: firstly, smelting an intermediate alloy; secondly, smelting pure aluminum liquid and pouring; thirdly, extrusion forming; fourthly, heat treatment; and fifthly, welding. The invention is used for manufacturing the armored piece with excellent mechanical property, welding property and high-speed impact resistance.
Description
Technical Field
The invention relates to the field of aluminum alloy casting, extruding and welding, in particular to an aluminum alloy armor part with high weldability and high-speed impact resistance and a manufacturing method thereof.
Background
The aluminum alloy material has excellent comprehensive performance, is still the main material for national industry, aerospace and national defense at present, and particularly occupies no place in the process of light weight. Traditional aluminum alloys such as 5083 have been well-established for use in armor parts, but require large thickness of the armor parts, occupy a large amount of space, and are very disadvantageous for improving the armor structure. The armor component has high requirements on the performance of materials, and must have good high-speed impact resistance, and high-strength aluminum alloy is a more ideal choice, but the poor welding performance limits the application of the high-strength aluminum alloy in the armor component.
Utility model (CN 207526316U) discloses an aluminum alloy plate of anti striking, and this plate structure is inside to be provided with baffle and extrusion device, can effectually resist the impact force through this structure, effectively avoids aluminum alloy plate to appear the recess after receiving the striking, and this anti striking aluminum alloy plate is crashproof structure nevertheless, plays crashproof effect through structural design.
Utility model (CN 207579951U) discloses an aluminum alloy ex-trusions for car anticollision roof beam, include the cavity frame of constituteing by preceding terminal surface, up end, rear end face and lower terminal surface side end to end connection. The aluminum alloy section bar of the frame structure can effectively provide an impact absorption effect.
Therefore, most of the existing anti-collision aluminum alloy sections mainly adopt structural protection, including structural processing and assembly, so that the manufacturing cost is high and the process flow is long. The 7XXX series aluminum alloy is a high-strength aluminum alloy commonly used in national defense at present and has excellent anti-collision property, however, the alloy structure formed after the subsequent heat treatment of the 7XXX aluminum alloy is not beneficial to the improvement of the welding performance, and the application of the 7XXX series aluminum alloy in an armor structural member is limited. Therefore, by changing the types and the contents of elements in the alloy, combining the effective extrusion process and the heat treatment process and simultaneously adopting the advanced welding process, the anti-collision performance of the alloy can be improved, and the welding strength of the alloy can be effectively improved. Therefore, it is very necessary to find a method for manufacturing a armor having excellent impact resistance, which can be produced by extrusion, is low in cost, and has improved efficiency, and a 7 XXX-series aluminum alloy can be produced by extrusion.
Disclosure of Invention
The invention aims to solve the problems that most of the existing anti-collision aluminum alloy sections play a protective role through structures, the manufacturing cost is high, the process flow is high, and meanwhile, the application of the existing 7XXX aluminum alloy on an armor structural member is limited due to poor welding performance. And to provide an aluminum alloy armor member having high weldability and high-speed impact resistance, and a method for manufacturing the same.
An aluminum alloy armor part with high weldability and high-speed impact resistance is composed of, by mass, 7.5% -12% of Zn, 0.8% -3.0% of Mg, 1.2% -2.5% of Cu, 0.05% -0.5% of Zr, 0.01% -0.5% of Fe, 0.05% -0.4% of Si, and the balance of Al.
The manufacturing method of the aluminum alloy armor part with high weldability and high-speed impact resistance is carried out according to the following steps:
firstly, smelting an intermediate alloy: preparing materials from 7.5-12% of Zn, 0.8-3.0% of Mg, 1.2-2.5% of Cu, 0.05-0.5% of Zr, 0.01-0.5% of Fe, 0.05-0.4% of Si and the balance of Al according to mass percentage to obtain metal to be smelted, wherein Zn adopts a zinc ingot, and Mg, Cu, Zr, Fe and Si adopt intermediate alloy; the rest Al is pure aluminum ingot; meanwhile, 0.08-0.2% of refining agent and 0.05-0.07% of alterant are weighed according to the total mass of the metal to be smelted; setting the furnace gas temperature to 850-900 ℃, sequentially adding prepared zinc ingots and intermediate alloys into a smelting furnace from large to small according to the block weight and size, stirring the melt at a rotating speed of 250-350 r/min for 10-20 min, keeping the temperature for 2h, raising the furnace gas temperature to 920-950 ℃ to obtain an alloy melt, and keeping the temperature for later use;
smelting and pouring: under the protection of inert atmosphere, melting a pure aluminum ingot at the temperature of 700-800 ℃ to obtain pure aluminum liquid, preserving heat for 1-2 h, then raising the temperature of the pure aluminum liquid to 850-900 ℃, and preserving heat for later use; adding the alloy melt into pure aluminum liquid, adding a refining agent, refining for 15-30 min, adding a modifier, stirring at a rotating speed of 450-600 r/min for 30-40 min to obtain an alloy melt, keeping the temperature for 2-3h, and adding the alloy solution into a casting machine at the temperature of 800-850 ℃ to obtain an aluminum alloy ingot;
thirdly, extrusion forming: respectively preheating the aluminum alloy cast ingot and an extruder, and controlling the extrusion speed to obtain an aluminum alloy section required by the high-performance armored piece;
fourthly, heat treatment: carrying out heat treatment on the aluminum alloy section required by the high-performance armored piece to obtain an aluminum alloy armored piece section;
fifthly, welding: and connecting the parts to be welded by adopting a friction stir welding process to obtain the welded aluminum alloy armor structural member.
The invention has the beneficial effects that:
the invention not only can improve the anti-collision performance of the alloy, but also can effectively improve the welding strength of the alloy by adjusting the types and the contents of alloy elements, combining the effective extrusion process and the heat treatment process and adopting the advanced welding process. The high-speed impact resistance of the 7XXX series aluminum alloy is ensured, and the aluminum alloy has excellent welding property. Under the condition of room temperature, the tensile strength is more than 600MPa, the yield strength is more than 550MPa, and the elongation is more than 7 percent; in addition, the alloy is suitable for welding by adopting a friction stir welding process, and the strength of a welding head is more than 390 MPa. The extruded section has excellent anti-collision performance, and can be directly used for preparing a plate required by an armored piece through forward/backward extrusion, the extruded plate with the thickness of 20mm can effectively protect the firing range of 100m and the fire-through bomb with the thickness of 7.62mm, and the safe damage angle is 35 degrees; the extruded sheet material with the thickness of 30mm can effectively protect the fire range of 100m and the fire bomb with the thickness of 7.62mm, and the safe damage angle is 36 degrees. In addition, the process flow of the armor piece prepared by the extrusion and friction stir welding process is simple, the cost is reduced, and the method is beneficial to industrial production.
Drawings
FIG. 1 is a metallographic photograph of an aluminum alloy armor profile obtained in the fourth step of the example.
Detailed Description
The first embodiment is as follows: the aluminum alloy armor part with high weldability and high-speed impact resistance is composed of, by mass, 7.5% -12% of Zn, 0.8% -3.0% of Mg, 1.2% -2.5% of Cu, 0.05% -0.5% of Zr, 0.01% -0.5% of Fe, 0.05% -0.4% of Si and the balance of Al.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: the ratio of the contents of Mg and Cu in the aluminum alloy armor part with high weldability and high-speed impact resistance is 1: (1.5 to 3). The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: the sum of the contents of Si and Zr in the aluminum alloy armor part with high weldability and high-speed impact resistance is 0.15-0.8%. The other is the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: the aluminum alloy armor part with high weldability and high-speed impact resistance is composed of 10% of Zn, 2.0% of Mg, 1.8% of Cu, 0.1% of Zr, 0.02% of Fe, 0.05% of Si and the balance of Al in percentage by mass. The others are the same as in one of the first to third embodiments.
The fifth concrete implementation mode: the method for manufacturing the aluminum alloy armor part with high weldability and high-speed impact resistance according to the embodiment is carried out according to the following steps:
firstly, smelting an intermediate alloy: preparing materials from 7.5-12% of Zn, 0.8-3.0% of Mg, 1.2-2.5% of Cu, 0.05-0.5% of Zr, 0.01-0.5% of Fe, 0.05-0.4% of Si and the balance of Al according to mass percentage to obtain metal to be smelted, wherein Zn adopts a zinc ingot, and Mg, Cu, Zr, Fe and Si adopt intermediate alloy; the rest Al is pure aluminum ingot; meanwhile, 0.08-0.2% of refining agent and 0.05-0.07% of alterant are weighed according to the total mass of the metal to be smelted; setting the furnace gas temperature to 850-900 ℃, sequentially adding prepared zinc ingots and intermediate alloys into a smelting furnace from large to small according to the block weight and size, stirring the melt at a rotating speed of 250-350 r/min for 10-20 min, keeping the temperature for 2h, raising the furnace gas temperature to 920-950 ℃ to obtain an alloy melt, and keeping the temperature for later use;
smelting and pouring: under the protection of inert atmosphere, melting a pure aluminum ingot at the temperature of 700-800 ℃ to obtain pure aluminum liquid, preserving heat for 1-2 h, then raising the temperature of the pure aluminum liquid to 850-900 ℃, and preserving heat for later use; adding the alloy melt into pure aluminum liquid, adding a refining agent, refining for 15-30 min, adding a modifier, stirring at a rotating speed of 450-600 r/min for 30-40 min to obtain an alloy melt, keeping the temperature for 2-3h, and adding the alloy solution into a casting machine at the temperature of 800-850 ℃ to obtain an aluminum alloy ingot;
thirdly, extrusion forming: respectively preheating the aluminum alloy cast ingot and an extruder, and controlling the extrusion speed to obtain an aluminum alloy section required by the high-performance armored piece;
fourthly, heat treatment: carrying out heat treatment on the aluminum alloy section required by the high-performance armored piece to obtain an aluminum alloy armored piece section;
fifthly, welding: and connecting the parts to be welded by adopting a friction stir welding process to obtain the welded aluminum alloy armor structural member.
The elemental content ratio of Mg and Cu in the elemental composition of the aluminum alloy according to the present embodiment should be in the range of 1: (1.5-3), on the one hand, the content of Mg and Cu is to ensure that enough MgZn is formed in the alloy2And Al2The Cu precipitated phase ensures a sufficient strengthening effect, and on the other hand, is also intended to control the formation of a precipitated phase between Mg and Cu, which is detrimental to the weldability of the alloy.
The sixth specific implementation mode: the fifth embodiment is different from the fifth embodiment in that: in the first step, the content ratio of Mg to Cu is 1: (1.5 to 3). The rest is the same as the fifth embodiment.
The seventh embodiment: the fifth or sixth embodiment is different from the fifth or sixth embodiment in that: and step three, in the extrusion forming process, the preheating temperature of the aluminum alloy ingot and the preheating temperature of the extrusion cylinder are 480-500 ℃, and the extrusion speed is 0.5-0.8 mm/s. The other is the same as the fifth or sixth embodiment.
The extrusion speed of the embodiment needs to be 0.5-0.8 mm/s, and the control of the extrusion speed has two main purposes, so that on one hand, the proper extrusion speed is beneficial to reducing the abrasion of the alloy to the die, and the production cost is effectively reduced; on the other hand, the extrusion speed actually represents the deformation rate of the aluminum alloy at the extrusion port, and the alloy structure formed under the condition of proper deformation rate is very beneficial to the distribution state of precipitated phases in the heat treatment process of the alloy, so that the subsequent welding performance is improved.
The specific implementation mode is eight: the difference between this embodiment mode and one of the fifth to seventh embodiment modes is that: the heat treatment parameters in the fourth step are as follows: heating to 480-520 ℃ at a heating rate of 2-3 ℃/min, preserving heat for 30-60 min, and air cooling to below 100 ℃; heating to 460-480 ℃ at the heating rate of 4-6 ℃/min, and keeping the temperature for 5-10 min; water quenching, followed by natural aging for over 48 hours. The rest is the same as one of the fifth to seventh embodiments.
The heat treatment process of the present embodiment is: heating to 480-520 ℃ at a heating rate of 2-3 ℃/min, preserving heat for 30-60 min, and air cooling to below 100 ℃; heating to 460-480 ℃ at the heating rate of 4-6 ℃/min, and keeping the temperature for 5-10 min; water quenching, and then naturally aging for more than 48 hours; the purpose of the heat treatment process is to ensure that two precipitated phases of Mg2Zn and Al2Cu are uniformly and dispersedly distributed, so that the alloy has excellent mechanical property and welding property.
The specific implementation method nine: the present embodiment differs from the fifth to eighth embodiment in that: in the friction stir welding process, the rotating speed of a welding head is 650-750 r/min, and the moving speed of the welding head is 70-80 mm/min. The rest is the same as the fifth to eighth embodiments.
In the friction stir welding process of the embodiment, the rotating speed of a welding head is 650-750 r/min, and the moving speed of the welding head is 70-80 mm/min. The main purpose of controlling the welding process parameters is to control the heat productivity of the welding head position and reduce the heat affected zone on the premise of ensuring the welding strength. Meanwhile, cooling is carried out within 15s after welding is finished, the cooling mode is water cooling, and the main purpose is to prevent the welding position from being too high in temperature and influencing the welding performance.
The detailed implementation mode is ten: the present embodiment differs from one of the fifth to ninth embodiments in that: and fifthly, cooling the welding area within 15s after the friction stir welding process is completed, wherein the cooling mode is water cooling. The others are the same as in one of the fifth to ninth embodiments.
The effects of the present invention were verified by the following tests:
the first embodiment is as follows: the manufacturing method of the aluminum alloy armor part with high weldability and high-speed impact resistance is specifically carried out according to the following steps:
firstly, smelting an intermediate alloy: preparing materials according to the mass percent of 7.5% of Zn, 1.0% of Mg, 2.5% of Cu, 0.09% of Zr, 0.02% of Fe, 0.07% of Si and the balance of Al to obtain metal to be smelted, wherein Zn adopts a zinc ingot, and Mg, Cu, Zr, Fe and Si adopt intermediate alloys; the rest Al is pure aluminum ingot; simultaneously weighing 0.1 percent of refining agent and 0.05 percent of alterant according to the total mass of the metal to be smelted; setting the furnace gas temperature to 900 ℃, sequentially adding prepared zinc ingots and intermediate alloys into a smelting furnace from large to small according to the block weight and size, stirring the melt at the rotating speed of 350r/min for 120min, keeping the temperature for 2h, raising the furnace gas temperature to 920 ℃, obtaining an alloy melt, and keeping the temperature for later use;
secondly, smelting and pouring aluminum liquid: under the protection of inert atmosphere, melting a pure aluminum ingot at the temperature of 750 ℃ to obtain pure aluminum liquid, preserving heat for 2 hours, then raising the temperature of the pure aluminum liquid to 870 ℃, and preserving heat for later use; adding the alloy melt into pure aluminum liquid, adding a refining agent, refining for 30min, adding a modifier, stirring at the rotating speed of 450r/min for 40min to obtain an alloy melt, keeping the temperature for 2h, and adding the alloy solution into a casting machine at the temperature of 850 ℃ to obtain an aluminum alloy ingot;
thirdly, extrusion forming: respectively preheating the aluminum alloy cast ingot and an extruder, wherein the preheating temperature is 490 ℃, and the extrusion speed is controlled to be 0.6mm/s, so as to obtain an aluminum alloy extrusion material required by a high-performance armored piece;
fourthly, heat treatment: the aluminum alloy extruded material required by the high-performance armored piece is subjected to heat treatment to obtain the aluminum alloy armored piece section, and the heat treatment process comprises the following steps: heating to 520 ℃ at a heating rate of 3 ℃/min, keeping the temperature for 45min, and cooling in air to below 100 ℃; heating to 480 ℃ again at the heating rate of 6 ℃/min, and keeping the temperature for 5 min; water quenching, and then naturally aging for 60 h;
fifthly, welding: connecting parts to be welded by adopting a friction stir welding process to obtain a welded aluminum alloy armor structural member; the rotating speed of a welding head in the friction stir welding is 700r/min, the moving speed of the welding head is 80mm/min, and water cooling is carried out 12s after the welding.
FIG. 1 is a metallographic photograph of an aluminum alloy ingot obtained in the fourth step of the example. It can be seen from the figure that fine and dispersed precipitated phases are formed inside the aluminum alloy grains after the heat treatment, and the existence of the precipitated phases in the form is very beneficial to the subsequent welding performance, thus the proper heat treatment process is necessary for the aluminum alloy.
Example two: the difference between this example and the first example is that the Mg content is 2%, the Cu content is 1.8%, and the rest is the same as the first example.
Example three: the difference between this example and the first example is that the extrusion speed in the third step is 1.5mm/s, and the rest is the same as the first example.
Example four: the difference between the embodiment and the embodiment I is that the heat treatment process in the step IV is to heat up to 520 ℃ at a heating rate of 3 ℃/min, preserve the temperature for 45min, quench in water and then naturally age for 24 h. The rest is the same as the first embodiment.
Example five: the difference between the embodiment and the first embodiment is that the rotating speed of the welding head is 800r/min, the moving speed of the welding head is 60mm/min, and water cooling is not carried out.
The mechanical properties, welding properties and protective properties of the aluminum alloy sections prepared in the first to fifth examples were respectively tested, and the results are shown in table 1.
From the above results, it is clear that: the aluminum alloy armored part profile obtained in the first embodiment has excellent anti-telltale impact characteristics and excellent welding performance, and shows the superiority of the preparation method of the aluminum alloy armored part. The comparison of the performance test results of the first and second examples shows that: after the element proportion of Cu and Mg alloy is changed, the mechanical property of the alloy is obviously reduced, and meanwhile, the welding strength is also obviously reduced. The comparison of the performance test results of the first and third examples shows that: improper extrusion speed cannot guarantee the surface quality of the alloy profile, and simultaneously, the mechanical property, the welding property and the protective property of the alloy profile are obviously reduced. The comparison of the performance test results of the first and fourth examples shows that: the technological parameters of the heat treatment process are changed, the mechanical property of the section is not greatly influenced, but the precipitation behavior and the distribution state of the strengthening phase in the alloy are changed, and therefore the welding strength is obviously reduced. Comparison of the performance test results of examples one and five shows that: the welding performance is obviously reduced under the technological parameters, and the main reason is that the heat affected zone of the welding position is enlarged, the distribution and the form of a strengthening phase in the welding area are obviously changed, and finally the welding performance is obviously reduced.
The high-performance 7XXX series aluminum alloy is prepared by adjusting the components and the content of alloy elements and combining a hot extrusion process and a heat treatment process, so that the alloy has excellent mechanical properties; meanwhile, the alloy has excellent welding performance by matching with a friction stir welding process; in addition, the armor piece is prepared by one-step molding through a reasonable extrusion process, and has excellent anti-collision performance. The method not only realizes the preparation of the high-performance armor 7XXX series aluminum alloy, but also forms the aluminum alloy section required by the armor piece in one step, and the armor piece has excellent welding performance, thereby greatly expanding the application potential of the armor piece in the armor protection field; the preparation method has simple process, saves cost and promotes the renewal of the aluminum alloy armor parts.
Claims (2)
1. The manufacturing method of the aluminum alloy armor piece with high weldability and high-speed impact resistance is characterized in that the manufacturing method of the aluminum alloy armor piece with high weldability and high-speed impact resistance is carried out according to the following steps:
firstly, smelting an intermediate alloy: preparing materials from 10-12% of Zn, 2.0-3.0% of Mg, 1.8-2.5% of Cu, 0.1-0.5% of Zr, 0.02-0.5% of Fe, 0.05-0.4% of Si and the balance of Al according to mass percentage to obtain metal to be smelted, wherein Zn adopts a zinc ingot, and Mg, Cu, Zr, Fe and Si adopt intermediate alloy; the rest Al is pure aluminum ingot; meanwhile, 0.08-0.2% of refining agent and 0.05-0.07% of alterant are weighed according to the total mass of the metal to be smelted; setting the furnace gas temperature to 850-900 ℃, sequentially adding prepared zinc ingots and intermediate alloys into a smelting furnace from large to small according to the block weight and size, stirring the melt at a rotating speed of 250-350 r/min for 10-20 min, keeping the temperature for 2h, raising the furnace gas temperature to 920-950 ℃ to obtain an alloy melt, and keeping the temperature for later use;
smelting and pouring: under the protection of inert atmosphere, melting a pure aluminum ingot at the temperature of 700-800 ℃ to obtain pure aluminum liquid, preserving heat for 1-2 h, then raising the temperature of the pure aluminum liquid to 850-900 ℃, and preserving heat for later use; adding the alloy melt into pure aluminum liquid, adding a refining agent, refining for 15-30 min, adding a modifier, stirring at a rotating speed of 450-600 r/min for 30-40 min to obtain an alloy melt, keeping the temperature for 2-3h, and adding the alloy solution into a casting machine at the temperature of 800-850 ℃ to obtain an aluminum alloy ingot;
thirdly, extrusion forming: respectively preheating the aluminum alloy cast ingot and an extruder, and controlling the extrusion speed to obtain an aluminum alloy section required by the high-performance armored piece;
fourthly, heat treatment: carrying out heat treatment on the aluminum alloy section required by the high-performance armored piece to obtain an aluminum alloy armored piece section; the heat treatment parameters are as follows: heating to 480-520 ℃ at a heating rate of 2-3 ℃/min, preserving heat for 30-60 min, and air cooling to below 100 ℃; heating to 460-480 ℃ at the heating rate of 4-6 ℃/min, and keeping the temperature for 5-10 min; water quenching, and then naturally aging for more than 48 hours;
fifthly, welding: connecting parts to be welded by adopting a friction stir welding process to obtain a welded aluminum alloy armor structural member; in the friction stir welding process, the rotating speed of a welding head is 650-750 r/min, and the moving speed of the welding head is 70-80 mm/min; and cooling the welding area within 15s after the friction stir welding process is finished, wherein the cooling mode is water cooling.
2. The method for manufacturing the aluminum alloy armored piece with high weldability and high-speed impact resistance according to claim 1, wherein in the extrusion molding process in the third step, the preheating temperature of the aluminum alloy ingot and the extrusion cylinder is 480-500 ℃, and the extrusion speed is 0.5-0.8 mm/s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911018779.9A CN110629085B (en) | 2019-10-24 | 2019-10-24 | High-weldability aluminum alloy armor part with high-speed impact resistance and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911018779.9A CN110629085B (en) | 2019-10-24 | 2019-10-24 | High-weldability aluminum alloy armor part with high-speed impact resistance and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110629085A CN110629085A (en) | 2019-12-31 |
| CN110629085B true CN110629085B (en) | 2020-10-20 |
Family
ID=68977452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911018779.9A Active CN110629085B (en) | 2019-10-24 | 2019-10-24 | High-weldability aluminum alloy armor part with high-speed impact resistance and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110629085B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8673209B2 (en) * | 2007-05-14 | 2014-03-18 | Alcoa Inc. | Aluminum alloy products having improved property combinations and method for artificially aging same |
| US8206517B1 (en) * | 2009-01-20 | 2012-06-26 | Alcoa Inc. | Aluminum alloys having improved ballistics and armor protection performance |
| CN102108463B (en) * | 2010-01-29 | 2012-09-05 | 北京有色金属研究总院 | Aluminium alloy product suitable for manufacturing structures and preparation method |
| CN102581470A (en) * | 2012-03-01 | 2012-07-18 | 江苏科技大学 | Friction stir welding weld set for spray forming of Al (aluminum)-Zn (zinc)-Mg (magnesium)-Cu (copper) aluminum alloy |
| CN105238972A (en) * | 2015-10-23 | 2016-01-13 | 中国航空工业集团公司北京航空材料研究院 | Preparation method for novel light-weight and high-strength protection armor plate |
| CN105401021A (en) * | 2015-10-29 | 2016-03-16 | 中国航空工业集团公司北京航空材料研究院 | Aluminum alloy extruded sectional material at grade of 700 MPa |
| CN105331859A (en) * | 2015-10-29 | 2016-02-17 | 中国航空工业集团公司北京航空材料研究院 | Preparing method for 700-MPa-level aluminum alloy extruded section |
-
2019
- 2019-10-24 CN CN201911018779.9A patent/CN110629085B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110629085A (en) | 2019-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102796925B (en) | High-strength die-casting aluminum alloy for pressure casting | |
| CN106350716B (en) | A kind of high intensity appearance member aluminum alloy materials and preparation method thereof | |
| CN110423927A (en) | A kind of Ultrahigh strength aluminum lithium alloy and preparation method thereof | |
| CN102943193B (en) | Grain refinement machining process of hard aluminium alloy cast ingot | |
| CN103667825B (en) | A kind of ultra-high-strength/tenacity anticorodal and manufacture method thereof | |
| CN114717455B (en) | Heat-treatment-free high-strength and high-toughness die-casting aluminum alloy and preparation method thereof | |
| EP2471967B1 (en) | Method for obtaining improved mechanical properties in recycled aluminium castings free of platelet-shaped beta-phases | |
| EP1882753A1 (en) | Aluminium alloy | |
| CN108251714B (en) | Extrusion casting high-strength and high-toughness aluminum alloy and extrusion casting method thereof | |
| CN104032195B (en) | Efficiently-extrudable low-cost high-performance heat-conducting magnesium alloy and preparation method thereof | |
| CN104018038A (en) | Aluminium alloy used for automobile anti-collision beam, and manufacturing method for product thereof | |
| CN111411274B (en) | High-strength heat-conducting aluminum alloy material and preparation method thereof | |
| CN111440974B (en) | High-strength aluminum alloy and manufacturing method thereof | |
| CN111270115A (en) | Method for manufacturing high-strength 7000 series aluminum alloy section for automobile body | |
| CN110079712A (en) | As cast condition high-ductility diecasting aluminum-silicon alloy and its preparation method and application | |
| CN110964958A (en) | Al-Zn-Mg-Cu alloy and preparation process thereof | |
| CN102965553A (en) | Aluminum alloy cast ingot for automotive bumper and production process thereof | |
| CN102965554B (en) | Hard aluminum alloy cast ingot | |
| CN113106306A (en) | High-strength corrosion-resistant 5xxx series alloy and preparation method thereof | |
| CN112126828A (en) | High-mechanical-property and high-fluidity die-casting aluminum alloy for automobile structural part and preparation method and application thereof | |
| CN110629085B (en) | High-weldability aluminum alloy armor part with high-speed impact resistance and manufacturing method thereof | |
| CN115433859B (en) | Modification method of deformed aluminum alloy based on rare earth alloy | |
| KR102539804B1 (en) | Aluminum alloys and methods of making the same | |
| CN114525437A (en) | Corrosion-resistant high-performance magnesium alloy with low alloy content and preparation method thereof | |
| CN114703409A (en) | High-strength corrosion-resistant aluminum alloy and casting method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: The invention relates to an aluminum alloy armor with high weldability and anti high-speed impact characteristics and a manufacturing method thereof Effective date of registration: 20210916 Granted publication date: 20201020 Pledgee: China Exim Bank Fujian branch Pledgor: FUJIAN XIANGXIN SHARES Co.,Ltd. Registration number: Y2021350000112 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220923 Granted publication date: 20201020 Pledgee: China Exim Bank Fujian branch Pledgor: FUJIAN XIANGXIN SHARES Co.,Ltd. Registration number: Y2021350000112 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Aluminum alloy armor with high weldability and high-speed impact resistance and its manufacturing method Effective date of registration: 20220923 Granted publication date: 20201020 Pledgee: China Exim Bank Fujian branch Pledgor: FUJIAN XIANGXIN SHARES Co.,Ltd. Registration number: Y2022350000122 |