CN114369747A - Aluminum alloy strip stiffened plate for ship and extrusion process thereof - Google Patents
Aluminum alloy strip stiffened plate for ship and extrusion process thereof Download PDFInfo
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- CN114369747A CN114369747A CN202210016331.9A CN202210016331A CN114369747A CN 114369747 A CN114369747 A CN 114369747A CN 202210016331 A CN202210016331 A CN 202210016331A CN 114369747 A CN114369747 A CN 114369747A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- 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
- B21C23/001—Extruding metal; Impact extrusion to improve the material properties, e.g. lateral extrusion
-
- 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
- B21C23/002—Extruding materials of special alloys so far as the composition of the alloy requires or permits special extruding methods of sequences
-
- 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
- B21C23/005—Continuous extrusion starting from solid state material
-
- 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
- B21C23/02—Making uncoated products
- B21C23/04—Making uncoated products by direct extrusion
- B21C23/06—Making sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/005—Casting ingots, e.g. from ferrous metals from non-ferrous metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
-
- 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
- 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
- C22F1/043—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent
Abstract
The invention relates to the technical field of aluminum alloy, and discloses an aluminum alloy strip stiffened plate for ships and an extrusion process thereof, wherein the aluminum alloy strip stiffened plate for the ships comprises a strip stiffened plate, and the strip stiffened plate comprises aluminum alloy and an additive; the aluminum alloy includes: silicon Si: 23.2 parts, copper Cu: 3.8-4.9 parts of magnesium Mg: 1.2-1.8 parts of manganese Mn: 0.3-0.9 parts of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the balance; the additive comprises: fe: 0.5 part. In the present invention, in order to prevent the occurrence of extrusion cracks, the extrusion speed should be gradually decreased as the extrusion process proceeds and the temperature of the deformation region is increased. After the section bar is discharged from the die hole, a tractor is generally adopted for traction, when the tractor works, the tractor can provide certain traction tension for an extruded product and synchronously move with the outflow speed of the product, the tractor is used for reducing the uneven length and smearing during multi-line extrusion, and simultaneously preventing the section bar from being twisted and bent after being discharged from the die hole, thereby bringing troubles to tension straightening and achieving the effect of improving the yield.
Description
Technical Field
The invention relates to the technical field of aluminum alloy, in particular to an aluminum alloy strip stiffening plate for ships and an extrusion process thereof.
Background
Ships are a general term for various ships. Ships are vehicles which can be sailed or moored in water for transportation or operation, and have different technical performances, equipment and structural forms according to different use requirements. A ship is a man-made vehicle that operates primarily in geographic water. In addition, a civil ship is generally called a ship, a military ship is called a ship, and a small-sized ship is called a boat or a boat, which is collectively called a ship or a boat. The interior mainly comprises a containment space, a support structure and a drainage structure, with a propulsion system using an external or self-contained energy source. The appearance is generally favorable for overcoming the streamline envelope of the fluid resistance, the materials are continuously updated along with the technological progress, the early materials are natural materials such as wood, bamboo, hemp and the like, and the modern materials are mostly steel, aluminum, glass fiber, acrylic and various composite materials.
In the existing aluminum alloy extrusion process in the market at present, because the aluminum alloy cast ingot is continuously extruded by the die, the temperature of the surface of the aluminum alloy can be increased after the aluminum alloy is extruded, and the contact end of the aluminum alloy and the die is easy to twist and bend due to the shape of the die.
To this end, we propose aluminium alloy strip stiffened panels for ships and extrusion processes thereof.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art and provides an aluminum alloy strip stiffened plate for ships and an extrusion process thereof.
In order to achieve the purpose, the invention adopts the following technical scheme that the aluminum alloy stiffened plate for the ship comprises a stiffened plate, wherein the stiffened plate comprises aluminum alloy and an additive;
the aluminum alloy includes: silicon Si: 23.2 parts, copper Cu: 3.8-4.9 parts of magnesium Mg: 1.2-1.8 parts of manganese Mn: 0.3-0.9 parts of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the balance;
the additive comprises: fe: 0.5 part.
The extrusion process of the aluminum alloy ribbed plate for the ship comprises the following steps:
the first step is as follows: smelting;
the second step is that: adding a melt;
the third step: casting;
the fourth step: heating the cast ingot;
the fifth step: hot rolling;
and a sixth step: quenching;
the seventh step: and (6) straightening tension.
Preferably, in the first step, the silicon Si: 23.2 parts, copper Cu: 3.8-4.9 parts of magnesium Mg: 1.2-1.8 parts of manganese Mn: 0.3-0.9 parts of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: and pouring the rest of the materials into a smelting machine for smelting treatment.
Preferably, in the second step, in the process of smelting the aluminum alloy material, an additive is added into the solution, and the additive reacts with the aluminum alloy material, so that the stability of the aluminum alloy is improved.
Preferably, in the third step, the melted aluminum alloy is poured into a mold, a casting operation is performed, and after the aluminum alloy is cooled, the mold is opened, and the aluminum alloy ingot is taken out.
Preferably, in the fourth step, the ingot is placed into a heating furnace, the temperature of the heating furnace is set to 460-520 ℃, the ingot is heated for 10 minutes, and after the ingot is homogenized, the temperature of the heating furnace is adjusted to 430-480 ℃.
Preferably, in the fifth step, the heated ingot is placed into an extruder, the ingot is pushed into a mold through a push rod of the extruder, and the push rod pushes the ingot at a speed of 20m/mind, so that the ingot is extruded and deformed.
Preferably, in the sixth step, the extruded aluminum alloy plate penetrates through the die and extends to the outside of the die, and the fan is controlled to blow the airflow generated by the fan on the surface of the molded aluminum alloy plate.
Preferably, in the seventh step, the aluminum alloy plate is subjected to a certain traction tension by the traction machine, and the moving speed of the traction machine is controlled to be the same as that of the push rod until the push rod pushes out the cast ingot completely.
Advantageous effects
The invention provides an aluminum alloy strip stiffened plate for ships and an extrusion process thereof. The method has the following beneficial effects:
(1) the aluminum alloy strip stiffening plate for the ship and the extrusion process thereof have the advantage that the extrusion temperature is adjusted according to different products and unit pressure during operation. During extrusion, the temperature of the ingot in the deformation zone is varied and increases with increasing extrusion speed. In order to prevent the occurrence of extrusion cracks, the extrusion speed should be gradually reduced as the extrusion process proceeds and the temperature of the deformation zone is increased. After the section bar is discharged from the die hole, a tractor is generally adopted for traction, and when the tractor works, the tractor gives a certain traction tension to the extruded product and synchronously moves with the product discharge speed. The tractor is used for reducing uneven length and smearing during multi-line extrusion, preventing the profile from twisting and bending after being discharged from a die hole, bringing troubles to tension straightening and achieving the effect of improving the yield.
(2) According to the aluminum alloy strip stiffened plate for the ship and the extrusion process thereof, the aluminum alloy cast ingot is extruded to be extruded, the aluminum alloy is extruded and molded, the deformation capacity of metal is improved by extruding the aluminum alloy, the metal is in a strong three-dimensional compressive stress state in an extrusion deformation area, the plasticity of the metal can be fully exerted, a large deformation amount is obtained, and the effect of conveniently processing the aluminum alloy is achieved.
(3) The aluminum alloy strip stiffening plate for the ship and the extrusion process thereof can improve the structure of a metal material and improve the mechanical property of the metal material through extrusion deformation, and particularly for some aluminum alloys with extrusion effect, the longitudinal (extrusion direction) mechanical property of the extruded product is far higher than that of similar products produced by other processing methods after quenching and aging. For some materials which need to be processed by rolling and forging, the structure of the material is improved, and the plasticity of the material is improved. Compared with the processing methods such as rolling, forging and the like, the extrusion product has high dimensional precision and good surface quality. With the progress of the extrusion technology, the improvement of the process level and the progress of the die design and manufacturing technology, the effect of improving the comprehensive quality of the aluminum alloy plate is achieved.
(4) The aluminum alloy strip stiffened plate for the ship and the extrusion process thereof can not only produce pipes, rods and wires with simple section shapes, but also produce solid and hollow sections with very complicated section shapes and variable section sections with the section of the product changing in stages and gradually along the length direction, have very wide size range of the extruded products, and reach the effect of improving the product range by extrusion molding from ultra-large pipes and sections with the section circumcircle diameter of 500 plus one-tenth 1000mm to ultra-small precise sections with the section size of like a match rod.
(5) The aluminum alloy strip stiffened plate for the ship and the extrusion process thereof have great flexibility in extrusion processing, products with different shapes, sizes and varieties can be produced on the same equipment only by replacing the die, the operation of replacing the die is simple and convenient, the time is short, the efficiency is high, and the effect of improving the flexibility of production is achieved.
Detailed Description
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: the aluminum alloy strip stiffened plate for the ship comprises a strip stiffened plate, wherein the strip stiffened plate comprises an aluminum alloy and an additive.
The aluminum alloy includes: silicon Si: 23.2 parts, copper Cu: 3.8 parts of magnesium Mg: 1.2 parts, Mn: 0.3 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the balance;
the additive comprises: fe: 0.5 part.
The extrusion process of the aluminum alloy ribbed plate for the ship comprises the following steps:
the first step is as follows: smelting, selecting silicon Si: 23.2 parts, copper Cu: 3.8 parts of magnesium Mg: 1.2 parts, Mn: 0.3 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the rest is that the materials are poured into a smelting machine for smelting treatment;
the second step is that: adding an additive into the solution during the smelting process of the aluminum alloy material, and reacting the aluminum alloy material through the additive to improve the stability of the aluminum alloy;
the third step: casting, pouring the smelted aluminum alloy into a mold, performing casting operation, opening the grinding tool after the aluminum alloy is cooled, and taking out an aluminum alloy ingot;
the fourth step: heating the ingot, namely putting the ingot into a heating furnace, setting the temperature of the heating furnace at 460-480 ℃, heating the ingot for 10 minutes, and adjusting the temperature of the heating furnace to be 430-480 ℃ after the ingot is homogenized;
the fifth step: hot rolling, namely putting the heated cast ingot into an extruder, pushing the cast ingot into a mold through a push rod of the extruder, and pushing the cast ingot by the push rod at the speed of 20m/mind so that the cast ingot is extruded and deformed;
and a sixth step: quenching, wherein the extruded aluminum alloy plate extends to the outside of the die through the die, and a fan is controlled to blow airflow generated by the fan to the surface of the molded aluminum alloy plate;
the seventh step: and (4) straightening tension, namely, providing a certain traction tension for the aluminum alloy plate through a tractor, and controlling the moving speed of the tractor to be the same as the speed of the push rod until the push rod pushes out all the cast ingots.
Example two: the aluminum alloy strip stiffened plate for the ship comprises a strip stiffened plate, wherein the strip stiffened plate comprises an aluminum alloy and an additive.
The aluminum alloy includes: silicon Si: 23.2 parts, copper Cu: 4.9 parts of magnesium Mg: 1.8 parts, Mn: 0.9 part, chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the balance;
the additive comprises: fe: 0.5 part.
The extrusion process of the aluminum alloy ribbed plate for the ship comprises the following steps:
the first step is as follows: smelting, selecting silicon Si: 23.2 parts, copper Cu: 4.9 parts of magnesium Mg: 1.8 parts, Mn: 0.9 part, chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the rest is that the materials are poured into a smelting machine for smelting treatment;
the second step is that: adding an additive into the solution during the smelting process of the aluminum alloy material, and reacting the aluminum alloy material through the additive to improve the stability of the aluminum alloy;
the third step: casting, pouring the smelted aluminum alloy into a mold, performing casting operation, opening the grinding tool after the aluminum alloy is cooled, and taking out an aluminum alloy ingot;
the fourth step: heating the ingot, namely putting the ingot into a heating furnace, setting the temperature of the heating furnace at 460-480 ℃, heating the ingot for 10 minutes, and adjusting the temperature of the heating furnace to be 430-480 ℃ after the ingot is homogenized;
the fifth step: hot rolling, namely putting the heated cast ingot into an extruder, pushing the cast ingot into a mold through a push rod of the extruder, and pushing the cast ingot by the push rod at the speed of 20m/mind so that the cast ingot is extruded and deformed;
and a sixth step: quenching, wherein the extruded aluminum alloy plate extends to the outside of the die through the die, and a fan is controlled to blow airflow generated by the fan to the surface of the molded aluminum alloy plate;
the seventh step: and (4) straightening tension, namely, providing a certain traction tension for the aluminum alloy plate through a tractor, and controlling the moving speed of the tractor to be the same as the speed of the push rod until the push rod pushes out all the cast ingots.
Example three: the aluminum alloy strip stiffened plate for the ship comprises a strip stiffened plate, wherein the strip stiffened plate comprises an aluminum alloy and an additive.
The aluminum alloy includes: silicon Si: 23.2 parts, copper Cu: 4.0 parts of magnesium Mg: 1.5 parts, Mn: 0.7 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the balance;
the additive comprises: fe: 0.5 part.
The extrusion process of the aluminum alloy ribbed plate for the ship comprises the following steps:
the first step is as follows: smelting, selecting silicon Si: 23.2 parts, copper Cu: 4.0 parts of magnesium Mg: 1.5 parts, Mn: 0.7 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the rest is that the materials are poured into a smelting machine for smelting treatment;
the second step is that: adding an additive into the solution during the smelting process of the aluminum alloy material, and reacting the aluminum alloy material through the additive to improve the stability of the aluminum alloy;
the third step: casting, pouring the smelted aluminum alloy into a mold, performing casting operation, opening the grinding tool after the aluminum alloy is cooled, and taking out an aluminum alloy ingot;
the fourth step: heating the ingot, namely putting the ingot into a heating furnace, setting the temperature of the heating furnace at 460-480 ℃, heating the ingot for 10 minutes, and adjusting the temperature of the heating furnace to be 430-480 ℃ after the ingot is homogenized;
the fifth step: hot rolling, namely putting the heated cast ingot into an extruder, pushing the cast ingot into a mold through a push rod of the extruder, and pushing the cast ingot by the push rod at the speed of 20m/mind so that the cast ingot is extruded and deformed;
and a sixth step: quenching, wherein the extruded aluminum alloy plate extends to the outside of the die through the die, and a fan is controlled to blow airflow generated by the fan to the surface of the molded aluminum alloy plate;
the seventh step: and (4) straightening tension, namely, providing a certain traction tension for the aluminum alloy plate through a tractor, and controlling the moving speed of the tractor to be the same as the speed of the push rod until the push rod pushes out all the cast ingots.
Example four: the aluminum alloy strip stiffened plate for the ship comprises a strip stiffened plate, wherein the strip stiffened plate comprises an aluminum alloy and an additive.
The aluminum alloy includes: silicon Si: 23.2 parts, copper Cu: 4.7 parts of magnesium Mg: 1.5 parts, Mn: 0.6 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the balance;
the additive comprises: fe: 0.5 part.
The extrusion process of the aluminum alloy ribbed plate for the ship comprises the following steps:
the first step is as follows: smelting, selecting silicon Si: 23.2 parts, copper Cu: 4.7 parts of magnesium Mg: 1.5 parts, Mn: 0.6 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the rest is that the materials are poured into a smelting machine for smelting treatment;
the second step is that: adding an additive into the solution during the smelting process of the aluminum alloy material, and reacting the aluminum alloy material through the additive to improve the stability of the aluminum alloy;
the third step: casting, pouring the smelted aluminum alloy into a mold, performing casting operation, opening the grinding tool after the aluminum alloy is cooled, and taking out an aluminum alloy ingot;
the fourth step: heating the ingot, namely putting the ingot into a heating furnace, setting the temperature of the heating furnace at 460-480 ℃, heating the ingot for 10 minutes, and adjusting the temperature of the heating furnace to be 430-480 ℃ after the ingot is homogenized;
the fifth step: hot rolling, namely putting the heated cast ingot into an extruder, pushing the cast ingot into a mold through a push rod of the extruder, and pushing the cast ingot by the push rod at the speed of 20m/mind so that the cast ingot is extruded and deformed;
and a sixth step: quenching, wherein the extruded aluminum alloy plate extends to the outside of the die through the die, and a fan is controlled to blow airflow generated by the fan to the surface of the molded aluminum alloy plate;
the seventh step: and (4) straightening tension, namely, providing a certain traction tension for the aluminum alloy plate through a tractor, and controlling the moving speed of the tractor to be the same as the speed of the push rod until the push rod pushes out all the cast ingots.
Example five: the aluminum alloy strip stiffened plate for the ship comprises a strip stiffened plate, wherein the strip stiffened plate comprises an aluminum alloy and an additive.
The aluminum alloy includes: silicon Si: 23.2 parts, copper Cu: 4.2 parts of magnesium Mg: 1.7 parts, Mn: 0.4 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the balance;
the additive comprises: fe: 0.5 part.
The extrusion process of the aluminum alloy ribbed plate for the ship comprises the following steps:
the first step is as follows: smelting, selecting silicon Si: 23.2 parts, copper Cu: 4.2 parts of magnesium Mg: 1.7 parts, Mn: 0.4 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the rest is that the materials are poured into a smelting machine for smelting treatment;
the second step is that: adding an additive into the solution during the smelting process of the aluminum alloy material, and reacting the aluminum alloy material through the additive to improve the stability of the aluminum alloy;
the third step: casting, pouring the smelted aluminum alloy into a mold, performing casting operation, opening the grinding tool after the aluminum alloy is cooled, and taking out an aluminum alloy ingot;
the fourth step: heating the ingot, namely putting the ingot into a heating furnace, setting the temperature of the heating furnace at 460-480 ℃, heating the ingot for 10 minutes, and adjusting the temperature of the heating furnace to be 430-480 ℃ after the ingot is homogenized;
the fifth step: hot rolling, namely putting the heated cast ingot into an extruder, pushing the cast ingot into a mold through a push rod of the extruder, and pushing the cast ingot by the push rod at the speed of 20m/mind so that the cast ingot is extruded and deformed;
and a sixth step: quenching, wherein the extruded aluminum alloy plate extends to the outside of the die through the die, and a fan is controlled to blow airflow generated by the fan to the surface of the molded aluminum alloy plate;
the seventh step: and (4) straightening tension, namely, providing a certain traction tension for the aluminum alloy plate through a tractor, and controlling the moving speed of the tractor to be the same as the speed of the push rod until the push rod pushes out all the cast ingots.
Example six: the aluminum alloy strip stiffened plate for the ship comprises a strip stiffened plate, wherein the strip stiffened plate comprises an aluminum alloy and an additive.
The aluminum alloy includes: silicon Si: 23.2 parts, copper Cu: 4.3 parts of magnesium Mg: 1.33 parts, manganese Mn: 0.8 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the balance;
the additive comprises: fe: 0.5 part.
The extrusion process of the aluminum alloy ribbed plate for the ship comprises the following steps:
the first step is as follows: smelting, selecting silicon Si: 23.2 parts, copper Cu: 4.3 parts of magnesium Mg: 1.33 parts, manganese Mn: 0.8 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the rest is that the materials are poured into a smelting machine for smelting treatment;
the second step is that: adding an additive into the solution during the smelting process of the aluminum alloy material, and reacting the aluminum alloy material through the additive to improve the stability of the aluminum alloy;
the third step: casting, pouring the smelted aluminum alloy into a mold, performing casting operation, opening the grinding tool after the aluminum alloy is cooled, and taking out an aluminum alloy ingot;
the fourth step: heating the ingot, namely putting the ingot into a heating furnace, setting the temperature of the heating furnace at 460-480 ℃, heating the ingot for 10 minutes, and adjusting the temperature of the heating furnace to be 430-480 ℃ after the ingot is homogenized;
the fifth step: hot rolling, namely putting the heated cast ingot into an extruder, pushing the cast ingot into a mold through a push rod of the extruder, and pushing the cast ingot by the push rod at the speed of 20m/mind so that the cast ingot is extruded and deformed;
and a sixth step: quenching, wherein the extruded aluminum alloy plate extends to the outside of the die through the die, and a fan is controlled to blow airflow generated by the fan to the surface of the molded aluminum alloy plate;
the seventh step: and (4) straightening tension, namely, providing a certain traction tension for the aluminum alloy plate through a tractor, and controlling the moving speed of the tractor to be the same as the speed of the push rod until the push rod pushes out all the cast ingots.
Example seven: the aluminum alloy strip stiffened plate for the ship comprises a strip stiffened plate, wherein the strip stiffened plate comprises an aluminum alloy and an additive.
The aluminum alloy includes: silicon Si: 23.2 parts, copper Cu: 4.5 parts of magnesium Mg: 1.3 parts, Mn: 0.5 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the balance;
the additive comprises: fe: 0.5 part.
The extrusion process of the aluminum alloy ribbed plate for the ship comprises the following steps:
the first step is as follows: smelting, selecting silicon Si: 23.2 parts, copper Cu: 4.5 parts of magnesium Mg: 1.3 parts, Mn: 0.5 part of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the rest is that the materials are poured into a smelting machine for smelting treatment;
the second step is that: adding an additive into the solution during the smelting process of the aluminum alloy material, and reacting the aluminum alloy material through the additive to improve the stability of the aluminum alloy;
the third step: casting, pouring the smelted aluminum alloy into a mold, performing casting operation, opening the grinding tool after the aluminum alloy is cooled, and taking out an aluminum alloy ingot;
the fourth step: heating the ingot, namely putting the ingot into a heating furnace, setting the temperature of the heating furnace at 460-480 ℃, heating the ingot for 10 minutes, and adjusting the temperature of the heating furnace to be 430-480 ℃ after the ingot is homogenized;
the fifth step: hot rolling, namely putting the heated cast ingot into an extruder, pushing the cast ingot into a mold through a push rod of the extruder, and pushing the cast ingot by the push rod at the speed of 20m/mind so that the cast ingot is extruded and deformed;
and a sixth step: quenching, wherein the extruded aluminum alloy plate extends to the outside of the die through the die, and a fan is controlled to blow airflow generated by the fan to the surface of the molded aluminum alloy plate;
the seventh step: and (4) straightening tension, namely, providing a certain traction tension for the aluminum alloy plate through a tractor, and controlling the moving speed of the tractor to be the same as the speed of the push rod until the push rod pushes out all the cast ingots.
The working principle of the invention is as follows:
in the invention, the extrusion temperature is adjusted according to different products and unit pressure during operation. During extrusion, the temperature of the ingot in the deformation zone is varied and increases with increasing extrusion speed. In order to prevent the occurrence of extrusion cracks, the extrusion speed should be gradually reduced as the extrusion process proceeds and the temperature of the deformation zone is increased. After the section bar is discharged from the die hole, a tractor is generally adopted for traction. The drawing machine is operated to give a certain drawing tension to the extruded product and simultaneously move synchronously with the outflow speed of the product. The tractor is used for reducing uneven length and smearing during multi-line extrusion, preventing the profile from twisting and bending after being discharged from a die hole, bringing troubles to tension straightening and achieving the effect of improving the yield.
According to the invention, the aluminum alloy ingot is extruded to be extruded, the aluminum alloy ingot is extruded to be formed, the deformation capacity of the metal is improved by extruding the aluminum alloy ingot, the metal is in a strong three-dimensional compressive stress state in an extrusion deformation zone, the plasticity of the metal can be fully exerted, a large deformation amount is obtained, and the effect of conveniently processing the aluminum alloy is achieved.
In the invention, the extrusion deformation can improve the structure of the metal material and improve the mechanical property of the metal material, and particularly for some aluminum alloys with extrusion effect, the longitudinal (extrusion direction) mechanical property of the extruded product is far higher than that of similar products produced by other processing methods after quenching and aging. For some materials which need to be processed by rolling and forging, the structure of the material is improved, and the plasticity of the material is improved. Compared with the processing methods such as rolling, forging and the like, the extrusion product has high dimensional precision and good surface quality. With the progress of the extrusion technology, the improvement of the process level and the progress of the die design and manufacturing technology, the effect of improving the comprehensive quality of the aluminum alloy plate is achieved.
The extrusion processing can not only produce pipes, rods and wires with simple section shapes, but also produce solid and hollow sections with very complicated section shapes, variable section sections with the section of the product changing in stages and gradually along the length direction, the size range of the extruded product is very wide, from ultra-large pipes and sections with the section circumcircle diameter of 500 plus 1000mm to ultra-small precise sections with the section size of the match rod, and the effect of improving the product range is achieved through extrusion forming.
In the invention, the extrusion processing has great flexibility, products with different shapes, sizes, specifications and varieties can be produced on the same equipment only by replacing the die, the operation of replacing the die is simple and convenient, the time consumption is low, the efficiency is high, and the effect of improving the production flexibility is achieved.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. Aluminium alloy strip stiffened plate for boats and ships, including taking the stiffened plate, its characterized in that: the strip includes an aluminum alloy and an additive;
the aluminum alloy includes: silicon Si: 23.2 parts, copper Cu: 3.8-4.9 parts of magnesium Mg: 1.2-1.8 parts of manganese Mn: 0.3-0.9 parts of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: the balance;
the additive comprises: fe: 0.5 part.
2. The extrusion process of the aluminum alloy stiffened plate for the ship is characterized by comprising the following steps of: the method comprises the following steps:
the first step is as follows: smelting;
the second step is that: adding a melt;
the third step: casting;
the fourth step: heating the cast ingot;
the fifth step: hot rolling;
and a sixth step: quenching;
the seventh step: and (6) straightening tension.
3. The extrusion process of an aluminum alloy stiffened plate for a watercraft according to claim 2, wherein: selecting silicon Si in the first step: 23.2 parts, copper Cu: 3.8-4.9 parts of magnesium Mg: 1.2-1.8 parts of manganese Mn: 0.3-0.9 parts of chromium Cr: 0.1 part, zinc Zn: 0.25 part, aluminum Al: and pouring the rest of the materials into a smelting machine for smelting treatment.
4. The extrusion process of an aluminum alloy stiffened plate for a watercraft according to claim 3, wherein: in the second step, in the process of smelting the aluminum alloy material, an additive is added into the solution, and the additive reacts with the aluminum alloy material to improve the stability of the aluminum alloy.
5. The extrusion process of an aluminum alloy stiffened plate for a watercraft according to claim 4, wherein: and in the third step, pouring the smelted aluminum alloy into a mold, performing casting operation, cooling the aluminum alloy, opening the grinding tool, and taking out an aluminum alloy ingot.
6. The extrusion process of an aluminum alloy stiffened plate for a watercraft according to claim 5, wherein: and in the fourth step, the ingot is placed into a heating furnace, the temperature of the heating furnace is set to 460-480 ℃, the ingot is heated for 10 minutes, and the temperature of the heating furnace is adjusted to 430-480 ℃ after the ingot is homogenized.
7. The extrusion process of an aluminum alloy stiffened plate for a watercraft according to claim 6, wherein: and in the fifth step, the heated cast ingot is placed into an extruder, the cast ingot is pushed into a mold through a push rod of the extruder, and the push rod pushes the cast ingot at a speed of 20m/mind, so that the cast ingot is extruded and deformed.
8. The extrusion process of an aluminum alloy stiffened plate for a watercraft according to claim 7, wherein: and in the sixth step, the extruded aluminum alloy plate penetrates through the die and extends to the outside of the die, and the fan is controlled to blow airflow generated by the fan to the surface of the molded aluminum alloy plate.
9. The extrusion process of an aluminum alloy stiffened plate for a watercraft of claim 8, wherein: and in the seventh step, a certain traction tension is given to the aluminum alloy plate through the traction machine, and the moving speed of the traction machine is controlled to be the same as that of the push rod until the push rod pushes out all the cast ingots.
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| JP2011225988A (en) * | 2010-03-31 | 2011-11-10 | Kobe Steel Ltd | Aluminum alloy forged material and method for producing the same |
| CN107747010A (en) * | 2017-10-30 | 2018-03-02 | 辽宁忠旺集团有限公司 | A kind of trailer aluminium alloy wire harness mounting bracket production technology |
| CN110724862A (en) * | 2019-10-24 | 2020-01-24 | 广西南南铝加工有限公司 | Preparation process of aluminum alloy section for ship |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011225988A (en) * | 2010-03-31 | 2011-11-10 | Kobe Steel Ltd | Aluminum alloy forged material and method for producing the same |
| CN107747010A (en) * | 2017-10-30 | 2018-03-02 | 辽宁忠旺集团有限公司 | A kind of trailer aluminium alloy wire harness mounting bracket production technology |
| CN110724862A (en) * | 2019-10-24 | 2020-01-24 | 广西南南铝加工有限公司 | Preparation process of aluminum alloy section for ship |
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Application publication date: 20220419 |