CN111004949B - Aluminum alloy casting method - Google Patents
Aluminum alloy casting method Download PDFInfo
- Publication number
- CN111004949B CN111004949B CN201911197268.8A CN201911197268A CN111004949B CN 111004949 B CN111004949 B CN 111004949B CN 201911197268 A CN201911197268 A CN 201911197268A CN 111004949 B CN111004949 B CN 111004949B
- Authority
- CN
- China
- Prior art keywords
- aluminum alloy
- water
- cooling water
- spraying
- ingot
- 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
-
- 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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/14—Alloys based on aluminium with copper as the next major constituent with silicon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D30/00—Cooling castings, not restricted to casting processes covered by a single main group
-
- 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
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
-
- 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
- C22C21/12—Alloys based on aluminium with copper as the next major constituent
- C22C21/16—Alloys based on aluminium with copper as the next major constituent with magnesium
Abstract
The invention provides an aluminum alloy casting method, which comprises the steps of smelting an ingot containing Al, Mn and Fe into a first melt, adding a zirconium-scandium compound material and trace elements to form a second melt, and reducing Al-Al in the melt on the whole3Sc eutectic point component and can also replace Al-Al3Part of Sc atoms in the Sc particles form Al-Al3The Sc1-xZrx particles can effectively improve the tensile strength, yield strength and elongation of the aluminum alloy, and can promote the uniformity and stability of the melt state by combining ultrasonic-assisted melting; in addition, carry out the synergism through setting up sprinkler system to the ingot casting, can catch the condition of generating heat of ingot casting accurately, obtain more accurate cooling water and spray the volume, spray the direction through direction sensor to the cooling water and regulate and control, solve the condition that the ingot casting appears the bamboo joint easily when the casting, can also reduce the quantity of cooling water, reduction in production cost.
Description
Technical Field
The invention relates to the field of metal smelting, in particular to an aluminum alloy casting method.
Background
The casting is divided into gravity casting and pressure casting according to the pouring process of molten metal. Gravity casting refers to a process of pouring molten metal into a casting mold under the action of earth gravity, and is also called casting. Gravity casting comprises sand casting, metal casting, investment casting, lost foam casting, clay mold casting and the like; pressure casting refers to a process in which molten metal is poured into a mold under the action of other external forces (without gravity). However, in the prior art, the aluminum alloy has the defects that the cast ingot often has bamboo joints in the casting process. The bamboo joints are formed because the shells formed in the early stage are not hard enough and have changed sizes, so that the outer diameters of adjacent parts have different sizes. Casting with inconsistent dimensions easily causes problems in subsequent processing, which affects production quality and efficiency. Even pores are formed and unevenly distributed on the casting, which seriously affects the appearance and quality of the aluminum alloy.
For example, chinese patent No. CN201080008751.8 discloses a method for casting an aluminum alloy containing at least about 0.1% magnesium and/or at least about 0.1% lithium by contacting the liquid surface of the alloy with a dry gas containing at least about 2% by volume oxygen and having a partial pressure of water below about 150Pa during most of the solidification, but with a low cooling efficiency. Also disclosed in patent No. CN201510258738.2 is a method of casting an aluminum alloy comprising the steps of: charge material treatment, charge material preheating, tool cleaning, smelting, pouring and cooling. But the casting cannot accurately control the amount of cooling water, resulting in waste. Further, as disclosed in PCT/CN2012/076106, an aluminum-silicon-magnesium cast aluminum alloy and a casting process thereof improve the tensile strength of the aluminum alloy through cooling and aging treatment, but are energy-consuming in general.
In summary, in the field of aluminum alloy manufacturing, there are many practical problems to be solved in practical applications.
Disclosure of Invention
The present invention proposes a method of casting an aluminum alloy to solve the problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
an aluminum alloy casting method comprising the steps of:
(1) drying an aluminum alloy raw material, wherein furnace washing treatment is needed before adding the aluminum alloy;
(2) according to the composition and the mass percentage of the aluminum alloy extrusion bar, selecting and adding an ingot containing Al, Mn and Fe into a smelting furnace, melting at the same time at 800 ℃ under 700-;
(3) adding the zirconium-scandium compound material into a smelting furnace, heating and melting, adding trace elements, continuously heating aluminum alloy liquid to 850-1000 ℃, and obtaining a second melt by combining ultrasonic-assisted melting;
(4) keeping the temperature of the smelting furnace at 850-;
(4) refining and degassing with high-purity nitrogen and carbon tetrachloride accounting for 0.2-0.4% of the aluminum liquid for 10-15 minutes, fishing out surface scum, standing the aluminum alloy liquid, cooling to 650-750 ℃, and preparing for pouring;
(5) pressurizing and lifting the refined and impurity-removed aluminum alloy liquid from a pouring inlet for pouring, monitoring a poured ingot by a spraying system, wherein the spraying system is provided with a thermal imaging device, a water flow detector, a direction sensor and a controller, the thermal imaging device, the water flow detector and the direction sensor are respectively in signal connection with the controller, the thermal imaging device can form a thermal imaging picture and transmit the thermal imaging picture to the controller, and the controller receives the thermal imaging picture and makes thermal diffusion information so as to control the flow and the spraying direction of the water flow;
(6) after the pouring die cavity is filled in 30-60s, keeping the temperature and the pressure unchanged, and carrying out crusting;
(7) increasing the pressure to 1.2-2.5kPa after the encrusting is finished, and then maintaining the pressure for crystallization.
Optionally, the trace elements are Si, V, Ni, Cr, Zr, Ti, La, Ce.
Optionally, the frequency of the ultrasonic assistance in the step (2) is 20KHz to 120KHz, the time is 1 to 5min, and the ultrasonic vibration amplitude is 0.1 to 2 mm.
Optionally, the frequency of the ultrasonic assistance in the step (3) is 80KHz to 150KHz, the time is 1 to 5min, and the ultrasonic vibration amplitude is 0.2 to 0.4 mm.
Optionally, in the step (5), the pouring temperature is controlled to be 730-750 ℃, the liquid lifting speed is controlled to be 50-100mm/s, and the pressurizing rate is 1.20-2.25 kPa/s; the water flow is 500-2000L/min.
Optionally, the spraying system further comprises a water storage chamber, a pneumatic hydraulic pump, an electromagnetic valve and a plurality of nozzles, the pneumatic hydraulic pump is connected with the water storage chamber, the nozzles are correspondingly arranged on a plurality of spraying positions in the ingot casting range, and water pipelines are respectively connected between the nozzles and the water storage chamber; the water flow detector is arranged at the joint of the water storage chamber and the water pipeline; the electromagnetic valve and the water flow detector are respectively electrically connected with the control system.
Optionally, the direction sensor is arranged at a movable connection position of the nozzle and the water pipeline and used for sensing the direction of the cooling water sprayed to the ingot by the nozzle.
Optionally, the thermal diffusion information is an infrared thermography, thermal diffusion points with different areas are formed on the infrared thermography, the heating temperature can be determined according to the thermal diffusion points with different areas, when the heating temperature is lower than 650 ℃, the controller controls the spraying amount of the cooling water to be 0, when the heating temperature reaches 650-, the spraying time is 5min, the spraying direction of the nozzle is controlled to enable the secondary cooling water to be positioned below the primary cooling water, and the water flow direction of the secondary cooling water forms an included angle of 45-90 degrees with the ingot.
Compared with the prior art, the invention has the beneficial technical effects that:
1. according to the casting method of the aluminum alloy, the zirconium-scandium compound material and the trace elements are added after the first melt is formed to form the second melt, so that the addition of the Cu content in the first melt can be reduced, and the Al-Al content in the melt can be reduced generally when the second melt is formed3Sc eutectic point component and can also replace Al-Al3Part of Sc atoms in the Sc particles form Al-Al3The Sc1-xZrx particles can further improve the tensile strength, yield strength and elongation of the aluminum alloy, and in addition, the uniformity and stability of a melt molten state can be promoted through ultrasonic-assisted melting, so that a subsequent treatment process is promoted.
2. According to the aluminum alloy casting method, the spraying system is arranged to perform a synergistic effect on the cast ingots, so that better and uniform cooling water spraying is formed, the spraying system can also accurately capture the heating condition of the cast ingots, and further more accurate cooling water spraying amount is obtained, the direction sensor is arranged, the spraying direction of the cooling water is further regulated, the condition that the cast ingots are subjected to bamboo joints during casting can be reduced, the using amount of the cooling water can be reduced, and the production cost is reduced.
3. The aluminum alloy casting method has high automation degree, and ensures excellent comprehensive performance and smooth appearance of the aluminum alloy by arranging corresponding smelting process and auxiliary equipment according to the components of the aluminum alloy.
Drawings
The invention will be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.
FIG. 1 is a schematic flow chart of a method of casting an aluminum alloy in accordance with one embodiment of the present invention;
FIG. 2 is a schematic cooling diagram of a conventional aluminum alloy casting process;
FIG. 3 is a schematic cooling diagram of a method of casting an aluminum alloy in accordance with one embodiment of the present invention.
Description of reference numerals: 1-water pipeline; 2, ingot casting; 3-primary cooling water; 4-secondary cooling water.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other methods and/or features of the present embodiments will become apparent to those of ordinary skill in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The present invention is a method of casting an aluminum alloy, according to the following examples illustrated in FIGS. 1-3:
example 1:
an aluminum alloy casting method comprising the steps of:
(1) drying an aluminum alloy raw material, wherein furnace washing treatment is needed before adding the aluminum alloy;
(2) according to the composition and the mass percentage of the aluminum alloy extrusion bar, selecting and adding an ingot containing Al, Mn and Fe into a smelting furnace, melting at 700 ℃ at the same time, and obtaining a first melt through ultrasonic assistance;
(3) adding the zirconium-scandium compound material into a smelting furnace, heating and melting, adding trace elements, continuously heating aluminum alloy liquid to 850 ℃, and performing ultrasonic-assisted melting to obtain a second melt;
(4) keeping the temperature of the smelting furnace at 850 ℃, continuously adding ingots containing Cu and Mg, uniformly smelting, transferring into a heat preservation furnace, and keeping the aluminum-titanium-boron with the usage amount of 0.1 percent of the liquid amount of the aluminum alloy for online modification treatment for 30-40 minutes;
(4) refining and degassing with high-purity nitrogen and carbon tetrachloride accounting for 0.2% of the aluminum liquid for 10-15 minutes, fishing out the surface scum, standing the aluminum alloy liquid, cooling to 650 ℃, and preparing for pouring;
(5) pressurizing and lifting the refined and impurity-removed aluminum alloy liquid from a pouring inlet for pouring, monitoring a poured ingot by a spraying system, wherein the spraying system is provided with a thermal imaging device, a water flow detector, a direction sensor and a controller, the thermal imaging device, the water flow detector and the direction sensor are respectively in signal connection with the controller, the thermal imaging device can form a thermal imaging picture and transmit the thermal imaging picture to the controller, and the controller receives the thermal imaging picture and makes thermal diffusion information so as to control the flow and the spraying direction of the water flow;
(6) after the pouring die cavity is filled in 30-60s, keeping the temperature and the pressure unchanged, and carrying out crusting;
(7) and increasing the pressure to 1.2kPa after the encrusting is finished, and then maintaining the pressure for crystallization.
Wherein the microelements are Si, V, Ni, Cr, Zr, Ti, La and Ce; the ultrasonic auxiliary frequency in the step (2) is 20KHzKHz, the time is 1-5min, and the ultrasonic vibration amplitude is 0.1 mm; the ultrasonic auxiliary frequency in the step (3) is 80KHz, the time is 1-5min, and the ultrasonic vibration amplitude is 0.2 mm; in the step (5), the pouring temperature is controlled at 730 ℃, the liquid lifting speed is controlled at 50mm/s, and the pressurizing rate is 1.20 kPa/s.
In addition, the spraying system also comprises a water storage chamber, a pneumatic hydraulic pump, an electromagnetic valve and a plurality of nozzles, wherein the pneumatic hydraulic pump is connected with the water storage chamber, the nozzles are correspondingly arranged on a plurality of spraying positions in the ingot casting range, and water pipelines are respectively connected between the nozzles and the water storage chamber; the water flow detector is arranged at the joint of the water storage chamber and the water pipeline; the electromagnetic valve and the water flow detector are respectively electrically connected with the control system; the direction sensor is arranged at the movable connection part of the nozzle and the water pipeline and used for sensing the direction of the cooling water sprayed to the cast ingot by the nozzle; the thermal diffusion information is an infrared thermograph, thermal diffusion points with different areas are formed on the infrared thermograph, the heating temperature can be determined according to the thermal diffusion points with different areas, when the heating temperature is lower than 650 ℃, the controller controls the spraying amount of cooling water to be 0, when the heating temperature reaches 650 ℃, the controller controls the electromagnetic valve to be opened for carrying out first cooling water cooling, controls the spraying amount of the cooling water to be 500L/min, controls the spraying time to be 10min, controls the spraying direction of the nozzle to enable the water flow direction to form a 40-degree included angle with the ingot, when the heating temperature reaches 700 ℃, the controller controls the electromagnetic valve to be opened for carrying out second cooling water cooling, controls the spraying amount of the secondary cooling water to be 1000L/min, controls the spraying time to be 5min, and controls the spraying direction of the nozzle to enable the secondary cooling water to be positioned under the first cooling water, and the water flow direction of the secondary cooling water forms an included angle of 90 degrees with the ingot.
Example 2:
an aluminum alloy casting method comprising the steps of:
(1) drying an aluminum alloy raw material, wherein furnace washing treatment is needed before adding the aluminum alloy;
(2) according to the composition and the mass percentage of the aluminum alloy extrusion bar, selecting and adding an ingot containing Al, Mn and Fe into a smelting furnace, simultaneously melting at 800 ℃, and obtaining a first melt through ultrasonic assistance;
(3) adding the zirconium-scandium compound material into a smelting furnace, heating and melting, adding trace elements, continuously heating aluminum alloy liquid to 1000 ℃, and performing ultrasonic-assisted melting to obtain a second melt;
(4) keeping the temperature of the smelting furnace at 1000 ℃, continuously adding ingots containing Cu and Mg, uniformly smelting, transferring into a heat preservation furnace, and keeping the aluminum, titanium and boron with the usage amount of 0.3 percent of the liquid amount of the aluminum alloy for online modification treatment for 30-40 minutes;
(4) refining and degassing for 15 minutes by using high-purity nitrogen and carbon tetrachloride accounting for 0.4 percent of the aluminum liquid, fishing out surface scum, standing the aluminum alloy liquid, cooling to 750 ℃, and preparing for pouring;
(5) pressurizing and lifting the refined and impurity-removed aluminum alloy liquid from a pouring inlet for pouring, monitoring a poured ingot by a spraying system, wherein the spraying system is provided with a thermal imaging device, a water flow detector, a direction sensor and a controller, the thermal imaging device, the water flow detector and the direction sensor are respectively in signal connection with the controller, the thermal imaging device can form a thermal imaging picture and transmit the thermal imaging picture to the controller, and the controller receives the thermal imaging picture and makes thermal diffusion information so as to control the flow and the spraying direction of the water flow;
(6) after the pouring die cavity is filled in 30-60s, keeping the temperature and the pressure unchanged, and carrying out crusting;
(7) and increasing the pressure to 2.5kPa after the encrusting is finished, and then maintaining the pressure for crystallization.
Wherein the microelements are Si, V, Ni, Cr, Zr, Ti, La and Ce; the ultrasonic auxiliary frequency in the step (2) is 120KHz, the time is 1-5min, and the ultrasonic vibration amplitude is 2 mm; the ultrasonic auxiliary frequency in the step (3) is 150KHz, the time is 5min, and the ultrasonic vibration amplitude is 0.4 mm; in the step (5), the pouring temperature is controlled at 750 ℃, the liquid raising speed is controlled at 100mm/s, and the pressurizing rate is 2.25 kPa/s; the water flow rate is 2000L/min.
In addition, the spraying system also comprises a water storage chamber, a pneumatic hydraulic pump, an electromagnetic valve and a plurality of nozzles, wherein the pneumatic hydraulic pump is connected with the water storage chamber, the nozzles are correspondingly arranged on a plurality of spraying positions in the ingot casting range, and water pipelines are respectively connected between the nozzles and the water storage chamber; the water flow detector is arranged at the joint of the water storage chamber and the water pipeline; the electromagnetic valve and the water flow detector are respectively electrically connected with the control system; the direction sensor is arranged at the movable connection part of the nozzle and the water pipeline and used for sensing the direction of the cooling water sprayed to the cast ingot by the nozzle; the thermal diffusion information is an infrared thermograph, thermal diffusion points with different areas are formed on the infrared thermograph, the heating temperature can be determined according to the thermal diffusion points with different areas, when the heating temperature is lower than 650 ℃, the controller controls the spraying amount of cooling water to be 0, when the heating temperature reaches 700 ℃, the controller controls the electromagnetic valve to be opened for carrying out first cooling water cooling, controls the spraying amount of the cooling water to be 1000L/min, controls the spraying time to be 15min, controls the spraying direction of the nozzle to enable the water flow direction to form an included angle of 30 degrees with the ingot, when the heating temperature reaches 750 ℃, the controller controls the electromagnetic valve to be opened for carrying out second cooling water cooling, controls the spraying amount of the secondary cooling water to be 2000L/min, controls the spraying time to be 5min, and controls the spraying direction of the nozzle to enable the secondary cooling water to be positioned under the first cooling water, and the water flow direction of the secondary cooling water forms an included angle of 60 degrees with the ingot.
Example 3:
an aluminum alloy casting method comprising the steps of:
(1) drying an aluminum alloy raw material, wherein furnace washing treatment is needed before adding the aluminum alloy;
(2) according to the composition and the mass percentage of the aluminum alloy extrusion bar, selecting and adding an ingot containing Al, Mn and Fe into a smelting furnace, melting at 750 ℃ simultaneously, and obtaining a first melt through ultrasonic assistance; the ultrasonic auxiliary frequency is 80KHz, the time is 3min, and the ultrasonic vibration amplitude is 1 mm;
(3) adding the zirconium-scandium compound material into a smelting furnace, heating and melting, adding trace elements, continuously heating aluminum alloy liquid to 900 ℃, and performing ultrasonic-assisted melting to obtain a second melt; the ultrasonic auxiliary frequency is 120KHz, the time is 3min, and the ultrasonic vibration amplitude is 0.3 mm;
(4) keeping the temperature of the smelting furnace at 900 ℃, continuously adding ingots containing Cu and Mg, uniformly smelting, transferring into a heat preservation furnace, and keeping the aluminum, titanium and boron with the usage amount of 0.2 percent of the liquid amount of the aluminum alloy for online modification treatment for 35 minutes;
(4) refining and degassing for 10 minutes by using high-purity nitrogen and carbon tetrachloride accounting for 0.3 percent of the aluminum liquid, fishing out surface scum, standing the aluminum alloy liquid, cooling to 700 ℃, and preparing for pouring;
(5) pressurizing and lifting the refined and impurity-removed aluminum alloy liquid from a pouring inlet for pouring, monitoring a poured ingot by a spraying system, wherein the spraying system is provided with a thermal imaging device, a water flow detector, a direction sensor and a controller, the thermal imaging device, the water flow detector and the direction sensor are respectively in signal connection with the controller, the thermal imaging device can form a thermal imaging picture and transmit the thermal imaging picture to the controller, and the controller receives the thermal imaging picture and makes thermal diffusion information so as to control the flow and the spraying direction of the water flow; the spraying system also comprises a water storage chamber, a pneumatic hydraulic pump, an electromagnetic valve and a plurality of nozzles, wherein the pneumatic hydraulic pump is connected with the water storage chamber, the nozzles are correspondingly arranged on a plurality of spraying positions in the ingot casting range, and water pipelines are respectively connected between the nozzles and the water storage chamber; the water flow detector is arranged at the joint of the water storage chamber and the water pipeline; the electromagnetic valve and the water flow detector are respectively electrically connected with the control system; the direction sensor is arranged at the movable connection part of the nozzle and the water pipeline and used for sensing the direction of the cooling water sprayed to the cast ingot by the nozzle; the thermal diffusion information is an infrared thermograph, thermal diffusion points with different areas are formed on the infrared thermograph, the heating temperature can be determined according to the thermal diffusion points with different areas, when the heating temperature is lower than 650 ℃, the controller controls the spraying amount of cooling water to be 0, when the heating temperature reaches 700 ℃, the controller controls the electromagnetic valve to be opened for carrying out first cooling water cooling, controls the spraying amount of the cooling water to be 800L/min, controls the spraying time to be 15min, controls the spraying direction of the nozzle to enable the water flow direction to form a 40-degree included angle with the ingot, when the heating temperature reaches 750 ℃, the controller controls the electromagnetic valve to be opened for carrying out second cooling water cooling, controls the spraying amount of the secondary cooling water to be 1500L/min, controls the spraying time to be 5min, and controls the spraying direction of the nozzle to enable the secondary cooling water to be positioned under the first cooling water, and the water flow direction of the secondary cooling water forms an included angle of 60 degrees with the ingot. The pouring temperature is controlled to be 730-750 ℃, the liquid lifting speed is controlled to be 60mm/s, and the pressurizing rate is 2.00 kPa/s;
(6) after the pouring die cavity is filled in 45s, keeping the temperature and the pressure unchanged, and carrying out crusting;
(7) and increasing the pressure to 2.0kPa after the encrusting is finished, and then maintaining the pressure for crystallization.
Wherein the microelements are Si, V, Ni, Cr, Zr, Ti, La and Ce;
and the aluminum alloy comprises the following elements in percentage by mass: 0.25 to 0.45 percent of Mn, 0.35 to 0.65 percent of Fe, 2.0 to 2.5 percent of Cu, 0.32 to 0.45 percent of Mg, 0.34 to 0.68 percent of Si, 0.01 to 0.12 percent of V, 0.01 to 0.10 percent of Ni, 0.10 to 0.15 percent of Cr, 0.03 to 0.15 percent of Zr, 0.02 to 0.08 percent of Ti, 0.01 to 03 percent of La, 0.01 to 0.05 percent of Ce, 0.05 to 0.15 percent of Sc, the balance of Al and inevitable other impurities, wherein the content of the inevitable other impurities is less than or equal to 0.05 percent individually, and the total amount is less than or equal to 0.15 percent.
In addition, the thermal imaging detects infrared energy in a non-contact mode, converts the infrared energy into an electric signal and further generates a thermal image and a temperature value, the cast ingot generates a heating phenomenon, the spraying system plays a cooling role, the thermal imaging can realize temperature monitoring, an infrared detector and an optical imaging objective lens are utilized to receive an infrared radiation energy distribution pattern of a detected target and reflect the infrared radiation energy distribution pattern to a photosensitive element of the infrared detector, and therefore an infrared thermal image is obtained, and the thermal image corresponds to a thermal distribution field on the surface of an object. Traditionally, thermal infrared imagers have been used to convert the invisible infrared energy emitted by an object into a visible thermal image. The different colors on the thermal image represent different temperatures of the object being measured, with red, pink indicating higher temperatures and blue and green indicating lower temperatures. The heating information collected by the sensor in the controller is transmitted to the signal analysis module, the signal analysis module transmits the washing signal to the controller, the controller sends out a control signal to control the spraying amount and the spraying direction of the cooling water, and the water flow detector can sense the flow of the flowing cooling water.
Comparative example 1:
the only difference from example 3 is that no ultrasonic assistance was used in forming the first melt as well as the second melt, and the other equipment and processes were unchanged.
Comparative example 2:
the difference from the embodiment 3 is that the ingots containing zirconium and scandium are directly and respectively added into a smelting furnace for heating and melting, no compound addition is carried out, and other equipment and processes are not changed.
Comparative example 3:
the difference from the example 3 is that no spraying system is adopted, the primary cooling water and the secondary cooling water are directly sprayed on the cast ingot, and other equipment and processes are not changed.
The overall properties of the aluminum alloys prepared in examples 1-3 and comparative examples 1-3 are reported below:
TABLE 1
| Status of state | Corrosion performance | Plasticity | Cutting performance |
| Example 1 | A | A | A |
| Example 2 | A | A | A |
| Example 3 | A | A | A |
| Comparative example 1 | A | C | D |
| Comparative example 2 | B | B | C |
| Comparative example 3 | A | C | C |
(remarks: A-excellent, B-good, C-medium, D-poor divisions)
TABLE 2
(remarks: A-excellent, B-good, C-medium, D-poor divisions)
And (3) excellent: the condition that no bamboo joint appears in the cast ingot is indicated; good: the condition that a small amount of bamboo joints appear in the cast ingot is indicated; the method comprises the following steps: the condition that more bamboo joints appear in the cast ingot is indicated; difference: this refers to the situation where there are very many slubs in the ingot. And the evaluation standard is subjective evaluation by naked eyes.
According to the data recording and analysis, the aluminum alloy prepared by the method has the advantages of remarkable tensile strength, yield strength and elongation, and an aluminum alloy product with excellent comprehensive performance can be obtained, compared with example 3 in comparative example 1, ultrasonic assistance is not adopted, the overall tensile strength, yield strength and elongation are poorer than those in example 3, and the appearance of the aluminum alloy is influenced due to the fact that a small amount of bamboo joints appear in the ingot; compared with the embodiment 3, the comparative example 2 has the advantages that the ingots containing zirconium and scandium are directly and respectively added into the smelting furnace for heating and melting, no compound addition is carried out, the eutectic point in the melt is high, and the comprehensive performance of the aluminum alloy is influenced; in addition, compared with the comparative example 3 and the example 3, a spraying system is not adopted, not only are extremely many bamboo joints appear in the ingot, but also the required cooling water is correspondingly large, and the production cost is increased.
In summary, the aluminum alloy casting method provided by the invention has the advantages that through the optimization of components and the specific addition of the components, and the spraying system is arranged to perform synergistic effect on the cast ingot, better and uniform cooling water spraying is formed, more accurate cooling water spraying amount can be obtained, the direction sensor is arranged, the spraying direction of the cooling water is further regulated and controlled, the condition that the bamboo joints appear in the cast ingot can be reduced, the consumption of the cooling water can be reduced, and the production cost is reduced.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples. Various configurations may omit, substitute, or add various procedures or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described, and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many elements are examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, e.g., well-known circuits, processes, algorithms, structures, and techniques have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (6)
1. An aluminum alloy casting method, characterized by comprising the steps of:
(1) drying an aluminum alloy raw material, wherein furnace washing treatment is needed before adding the aluminum alloy;
(2) according to the composition and the mass percentage of the aluminum alloy extrusion bar, selecting and adding an ingot containing Al, Mn and Fe into a smelting furnace, melting at the same time at 800 ℃ under 700-;
(3) adding the zirconium-scandium compound material into a smelting furnace, heating and melting, adding trace elements, continuously heating aluminum alloy liquid to 850-1000 ℃, and obtaining a second melt by combining ultrasonic-assisted melting;
(4) keeping the temperature of the smelting furnace at 850-;
(4) refining and degassing with high-purity nitrogen and carbon tetrachloride accounting for 0.2-0.4% of the aluminum liquid for 10-15 minutes, fishing out surface scum, standing the aluminum alloy liquid, cooling to 650-750 ℃, and preparing for pouring;
(5) pressurizing and lifting the refined and impurity-removed aluminum alloy liquid from a pouring inlet for pouring, monitoring a poured ingot by a spraying system, wherein the spraying system is provided with a thermal imaging device, a water flow detector, a direction sensor and a controller, the thermal imaging device, the water flow detector and the direction sensor are respectively in signal connection with the controller, the thermal imaging device can form a thermal imaging picture and transmit the thermal imaging picture to the controller, and the controller receives the thermal imaging picture and makes thermal diffusion information so as to control the flow and the spraying direction of the water flow;
(6) after the pouring die cavity is filled in 30-60s, keeping the temperature and the pressure unchanged, and carrying out crusting;
(7) increasing the pressure to 1.2-2.5kPa after the encrusting is finished, and then maintaining the pressure for crystallization;
the spraying system further comprises a water storage chamber, a pneumatic hydraulic pump, an electromagnetic valve and a plurality of nozzles, the pneumatic hydraulic pump is connected with the water storage chamber, the nozzles are correspondingly arranged on a plurality of spraying positions in the ingot casting range, and water pipelines are respectively connected between the nozzles and the water storage chamber; the water flow detector is arranged at the joint of the water storage chamber and the water pipeline; the electromagnetic valve and the water flow detector are respectively electrically connected with the control system;
the thermal diffusion information is an infrared thermography, thermal diffusion points with different areas are formed on the infrared thermography, the heating temperature can be determined according to the thermal diffusion points with different areas, when the heating temperature is lower than 650 ℃, the controller controls the spraying amount of cooling water to be 0, when the heating temperature reaches 650-, the spraying time is 5min, the spraying direction of the nozzle is controlled to enable the secondary cooling water to be positioned below the primary cooling water, and the water flow direction of the secondary cooling water forms an included angle of 45-90 degrees with the ingot.
2. The aluminum alloy casting method of claim 1, wherein the trace elements are Si, V, Ni, Cr, Zr, Ti, La, Ce.
3. The aluminum alloy casting method as recited in claim 1, wherein the ultrasonic assistance of the step (2) has a frequency of 20kHz to 120kHz for 1 to 5min and an ultrasonic vibration amplitude of 0.1 to 2 mm.
4. The aluminum alloy casting method as recited in claim 1, wherein the ultrasonic assistance in the step (3) has a frequency of 80kHz to 150kHz, a time of 1 to 5min, and an ultrasonic vibration amplitude of 0.2 to 0.4 mm.
5. The aluminum alloy casting method as recited in claim 1, wherein in the step (5), the pouring temperature is controlled to 730 to 750 ℃, the liquid-lifting speed is controlled to 50 to 100mm/s, and the pressurizing rate is 1.20 to 2.25 kPa/s; the water flow is 500-2000L/min.
6. The aluminum alloy casting method according to claim 1, wherein the direction sensor is provided at a movable joint of the nozzle and the water passage pipe, and senses a direction in which the nozzle sprays the cooling water to the ingot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911197268.8A CN111004949B (en) | 2019-11-29 | 2019-11-29 | Aluminum alloy casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911197268.8A CN111004949B (en) | 2019-11-29 | 2019-11-29 | Aluminum alloy casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111004949A CN111004949A (en) | 2020-04-14 |
| CN111004949B true CN111004949B (en) | 2021-02-02 |
Family
ID=70113540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911197268.8A Active CN111004949B (en) | 2019-11-29 | 2019-11-29 | Aluminum alloy casting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111004949B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333676B (en) * | 2021-05-31 | 2022-05-31 | 华中科技大学 | Ultrasonic-assisted device for lost foam casting of magnesium-aluminum bimetal casting and application |
| CN114687811A (en) * | 2022-02-21 | 2022-07-01 | 北京航空材料研究院股份有限公司 | Titanium-aluminum alloy turbine and preparation method thereof |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD264028A1 (en) * | 1987-08-12 | 1989-01-18 | Mansfeld Kombinat W Pieck Veb | METHOD FOR ASSESSING THE SUITABILITY OF ALUMINUM TITANIUM BOR ALLOYS AS A CORNEFING AGENT |
| CN101439396A (en) * | 2008-12-10 | 2009-05-27 | 中国兵器工业第五二研究所 | Counter-pressure casting process for casting parts of door cover |
| CN101838764A (en) * | 2010-03-29 | 2010-09-22 | 江苏大学 | Scandium and strontium compound microalloyed high zinc 2099 type aluminium alloy and preparation method thereof |
| CN101956103A (en) * | 2010-10-20 | 2011-01-26 | 云南铝业股份有限公司 | High strength alloy round aluminium rod and production method thereof |
| CN102672151A (en) * | 2012-06-12 | 2012-09-19 | 肇庆亚洲铝厂有限公司 | Method for preparing large sized aluminum alloy fine crystal ingots |
| CN102861890A (en) * | 2012-09-19 | 2013-01-09 | 中冶南方工程技术有限公司 | Secondary cooling method for reducing transverse cracks of corners of microalloy sheet billet |
| CN103572106A (en) * | 2013-11-22 | 2014-02-12 | 湖南稀土金属材料研究院 | Aluminum alloy material |
| CN104328316A (en) * | 2014-10-15 | 2015-02-04 | 云南云铝润鑫铝业有限公司 | Production method of large diameter 6063 aluminum alloy round ingot casting billet |
| CN104975212A (en) * | 2015-07-17 | 2015-10-14 | 东北轻合金有限责任公司 | Method for manufacturing large high-strength aluminum alloy slab ingot |
| CN108456812A (en) * | 2018-06-29 | 2018-08-28 | 中南大学 | A kind of low Sc high-strength and high ductilities high-hardenability aluminium zinc magnesium series alloy and preparation method |
| CN109811156A (en) * | 2019-04-09 | 2019-05-28 | 池州市安安精工铝业有限公司 | A kind of casting method of high tough aluminium alloy |
| CN110004332A (en) * | 2019-05-23 | 2019-07-12 | 河北工业大学 | Al3Sc-Al3The preparation method of Zr/Al composite material inovulant |
| CN110129596A (en) * | 2019-05-23 | 2019-08-16 | 河北工业大学 | Thin ribbon shaped nanometer Al3The preparation method of (Sc, Zr)/Al composite inoculant |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101450372B (en) * | 2008-12-18 | 2011-03-30 | 苏州有色金属研究院有限公司 | Ingot-casting area water cooling technique during aluminum alloy semi-continuous casting |
| CN101543886A (en) * | 2009-05-12 | 2009-09-30 | 合肥神马科技股份有限公司 | Cooling device for conticaster |
| CN102019390B (en) * | 2010-12-31 | 2012-12-12 | 山东泰山钢铁集团有限公司 | Online austenitic stainless steel continuous casting plate blank water-spraying cooling method and special device thereof |
| CN102489680B (en) * | 2011-12-28 | 2013-05-08 | 东北大学 | System and method for intelligently controlling temperature of internal arc angle part in straightening region of wide and thick plate blank |
| CN105671350A (en) * | 2015-03-19 | 2016-06-15 | 中信戴卡股份有限公司 | Aluminum alloy refiner, preparation method therefor and use thereof |
| CN105583383B (en) * | 2016-01-28 | 2017-09-15 | 北京科技大学 | It is a kind of to prevent the cooling device of continuous casting billet face checking |
| CN106825471B (en) * | 2016-12-20 | 2019-01-11 | 中冶连铸技术工程有限责任公司 | The arrangement of nozzles method and system of billet caster and slab caster |
-
2019
- 2019-11-29 CN CN201911197268.8A patent/CN111004949B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD264028A1 (en) * | 1987-08-12 | 1989-01-18 | Mansfeld Kombinat W Pieck Veb | METHOD FOR ASSESSING THE SUITABILITY OF ALUMINUM TITANIUM BOR ALLOYS AS A CORNEFING AGENT |
| CN101439396A (en) * | 2008-12-10 | 2009-05-27 | 中国兵器工业第五二研究所 | Counter-pressure casting process for casting parts of door cover |
| CN101838764A (en) * | 2010-03-29 | 2010-09-22 | 江苏大学 | Scandium and strontium compound microalloyed high zinc 2099 type aluminium alloy and preparation method thereof |
| CN101956103A (en) * | 2010-10-20 | 2011-01-26 | 云南铝业股份有限公司 | High strength alloy round aluminium rod and production method thereof |
| CN102672151A (en) * | 2012-06-12 | 2012-09-19 | 肇庆亚洲铝厂有限公司 | Method for preparing large sized aluminum alloy fine crystal ingots |
| CN102861890A (en) * | 2012-09-19 | 2013-01-09 | 中冶南方工程技术有限公司 | Secondary cooling method for reducing transverse cracks of corners of microalloy sheet billet |
| CN103572106A (en) * | 2013-11-22 | 2014-02-12 | 湖南稀土金属材料研究院 | Aluminum alloy material |
| CN104328316A (en) * | 2014-10-15 | 2015-02-04 | 云南云铝润鑫铝业有限公司 | Production method of large diameter 6063 aluminum alloy round ingot casting billet |
| CN104975212A (en) * | 2015-07-17 | 2015-10-14 | 东北轻合金有限责任公司 | Method for manufacturing large high-strength aluminum alloy slab ingot |
| CN108456812A (en) * | 2018-06-29 | 2018-08-28 | 中南大学 | A kind of low Sc high-strength and high ductilities high-hardenability aluminium zinc magnesium series alloy and preparation method |
| CN109811156A (en) * | 2019-04-09 | 2019-05-28 | 池州市安安精工铝业有限公司 | A kind of casting method of high tough aluminium alloy |
| CN110004332A (en) * | 2019-05-23 | 2019-07-12 | 河北工业大学 | Al3Sc-Al3The preparation method of Zr/Al composite material inovulant |
| CN110129596A (en) * | 2019-05-23 | 2019-08-16 | 河北工业大学 | Thin ribbon shaped nanometer Al3The preparation method of (Sc, Zr)/Al composite inoculant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111004949A (en) | 2020-04-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106521268B (en) | A kind of consumer electronics shell aluminium alloy and its preparation method and application | |
| CN105886855B (en) | A kind of aluminium alloy thick plate and its production method | |
| CN103451583B (en) | The method producing aircraft wing stringer section bar | |
| CN111004949B (en) | Aluminum alloy casting method | |
| CN105154697B (en) | A kind of production system of intermediate alloy wire rod and its production technology | |
| CN108866363A (en) | A kind of 6082 aluminum alloy thick wall tubing production technologies | |
| WO2020113944A1 (en) | High-strength aluminum alloy for electronic product outer parts and preparation method for high-strength aluminum alloy | |
| CN109234495B (en) | Continuous casting production process of SM4Gr2MnNi die steel plate with low compression ratio and high flaw detection requirement | |
| CN107447133B (en) | A kind of anticorrosive aluminum alloy pipe and preparation method thereof | |
| CN105821265B (en) | A kind of heavy in section heavy wall alloy profile and its production technology | |
| CN109988952B (en) | Preparation method of aluminum alloy mobile phone shell | |
| CN111471904B (en) | Processing technology of ultra-wide 6061 aluminum alloy plate for military test detection platform | |
| CN109304432B (en) | Single-point unbalanced protection casting device for ultrathin large-size aluminum-containing steel special-shaped blank and using method | |
| CN109652670A (en) | A kind of preparation method of Spray-formed Aluminum Alloy | |
| CN106552910A (en) | A kind of continuous casting process for reducing wind-powered electricity generation medium carbon steel continuous cast round billets carbon segregation | |
| CN102634728A (en) | Small square Billet continuous casting production technique of Fe-Mn-C high-manganese steel | |
| CN109609790A (en) | A kind of aluminium alloy and its casting method | |
| CN105624571B (en) | A kind of super-thick steel plate and its production technology | |
| CN108220670A (en) | A kind of Cu-Ni-Si-Mg alloy sheet strips casting-rolling method and casting and rolling installation | |
| CN108754263A (en) | A kind of high intensity space flight aluminium lithium alloy proximate matter and preparation method thereof | |
| CN106077539B (en) | A kind of preparation process of aluminum alloy strip continuous casting and rolling | |
| CN108788033B (en) | Magnesium alloy casting cooling method | |
| CN114410999A (en) | Continuous casting and rolling production process of 3014 aluminum alloy plate strip | |
| CN106756332B (en) | A kind of manufacturing method of aviation high-performance aluminium alloy thin plate | |
| CN104439191A (en) | Production method of 6-sereis alloy ingots |
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 | ||
| CB02 | Change of applicant information |
Address after: 528100 Private Development Zone, Hekou zuotan, southwest Street, Sanshui District, Foshan City, Guangdong Province (extrusion workshop 1, 2, vertical spraying workshop 2, horizontal oxidation workshop 1) Applicant after: FOSHAN SANSHUI FENGLU ALUMINIUM Co.,Ltd. Applicant after: GUANGDONG FENGLU ALUMINIUM Co.,Ltd. Address before: 528200 Dali Fengchi, Nanhai District, Foshan City, Guangdong Province Applicant before: GUANGDONG FENGLU ALUMINIUM Co.,Ltd. Applicant before: FOSHAN SANSHUI FENGLU ALUMINIUM Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |