CN112296314B - Preparing the C with aluminum foil coated on the surface by compoundingfDevice and method for/Mg composite material member - Google Patents
Preparing the C with aluminum foil coated on the surface by compoundingfDevice and method for/Mg composite material member Download PDFInfo
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- CN112296314B CN112296314B CN202010997447.6A CN202010997447A CN112296314B CN 112296314 B CN112296314 B CN 112296314B CN 202010997447 A CN202010997447 A CN 202010997447A CN 112296314 B CN112296314 B CN 112296314B
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- aluminum foil
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D23/00—Casting processes not provided for in groups B22D1/00 - B22D21/00
- B22D23/04—Casting by dipping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
- B22D27/09—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure
- B22D27/11—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting by using pressure making use of mechanical pressing devices
Abstract
The invention relates to a method for preparing a composite C coated with aluminum foil on the surfacefAn apparatus and method for making a/Mg composite material member coated with goldC belonging to aluminum foil corrosion-resistant protective layerf/Mg composite material (Al-C)fMg composite material) component, which is used for realizing the compounding of the composite material and the protection treatment process and changing the mode of separating the composite material preparation from the protection coating preparation. The technical scheme is that aluminum foil is laid on a female die in advance, and magnesium alloy is melted and the aluminum foil is kept in a solid state by controlling temperature and pressure conditions; realization of Al-C by liquid-solid extrusion modefAnd (3) preparing the/Mg composite material member in a composite mode.
Description
Technical Field
The invention belongs to the field of continuous long fiber reinforced magnesium-based composite materials, and relates to corrosion-resistant Al-CfA one-time composite preparation method of a/Mg composite material component, in particular to a C with a surface aluminum metal corrosion-resistant protective layerf/Mg composite material (Al-C)fMg composite material) member.
Background
Cfthe/Mg composite material has a series of advantages of high specific strength, high specific rigidity and the like, but the corrosion resistance is poor, and the application of the composite material is severely limited.
At present, CfThe corrosion protection method of the/Mg composite material is mainly based on the surface modification and protection method of the magnesium alloy. Aluminum and its alloys are often used as protective materials for magnesium alloys and their composites due to their excellent corrosion resistance. Bakkar et al prepared an aluminum alloy coating on the surface of a carbon fiber reinforced Mg-based composite using plasma spraying and Laser remelting techniques to reduce the corrosion current density of the composite by two orders of magnitude (Laser cladding of carbon/magnesium metal composites. Laser In Engineering,15: 63-73.). The process method firstly prepares Cfthe/Mg composite material is subjected to protective treatment by using aluminum alloy with good corrosion resistance, so that C is improvedfThe corrosion resistance of the/Mg composite material. But the whole process from the preparation of the composite material to the protection treatment has more working procedures, low preparation efficiency and higher corresponding cost. The field is lack of a one-time composite preparationCorrosion-resistant protective layer CfA high-efficiency low-cost preparation method of a/Mg composite material.
Disclosure of Invention
Technical problem to be solved
In order to avoid the defects of the prior art, the invention provides a method for preparing a composite C coated with aluminum foil on the surfacefDevice and method for producing corrosion-resistant Al-C/Mg composite material memberfThe one-time composite preparation method of the/Mg composite material member changes a preparation mode of separating a composite material from a protection treatment in sequence, and solves the problems of more working procedures, low efficiency and high cost of the existing mode.
Technical scheme
Composite preparation of C coated with aluminum foil on surfacefThe device for the/Mg composite material member is characterized by comprising a female die 1, a heater 3, an extrusion barrel 6, a sealing block 7, a pressure controller 8, a pressure head 9, a vacuum pressure gauge 11, a vacuum valve 12, a vacuum pump 13 and a temperature controller 14; the bottom of the extrusion barrel 6 is a female die 1, the upper part is a sealing block 7, the top is a pressure head 9, and the periphery is provided with a heater 3; the interior of the extrusion barrel 6 is connected with a vacuum pump 13 through a gas pipeline 10; the gas pipeline 10 is provided with a vacuum pressure gauge 11 and a vacuum valve 12; the heat sensor of the temperature controller 14 is arranged in the extrusion barrel 6, and the temperature control unit is electrically connected with the heater 3; the pressure head 9 is connected with the pressure controller 8 and is controlled by the pressure controller to realize the extrusion process.
The female die 1 and the extrusion container 6 are in transition fit.
The squeezing barrel 6 and the sealing block 7 are in interference fit.
C coated with aluminum foil on surface and prepared by compounding devicefMethod for producing a/Mg composite component, characterized by the following steps:
step 1: placing an aluminum foil with the thickness of 0.05-0.2 mm and the component prefabricated body in an extrusion barrel to be attached to the female die, then loading magnesium alloy, and pressing the sealing block into the extrusion barrel to form interference fit with the extrusion barrel;
step 2: opening a vacuum valve, switching on a vacuum pump to pump vacuum to the extrusion barrel, closing the vacuum valve and the vacuum pump in sequence when the vacuum degree reaches 10 KPa-20 KPa, keeping the vacuum degree for 60 s-100 s, checking the air tightness, and enabling the pressure reduction value to meet the air tightness requirement within 10%;
and step 3: starting a heating controller, heating by using a heating body, and preserving heat for 20-90 min when the temperature is 580-620 ℃ to ensure that the magnesium alloy is molten and the aluminum foil is not molten;
and 4, step 4: closing the heating controller, starting the pressure controller, enabling the pressure head to descend and pressurize to 10-60 MPa, pressing the liquid magnesium alloy into the prefabricated part of the component and fully contacting with the aluminum foil, and keeping the pressure until the alloy is completely solidified;
and 5: when the temperature is reduced to room temperature, the pressure head descends to press out the component.
Advantageous effects
The invention provides a method for preparing a composite C coated with aluminum foil on the surfacefThe device and the method of the/Mg composite material component are C coated with a metal aluminum foil corrosion-resistant protective layerf/Mg composite material (Al-C)fMg composite material) component, which is used for realizing the compounding of the composite material and the protection treatment process and changing the mode of separating the composite material preparation from the protection coating preparation. The technical scheme is that aluminum foil is laid on a female die in advance, and magnesium alloy is melted and the aluminum foil is kept in a solid state by controlling temperature and pressure conditions; realization of Al-C by liquid-solid extrusion modefAnd (3) preparing the/Mg composite material member in a composite mode.
The invention has the beneficial effects that: the invention can lay the aluminum foil with good corrosion resistance in advance to form the CfThe preparation processes of the component prepared from the/Mg composite material and the corrosion-resistant protective coating thereof are integrated to realize Al-CfAnd (3) preparing the/Mg composite material member in a composite mode. Therefore, through one-step preparation process, the composite material member can be prepared, and the corrosion resistance requirement of the member can be ensured.
Drawings
FIG. 1 shows corrosion-resistant Al-C of the present inventionfThe structure schematic diagram of a one-time composite preparation forming device of the/Mg composite material component.
Detailed Description
The invention will now be further described with reference to the following examples and drawings:
the invention relates to corrosion-resistant Al-CfThe device for one-time composite preparation of the/Mg composite material member is characterized by comprising the following components in parts by weight: the device comprises a female die 1, an aluminum heater 3, an extrusion barrel 6, a sealing block 7, a pressure controller 8, a pressure head 9, a gas pipeline 10, a vacuum pressure gauge 11, a vacuum valve 12, a vacuum pump 13 and a temperature controller 14.
The female die 1 is arranged at the bottom of the extrusion container 6, and the female die and the extrusion container are in transition fit. And an aluminum foil 2 is laid on the female die 1, and then a fiber preform 4 is placed. The magnesium alloy 5 is placed on the preform 4. The top of the extrusion container 6 is provided with an upper sealing block 7 which is in interference fit with the upper sealing block to achieve the sealing effect. The extrusion barrel 6 is connected with a vacuum pump 13 through a gas pipeline 10; the gas pipeline 10 is provided with a vacuum pressure gauge 11 and a vacuum valve 12. Thereby achieving a vacuum state in the pressing tub 6. The heater 3 is arranged on the periphery of the extrusion barrel 6. The temperature controller 14 controls the operation of the heater by monitoring the temperature inside the crush can 6. The ram 9 implements the extrusion process by means of the pressure controller 8.
The aluminum foil 2 used in this example is 1060 industrial pure aluminum with a thickness of 0.05 to 0.2mm, and 0.05, 0.1, 0.15 and 0.2mm are selected, respectively.
The matrix metal magnesium alloy 5 is AZ91D magnesium alloy, the liquidus is 596 ℃, and the member preform 4 is woven by T300 carbon fiber.
The female die 1 is first pressed into the bottom of the container 6 and the container 6 is fixed. Then, an aluminum foil 2 is placed on the female die 1; placing the fiber preform 4 on the aluminum foil 2; finally, the magnesium alloy 5 is placed on the fiber preform 4. The sealing block 7 is then pressed into the container 6 to form an interference fit therebetween. Then, the heater 3, the temperature controller 14, the gas line 10, the vacuum pressure gauge 11, the vacuum valve 12, and the vacuum pump 13 are assembled and connected. And then, starting a vacuum pump 13 to vacuumize to 10 KPa-20 KPa, then closing the vacuum valve 12 and the vacuum pump 13 in sequence, keeping the pressure for 60-100 s, checking the air tightness, and enabling the pressure reduction value to meet the air tightness requirement within 10%. Enabling the heater 3 to work, heating to 590-630 ℃, preserving heat for 20-90 minutes, and then closing the heater 3; and then a temperature controller 14 is used for downwards pressurizing the pressure head 9 to 10-60 MPa, and the liquid magnesium alloy is pressed into the prefabricated part and fully contacted with the aluminum foil, so that infiltration is realized and the composite material is densified. When the temperature is reduced to room temperature, the pressure head descends to press out the component.
The female die 1 is first pressed into the bottom of the container 6 and the container 6 is fixed.
Then, an aluminum foil 2 is placed on the female die 1; placing the fiber preform 4 on the aluminum foil 2; finally, the magnesium alloy 5 is placed on the fiber preform 4. The sealing block 7 is then pressed into the container 6 to form an interference fit therebetween.
Then, the heater 3, the temperature controller 14, the gas line 10, the vacuum pressure gauge 11, the vacuum valve 12, and the vacuum pump 13 are assembled and connected.
Then, a vacuum pump 13 is started to vacuumize to 10KPa to 20KPa,
and then closing the vacuum valve 12 and the vacuum pump 13 in sequence, keeping the vacuum valve for 60-100 s, checking the air tightness, and ensuring that the pressure reduction value meets the air tightness requirement within 10 percent. The heater 3 is operated and heated to 590-630 ℃, and the temperature is kept for 20-90 minutes,
then the heater 3 is turned off; and then a temperature controller 14 is used for downwards pressurizing the pressure head 9 to 10-60 MPa, and the liquid magnesium alloy is pressed into the prefabricated part and fully contacted with the aluminum foil, so that infiltration is realized and the composite material is densified. When the temperature is reduced to room temperature, the pressure head descends to press out the component.
Claims (3)
1. Composite preparation of C coated with aluminum foil on surfacefDevice for preparing C coated with aluminum foil on surface of/Mg composite material componentfMethod for producing a/Mg composite component, characterized in that: preparing the C with aluminum foil coated on the surface by compoundingfThe device for the/Mg composite material member comprises a female die (1), a heater (3), an extrusion barrel (6), a sealing block (7), a pressure controller (8), a pressure head (9), a vacuum pressure gauge (11), a vacuum valve (12), a vacuum pump (13) and a temperature controller (14); the bottom of the extrusion barrel (6) is a female die (1), the upper part is a sealing block (7), the top is a pressure head (9), and the periphery is provided with a heater (3); the interior of the extrusion barrel (6) is connected with a vacuum pump (13) through a gas pipeline (10); the gas pipeline (10) is provided with a vacuum pressure gauge (11) and a vacuum valve (12); the thermal sensor of the temperature controller (14) is placed in compressionIn the barrel (6), the temperature control unit is electrically connected with the heater (3); the pressure head (9) is connected with the pressure controller (8) and is controlled by the pressure controller to realize the extrusion process;
the method comprises the following specific steps:
step 1: placing an aluminum foil with the thickness of 0.05-0.2 mm and the component prefabricated body in an extrusion barrel to be attached to the female die, then loading magnesium alloy, and pressing the sealing block into the extrusion barrel to form interference fit with the extrusion barrel;
step 2: opening a vacuum valve, switching on a vacuum pump to pump vacuum to the extrusion barrel, closing the vacuum valve and the vacuum pump in sequence when the vacuum degree reaches 10 KPa-20 KPa, keeping the vacuum degree for 60 s-100 s, checking the air tightness, and enabling the pressure reduction value to meet the air tightness requirement within 10%;
and step 3: starting a heating controller, heating by using a heating body, and preserving heat for 20-90 min when the temperature is 580-620 ℃ so that the magnesium alloy is molten and the aluminum foil is not molten;
and 4, step 4: closing the heating controller, starting the pressure controller, enabling the pressure head to descend and pressurize to 10-60 MPa, pressing the liquid magnesium alloy into the prefabricated part of the component and fully contacting with the aluminum foil, and keeping the pressure until the alloy is completely solidified;
and 5: when the temperature is reduced to room temperature, the pressure head descends to press out the component.
2. The method of claim 1, further comprising: the female die (1) and the extrusion container (6) are in transition fit.
3. The method of claim 1, further comprising: the extrusion barrel (6) and the sealing block (7) are in interference fit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010997447.6A CN112296314B (en) | 2020-09-21 | 2020-09-21 | Preparing the C with aluminum foil coated on the surface by compoundingfDevice and method for/Mg composite material member |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010997447.6A CN112296314B (en) | 2020-09-21 | 2020-09-21 | Preparing the C with aluminum foil coated on the surface by compoundingfDevice and method for/Mg composite material member |
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| CN112296314A CN112296314A (en) | 2021-02-02 |
| CN112296314B true CN112296314B (en) | 2021-12-24 |
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| DE2333359C2 (en) * | 1973-06-30 | 1975-01-30 | Kloeckner-Werke Ag, 4100 Duisburg | Process for the production of clad ingots or slabs |
| JPS5923832A (en) * | 1982-07-30 | 1984-02-07 | Toyota Motor Corp | Production of composite material member |
| JP2612918B2 (en) * | 1988-11-28 | 1997-05-21 | 住友電気工業株式会社 | Method of metal coating core material |
| US7282265B2 (en) * | 2003-05-16 | 2007-10-16 | Hitachi Metals, Ltd. | Composite material having high thermal conductivity and low thermal expansion coefficient, and heat-dissipating substrate, and their production methods |
| JP2006068780A (en) * | 2004-09-02 | 2006-03-16 | Mitsubishi Electric Corp | Manufacturing method of short fiber metallic composite material |
| CN102691021B (en) * | 2012-05-10 | 2013-06-19 | 西北工业大学 | Device and method for preparing aluminum-base composite material by using vacuum impregnation andsolid-liquid direct extrusion |
| CN103801676B (en) * | 2013-12-20 | 2015-10-28 | 西北工业大学 | C fthe liquid-solid pressure former of/Mg composite material thin wall profiled piece and method |
| CN103695815B (en) * | 2013-12-20 | 2015-07-01 | 西北工业大学 | Device and method for separate preheating and one-step infiltration extrusion forming of magnesium-based composite |
| CA3005884A1 (en) * | 2015-11-21 | 2017-05-26 | Ats Mer, Llc | Systems and methods for forming a layer onto a surface of a solid substrate and products formed thereby |
| CN105945259B (en) * | 2016-06-28 | 2018-04-20 | 湖北工业大学 | A kind of forming method of Mg alloy surface refractory coating |
| CN106041031B (en) * | 2016-07-29 | 2019-06-07 | 河海大学常州校区 | A kind of preparation method of cast(ing) surface high entropy alloy coating |
| CN106966753B (en) * | 2017-04-06 | 2021-04-02 | 哈尔滨工业大学 | Preparation method of C/Al-Si-X ablation-resistant composite material |
| CN107695321B (en) * | 2017-09-18 | 2019-06-07 | 江南大学 | A kind of technique in aluminum silicon carbide composite material surface covering aluminium foil |
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